1. DL manuals
  2. Basler
  3. Power distribution unit
  4. BE1-CDS240
  5. Instruction Manual

Basler BE1-CDS240 Instruction Manual

Manual is about: Current Differential Protection System

Summary of BE1-CDS240

  • Page 1

    Instruction manual for current differential system be1-cds240 publication: 9365200990 revision: f 12/08.

  • Page 3: Introduction

    Introduction this instruction manual provides information about the operation and installation of the be1-cds240 current differential system. To accomplish this, the following information is provided:  general information, specifications, and a quick start guide.  functional description and settin...

  • Page 4

    First printing: march 2003 printed in usa © 2008 basler electric, highland illinois 62249 usa all rights reserved december 2008 confidential information of basler electric, highland illinois, usa. It is loaned for confidential use, subject to return on request, and with the mutual understanding that...

  • Page 5: Revision History

    9365200990 rev f be1-cds240 introduction iii revision history the following information provides a historical summary of the changes made to the be1-cds240 hardware, firmware, and software. The corresponding revisions made to this instruction manual (9365200990) are also summarized. Revisions are li...

  • Page 6

    Iv be1-cds240 introduction 9365200990 rev f hardware version and date change n, 08/05  release firmware version 1.02.00. M, 11/04  improved overlay to fit front panel. L, 03/04  minor changes to enhance production efficiency. K, 02/04  increased the size of the insertion/extraction lever in orde...

  • Page 7: Contents

    9365200990 rev f be1-cds240 introduction v contents section 1  general information ................................................................................................ 1-1 section 2  quick start...............................................................................................

  • Page 8

    Vi be1-cds240 introduction 9365200990 rev f this page intentionally left blank..

  • Page 9: Section 1

    9365200990 rev f be1-cds240 general information i section 1  general information table of contents section 1  general information ................................................................................................ 1-1 introduction..........................................................

  • Page 10

    Ii be1-cds240 general information 9365200990 rev f communication ports ....................................................................................................................... 1-26 display....................................................................................................

  • Page 11: Section 1

    9365200990 rev f be1-cds240 general information 1-1 section 1  general information introduction the be1-cds240 current differential system is an economical, microprocessor based, multifunction system that provides a four input, three-phase percentage differential with harmonic restraint protection....

  • Page 12

    1-2 be1-cds240 general information 9365200990 rev f communication options. A highly flexible programmable logic system called bestlogic allows the user to apply the available functions with complete flexibility and customize the system to meet the requirements of the protected power system. Programm...

  • Page 13

    9365200990 rev f be1-cds240 general information 1-3  each output is programmable using bestlogic (assign any virtual output to any physical output relay) and can be given a user meaningful name for the variable and for each state (open and closed) for use in reporting functions.  output logic can ...

  • Page 14

    1-4 be1-cds240 general information 9365200990 rev f fuse loss protection  a fuse loss function, 60fl, protects against false tripping due to a loss of voltage sensing. Breaker failure protection  four (4) breaker failure protection function blocks are assignable to any of the current input circuit...

  • Page 15

    9365200990 rev f be1-cds240 general information 1-5  the demand reporting function records today's peak, yesterday's peak, and peak since reset, with time stamps for each register.  an optional 4,000-point data array can record over 40 days of 15-minute demand data. Differential current monitoring...

  • Page 16

    1-6 be1-cds240 general information 9365200990 rev f version report  the version of the embedded software (firmware) is available from the front panel interface hmi or the communications ports.  the unit serial number and style number is also available from the communications ports. Bestlogic progr...

  • Page 17

    9365200990 rev f be1-cds240 general information 1-7  the ascii command interface is optimized to allow automating the procedure for setting the relay by allowing settings files to be captured from the relay and edited using any software that supports *.Txt file format. These ascii *.Txt files can t...

  • Page 18

    Differential protection application considerations the principle of current differential relaying is simple in concept. Measure the current flowing into the protected zone and the current flowing out of the protected zone. These should match exactly (sum to zero). If they do not, there is a fault wi...

  • Page 19

    Problem 2: measured current magnitude mismatch general the currents measured by each set of current inputs can be transformed from their primary values by different ct ratios. This is illustrated in figure 1-2. When the zone of protection includes a transformer, there is another source of magnitude ...

  • Page 20

    1-10 be1-cds240 general information 9365200990 rev f the tap adjustment factors can be used to eliminate the mismatch when the tap changer is at neutral. But, when the tap changer is off of neutral, differential current will be measured. Be1-cds240 solution the percentage restraint characteristic of...

  • Page 21

    D2837-12 02-26-03 h 2 h 1 h 3 x 2 x 1 x 0 x 3 i cd i c =i cd -i ad i c =-i cy i cy i b =-i by i by i a =-i ay i ay i bd i b =i bd -i cd i ad i a =i ad -i bd x 0 b c a h 3 h 2 h 1 x 1 x 2 x 3 i differential i a i a i a lags i a by 180°+30°=210° i b i c i a i bd i cd i ad -i bd i a =i ad -i bd illustr...

  • Page 22

    H 2 h 1 h 3 c b a x 2 x 1 x 0 x 3 c b a a13 a14 a9 a11 a7 a8 a5 a6 * be1-cds240 *an alternative to grounding one corner of the delta connected cts is to connect the ground to a lead connected to terminal a10, 12, or 14. P0017-03 02-28-03 a4 a3 a12 a10 figure 1-5. Three-phase connections, delta-wye c...

  • Page 23

    Note the be1-cds240 relay uses transformer internal connection information to determine the correct phase compensation to use. It is not possible to reliably determine the phase compensation settings based simply upon phase angle shift information because the phase shift from high to low side is dep...

  • Page 24

    Be1-cds240 solution there are two traditional solutions to this problem. The first is using delta phase-shift compensation on the grounded side of the zone of protection to block the zero-sequence components from getting to the differential protection. The second is removing the zero-sequence compon...

  • Page 25

    This application is greatly simplified with the be1-cds240. The user can connect all cts in wye and specify that the delta transformer winding has a ground source. The be1-cds240 will apply delta compensation to the wye winding to obtain phase shift and zero-sequence compensation for that current in...

  • Page 26

    1-16 be1-cds240 general information 9365200990 rev f these problems are more acute for differential protection since the operating quantity (differential current) is derived from the difference between the measured quantities. Any error in magnitude or angle measurement can result in large inaccurac...

  • Page 27

    Figure 1-8. Style number identification chart operational specifications metered current values and accuracy current range 5 aac nominal: 0.5 to 15 aac 1 aac nominal: 0.1 to 3.0 aac accuracy: ±1% of reading, ±1 least significant digit at 25 c temperature dependence:  ±0.02% per c metered voltage ...

  • Page 28

    1-18 be1-cds240 general information 9365200990 rev f calculated values and accuracy demand range: 0.1 to 1.5 nominal type: exponential accuracy: ±1% of reading, ±1 digit at 25 c temperature dependence:  ±0.02% per c interval: 1 to 60 min true power range 5 ampere ct: -7,500 kw to +7,500 kw 1 ampe...

  • Page 29

    Unrestrained differential (87ut) pickup accuracy 5 ampere ct: ±3% or ±75 ma, whichever is greater 1 ampere ct: ±3% or ±25 ma, whichever is greater response time (see figure 1-9): harmonic inhibit pickup accuracy 5 ampere ct: ±2% of setting or 50 ma, whichever is greater 1 ampere ct: ±2% of setting o...

  • Page 30

    1-20 be1-cds240 general information 9365200990 rev f 87nd neutral differential function restrained differential (87ndpu, 87ndt) pickup accuracy 5 ampere ct: ±4% or ±75 ma 1 ampere ct: ±4% or ±25 ma tap 5 ampere ct range: 2.00 to 20.0 a increment: 0.01 from 2.00 to 9.99 a 0.1 from 10.0 to 20.0 a 1 am...

  • Page 31

    9365200990 rev f be1-cds240 general information 1-21 #50tq: ±0.5% or ±1 cycle, whichever is greater, plus trip time for instantaneous response (0.0 setting) trip time for 0.0 delay setting #50tp, #50tn: 1¼ cycles maximum for current 5 times the pickup setting. 2 cycles maximum for current 1.5 times ...

  • Page 32

    N t t hz v hz v d t 1 nominal / measured / 100 fst e d t t r r equation 1-1. Time to trip equation 1-2. Time to reset where: t t = time to trip t r = time to reset d t = time dial trip d r = time dial, reset e t = elapsed time n = curve exponent (0.5, 1, 2) fst = full scale trip time (t t ) e t /fst...

  • Page 33

    9365200990 rev f be1-cds240 general information 1-23 phase overvoltage function (59p/159p) pickup setting range: 10 to 300 v setting increment: 0.1 v from 0 to 99.9 v 1.0 v from 100 to 300 v accuracy: ±2% or 1 v dropout/pickup ratio: 98% time delay setting range: 0.050 to 600 s increment: 1 ms from ...

  • Page 34

    1-24 be1-cds240 general information 9365200990 rev f accuracy: ±0.5% or ½ cycles; whichever is greater plus 2¼ cycles maximum for currents ≥ 5 times pickup setting. Three cycles maximum for a current of 1.5 times pickup. Four cycles maximum for a current of 1.05 times the pickup setting. Control ti...

  • Page 35

    9365200990 rev f be1-cds240 general information 1-25 1 ampere ct continuous rating: 4 a one second rating: 80 a for other current levels, use the formula i = (k/t) ½ where t = time in seconds and k = 6,400. Begins to clip (saturate): 30 a burden:  at 1 aac analog to digital converter type: 16-bit s...

  • Page 36

    Table 1-1. Control input burden power supply jumper (low) burden jumper (high) burden jumper not installed burden 24 vdc n/a n/a 6 kΩ 48/125 vac/dc 22 k  53 k n/a 125/250 vac/dc 66 k  123 k n/a irig standard: 200-98, format b002 input signal: demodulated (dc level-shifted digital signal) logic-hig...

  • Page 37

    9365200990 rev f be1-cds240 general information 1-27 fast transient qualified to ieee c37.90.1-1989, standard surge withstand capability (swc) tests for protective relays and relay systems. Radio frequency interference (rfi) qualified to ieee c37.90.2-1995, standard for withstand capability of relay...

  • Page 38

    1-28 be1-cds240 general information 9365200990 rev f this page intentionally left blank..

  • Page 39: Section 2

    9365200990 rev f be1-cds240 quick start i section 2  quick start table of contents section 2  quick start.................................................................................................................... 2-1 general ...................................................................

  • Page 40

    Ii be1-cds240 quick start 9365200990 rev f this page intentionally left blank..

  • Page 41: Section 2

    9365200990 rev f be1-cds240 quick start 2-1 section 2  quick start general this section provides an overview of the be1-cds240 current differential system. You should be familiar with the concepts behind the user interfaces and bestlogic before you begin reading about the detailed be1-cds240 functi...

  • Page 42

    The concept is the same but the method is different in that you choose each element by enabling it and use boolean logic expressions to connect the inputs and outputs. The result is that you have even greater flexibility in designing your system than you had using discrete devices. An added benefit ...

  • Page 43

    9365200990 rev f be1-cds240 quick start 2-3 element logic settings to use a protection or control element, two items need to be set. These are the mode and the input logic. The mode is equivalent to deciding which devices you want to install in your protection and control scheme. You then must set t...

  • Page 44

    4. Reports. Display and resetting of report information such as time and date, demand registers, breaker duty statistics, etc. 5. Protection. Display and setting of protective function setting parameters such as logic scheme, pickups, time delays, etc. 6. General settings. Display and setting of non...

  • Page 45

    9365200990 rev f be1-cds240 quick start 2-5 m metering. Read all real time metering values. This general command grouping has no sub- groupings. P program. Subgroup command to read or program a setting. R reports. Read and reset reporting functions such as time and date, demand registers, breaker du...

  • Page 46

    2-6 be1-cds240 quick start 9365200990 rev f on the field end, the technician simply imports the file into the bestcoms database and uploads the file to the relay where it is stored in nonvolatile memory. The gui also has the same preprogrammed logic scheme that is stored in the relay in addition to ...

  • Page 47

    9365200990 rev f be1-cds240 quick start 2-7 while editing this file, it is necessary to set a logic scheme to be active using the sl-n= (set protection logic) command. The default setting is basic-87, which means that several protection elements are enabled and interconnected but are disabled with s...

  • Page 48

    2-8 be1-cds240 quick start 9365200990 rev f 3.) what voltage level is used to develop current flow through the contact sensing inputs? Voltage level is dependent on the power supply option (be1-cds240 style) and the position of the contact-sensing jumper. See section 12, installation, for additional...

  • Page 49

    9365200990 rev f be1-cds240 quick start 2-9 13.) does the be1-cds240 have a battery installed as the back-up power source for the internal clock on loss of power? Yes, as an option. The relay also uses a capacitor as a back-up power source for the internal clock on loss of power. This design maintai...

  • Page 50

    2-10 be1-cds240 quick start 9365200990 rev f 17.) is the irig signal modulated or demodulated? The irig signal is demodulated (dc level-shifted digital signal). See section 1, general information; section 6, reporting and alarm functions; and section 12, installation, for additional information. 18....

  • Page 51

    9365200990 rev f be1-cds240 input and output functions i section 3 • input and output functions table of contents section 3 • input and output functions ................................................................................... 3-1 general ......................................................

  • Page 52

    Ii be1-cds240 input and output functions 9365200990 rev f tables table 3-1. Power system measurement function settings ...................................................................... 3-4 table 3-2. Ct input circuit settings for non-transformer or wye-only application.............................

  • Page 53

    9365200990 rev f be1-cds240 input and output functions 3-1 section 3 • input and output functions general be1-cds240 relays have four sets of three-phase current measurement inputs, an ground current measurement input, a three phase voltage measurement input, up to twelve contact sensing (programmab...

  • Page 54

    3-2 be1-cds240 input and output functions 9365200990 rev f be1-cds240 for any protective or metering function that accepts a circuit selection setting. Virtual circuits are referred to as circuits 5 and 6. Voltage measurement three-phase voltage inputs are reduced to internal signal levels by a prec...

  • Page 55

    Power measurement the measured fundamental component of current and voltage as described previously in this section, is used to calculate the power per the following equations. The current input used for power calculations is user selectable between any of the ct inputs or virtual circuit inputs. Fo...

  • Page 56

    ) 30 + ( - i v x 3 = vars x xy 3 sin equation 3-12 i - v = and type sensing on based c or b a, = y and x where x xy measurement functions setup table 3-1 lists the measurement functions settings. Table 3-1. Power system measurement function settings setting range increment unit of measure default no...

  • Page 57

    Figure 3-1. General operation screen, power system/vt setup tab nominal frequency. When the voltage and current signals are too low for the frequency to be reliably measured, the adc circuit defaults to operation at the nominal frequency setting. This can be set for operation on either 50 or 60-hert...

  • Page 58

    Determine which power measurement calculations are used. Most of these connections such as 3w, 4w, an, or ab are self-explanatory. These settings can be made using bestcoms, the optional hmi using screen 6.3.1.1, \setup\pwr_s\conn\vtp, and from the ascii command interface using the sg-vtp command. C...

  • Page 59

    C b a d2837-15 12-22-98 zone of protection polarity into zone wye dab dac i b i a n i c i a -i b i b -i c i c -i a i a -i c i b -i a i c -i b figure 3-3. Ct connections transformer setup to enter transformer settings, select general operation from the screens pull-down menu. Then select the transfor...

  • Page 60

    As described in section 1, general information, differential protection application considerations, when the zone of protection includes a transformer, it may be necessary to provide phase angle and zero sequence compensation to the currents used by the differential protection elements (see figure 3...

  • Page 61

    Dab: , , (+30) b i a i a i ˆ ˆ ' ˆ c i b i b i ˆ ˆ ' ˆ a i c i c i ˆ ˆ ' ˆ dac: , , (-30) c i a i a i ˆ ˆ ' ˆ a i b i b i ˆ ˆ ' ˆ b i c i c i ˆ ˆ ' ˆ rev: (+180) a i a i ˆ ' ˆ b i b i ˆ ' ˆ c i c i ˆ ' ˆ r1: , , (+120) c i a i ˆ ' ˆ a i b i ˆ ' ˆ b i c i ˆ ' ˆ r2: , , (+240) b i a i ˆ ' ˆ c i b i ˆ ...

  • Page 62

    Table 3-3. Ct input circuit settings 1 for delta/wye circuit applications be1-cds240 settings compensation applied transformer connection ct input connection tx ct phase rotation wye wye wye wye dab for dab connections dac for dac connections none wye dab wye dab wye none wye dac wye dac wye none da...

  • Page 63

    Table 3-4. Ct input circuit settings 2 for delta/wye circuit applications be1-cds240 settings compensation applied transformer connection ct input connection tx ct phase rotation wye wye wye wye dab none wye dab wye dab wye none wye dac wye dac wye r2 dab wye dab wye wye none dac wye dac wye wye r2 ...

  • Page 64

    Table 3-5. Ct input circuit settings 3 for delta/wye circuit applications be1-cds240 settings compensation applied transformer connection ct input connection tx ct phase rotation wye wye wye wye ddab none wye dab wye dab dab none wye dac wye dac dab r2 dab wye dab wye dab none dab dab dab dab wye no...

  • Page 65

    Be1-cds240 settings compensation applied transformer connection ct input connection tx ct phase rotation zab wye zab wye dab none zab dab zab dab wye none zab dac zab dac wye r2 zac wye zac wye dab r2 zac dab zac dab wye r2 zac dac zac dac wye r1 note the ct input circuit settings are used by the au...

  • Page 66

    Additionally, as described in section 1, general information, differential protection application considerations, problem 5, if there is a ground source within the protected zone, the user can apply a numerical, zero-sequence trap to remove the zero-sequence components from the current to prevent mi...

  • Page 67

    Clarity. The number associated with the winding (dy1) can be almost any hour of the clock, hence the term “around the clock” phase shifting. In transformer standards such as ieee c57.12.00 and iec-60076-1, there will be many variations on the nomenclature and figures used to show how the phases are ...

  • Page 68

    Digital input conditioning function the relay scans the inputs for status once per 1.0 ms. The relay uses digital contact recognition and debounce timers that are user settable to condition the signals applied to the inputs. The user can adjust these parameters so that the optimum compromise between...

  • Page 69

    9365200990 rev f be1-cds240 input and output functions 3-17 table 3-8. Digital input conditioning function settings setting range increment unit of measure default recognition time 4 to 255 1 milliseconds 4 debounce time 4 to 255 1 milliseconds 16 time units pull-down menu that selects the unit of m...

  • Page 70

    0.200 sec 0 sec or one shot timer and out[n] hardware output output status and and or control override (0/1) override state (0/1) hold state (0/1) vo[n] virtual output controled by sl-vo[n] logic equation hold ena (sg-hold command) output control (co-out command) and almrel d2647-18 08-20-98 figure ...

  • Page 71

    To enable the hold timer using bestcoms, select inputs and outputs from the screens pull-down menu, and select the outputs 1-14, a tab. To enable the hold timer for a desired output, check the box labeled hold attribute by clicking in the box with the mouse pointer. Refer to figure 3-11. Figure 3-11...

  • Page 72

    3-20 be1-cds240 input and output functions 9365200990 rev f from the current state as determined by the virtual output logic expression to the opposite state for 200 milliseconds. After 200 milliseconds, the output contact is returned automatically to logic control. Pulse override control can be acc...

  • Page 73

    9365200990 rev f be1-cds240 input and output functions 3-21 5. Disable the output control feature. >cs-out=dis out=dis selected >co-out=dis out=dis executed >e (exit) save changes (y/n/c)? >y (yes) retrieving output logic override status the status of the output contact logic override control can be...

  • Page 74

    3-22 be1-cds240 input and output functions 9365200990 rev f this page intentionally left blank..

  • Page 75: Section 4

    9365200990 rev f be1-cds240 protection and control i section 4  protection and control table of contents section 4  protection and control......................................................................................... 4-1 general .............................................................

  • Page 76

    Ii be1-cds240 protection and control 9365200990 rev f operating settings for negative-sequence overvoltage ............................................................. 4-50 retrieving negative-sequence overvoltage status from the relay............................................. 4-51 frequency pro...

  • Page 77

    9365200990 rev f be1-cds240 protection and control iii figure 4-23. Time overcurrent logic block............................................................................................. 4-27 figure 4-24. Bestlogic function element screen, phase (51p).................................................

  • Page 78

    Iv be1-cds240 protection and control 9365200990 rev f table 4-14. Vtp connection cross reference ....................................................................................... 4-31 table 4-15. Operating settings for voltage restraint/control for time overcurrent ...............................

  • Page 79: Section 4

    Section 4  protection and control general be1-cds240 relays provide many functions that can be used for protection and control of power system equipment in and around the protected zone. Four settings groups are provided for adapting the coordination under various operating conditions with options ...

  • Page 80

    The setting group control function has four logic variable outputs, sg0, sg1, sg2, and sg3. The appropriate variable is asserted when each setting group is active. These logic variables can be used in programmable logic to modify the logic based upon which setting group is active. For example, it ma...

  • Page 81

    9365200990 rev f be1-cds240 protection and control 4-3 at the top center of the bestlogic function element screen is a pull-down menu labeled logic. This menu allows viewing of the bestlogic settings for each preprogrammed logic scheme. A custom logic scheme must be created and selected in the logic...

  • Page 82

    D3 d2 d1 d0 auto sg3 sg2 sg1 sg0 sgc d2647-20 08-21-98 figure 4-3. Input control mode 1 when the setting group control function block is enabled for mode 2, inputs d0 and d1 are read as binary encoded (table 4-2). Inputs d2 and d3 are ignored. A new coded input must be stable for approximately 1 sec...

  • Page 83

    Figure 4-4 shows an example of how the inputs are read when the setting group control function block is enabled for mode 2. Note that a pulse on the d1 input while d0 was also active does not cause a setting group change to sg3 because the auto input is active. Operating settings for setting group c...

  • Page 84

    4-6 be1-cds240 protection and control 9365200990 rev f table 4-3. Operating settings for setting group control setting range purpose default switch time 1 to 60 0 = disabled time in minutes that determines when a setting change occurs once the switch threshold setting is exceeded. 0 switch threshold...

  • Page 85

    Load current as % of s0-51 0 90 80 70 60 50 40 30 20 10 10 0 40 30 20 10 100 90 80 70 60 50 120 110 140 130 150 time (minutes) 3 0 5 2 0 5 sp-group3=5,90,5,75,51p sp-group2=30,75,20,70,51p sg3 sg2 sg1 sg0 sgc d2837-23 05-05-04 figure 4-6. Automatic operation based on load change this function can al...

  • Page 86

    Sg3 sg2 sg1 sg0 sgc load current as % of s0-51 40 30 20 10 100 90 80 70 60 50 120 110 140 130 150 sp-group1=10, 0, 10, 50, 51p 10 10 sp-group3=0,0,0,0,0 sp-group2=0,0,0,0,0 0 90 80 70 60 50 40 30 20 10 100 time (minutes) 0 (0.5a ) d2840-22 05-05-04 figure 4-7. Automatic operation based on cold load ...

  • Page 87

    Cs/co-group command examples: example 1. Read the status of setting group override. >co-group l example 2. Override logic control and change the active setting group to sg1. >cs-group=1 group=1 selected >co-group=1 group=1 executed example 3. Return control of the active setting group to the automat...

  • Page 88

    The measured currents are phase, zero-sequence, and tap compensated. Section 3, input and output functions, power system inputs, describes the setup of the relay for phase and zero-sequence compensation. Setup of the tap adjustment compensation is described later in this section. The restraint curre...

  • Page 89

    1 2 3 4 1 2 3 o p e r a t i n g c u r r e n t ( i n m u l t i p l e s o f t a p ) restraint current (in multiples of tap) d2837-11.Dwg 01-28-99 sl op e = minimum pickup = 0.01 to 1.00 times tap 5 i i re st r op * 10 0 = (1 5 to 6 0% ) figure 4-10. Percentage restrained differential characteristic if...

  • Page 90

    An alarm variable is also provided in the programmable alarms function that can be used to indicate an alarm condition if the percentage restrained differential protection is nearing a trip condition on load. This alarm triggers a diagnostic routine that attempts to determine the source of the misma...

  • Page 91

    Tap compensation settings for phase differential as discussed in section 1, general information, differential protection application considerations, the measured currents must be tap adjusted to eliminate magnitude mismatch prior to being used by the 87 phase differential protection function. The ta...

  • Page 92

    Together. When the auto-tap calculation feature is used, the relay will give an error message if the spread ratio is greater than ten. If one of the calculated taps is outside the acceptable range (2.0 to 20 for 5 ampere units or 0.4 to 4.0 for 1 ampere units), the auto-tap calculation feature will ...

  • Page 93

    Note the ct input circuit settings are used by the auto-tap calculation function to calculate the correct tap adjustment factor for the differential functions. When entering these settings via the ascii command interface, the validation routine and auto-tap calculation is performed on exit after all...

  • Page 94

    Table 4-7. Operating settings for phase differential setting range increment unit of measure default minimum pickup (minpu) 0 = disabled 0.10 to 1.00 0.01 times tap 0 slope (maximum restraint) (average restraint) 15 to 60 15 a to 60 a 1 1 a % i operate vs. Maximum restraint % i operate vs. Average r...

  • Page 95

    Ckt 1 ckt 3 ckt 2 a 7 . 0.5 a fault 3 a ckt 4 0.5 a 10 a 2 a d2840-39 01-22-04 figure 4-13. Breakers in the differential zone of protection with the breakers included in the transformer differential zone of a traditional arrangement, and using the “maximum restraint current mode,” the restraint valu...

  • Page 96

    Ckt 1 ckt 3 ckt 2 ckt 4 7 a a 5 . 0 0.5 a fault vckt 5 3 a 10 a 2 a d2840-40 01-21-04 figure 4-14. Virtual circuit with a ct virtual restraint was specifically designed for applications where high per unit current flows through the primary or secondary breaker current transformers without flowing th...

  • Page 97

    D2840-25 02-01-99 percent neutral diff (87nd) blk 87ndt 87ndpu mode = 0- disable 1- g vs. N1 2- g vs. N2 figure 4-15. Neutral differential logic block to use this function, the relay must always be installed with the optional independent ground sensing input i g that is the zero-sequence current ent...

  • Page 98

    D2843-01.Vsd 02-08-99 restraint current operating current restrained element fund i op minimum pickup slope 87nd restrained pickup tap adjustment fundamental phasor fund per unit ground phasor 87nd restrained trip tm settable delay figure 4-17. 87 neutral differential protection functional block dia...

  • Page 99

    At the top center of the bestlogic function element screen is a pull-down menu labeled logic. This menu allows viewing of the bestlogic settings for each preprogrammed logic scheme. A custom logic scheme must be created and selected in the logic pull-down menu at the top of the screen before bestlog...

  • Page 100

    The minimum pickup is set in multiples of tap. Equation 4-9 can be used to convert the minpu setting to primary current. The 87nd auto-tap calculation routine uses the minimum allowable taps to allow the minimum pickup to be set to allow maximum sensitivity to ground faults. Ctrn * tapn * minpu ipri...

  • Page 101

    Figure 4-19. Percentage differential screen, 87nd/187nd tab retrieving neutral differential status from the relay the status of each logic variable can be determined from the ascii command interface using the rg- stat command or using the bestcoms metering screen. See section 6, reporting and alarm ...

  • Page 102

    A block logic input is provided to each function and can be used to disable the function. When this expression is true, the function is disabled by forcing the outputs to logic zero and resetting the timers to zero. For example, this could be used similar to a torque control contact on an electromec...

  • Page 103

    Bestlogic expression builder, see section 7, bestlogic programmable logic. Select done when the settings have been completely edited. Table 4-10 summarizes the bestlogic settings for instantaneous overcurrent. Table 4-10. Bestlogic settings for instantaneous overcurrent function range/purpose defaul...

  • Page 104

    Figure 4-22. Overcurrent screen, 50t/150t tab the default unit of measure for the pickup setting is secondary amps. Primary amps (pri amps), per unit amps (per u amps), and percent amps (% amps) can also be selected as the pickup setting unit of measure. The unit of measure for the time setting that...

  • Page 105

    Retrieving instantaneous overcurrent status from the relay the status of each logic variable can be determined from the ascii command interface using the rg- stat command or using bestcoms metering screen. See section 6, reporting and alarm functions, general status reporting, for more information. ...

  • Page 106

    Bestlogic settings for time overcurrent bestlogic settings are made from the bestlogic function element screen in bestcoms. Figure 4-24 illustrates the bestcoms screen used to select bestlogic settings for the time overcurrent function. To open the screen, select overcurrent from the screens pull-do...

  • Page 107

    Example 1. Make the following settings to the 51p element using bestcoms. See figure 4-24. Mode: circuit 1 blk: 0 note if the unit has five ampere phase inputs and a one ampere independent ground input, the valid pickup setting range of the neutral overcurrent functions will be dependent upon the lo...

  • Page 108

    Figure 4-25. Overcurrent screen, 51 tab table 4-13. Operating settings for time overcurrent range setting 5 a 1 a increment unit of measure default pickup 0 = disabled 0.5 to 16 0 = disabled 0.1 to 3.2 0.01 for 0.01 to 9.99 0.1 for 10.0 to 16.0 sec. Amps 0 time dial 0.0 to 9.9 0.1 n/a 0 curve see ap...

  • Page 109

    27r threshold setting, the overcurrent element will be blocked. When set for this mode of operation, the 51p pickup setting is typically set near or below load current levels. When set for restraint mode of operation, the pickup of the phase overcurrent element is adjusted based upon the magnitude o...

  • Page 110

    The vt fuse loss detection function (60fl) can also be set to supervise the 51/27r function. It is possible to set the 60fl function to automatically prevent mis-operation on loss of sensing voltage. When the 51/27r function is set for control and a 60fl condition is detected, the phase overcurrent ...

  • Page 111

    Parameter description explanation c coefficient specific to selected curve affects the multiple of pu where the curve would approach infinity if allowed to continue below pickup. Has greatest effect on curve shape near pickup. N exponent specific to selected curve affects how inverse the characteris...

  • Page 112

    Negative-sequence overcurrent protection for years, protection engineers have enjoyed increased sensitivity to phase-to-ground unbalances with the application of ground relays. Ground relays can be set more sensitively than phase relays because a balanced load has no ground (3 i0 ) current component...

  • Page 113

    9365200990 rev f be1-cds240 protection and control 4-35 coordination settings for negative-sequence overcurrent the 51q settings should be checked for coordination with phase-only sensing devices such as downstream fuses and reclosers and/or ground relays. To plot the negative-sequence time current ...

  • Page 114

    Figure 4-30. Volts per hertz overexcitation logic block the integrating time characteristic closely approximates the heating characteristic of the protected equipment as overexcitation increases. A linear reset characteristic provides for the decreasing (cooling) condition. The 24 element is enabled...

  • Page 115

    N t t 1 v/hz v/hz d nominal measured t 100 * * fst e d t t r r equation 4-13. Time to trip equation 4-14. Time to reset where: t t t r d t d r = time to trip = time to reset = time dial trip = time dial, reset e t n fst e t /fst = elapsed time = curve exponent (0.5, 1, 2) = full scale trip time (t t...

  • Page 116

    At the top center of the bestlogic function element screen is a pull-down menu labeled logic. This menu allows viewing of the bestlogic settings for each preprogrammed logic scheme. A custom logic scheme must be created and selected in the logic pull-down menu at the top of the screen before bestlog...

  • Page 117

    Table 4-20 lists the operating settings for volts per hertz overexcitation. Table 4-20. Operating settings for volts per hertz overexcitation setting range increment unit of measure default integrating pickup 0.5 to 6 0.1 sec. V/hz 0 trip time dial 0 to 9.9 0.1 n/a 0 reset time dial 0 to 9.9 0.1 n/a...

  • Page 118

    Volt/hz characteristic 1.0 10.0 100.0 1000.0 100% 105% 110% 115% 120% 125% 130% 135% 140% percent of nominal v/hz ti m e in s e c onds transformer limit generator limit inverse 105%, td=1.9 definite 118%, 6s figure 4-33. Time shown on vertical axis volt/hz characteristic 100% 105% 110% 115% 120% 125...

  • Page 119

    Figure 4-35. Voltage protection screen, overexcitation (24) tab the reset rate is determined by the reset dial setting. A setting of 0.0 enables reset to be instantaneous. Using the inverse squared characteristic, assume a trip time dial setting 2.0 and a pickup multiple of 1.2. The total time to tr...

  • Page 120

    Retrieving volts per hertz overexcitation status from the relay the status of each logic variable can be determined through the ascii command interface using the rg- stat (report general-status) command. See section 6, reporting and alarm functions, general status reporting, for more information. Th...

  • Page 121

    Scheme must be created and selected in the logic pull-down menu at the top of the screen before bestlogic settings can be changed. See section 7, bestlogic programmable logic. Enable the element by selecting its mode of operation from the mode pull-down menu. To connect the elements inputs, select t...

  • Page 122

    Operating settings for phase undervoltage/overvoltage operating settings for the 27p and 59p functions consist of pickup and time delay values. The pickup value determines the level of voltage required for the element to start timing toward a trip. The time delay value determines the length of time ...

  • Page 123

    Table 4-23. Operating settings for phase undervoltage/overvoltage setting range increment unit of measure default pickup 0 = disabled 10 to 300 0.1 for 0 to 99.9 1.0 for 100 to 300 secondary volts † 0 inhibit 27 only 0 = disabled 10 to 300 0.1 secondary volts † 0 50 to 999 milliseconds 1 millisecond...

  • Page 124

    The 59x element is enabled or disabled by the mode input. Two modes are available. Selecting mode 0 disables protection. Mode 2 enables the element as described in this section under bestlogic settings for the auxiliary overvoltage element. The pickup setting determines the voltage pickup level of t...

  • Page 125

    Table 4-24 summarizes the bestlogic settings for auxiliary overvoltage. Table 4-24. Bestlogic settings for auxiliary overvoltage function range/purpose default mode 0 = disabled 2 = 3v0-3-phase vt input 0 blk logic expression that disables function when true. 0 note: to use mode 2, the vtp connectio...

  • Page 126

    Table 4-25 summarizes the operating settings for auxiliary overvoltage. Table 4-25. Operating settings for auxiliary overvoltage setting range increment unit of measure default pickup 0 = disabled 1 to 150 0.1 for 0 to 99.9 1.0 for 100 to 150 secondary volts 0 50 to 999 milliseconds 1 milliseconds 0...

  • Page 127

    The pickup setting determines the voltage pickup level of the element. Voltage pickup is based on pn. The time delay setting controls how long it takes the trip output to become true after the pickup output becomes true. When the monitored voltage increases above the pickup threshold, the pickup out...

  • Page 128

    Table 4-26 summarizes the bestlogic settings for negative-sequence overvoltage. Table 4-26. Bestlogic settings for negative-sequence overvoltage function range/purpose default mode 0 = disabled 1 = enabled 1 blk logic expression that disables function when true. A setting of 0 disables blocking. 0 e...

  • Page 129

    Table 4-27 summarizes operating settings for negative-sequence overvoltage. Table 4-27. Operating settings for negative-sequence overvoltage setting range increment unit of measure default pickup 0 = disabled 10 to 300 0.1 for 0 to 99.9 1.0 for 100 to 300 secondary volts 0 50 to 999 milliseconds 1 m...

  • Page 130

    The blk (block) input is used to disable protection. A bestlogic expression is used to define how the blk input functions. When this expression is true, the element is disabled by forcing the outputs to logic 0 and resetting the timer. This feature functions in a similar way to the torque control co...

  • Page 131

    Over/underfrequency function by selecting its mode of operation from the mode pull-down menu. To connect the elements inputs, select the button for the corresponding input in the bestlogic function element screen. The bestlogic expression builder screen will open. Select the expression type to be us...

  • Page 132

    4-54 be1-cds240 protection and control 9365200990 rev f beside the logic pull-down menu is a pull-down menu labeled settings. The settings menu is used to select the setting group that the element's settings apply to. Over/underfrequency protection can be inhibited when the monitored voltage decreas...

  • Page 133

    Breaker failure protection 50bf - breaker failure protection be1-cds240 relays provide four independent breaker failure protection functions. Each current circuit has an associated breaker failure function. For example, current circuit 1 is internally connected to 50bf; current circuit 2 is internal...

  • Page 134

    Timer times out, the bft output shall be true. A block input is provided to disable the function and reset the timers to zero. If the target is enabled for the function block, the target reporting function will record a target when the protective function trip output is true and the fault recording ...

  • Page 135

    Table 4-30. Bestlogic settings for breaker failure function range/purpose default mode 0 = disable, 1 = enable 0 bfi50 logic expression that starts the breaker failure timer when true. 0 bfi52 logic expression that starts the breaker failure timer when true. 0 52 status monitors the breaker state. 0...

  • Page 136

    4-58 be1-cds240 protection and control 9365200990 rev f table 4-31. Operating settings for breaker failure setting rang unit of m default e increment easure pickup sec. Amps, pri. A r. U. Amps, n/a n/a sec. Amps mps, pe % amps time milliseconds, seconds, minutes, cycles n/a n/a milliseconds ph ult 0...

  • Page 137

    Figure 4-52. General purpose logic timers logic block an ini (initiate) logic input is provided to start the timing sequence. A blk (block) logic input is provided to block operation of the timer. When this expression is true, the function is disabled. Each timer has a t1 time setting and a t2 time ...

  • Page 138

    Mode 2, one-shot nonretriggerable timer the one-shot nonretriggerable timer starts its timing sequence when the initiate input expression changes from false to true. See figure 4-54. The timer will time for delay time t1 and then the output will toggle to true for duration time t2. Additional initia...

  • Page 139

    Mode 5, integrating timer an integrating timer is similar to a pickup/dropout timer except that the pickup time t1 defines the rate that the timer integrates toward timing out and setting the output to true. Conversely, the reset time t2 defines the rate that the timer integrates toward dropout and ...

  • Page 140

    Bestlogic settings for general purpose logic timers bestlogic settings are made from the bestlogic function element screen in bestcoms. Figure 4-59 illustrates the bestcoms screen used to select bestlogic settings for the logic timer elements. To open the bestlogic function element screen for logic ...

  • Page 141

    Example 1. Make the following settings to the 62 logic timer. Figure 4-59 illustrates these settings. Logic: user mode: one shot non-retriggerable initiate: in2 block: 0 operating settings for general purpose logic timers operating settings are made using bestcoms. Figure 4-60 illustrates the bestco...

  • Page 142

     time delays less than 10 cycles can be entered to the nearest 0.1 cycles through the hmi. All time delays can be entered to the nearest 0.01 cycles from the ascii command interface. Time delays entered in cycles are converted to milliseconds or seconds. Increment precision after conversion is limi...

  • Page 143

    60fl v1 8.8% vnom v2 25% v1 i2 17.7% i1 v1 8.8% vnom i1 200% inom i1 8.8% inom 3w/4w sensing 1 or 2 phase fuse loss 3 phase fuse loss a c d f b g e h n 60fl output latch 60fl reset k l m 85% vnom v1 p0002-26 03-22-04 figure 4-62. 60fl element logic table 4-34. 60fl logic parameters input true condit...

  • Page 144

    Table 4-35. 60fl element blocking settings mode input setting explanation default dis when i block is disabled, current tripping level is determined by the sensing voltage level (51/27r operates normally). I block ena when i block is enabled and the 60fl logic is true (voltage sensing is lost), the ...

  • Page 145

    V0in inputs: lse & 3p4w=true & (in > minimum) & (in > i1*8%) & (v0 > minimum) lse & 3p4w=true & (ig > minimum) & (v0 > minimum) (vx > minimum) ) g the sp-60fl command. D current thresholds that are use loss detection status from the relay test: 60fl=fa v0ig inputs: test: 60fl=fa vxin inputs: test: (...

  • Page 146

    User specified labels could be assigned to each virtual switch and to both states of each switch. In the previous ground cutoff switch example, you might enable one of the switches in bestlogic as mode 2, on/off and connect the output of that switch to the blocking input of the 59x protection elemen...

  • Page 147

    Select before operate control of virtual selector switches the state of each virtual selector switch can be controlled at the optional hmi using screens 2.1.1 through 2.1.8, \ctrl\43\x ssible through the ascii command inter (control select-virtual switch) 43 (operate select-virtual change takes plac...

  • Page 148

    Retrieving virtual selector switches status from the relay the state of each virtual selector switch can be determined from the optional hmi screen 1.4.3, \stat\oper\43. This information is also available through the ascii command interface by using the rg-stat command and on bestcoms metering scree...

  • Page 149

    Figure 4-69. Bestlogic function element screen, 101 at the top center of the bestlogic function element screen is a pull-down menu labeled logic. This menu allows viewing of the bestlogic settings for each preprogrammed logic scheme. A custom logic scheme must be created and selected in the logic pu...

  • Page 150

    4-72 be1-cds240 protection and control 9365200990 rev f cs/co-x101 examples: example 1. The status of the 210 2101 c te. Y command read >co- 1 virtual control switch. The returned setting indicates that the switch is in the after-close sta example 2. Trip the breaker by closing the trip output of th...

  • Page 151: Section 5

    9365200990 rev f be1-cds240 metering i section 5  metering table of contents section 5  metering......................................................................................................................... 5-1 introduction...................................................................

  • Page 152

    Ii be1-cds240 metering 9365200990 rev f this page intentionally left blank..

  • Page 153: Section 5

    9365200990 rev f be1-cds240 metering 5-1 section 5  metering introduction the be1-cds240 current differential system measures the voltage and current inputs, displays those values in real time, records those values every one-half second, and calculates other quantities from the measured inputs. Met...

  • Page 154

    Figure 5-1. Metering - circuits 1 - 6 other metering views can be selected from the view pull-down menu. These alternate views are shown in figures 5-2 through 5-4. Figure 5-2. Metering - watts/vars/va, phase-phase, sequence, phase-neutral, ground 1, frequency 5-2 be1-cds240 metering 9365200990 rev ...

  • Page 155

    Figure 5-3. Metering - alarms, targets, output status, input status figure 5-4. Metering - logic bits views 9365200990 rev f be1-cds240 metering 5-3.

  • Page 156

    5-4 be1-cds240 metering 9365200990 rev f table 5-2. Ascii command and hmi metering cross-reference metering function ascii command hmi screen all metered values m \meter fast metered values m-fast n/a voltage, all values m-v \meter\volt voltage, a-phase m-va \meter\volt\v_ph voltage, b-phase m-vb \m...

  • Page 157

    9365200990 rev f be1-cds240 metering 5-5 metering function ascii command hmi screen current, circuits 1-6, negative-sequence m1-iq, m2-iq, m3-iq, m4-iq, m5-iq, m6-iq \meter\crnt\ct_1-6\i_calc current, ground m-ig \meter\crnt\gnd differential currents, all values md \meter\diff 2 nd harmonics as a % ...

  • Page 158

    5-6 be1-cds240 metering 9365200990 rev f current metered current includes a-phase current, b-phase current, c-phase current, neutral three-phase zero- sequence current, and ground current. Other metered currents include negative-sequence current and derived neutral current. All current measurements ...

  • Page 159: Section 6

    9365200990 rev f be1-cds240 reporting and alarm functions i section 6  reporting and alarm functions table of contents section 6  reporting and alarm functions .......................................................................... 6-1 introduction..................................................

  • Page 160

    Ii be1-cds240 reporting and alarm functions 9365200990 rev f figure 6-6. Percentage differential screen, diff alarm tab .................................................................... 6-14 figure 6-7. Reporting and alarms screen, transformer monitoring tab .........................................

  • Page 161: Section 6

    Section 6  reporting and alarm functions introduction this section describes all available reports from the be1-cds240 current differential system and how they are set and retrieved. All alarm functions are also described along with how major and minor alarms are programmed (or mapped). Relay ident...

  • Page 162

    Clock the be1-cds240 provides a real-time clock with capacitor backup that is capable of operating the clock for up to eight hours after power is removed from the relay. The clock is used by the demand reporting function, the fault reporting function, the oscillograph recording function, and the seq...

  • Page 163

    9365200990 rev f be1-cds240 reporting and alarm functions 6-3 table 6-2. Time and date format settings parameter range default time format 12 (12 hour format) 24 (24 hour format) 24 date format m (mm-dd-yy) d (dd-mm-yy) m automatic daylight savings 0 (daylight saving time disabled) 1 (daylight savin...

  • Page 164

    6-4 be1-cds240 reporting and alarm functions 9365200990 rev f example: sg-utc=0,0,60 for utc offset of 0 minutes, local reference for the dst change, and adjustment amount of 60 minutes the rg-dst command reports start and stop times and dates for daylight saving time referenced to local time. Refer...

  • Page 165

    9365200990 rev f be1-cds240 reporting and alarm functions 6-5 co-43 to co-743 virtual switch function status is reported on this line. This information is also available at hmi screen 1.4.3, \stat\oper\x43, where x is blank, 1, 2, 3, 4, 5, 6, or 7. The status of the 43 switches is also available fro...

  • Page 166

    6-6 be1-cds240 reporting and alarm functions 9365200990 rev f table 6-3. Logic variable status report format 5 0 t p p u 1 5 0 t p p u 2 5 0 t p p u 3 5 0 t p p u 4 5 0 t p p u 5 5 0 t p p u 6 5 0 t p p u 7 5 0 t p p u 5 0 t p t 1 5 0 t p t 2 5 0 t p t 3 5 0 t p t 4 5 0 t p t 5 5 0 t p t 6 5 0 t p t...

  • Page 167

    Energy data energy information in the form of watthours and varhours is measured and reported by the be1-ips100. Both positive and negative values are reported in three-phase, primary units. Watthour and varhour values are calculated per minute as shown in equation 6-1. Vars or watts secondary minut...

  • Page 168

    Replaces the values and time stamps stored in yesterday's peak registers with the values and time stamps from today's peak registers. It then starts recording new information in today's peak registers. The demand registers are stored in volatile memory. The today's peak and yesterday's peak register...

  • Page 169

    9365200990 rev f be1-cds240 reporting and alarm functions 6-9 table 6-4. Demand settings for current setting range increment unit of measure default phase interval (minutes) 0 to 60 1 minutes 15 neutral interval (minutes) 0 to 60 1 minutes 1 neg.-sequence interval (minutes) 0 to 60 1 minutes 1 calcu...

  • Page 170

    Figure 6-4. Reporting and alarms screen, v & p demand tab table 6-5 provides the specifications for the demand alarm threshold settings. The ascii commands for setting the demand alarm thresholds are listed in section 11, ascii command interface. Table 6-5. Demand alarm threshold settings demand ala...

  • Page 171

    9365200990 rev f be1-cds240 reporting and alarm functions 6-11 setting the load profile recording function for the load profile recording function to log data, you must set the demand logging interval. This can be done from the ascii command interface using the sg-log (setting general, logging inter...

  • Page 172

    6-12 be1-cds240 reporting and alarm functions 9365200990 rev f measured secondary current with phase compensation applied. Tap compensated current (tap comp i) is the tap and phase compensated current actually used by the differential function. Iop is the operating current. Slope ratio is the ratio ...

  • Page 173

    9365200990 rev f be1-cds240 reporting and alarm functions 6-13 measured sec i ct ckt1 0.42 @ 0 0.42 @ 240 0.42 @ 120 ct ckt2 1.01 @ 180 1.01 @ 60 1.01 @ 300 ct ckt3 0.52 @ 151 0.52 @ 31 0.52 @ 271 ct ckt4 0.14 @ 180 0.14 @ 60 0.14 @ 300 angle compensated i ct ckt1 0.42 @ 330 0.42 @ 210 0.42 @ 90 ct ...

  • Page 174

    1 2 3 4 12 opera ting curr ent (in multiple s of tap ) restraint current (in multiples of tap) 3 sl op e = minimum pickup = 0.01 to 1.00 times tap 5 i i re st r op * 10 0 = (1 5 to 6 0% ) sa- dif f = 67 % o f t he per cen tag e r est rai ned di ffe ren tia l d2850-15 05-27-99 figure 6-5. Differentia...

  • Page 175

    9365200990 rev f be1-cds240 reporting and alarm functions 6-15 transformer monitoring functions the transformer monitoring functions provide monitoring and alarms for the transformer to help manage equipment inspection and maintenance expenses. Transformer monitoring functions include through-fault ...

  • Page 176

    Figure 6-7. Reporting and alarms screen, transformer monitoring tab table 6-8. Transformer duty monitoring settings setting range/purpose default 0 = disabled 1 = transformer monitoring enabled with duty calculated as i*t 2 = transformer monitoring enabled with duty calculated as i 2 *t mode t = fau...

  • Page 177

    9365200990 rev f be1-cds240 reporting and alarm functions 6-17 (figure 6-7). Pull down the screens menu and select reporting and alarms. Select the transformer monitoring tab. Alternately, settings can be made using the ascii command sa-tx or using the hmi screen 6.6.2, \setup\xform\alarms. When [n]...

  • Page 178

    Figure 6-8. Reporting and alarms screen, vt monitor tab breaker monitoring depending on the system scheme, one be1-cds240 relay can provide overcurrent protection for more than one circuit breaker. However, breaker-monitoring functions provide extensive monitoring and alarms for only a single circui...

  • Page 179

    Figure 6-9. Reporting and alarms screen, bkr status tab table 6-10 lists the settings for the breaker status reporting function. Table 6-10. Breaker status reporting settings setting range/purpose default breaker closed logic logic expression that is true when the breaker is closed (e.G., 52a logic)...

  • Page 180

    Function (sb-logic). Figure 6-10 illustrates breaker status (sb-logic) during a fault and protective trip. Table 6-11 serves as a legend for the call-outs of figure 6-10. The relay sums the n th power of the currents that are interrupted and will set the breaker duty alarm when the sum exceeds the n...

  • Page 181

    Protective element picks up protective element trips breaker auxiliary contact changes state protective element drops out fast dropout current detector drops out sg-trigger -pickup -logic pu + logic fast dropout current detector breaker status fault summary report triggered (when sg-trigger (pu or l...

  • Page 182

    6-22 be1-cds240 reporting and alarm functions 9365200990 rev f table 6-11. Legend for figure 6-10 locator description a a fault summary report and an oscillograph record are triggered when either the sg- trigger pickup or logic expression becomes true. These reports are also triggered through the hm...

  • Page 183

    Figure 6-11. Reporting and alarms screen, bkr duty tab to connect the functions block logic input. Select the logic button in the block accumulation logic box. The bestlogic function element screen for breaker duty monitoring will appear. See figure 6-12. Then select the block input button. The best...

  • Page 184

    6-24 be1-cds240 reporting and alarm functions 9365200990 rev f table 6-12 summarizes the breaker duty monitoring settings. Table 6-12. Breaker duty monitoring settings setting range/purpose default exponent 1 to 3 in increments of 0.0001 (0 = breaker monitoring disabled) 0.0000 100% duty maximum max...

  • Page 185

    Figure 6-13. Reporting and alarms screen, bkr alarms tab table 6-13 summarizes the breaker alarms settings. Table 6-13. Breaker alarms settings setting range/purpose default mode 0 = disabled 1 = percent duty 2 = number of operations 3 = breaker clearing time 0 point 1 mode 0 to 100 in percent, incr...

  • Page 186

    If the relay detects that the breaker is closed and no voltage is sensed across the terminals of the open output contact after the appropriate coordination time delay (approximately 500 milliseconds), the relay sets an alarm bit in the programmable alarms function and sets the cktmon bestlogic logic...

  • Page 187

    9365200990 rev f be1-cds240 reporting and alarm functions 6-27 in figure 6-16, a 62x auxiliary relay is shown. In this case, the impedance of the 62x coil is small compared to the impedance of the tcm circuit so the tcm is always at logic 1. This prevents the tcm logic from working, even if the trip...

  • Page 188

    Figure 6-17. Bestlogic function element screen, fault recording to connect the function's inputs, select the button for the corresponding input in the bestlogic function element screen. The bestlogic expression builder screen will open. Select the expression type to be used. Then, select the bestlog...

  • Page 189

    9365200990 rev f be1-cds240 reporting and alarm functions 6-29 table 6-15. Protective functions with targets name protective function target default 87r phase differential restrained pickup enabled 87u phase differential unrestrained pickup enabled 87nd, 187nd neutral differential restrained pickup ...

  • Page 190

    Figure 6-18. Reporting and alarms screen, fault recording tab target settings are summarized in table 6-16. Table 6-16. Target settings function purpose specifies which protective elements will trigger a target. When the programmed protective element’s bestlogic expression is true (1) and the trip o...

  • Page 191

    A logic input can be used to reset the target. Using bestcoms, select reporting and alarms from the screens pull-down menu. Then select fault recording tab. The logic input can be connected by selecting the logic button in the target reset pane. When the logic input becomes true, the target is reset...

  • Page 192

    Figure 6-21. View/download relay fault files screen f the screen and then highlighting the fault to be displayed. In figure 6-21, fault 004 is allows a fault to be manually triggered. This can also be done using the sg-trigger ected e as either a binary or ascii file, selected beneath the button. Fr...

  • Page 193

    Fault summary report example: >rf-1 be1-cds240 fault summary report style number : 4e3n1h3n3e1 firmware version : 1.03.00 station id : substation_1 relay id : be1-cds240 user1 id : user1_id user2 id : user2_id relay address : 0 fault number : 1 event type : trip fault date : 09/21/06 fault time : 14...

  • Page 194

    6-34 be1-cds240 reporting and alarm functions 9365200990 rev f fault date and time. These lines report the date and time of the initial trigger of the fault. This is based on either the pickup logic expression or the logic trigger expression becoming true as defined by the sg-trigger command. Fault ...

  • Page 195

    Oscillographic records recording oscillographic records the fault reporting function can record 480 cycles of sample data at 24 samples per cycle for current inputs i a , i b , i c and i g (independent ground input). Each oscillographic record length is determined by the number of partitions program...

  • Page 196

    Retrieving oscillographic records the fault summary directory and the fault summary reports list the numbers assigned to each fault record and the number of oscillographic records associated with each fault. Oscillographic records can be retrieved using bestcoms. Alternately, oscillographic records ...

  • Page 197

    Sequence of events recorder a sequence of events recorder (ser) report is very useful in reconstructing the exact sequence and timing of events during a power disturbance or even normal system operations. The ser tracks over 100 data points by monitoring the internal and external status of the relay...

  • Page 198

    6-38 be1-cds240 reporting and alarm functions 9365200990 rev f new events counter the new events counter tracks how many new entries have been logged to the ser since the new events counter was reset to zero. After ser information is checked, the new events counter can be reset. Then, the next time ...

  • Page 199

    9365200990 rev f be1-cds240 reporting and alarm functions 6-39 through out6) can be programmed to be held closed. For example, to open out5 for indication of relay trouble, set the vo5 logic expression at /0 (sl-vo5=/0). A not zero setting is equal to logic 1. When the relay is fully functional, the...

  • Page 200

    6-40 be1-cds240 reporting and alarm functions 9365200990 rev f i.D. # name description 6 bkr 2 fail alarm breaker failure initiate > control time (150bf). 7 bkr 3 fail alarm breaker failure initiate > control time (250bf). 8 bkr 4 fail alarm breaker failure initiate > control time (350bf). 9 differe...

  • Page 201

    9365200990 rev f be1-cds240 reporting and alarm functions 6-41 i.D. # name description 48 phase demand 3 alarm circuit 3 phase current demand threshold exceeded. 49 phase demand 4 alarm circuit 4 phase current demand threshold exceeded. 50 neutral demand 1 alarm  circuit 1 neutral current demand th...

  • Page 202

    Figure 6-26. Reporting and alarms screen, alarms tab table 6-22 summarizes major, minor, and logic programmable alarm settings. Table 6-22. Programmable alarm settings setting range/purpose default major alarm points (drives major alarm led and almmaj logic variable). List of alarm functions per tab...

  • Page 203

    D2850-09.Vsd 06-29-99 ra-maj=0 logic alarm reset logic ra-min=0 arstkey hmi reset key figure 6-27. Alarm reset logic the reset key of the hmi is context sensitive. That is, the functionality depends upon what screen is currently being displayed. Bestlogic variable arstkey takes advantage of this to ...

  • Page 204

    To reset the alarms using bestcoms select reporting and alarms from the screens pull-down menu. Then select the alarms tab. Select the logic button in the bestlogic box on the right side of the screen. Refer to figure 6-26. The bestlogic function element screen for alarm reset logic will appear. See...

  • Page 205

    Figure 6-30. General operation screen, identification tab figure 6-31. General operation screen, general info tab 9365200990 rev f be1-cds240 reporting and alarm functions 6-45.

  • Page 206

    Settings compare bestcoms has the ability to compare two different settings files. To use this feature, pull down the reports menu and select settings compare. The bestcoms settings compare setup dialog box appears. See figure 6-32. Select the location of the first file to compare under left setting...

  • Page 207: Section 7

    9365200990 rev f be1-cds240 bestlogic programmable logic i section 7  bestlogic programmable logic table of contents section 7  bestlogic programmable logic ........................................................................... 7-1 introduction....................................................

  • Page 208

    Ii be1-cds240 bestlogic programmable logic 9365200990 rev f this page intentionally left blank..

  • Page 209: Section 7

    9365200990 rev f be1-cds240 bestlogic programmable logic 7-1 section 7  bestlogic programmable logic introduction multifunction relays such as the be1-cds240 current differential system are similar in nature to a panel of single-function protective relays. Both must be wired together with ancillary...

  • Page 210

    Figure 7-1. Bestlogic function blocks - page 1 of 5 7-2 be1-cds240 bestlogic programmable logic 9365200990 rev f.

  • Page 211

    Figure 7-2. Bestlogic function blocks - page 2 of 5 9365200990 rev f be1-cds240 bestlogic programmable logic 7-3.

  • Page 212

    Figure 7-3. Bestlogic function blocks - page 3 of 5 7-4 be1-cds240 bestlogic programmable logic 9365200990 rev f.

  • Page 213

    Figure 7-4. Bestlogic function blocks - page 4 of 5 9365200990 rev f be1-cds240 bestlogic programmable logic 7-5.

  • Page 214

    Figure 7-5. Bestlogic function blocks - page 5 of 5 7-6 be1-cds240 bestlogic programmable logic 9365200990 rev f.

  • Page 215

    9365200990 rev f be1-cds240 bestlogic programmable logic 7-7 table 7-1. Logic variable names and descriptions variable name description variable name description inputs and outputs alarms and monitors in1-in12 inputs 1 through 12 status almlgc logic alarm voa relay trouble alarm output status almmaj...

  • Page 216

    7-8 be1-cds240 bestlogic programmable logic 9365200990 rev f variable name description variable name description instantaneous overcurrent voltage 50tpt 50t phase tripped 24t 24 overexcitation tripped 50tppu 50t phase picked up 24pu 24 overexcitation picked up 50tnt 50t neutral tripped 47t 47 negati...

  • Page 217

    Function block logic settings each function block is equivalent to its discrete device counterpart. For example, the phase percentage differential function block in the be1-cds240 relay shown in figure 7-1 has many of the characteristics of a be1-87t transformer differential relay. Before using a pr...

  • Page 218

    Bestlogic expression builder the bestlogic expression builder is used to connect the inputs of the relay's function blocks, physical inputs and outputs, and virtual outputs. Using the bestlogic expression builder is analogous to physically attaching wire between discrete relay terminals. The bestlog...

  • Page 219

    When a custom logic scheme is required, programming time can be reduced by copying a preprogrammed scheme into the active logic. The logic scheme can then be modified to meet the specific application. The active logic scheme digital, multifunction relays must have an active logic scheme in order to ...

  • Page 220

    Custom logic schemes a custom logic scheme can be created from scratch by copying none to logic name and then renaming the logic. A custom logic scheme can also be created by modifying a preprogrammed logic scheme after copying it to logic name and then renaming it. A preprogrammed logic scheme copi...

  • Page 221

    9365200990 rev f be1-cds240 bestlogic programmable logic 7-13 user input and output logic variable names assigning meaningful names to the inputs and outputs makes sequential events reports easier to analyze. Input and output logic variable names are assigned by typing them into the appropriate text...

  • Page 222

    7-14 be1-cds240 bestlogic programmable logic 9365200990 rev f this page intentionally left blank..

  • Page 223: Section 8

    9365200990 rev f be1-cds240 application i section 8  application table of contents section 8  application .................................................................................................................... 8-1 introduction..............................................................

  • Page 224

    Ii be1-cds240 application 9365200990 rev f figures figure 8-1. Typical one-line diagram for cds240-batx-a-be ............................................................... 8-4 figure 8-2. Typical logic diagram for cds240-batx-a-be protection elements ................................... 8-5 figure 8...

  • Page 225

    9365200990 rev f be1-cds240 application iii table 8-37. Miscellaneous logic expressions ........................................................................................ 8-52 table 8-38. Output contact seal-in logic ................................................................................

  • Page 226

    Iv be1-cds240 application 9365200990 rev f this page intentionally left blank..

  • Page 227: Section 8

    Section 8  application introduction this section discusses the application of the be1-cds240 current differential system using a preprogrammed logic scheme. The cds240 has one embedded, default logic scheme (cds240-batx-a- be) as delivered from the factory. This scheme was developed based on custom...

  • Page 228

    Overview of preprogrammed basic transformer protection logic this logic scheme, cds240-batx-a-be provides three-phase, percent-restrained differential protection with high-speed unrestrained instantaneous differential protection. The differential protection also includes 2nd and 5th harmonic restrai...

  • Page 229

    9365200990 rev f be1-cds240 application 8-3 cds240-batx-a-be logic scheme (basic transformer protection) the basic transformer logic scheme (cds240-batx-a-be) was designed to provide a primary zone of differential protection and three backup zones of time overcurrent protection for detecting phase a...

  • Page 230

    52-1 86t t ri p ct input 1 out4 out2 51n 87 ct input g (optional) out5 ct input 1 ct input 2 52-2 t rip be1-cds240 d2843-33 02-26-03 ct input 2 151p 151n 151q 251p 251n 251q out1 out3 figure 8-1. Typical one-line diagram for cds240-batx-a-be 8-4 be1-cds240 application 9365200990 rev f.

  • Page 231

    Figure 8-2. Typical logic diagram for cds240-batx-a-be protection elements referring to figure 8-1, the 87 and 151 protection elements are connected to the high-side ct, input 1. The 87 and 251 protection elements are connected to the low-side ct, input 2. The 51 protection element (n only) is conne...

  • Page 232

    Integration of protection, control, and i/o elements the logic equations of table 8-1 establish the control connections between cds240-batx-a-be scheme elements. For example, the three underlined logic settings in the equations of table 8-1 provide the electrical connection between the 87 element (t...

  • Page 233

    9365200990 rev f be1-cds240 application 8-7 table 8-3. Cds240-batx-a-be function block logic function purpose bestlogic expression mode setting 87 used for percent-restrained differential protection with high- speed unrestrained instantaneous differential protection. 0 1 (enabled) 51n used for timed...

  • Page 234

    8-8 be1-cds240 application 9365200990 rev f state labels output purpose description label true false vo5 time overcurrent trip. May be used to direct trip main breaker or lockout. Vo5 true if any time overcurrent (251p, n, or q) trip occurs. 251trip- vo5 trip normal bestlogic expression: vo5=251pt+2...

  • Page 235

    9365200990 rev f be1-cds240 application 8-9 output purpose description out4 time overcurrent trip. May be used to direct trip main breaker or lockout. Out4 contact closes if any time overcurrent (51n, 151p, n, or q) trip occurs. Bestlogic expression: out4=vo4 out5 time overcurrent trip. May be used ...

  • Page 236

    8-10 be1-cds240 application 9365200990 rev f 51n fed from an optional ground ct (ig), 50p n, and q definite time bus protection as seen from the transformer low-side breaker, and low-side breaker bf (breaker failure) protection with fast current reset. A current supervised, external breaker failure ...

  • Page 237

    9365200990 rev f be1-cds240 application 8-11 cds240-ba87-b-be (basic differential) logic scheme the basic differential logic scheme (cds240-ba87-b-be) provides a primary zone of low-impedance, differential protection, and one backup zone of time overcurrent protection for transformer, generator, mot...

  • Page 238

    Figure 8-3. Typical one-line diagram for cds240-ba87-b-be 8-12 be1-cds240 application 9365200990 rev f.

  • Page 239

    Figure 8-4. Typical logic diagram for cds240-ba87-b-be protection elements referring to all four schemes (generator, motor, bus, and transformer) in figure 8-3, the 87 protection element is connected to ct input 1 and ct input 2. The 51 protection element is also connected to the ct input 1. The 87 ...

  • Page 240

    Led. When the relay self-test detects a problem in the relay (almrel) as programmed for the cds240- ba87-a-be scheme, the relay trouble led lights, output a operates, and all other outputs are disabled. When a major alarm is detected (almmaj), the associated led lights and output six operates. When ...

  • Page 241

    9365200990 rev f be1-cds240 application 8-15 table 8-10. Cds240-ba87-b-be virtual switch logic state labels switch purpose mode label true false n/a no virtual switches used. N/a n/a n/a n/a table 8-11. Cds240-ba87-b-be virtual output logic state labels output purpose description label true false vo...

  • Page 242

    8-16 be1-cds240 application 9365200990 rev f table 8-12. Cds240-ba87-b-be hardware output logic output purpose description outa relay trouble alarm. Outa contact closes when relay trouble alarm occurs. Bestlogic expression: outa=voa out1 phase differential trip. Out1 is a high-speed trip contact. Ou...

  • Page 243

    9365200990 rev f be1-cds240 application 8-17 table 8-13. Cds240-txcl-b-be logic settings and equations sl-n=cds240-txcl-b-be,basler sl-87=1,243 sl-87nd=0,0 sl-187nd=0,0 sl-50bf=0,0,0,0,0 sl-150bf=0,0,0,0,0 sl-250bf=0,0,0,0,0 sl-350bf=0,0,0,0,0 sl-50tp=0,0 sl-50tn=0,0 sl-50tq=0,0 sl-150tp=0,0 sl-150t...

  • Page 244

    52-1 86t t ri p clo se out3 ct input 1 out5 out1 out2 51n 87 ct input g (optional) out4 ct input 1 cutoff ct input 2 52-2 101 clo se t rip t c auto/manual be1-cds240 d2843-35 02-26-03 ct input 2 151p 151n 151q 251p 251n 251q group control 343 143 43 243 figure 8-5. Typical one-line diagram for cds24...

  • Page 245

    87 mode1 87rt 87rpu 51n modeg 51nt 51npu 151p mode1 151pt 151ppu 151n mode1 151nt 151npu 151q mode1 151qt 151qpu in4 not used opto in3 86 status opto in2 breaker2 status opto in1 breaker1 status opto d2843-21 04-20-99 active setting group control mode1 sg0 sg2 sg1 sg3 blk blk blk blk blk auto d3 d2 ...

  • Page 246

    Integration of protection, control, and i/o elements the logic settings in table 8-13 also include the logic equations that establish the control connections between elements of the cds240-txcl-b-be scheme. For example, the three underlined commands in the logic equations of table 8-13 provide the e...

  • Page 247

    9365200990 rev f be1-cds240 application 8-21 table 8-15. Cds240-txcl-b-be function block logic function purpose bestlogic expression mode setting 87 used for percent-restrained differential protection with high-speed unrestrained instantaneous differential protection. Differential function is blocke...

  • Page 248

    8-22 be1-cds240 application 9365200990 rev f table 8-17. Cds240-txcl-b-be virtual output logic state labels output purpose description label true false voa relay trouble alarm. Voa true if relay trouble alarm occurs. Relay- trouble active normal bestlogic expression: voa=0 vo1 phase differential tri...

  • Page 249

    9365200990 rev f be1-cds240 application 8-23 state labels output purpose description label true false vo13 alarm to indicate that differential cutoff switch operation is being blocked. This can be used as a programmable alarm by enabling alarm point 21. The programmable variable label will be displa...

  • Page 250

    8-24 be1-cds240 application 9365200990 rev f cds240-txbu-b-be (transformer diff with backup) logic scheme the transformer with backup (cds240-txbu-b-be) scheme was designed to provide high-speed phase and ground fault protection for a two-winding transformer and definite time backup protection for t...

  • Page 251

    Sl-voa=0 sl-vo1=87rt+87ut+151pt+51nt+151nt+151qt sl-vo2=250tpt+250tnt+250tqt sl-vo3=bft2+62 sl-vo4=87rt+87ut+bfrt2+vo9+101t+251pt+ 251nt+251qt sl-vo5=/in3*/in4*101c sl-vo6=/in5 sl-vo7=0 sl-vo8=0 sl-vo9=87rt*in2*/vo15+in2*87ut*/vo15+ in2*in6*/vo15 sl-vo10=vo11+50tppu*in7+50tnpu*in7+ in7*50tqpu sl-vo1...

  • Page 252

    Figure 8-8. Device interconnection for integrated protection system using be1-cds240 for transformer protection and be1-851 or be1-951 for bus and feeder protection 8-26 be1-cds240 application 9365200990 rev f.

  • Page 253

    52-1 ct input 1 out1 51n 87 ct input g (optional) ct input 1 ct input 2 52-2 c lo se be1-cds240 d2850-28 02-26-03 ct input 2 151p 151n 251p 251n 251q 86t 43 c ut off out2 250tp 250tn 86b 50tp 50tn bf out3 86f 52-2 101 tr ip t c out4 out5 250tq 50tq 62 151q figure 8-9. Typical one-line diagram for cd...

  • Page 254

    8-28 be1-cds240 application 9365200990 rev f typically, the cds240-txbu-b-be scheme would be applied with a be1-851 on the feeder circuits and a be1-851 or be1-cds240 on the bus main breaker interlocked with the feeder relay to provide high- speed, bus fault protection. This combination provides ind...

  • Page 255

    Alarms three logic variables drive the front panel leds: relay trouble (almrel), major alarm (almmaj), and minor alarm (almmin). A fourth logic variable, logic alarm (almlgc), has no associated front panel led. When the relay self-test detects a problem in the relay (almrel) as programmed for the cd...

  • Page 256

    8-30 be1-cds240 application 9365200990 rev f state labels input purpose name label energized de-energized in7 breaker failure initiate by external relays with fault detector supervision. Typically used for overcurrent tripping relays. Ext-bfi-50- supv ini normal in8 puts the relay in test mode so th...

  • Page 257

    9365200990 rev f be1-cds240 application 8-31 table 8-22. Cds240-txbu-b-be virtual switch logic state labels switch purpose mode label true false 43 used as differential cutoff. The 87 is blocked when the switch is in the closed state. 2 (on/off) 87-cutoff disabld normal 743 selects test mode so that...

  • Page 258

    8-32 be1-cds240 application 9365200990 rev f state labels output purpose description label true false vo9 52b supervised breaker failure initiate expression. Initiate bf timing (62 timer) when 87r or 87u trip is true or when external bfi contact (in6) is sensed. Stop bf timing when breaker opens (52...

  • Page 259

    9365200990 rev f be1-cds240 application 8-33 output purpose description out3 breaker 2 failure trip. (86f for example). Out3 closes when bft or 62 times out. Bestlogic expression: out3=vo3 out4 breaker 2 trip. Out4 contact closes 87r or 87u trip output of the phase differential protection function i...

  • Page 260

    8-34 be1-cds240 application 9365200990 rev f table 8-25. Cds240-bsbu-a-be logic settings and equations sl-n=cds240-bsbu-a-be,basler sl-87=1,43 sl-87nd=0,0 sl-187nd=0,0 sl-50bf=0,0,0,0,0 sl-150bf=0,0,0,0,0 sl-250bf=0,0,0,0,0 sl-350bf=0,0,0,0,0 sl-50tp=1,in5 sl-50tn=1,in5 sl-50tq=1,in5 sl-150tp=1,0 sl...

  • Page 261

    P0004-07 08-14-00 be1-cds bus-w-bu relay circuit - + in5 bus-w-bu instantaneous block c25 c26 out4 f1 out6 tx-w-bu ts bus out3 bus-w-bu 94 bus in7 bus-w-bu feeder backup mode c29 c30 in8 bus-w-bu test mode out4 f2 out4 fn out1 bus-w-bu 86b tc trip f1 trip f2 trip fn . . . 86b optional out2 tx-w-bu c...

  • Page 262

    Figure 8-11. Typical one-line diagram for cds240-bsbu-a-be 8-36 be1-cds240 application 9365200990 rev f.

  • Page 263

    51 p m o de1 51pt 5 1 ppu 51 n m o de1 51nt 51 np u 51 q m o de1 51qt 51 q p u op to op to in 2 no t u s e d op to op to d28 50- 04 09 -30- 99 ac t iv e sett ing gr ou p co ntro l m o de2 sg0 sg 2 sg 1 sg 3 bl k bl k bl k au to d3 d2 d1 d0 13 not e : for c larity, mul tiple vari ables go in g to th ...

  • Page 264

    8-38 be1-cds240 application 9365200990 rev f protection elements referring to figure 8-11, the 87, 150/151, 50/51 protection elements are connected to ct input 1 and the feeder side of the 87 protection element is connected to input 2. The 87, 150/151, and 50/51 protection elements are logic enabled...

  • Page 265

    Virtual control switch elements enabled for use in this scheme are 101, 43, and 743. The 101 control switch trips the low-side breaker through output 4 and closes the low-side breaker through output 5. Control switch 43 is used to turn the 87 function on or off and 743 us used to enable test mode. T...

  • Page 266

    8-40 be1-cds240 application 9365200990 rev f state labels input purpose name label energized de-energized in3 used for 86 status indication in ser reports. True when transformer 86 tripped. Also blocks virtual breaker close switch close until 86 is reset. 86t-tripped tripped normal in4 optional inpu...

  • Page 267

    9365200990 rev f be1-cds240 application 8-41 function purpose bestlogic expression mode setting 50tn applied to bus main (ct 1). Normally for fast bus oc protection (2-4 cycles delay) as backup to 87. When in feeder relay backup mode, provides near instantaneous for feeder. Block when feeder relay i...

  • Page 268

    8-42 be1-cds240 application 9365200990 rev f state labels output purpose description label true false vo1 bus fault trip (86b for example). True if bus fault by restrained differential trip or for high-speed bus oc trip (50t) and not in feeder backup mode (vo14). Trip_86b trip normal bestlogic expre...

  • Page 269

    9365200990 rev f be1-cds240 application 8-43 state labels output purpose description label true false vo9 intermediate logic expression for 50t and 51 trip. Used for bus oc trip in normal mode or for feeder relay backup trip in feeder backup mode. True for any primary oc trip (50t or 51). 50t-51-tri...

  • Page 270

    8-44 be1-cds240 application 9365200990 rev f output purpose description out2 transformer fault trip (86b for example). Out2 contact closes when trip bus breaker via lockout for bus faults (250t with 18-20 cycles delay). Bestlogic expression: out2=vo2 out3 feeder breaker trip. Out3 closes when trip f...

  • Page 271

    9365200990 rev f be1-cds240 application 8-45 table 8-31. Cds240-motr-a-be logic settings and equations sl-n=cds240-motr-a-be,basler sl-87=1,0 sl-87nd=0,0 sl-187nd=0,0 sl-50bf=0,0,0,0,0 sl-150bf=0,0,0,0,0 sl-250bf=0,0,0,0,0 sl-350bf=0,0,0,0,0 sl-50tp=1,0 sl-50tn=1,0 sl-50tq=1,0 sl-150tp=1,250tpt+243 ...

  • Page 272

    52 ct input 1 out1 speed switch be1-cds240 d2850-30 02-26-03 ct input 2 50tq 51q tr ip in2 50tn m phase loss unbalance ground fault 51p 251p overload jam 150tp 151p locked rotor 243 143 speed switch selector 50tp start detect high inertia low/high inertia selector 250tp start/running detect 87 ct in...

  • Page 273

    Opto opto opto d2850-06 04-29-99 9 note: for clarity, multiple variables going to the same or gate are shown by a single line into the or gate. 50tn mode1 50tnt 50tnpu 5otq mode1 50tqt 50tqpu blk blk 8 vo11 prot trip vo12 prot pu voa relay trouble outa output logic vo1 motor trip out1 output logic v...

  • Page 274

    8-48 be1-cds240 application 9365200990 rev f if high inertia is selected, it is unblocked when starting as determined by intermediate logic vo7. Virtual control switch 143 selects whether high inertia motor starting is determined by speed switch or by current detection (50tp protection element set a...

  • Page 275

    Element, start is successful. If 150tp times out first, the motor is tripped through output 1. As described under high inertia start, a motor could successfully start but still have abnormally high run currents. If 250tp, start/run current detection times out, 150tp (low inertia locked rotor protect...

  • Page 276

    8-50 be1-cds240 application 9365200990 rev f function purpose bestlogic expression mode setting 251p this element protects for a jam condition. It is blocked while the motor is starting as determined by vo8. Vo8 1 (circuit 1) 50tp 50tp is used for motor start detection (50s). Target should not be en...

  • Page 277

    9365200990 rev f be1-cds240 application 8-51 state labels output purpose description label true false vo7 intermediate logic variable that determines if a high inertia motor application is starting. (not yet up to speed). Sw 143 selects whether starting is determined by monitoring speed switch or cu...

  • Page 278

    8-52 be1-cds240 application 9365200990 rev f state labels output purpose description label true false vo15 unbalance alarm. True if unbalance (51q) protection is picked up. This condition will trip the motor if allowed to time out. Unbalance alarm normal bestlogic expression: vo15=51qpu table 8-36. ...

  • Page 279

    Application tips trip circuit continuity and voltage monitor the trip circuit monitor drives logic variable cktmon. This variable can be used to improve breaker failure logic or to automatically enhance security during testing. If the relay detects a loss of voltage or continuity in the breaker trip...

  • Page 280

    Close-circuit monitor a close-circuit monitor is not included in any of the preprogrammed logic schemes. This function may be added by using a 62 function block and a contact sensing input (inx) to monitor the close circuit. The logic is shown in figure 8-16. The output of the 62 protection block wi...

  • Page 281

    This logic is useful in a situation where two transformers feed a single bus or two busses have a bus tie between them. The feeder and bus relays must be coordinated for the situation where only one source is in service (bus tie open or one transformer out of service). However, when both sources are...

  • Page 282

    Table 8-38. Output contact seal-in logic command purpose sg-hold1=0 turn off the hold timer for output 1. Sl-62=1,in1,0 set the timer logic to mode 1 (pickup/dropout), in1 to initiate, no blocking. S#-62=2c,2c set the pickup (2 cycles) and dropout (2 cycles) times. Vo1=87rt+87ut+vo1 /62 set the tri...

  • Page 283

    87 mode1 87rt 87rpu in4 63_spr opto p0004-08 08-22-00 blk 5 note: for clarity, multiple variables going to the same or gate are shown by a single line into the or gate. 87ut 2ndhar 5thhar 51p mode1 51pt 51ppu 51n mode1 51nt 51npu 51q mode1 51qt 51qpu blk blk blk 5 vo11 prot trip vo12 prot pu voa rel...

  • Page 284

    8-58 be1-cds240 application 9365200990 rev f table 8-39. Logic settings associated with figure 8-19 sl-87=1,0 sl-51p=1,0; sl-51n=1,0; sl-51q=1,0 sl-vo1=vo7+vo13 sl-vo2=vo7+vo13 sl-vo3=vo7+vo13 sl-vo4=51pt+51nt+51qt sl-vo5=/vo7+/vo13 sl-vo6=almmaj sl-vo7=87rt+87ut+vo8 sl-vo8=vo7*/trstkey sl-vo9=vo13*...

  • Page 285: Section 9

    9365200990 rev f be1-cds240 security i section 9  security table of contents section 9  security.......................................................................................................................... 9-1 introduction..................................................................

  • Page 286

    Ii be1-cds240 security 9365200990 rev f this page intentionally left blank..

  • Page 287: Section 9

    9365200990 rev f be1-cds240 security 9-1 section 9  security introduction in this section, security, in the form of multilevel password protection, is discussed along with the information required for protecting specific function groups and user interface components against unauthorized access. Pas...

  • Page 288

    Figure 9-1. General operation screen, global security tab if a change is required and the password security box reads show passwords, press show passwords. Passwords may be entered in the text boxes for global access, settings access, reports access, and control access. See figure 9-2. Each access l...

  • Page 289

    9365200990 rev f be1-cds240 security 9-3 table 9-1 lists password protection settings. Table 9-1. Password protection settings setting range/purpose password user defined alphanumeric string with a maximum of 8 characters. A setting of 0 (zero) disables password protection. Com ports 0 = front rs-23...

  • Page 290

    9-4 be1-cds240 security 9365200990 rev f this page intentionally left blank..

  • Page 291: Section 10

    9365200990 rev f be1-cds240 human-machine interface i section 10  human-machine interface table of contents section 10  human-machine interface ................................................................................... 10-1 general ............................................................

  • Page 292

    Ii be1-cds240 human-machine interface 9365200990 rev f this page intentionally left blank..

  • Page 293: Section 10

    Section 10  human-machine interface general this section describes the be1-cds240 current differential system optional human-machine interface (hmi) and illustrates the front panel display menu tree branches. Front panel display figure 10-1 shows the optional front panel hmi for a horizontal mount ...

  • Page 294

    Locator description g communication port 0 – this rs-232 serial port can be used to communicate with the relay using simple ascii command language. A computer terminal or pc running terminal emulation software (such as windows hyperterminal) is required to send commands to the relay or receive infor...

  • Page 295

    4. Reports – provides display and resetting of report information such as time and date, demand registers, and breaker duty statistics. Reports menu branch structure is illustrated in figures 10-6 and 10-7. 5. Protection logic – provides display and setting of protective functions such as pickups an...

  • Page 296

    Figure 10-4. Be1-cds240 menu tree (control branch) 10-4 be1-cds240 human-machine interface 9365200990 rev f.

  • Page 297

    D 28 40- 29 09 /2 4/ 0 3 vo l t se q var s watt s sc r e en s 3. 4. 2 - w a tt s 3. 4. 3 - v a rs 6 a u x f r eq figure 10-5. Be1-cds240 menu tree (metering pri/sec branch) 9365200990 rev f be1-cds240 human-machine interface 10-5.

  • Page 298

    Figure 10-6. Be1-cds240 menu tree (reports branch) 10-6 be1-cds240 human-machine interface 9365200990 rev f.

  • Page 299

    \prot\sg0 setting group 0 v87 >sg1 \prot\sg1 setting group 1 v87 >sg2 5.2 \prot\sg0\50t instantaneous overcurrent v50t >51 5.1.1 5.1.2 \prot\sg0\87\mva mva = 0.0 tap1=xxxx kv1=xxxx tap2=xxxx kv2=xxxx tap3=xxxx kv3=xxxx tap4=xxxx kv4=xxxx tap 5.1.4.2 \prot protection feeder 2 vsg0 >setup 5 \prot\sg0\...

  • Page 300

    Figure 10-8. Be1-cds240 menu tree (protection branch) (2 of 2) 10-8 be1-cds240 human-machine interface 9365200990 rev f.

  • Page 301

    - figure 10-9. Be1-cds240 menu tree (general settings branch) 9365200990 rev f be1-cds240 human-machine interface 10-9.

  • Page 302

    10-10 be1-cds240 human-machine interface 9365200990 rev f automatic display priority if no front panel-scrolling key has been pressed for approximately five minutes, the relay automatically switches to and displays the highest priority report status menu screen. In a typical application, the user wo...

  • Page 303

    To edit the automatic scrolling list using bestcoms, select general operation from the screens pull- down menu. Then select the hmi display tab. Refer to figure 10-10. The screen numbers listed exhibit the default scrolling list. The list of numbers on the right represents the screen numbers and the...

  • Page 304

    4. Once all of the settings on the screen have been entered, press the edit pushbutton a second time and the settings will be validated. If the settings are in range, the screen will flash changes saved, and the edit led will go out. If you want to abort the edit session without changing any setting...

  • Page 305

    9365200990 rev f be1-cds240 human-machine interface 10-13 resetting functions the reset pushbutton is context sensitive. Its purpose is dependent upon the screen that is presently being displayed. For example, pressing the reset key when the demand screen is displayed will reset the demands but it w...

  • Page 306

    10-14 be1-cds240 human-machine interface 9365200990 rev f this page intentionally left blank..

  • Page 307: Section 11

    9365200990 rev f be1-cds240 ascii command interface i section 11  ascii command interface table of contents section 11  ascii command interface..................................................................................... 11-1 introduction.......................................................

  • Page 308

    Ii be1-cds240 ascii command interface 9365200990 rev f this page intentionally left blank..

  • Page 309: Section 11

    Section 11  ascii command interface introduction relay and power system information can be retrieved from a remote location using the ascii command interface. The ascii command interface is also used to enter settings, retrieve reports and metering information, and perform control operations. A com...

  • Page 310

    11-2 be1-cds240 ascii command interface 9365200990 rev f ascii command interface a computer terminal or pc running terminal emulation software can be used at any of the three serial ports to send commands to the relay. Simple ascii command language is used to communicate with the relay. When the rel...

  • Page 311

    9365200990 rev f be1-cds240 ascii command interface 11-3 example 2. Read all peak-since-reset demand current registers. Entering rd2-pi (report demand - peak current (i)) will return demand values and time stamps for phase a, b, c, neutral, and negative sequence current for current input circuit 2. ...

  • Page 312

    11-4 be1-cds240 ascii command interface 9365200990 rev f access command purpose: read/set access level in order to change settings syntax: access[={password}] example: access=cds comments: the access command must be used before any changes to settings can be made. Available access privileges are sum...

  • Page 313

    9365200990 rev f be1-cds240 ascii command interface 11-5 exit command example: release programming privileges and save settings changes. >exit save changes (y/n/c)? Prompt to save yes, no, or continue >y confirmation to save changes changes saved confirmation that changes were saved settings (s) com...

  • Page 314

    11-6 be1-cds240 ascii command interface 9365200990 rev f sb command purpose: read all breaker settings syntax: sb example: sb sb command example: example 1. Read all breaker settings. >sb sb-duty1=0.0000,0.000e+00,0 sb-duty2=0.0000,0.000e+00,0 sb-duty3=0.0000,0.000e+00,0 sb-duty4=0.0000,0.000e+00,0 ...

  • Page 315

    9365200990 rev f be1-cds240 ascii command interface 11-7 sg-screen5=3.2.1; sg-screen6=3.2.1.1; sg-screen7=3.2.1.2; sg-screen8=3.2.2 sg-screen9=3.2.2.1; sg-screen10=3.2.2.2;sg-screen11=0; sg-screen12=0 sg-screen13=0; sg-screen14=0; sg-screen15=0; sg-screen16=0 sg-com0=9600,a0,p0,r1,x1; sg-com1=9600,a...

  • Page 316

    11-8 be1-cds240 ascii command interface 9365200990 rev f sg-userst31=0,2,0,63 sg-userst32=0,2,0,64 sg-vin1= 1, 0,0,2 sg-vin2= 2, 0,0,2 sg-vin3= 3, 0,0,2 sg-vin4= 4, 0,0,2 sg-vin5= 5, 0,0,2 sg-vin6= 6, 0,0,2 sg-vin7= 7, 0,0,2 sg-vin8= 8, 0,0,2 sg-vin9= 9, 0,0,2 sg-vin10=10, 0,0,2 sg-vin11=11, 0,0,2 s...

  • Page 317

    9365200990 rev f be1-cds240 ascii command interface 11-9 s1-250tn=0.00, 0m s1-250tq=0.00, 0m s1-350tp=0.00, 0m s1-350tn=0.00, 0m s1-350tq=0.00, 0m s1-450tp=0.00, 0m s1-450tn=0.00, 0m s1-550tp=0.00, 0m s1-650tp=0.00, 0m s1-750tp=0.00, 0m s1-51p=0.00,0.0,v2 s1-51n=0.00,0.0,v2 s1-51q=0.00,0.0,v2 s1-151...

  • Page 318

    11-10 be1-cds240 ascii command interface 9365200990 rev f entering sl by itself returns all of the logic equations associated with the active logic scheme including custom logic. Entering sl: returns the names of all available logic schemes. Entering sl: returns all logic equations and settings for ...

  • Page 319

    9365200990 rev f be1-cds240 ascii command interface 11-11 sl-81=0,0 sl-181=0,0 sl-281=0,0 sl-381=0,0 sl-481=0,0 sl-581=0,0 sl-62=0,0,0 sl-162=0,0,0 sl-262=0,0,0 sl-362=0,0,0 sl-group=1,0,0,0,0,/0 sl-43=0 sl-143=0 sl-243=0 sl-343=0 sl-443=0 sl-543=0 sl-643=0 sl-743=0 sl-101=0 sl-1101=0 sl-2101=0 sl-3...

  • Page 320

    11-12 be1-cds240 ascii command interface 9365200990 rev f configuring the serial port communication protocol the serial communication protocol is defined with the sg-com command shown below. Sg-com command purpose: read/set serial communications protocol syntax: sg-com[#[={baud},a{addr},p{pglen},r{r...

  • Page 321

    9365200990 rev f be1-cds240 ascii command interface 11-13 command summary miscellaneous commands access command purpose: read/set access level in order to change settings syntax: access[={password}] example: access=cds reference: section 11, ascii command interface, miscellaneous command description...

  • Page 322

    11-14 be1-cds240 ascii command interface 9365200990 rev f m-pf command purpose: read metered 3 phase power factor syntax: m-pf example: m-pf reference: section 5, metering m-s command purpose: read metered 3 phase va in primary units syntax: m-s example: m-s reference: section 5, metering m-v comman...

  • Page 323

    9365200990 rev f be1-cds240 ascii command interface 11-15 md-i command purpose: read differential currents (compensated currents & iop) syntax: md-i[p[,p/,s]] where p = a/b/c/n example: md-i or md-ia or md-in or md-i,s reference: section 5, metering md-icomp command purpose: read differential curren...

  • Page 324

    11-16 be1-cds240 ascii command interface 9365200990 rev f ra-lgc command purpose: report/reset logic alarm information syntax: ra-lgc[=0] example: ra-lgc reference: section 6, reporting and alarm functions, alarms function ra-maj command purpose: report/reset major alarm information syntax: ra-maj[=...

  • Page 325

    9365200990 rev f be1-cds240 ascii command interface 11-17 rd{n} command purpose: report all demand data for ckt1-4 syntax: rd[n], where n=1,2,3,4 example: rd1, rd2, rd3, rd4 reference: section 6, reporting and alarm functions, demand functions rd-pi command purpose: read/reset peak demand current (i...

  • Page 326

    11-18 be1-cds240 ascii command interface 9365200990 rev f rd-pwatt command purpose: read/reset peak forward and reverse demand watts syntax: rd-pwatt[=0,0] - fwd,rev power flow example: rd-pwatt or rd-pwatt=0,0 reference: section 6, reporting and alarm functions, demand functions rd-t command purpos...

  • Page 327

    9365200990 rev f be1-cds240 ascii command interface 11-19 rd-yvar command purpose: report yesterday's forward and reverse demand vars syntax: rd-yvar example: rd-yvar reference: section 6, reporting and alarm functions, demand functions rd-ywatt command purpose: report yesterday's forward and revers...

  • Page 328

    11-20 be1-cds240 ascii command interface 9365200990 rev f rg-43stat command purpose: report 43 status syntax: rg-43stat example: rg-43stat reference: section 6, reporting and alarm functions, general status reporting rg-addr command purpose: report/set com1/com2 address for polled communications syn...

  • Page 329

    9365200990 rev f be1-cds240 ascii command interface 11-21 rg-outcntrl command purpose: report output control status syntax: rg-outcntrl example: rg-outcntrl reference: section 6, reporting and alarm functions, general status reporting rg-outstat command purpose: report output status syntax: rg-outst...

  • Page 330

    11-22 be1-cds240 ascii command interface 9365200990 rev f rt command purpose: read transformer duty status syntax: rt example: rt reference: section 6, reporting and alarm functions, transformer monitoring rt-duty command purpose: read/set transformer through fault duty log syntax: rt-duty[{n}{phase...

  • Page 331

    9365200990 rev f be1-cds240 ascii command interface 11-23 sa-bkr command purpose: read/set breaker alarm settings where n = 1 to 12 alarms syntax: sa-bkr[n][={mode},{alarm limit},{ckt#}] where mode=0-3(dis/%duty/#op/bkroptim) example: sa-bkr or sa-bkr1=1,80 or sa-bkr2=2,250,2 or sa-bkr3=3,6c,3 refer...

  • Page 332

    11-24 be1-cds240 ascii command interface 9365200990 rev f sa-min command purpose: read/set minor alarm setting mask syntax: sa-min[={alarm num 1}[/{alarm num 2}]...[/{alarm num n}]] example: sa-min or sa-min=2/6/7/10/11 reference: section 6, reporting and alarm functions, alarms function sa-reset co...

  • Page 333

    9365200990 rev f be1-cds240 ascii command interface 11-25 sdnp-bimap command purpose: read/set selection of dnp binary input map syntax: sdnp-bimap[=user(or u)/default(or dft or d)] example: sdnp-bimap=u or sdnp-aimap =dflt reference: distributed network protocol (dnp) manual for be1-cds240 sdnp-dfl...

  • Page 334

    11-26 be1-cds240 ascii command interface 9365200990 rev f general setting commands sg command purpose: read all general settings syntax: sg example: sg reference: section 11, ascii command interface, settings (s) command descriptions sg-ckt command purpose: read/set transformer configuration for eac...

  • Page 335

    9365200990 rev f be1-cds240 ascii command interface 11-27 sg-dst command purpose: read/set daylight saving time (dst) type syntax: sg-dst[=1/2] where 1 means floating date, and 2 means fixed date example: sg-dst, sg-dst=1, sg-dst=2 reference: section 6, reporting and alarms function, clock sg-dststa...

  • Page 336

    11-28 be1-cds240 ascii command interface 9365200990 rev f sg-nom command purpose: read/enter power system nominal voltage & current syntax: sg-nom[={nom volts},{nom amps}] example: sg-nom or sg-nom=120,5 or sg-nom=120,1 reference: section 3, input and output functions, power system inputs. Sg-osc co...

  • Page 337

    9365200990 rev f be1-cds240 ascii command interface 11-29 sg-vckt command purpose: read/set virtual circuits i5 & i6 configuration syntax: sg-vckt[={ckt},{rest}] where ckt = 0-13, rest=0-3 example: sg-vckt=0 for (disable) or sg-vckt=1,1 or sg-vckt=9,2 reference: section 3, input and output functions...

  • Page 338

    11-30 be1-cds240 ascii command interface 9365200990 rev f sl-24 command purpose: read/set logic for 24 function modules syntax: sl-24[={mode},{blk logic}] example: sl-24 or sl-24=1,0 or sl-24=1,in3 reference: section 4, protection and control, voltage protection sl-27 command purpose: read/set logic...

  • Page 339

    9365200990 rev f be1-cds240 ascii command interface 11-31 sl-81 command purpose: read/set logic for 81 function modules syntax: sl-x81[={mode},{blk logic}] where mode=0/1, x = blank,1,2,3,4,5 example: sl-81 or sl-81=1,0 or sl-181=1,in3 reference: section 4, protection and control, frequency protecti...

  • Page 340

    11-32 be1-cds240 ascii command interface 9365200990 rev f s-27r command purpose: read/set (51)/27r control level and operating mode syntax: s{g}-27r[={pu(v)},{mode(m)}] where g=0,1,2,3, m=c-control/r-restraint example: s0-27r or s1-27r=100,c or s2-27=80,r reference: section 4, protection and control...

  • Page 341

    9365200990 rev f be1-cds240 ascii command interface 11-33 s-87 command purpose: read/set the 87 parameters syntax: s{g}-87[={minpu},{slope},{2nd},{5th},{uro},{2nd harmonic sharing}] example: s#-87 or s0-87=0.35,45,18,35,10,1 reference: section 4, protection and control, differential protection s-87n...

  • Page 342

    11-34 be1-cds240 ascii command interface 9365200990 rev f this page intentionally left blank..

  • Page 343: Section 12

    9365200990 rev f be1-cds240 installation i section 12  installation table of contents section 12  installation .............................................................................................................. 12-1 general ..................................................................

  • Page 344

    Ii be1-cds240 installation 9365200990 rev f tables table 12-1. Contact sensing turn-on voltage ....................................................................................... 12-1 table 12-2. Rs-232 pinouts (com0 and com1).........................................................................

  • Page 345: Section 12

    Section 12  installation general be1-cds240 current differential systems are delivered with an instruction manual and bestcoms software in a sturdy carton to prevent shipping damage. Upon receipt of the relay, check the model and style number against the requisition and packaging list for agreement...

  • Page 346

    3. To select operation at the lower end of the control voltage range, position the blue jumper on the two terminals closest to the rear of the circuit board (l). Use care when removing each jumper so that no components are damaged. 4. When all jumpers are positioned for operation in the desired cont...

  • Page 347

     figures 12-8 through 12-10 show the overall dimensions of the case with the vertical panel mounting, l-size.  figure 12-11 is the panel-drilling diagram for the mx case, vertical panel mount.  figures 12-12 and 12-13 are horizontal mount units but shown vertically so that small details can be mo...

  • Page 348

    Figure 12-3. Horizontal panel mount, top view, or vertical "m" size panel mount, side view figure 12-4. Horizontal panel mount, side view, or vertical "m" size, top view 12-4 be1-cds240 installation 9365200990 rev f.

  • Page 349

    Figure 12-5. Horizontal rack mount, front view 9365200990 rev f be1-cds240 installation 12-5.

  • Page 350

    Figure 12-6. Horizontal rack mount, top view figure 12-7. Horizontal rack mount, side view 12-6 be1-cds240 installation 9365200990 rev f.

  • Page 351

    Figure 12-8. Vertical panel mount, l-size, front view 9365200990 rev f be1-cds240 installation 12-7.

  • Page 352

    Figure 12-9. Vertical panel mount, l-size, top view figure 12-10. Vertical panel mount, l-size, side view 12-8 be1-cds240 installation 9365200990 rev f.

  • Page 353

    Figure 12-11. Mx case, vertical panel mount, panel drilling diagram note these dimensions are for the mx case, vertical panel mount or the mx case, horizontal panel mount. Rotate this drawing ninety degrees for the mx case, horizontal panel mount. 9365200990 rev f be1-cds240 installation 12-9.

  • Page 354

    12-10 be1-cds240 installation 9365200990 rev f relay connections relay connections are dependent on the application and logic scheme used. Not all inputs or outputs may be used in a given installation. Incorrect wiring may result in damage to the relay. Be sure to check the model and style number ag...

  • Page 355

    Figure 12-12. Horizontal or vertical rear view terminal connections (i/o option "a" shown) 9365200990 rev f be1-cds240 installation 12-11.

  • Page 356

    Figure 12-13. Horizontal or vertical rear view terminal connections (i/o option "e" shown) 12-12 be1-cds240 installation 9365200990 rev f.

  • Page 357

    Typical ac and dc connections typical external ac and dc connections for the be1-cds240 are shown in figures 12-14 through 12-17. Note the relay should be hard-wired to earth ground with no smaller than 12 awg copper wire attached to the rear ground terminal of the relay case. When the relay is conf...

  • Page 358

    Figure 12-14. Typical ac connection, 3-restraint windings, 2-ig inputs with voltage protection 12-14 be1-cds240 installation 9365200990 rev f.

  • Page 359

    Figure 12-15. Typical ac connection, 4-restraint windings, 1-ig without voltage protection 9365200990 rev f be1-cds240 installation 12-15.

  • Page 360

    Figure 12-16. Typical application, two-winding, transformer with 4-restraint connections 12-16 be1-cds240 installation 9365200990 rev f.

  • Page 361

    Figure 12-17. Typical dc connection diagrams 9365200990 rev f be1-cds240 installation 12-17.

  • Page 362

    Ct polarity ct polarity is critical to the proper operation of the be1-cds240. The sidebar below provides fundamental information on ct polarity and protective relays. Sidebar: current circuit polarity by ansi convention, current transformer polarity will face away from the protected winding of a tr...

  • Page 363

    Power system applications figures 12-21 through 12-25 are examples of the applications that can be served by the basler electric be1-cds240 current differential system. Many of these applications can be used in concert with other basler numeric systems such as the be1-851and be1-951 overcurrent prot...

  • Page 364

    Figure 12-22. Be1-cds240 connected for primary protection, be1-851 connected for independent backup 12-20 be1-cds240 installation 9365200990 rev f.

  • Page 365

    Figure 12-23. Be1-cds240 percentage differential bus protection 9365200990 rev f be1-cds240 installation 12-21.

  • Page 366

    Figure 12-24. Typical connection for motor, generator, or reactor differential protection 12-22 be1-cds240 installation 9365200990 rev f.

  • Page 367

    Figure 12-25. Cds 240 large generator protection - be1-cds240 connected for primary current differential, voltage and frequency protection and metering; be1-gps100 connected for independent backup fault protection, detection of abnormal situations and backup monitoring 9365200990 rev f be1-cds240 in...

  • Page 368

    12-24 be1-cds240 installation 9365200990 rev f settings settings for your application should be entered and confirmed before placing the relay in service. Register settings such as breaker operations and breaker duty can be entered to match the current state of your system. Preparing the relay for s...

  • Page 369

    (be1-cds240) p 0 052 -9 9 view looking into female connector figure 12-26. Rs-232 pinouts figure 12-27. Personal computer to be1-cds240 figure 12-28. Modem to be1-cds240 9365200990 rev f be1-cds240 installation 12-25.

  • Page 370

    Figure 12-29. Rfl9660 protective relay switch to be1-cds240 cable figure 12-30. Sel 2020/2030 to be1-cds240 relay rs-485 connectors rs-485 connections are made at a three-position terminal block connector which mates with a standard communication cable. A twisted pair cable is recommended. Connector...

  • Page 371

    Figure 12-31. Rs-485 db-37 to be1-cds240 irig input and connections the irig input is fully isolated and supports irig standard 200-98, format b002. The demodulated (dc level-shifted) input signal must be 3.5 volts or higher to be recognized as a high logic level. The maximum acceptable input voltag...

  • Page 372

    12-28 be1-cds240 installation 9365200990 rev f this page intentionally left blank..

  • Page 373: Section 13

    9365200990 rev f be1-cds240 testing and maintenance i section 13  testing and maintenance table of contents section 13  testing and maintenance .................................................................................... 13-1 general ...........................................................

  • Page 374

    Ii be1-cds240 testing and maintenance 9365200990 rev f figures figure 13-1. Horizontal or vertical rear view terminal connections (i/o option “a” shown) ............... 13-4 figure 13-2. Series current connection diagram ..................................................................................

  • Page 375

    9365200990 rev f be1-cds240 testing and maintenance iii table 13-33. Restrained trip operate times........................................................................................ 13-47 table 13-34. Second harmonic restraint elements setup commands ...............................................

  • Page 376

    Iv be1-cds240 testing and maintenance 9365200990 rev f table 13-94. X101 virtual breaker control switch test commands..................................................... 13-78 table 13-95. 101 virtual breaker control switch trip test commands ............................................... 13-79 ta...

  • Page 377: Section 13

    9365200990 rev f be1-cds240 testing and maintenance 13-1 section 13  testing and maintenance general the need to test protective relays to confirm performance as designed by relay manufacturers will always exist. This section provides guidelines for performing those tests and others. It also provid...

  • Page 378

    13-2 be1-cds240 testing and maintenance 9365200990 rev f it is not the intent of this manual to elaborate on every conceivable test possible since this would encroach on individual preferences, techniques, and philosophies. It is the intent to pursue relevant testing methods to verify this relay mee...

  • Page 379

    9365200990 rev f be1-cds240 testing and maintenance 13-3 fault reporting and target data is dependent on the proper setting of trip, pickup, and logic trigger expressions (via the sg-trigger command) and the assignment of protective elements to be logged as targets (via the sg-targ command). The ser...

  • Page 380

    Figure 13-1. Horizontal or vertical rear view terminal connections (i/o option “a” shown) 13-4 be1-cds240 testing and maintenance 9365200990 rev f.

  • Page 381

    9365200990 rev f be1-cds240 testing and maintenance 13-5 power up purpose : to verify that the relay performs the power-up sequence. Step 1: apply voltage to input power terminals b2 and b3. Table 13-1 shows the appropriate voltage for each relay style. Table 13-1. Voltage input style number voltage...

  • Page 382

    Style number and serial number verification purpose: to verify that the be1-cds240 relay model number, style number, and current software program version matches the unit/unit labels. Reference commands: rg-ver step 1: through any communications port, transmit the command rg-ver. The be1-cds240 rela...

  • Page 383

    9365200990 rev f be1-cds240 testing and maintenance 13-7 step 3: to verify that all inputs have been detected, transmit the command rg-input to retrieve input (12345678) information. Or, alternatively, transmit the command rg-stat and review the response at the tail end of the line input (12345678)....

  • Page 384

    Figure 13-2. Series current connection diagram step 2: apply 5 amperes of current to 5 ampere rated ct inputs (or 1 ampere to 1 ampere rated ct inputs). Step 3: transmit the command m1-i to the relay or navigate to the front panel hmi screen \meter\crnt\ct_1\i_meas (3.2.1.1) and \meter\crnt\ct_1\i_c...

  • Page 385

    Table 13-5. Circuit 3 metering quantities ct secondary i a3, i b3 and i c3 i n3 i q3 5 a 5.0 a ( 1%) @ 180 o 15.0 a ( 1%) @ 180 0.0 a ( 1%) 1 a 1.0 a ( 1%) @ 180 o 3.0 a ( 1%) @ 180 0.0 a ( 1%) step 6: transmit the command m4-i to the relay or navigate to the front panel hmi screen \meter\crnt\ct_4\...

  • Page 386

    100 volts, m-vca = 100 volts, m-3v0 = 100 volts and m-v2 = 33.4 volts (applied divided by 3), all at +1.0%. Hmi screens 3.1.1, 3.1.2 and 3.1.3 can also be monitored to verify voltage measurements. Step 2: connect an ac voltage source at nominal frequency between relay terminals b10 (b-phase) and b12...

  • Page 387

    And reactive values. Apparent power and power factor can also be viewed on hmi screen 3.4.1. Note power factor reads near 0 with a negative sign indicating a lagging power factor angle. Step 4: reverse the current polarity and apply the same values as in step 4. Note that the reactive power reading ...

  • Page 388

    13-12 be1-cds240 testing and maintenance 9365200990 rev f  that the fault reporting settings are properly set such that the relay properly indicates pickup and trip states and records targets. These settings are set from the ascii command interface using the sg-trigger and sg-targ setting commands....

  • Page 389

    Sidebar 13-1. Testing with internal phase and i0 compensation when the internal phase and zero-sequence compensation feature of the be1-cds240 is used, confusing test results can occur unless the compensation is taken into consideration. The best way to illustrate how the be1-cds240 relay performs i...

  • Page 390

    13-14 be1-cds240 testing and maintenance 9365200990 rev f table 13-10. Commands to initiate a differential check record command purpose a= gains write access to the relay. Cs-group=0; co-group=0 override logic and make sure that relay is in setting group 0. Ra-diff=trig; trigger current check record...

  • Page 391

    9365200990 rev f be1-cds240 testing and maintenance 13-15 note: table 13-11 is based on internal angle compensation and not ct compensation. The table also shows one set of input pairs (ct1 and ct2). All tests should be repeated with the other input pairs (ct1- ct3, ct1-ct4, ct2-ct3, ct2-ct4, and ct...

  • Page 392

    Phase differential restrained slope trip this test will verify the percentage restraint characteristic. Since each current input circuit and phase protective element was verified in the preceding test, it is only necessary to test and verify the slope characteristic on one phase element for each set...

  • Page 393

    9365200990 rev f be1-cds240 testing and maintenance 13-17 note: figure 13-3 shows one set of input pairs (i1 and i2). All tests should be repeated with the other input pairs (i1-i3, i1-i4, i2-i3, i2-i4, and i3-i4). Table 13-15. Starting test currents and test connections for slope test angle / i0 co...

  • Page 394

    Table 13-16. Connection terminals for figures 13-4 through 13-11 cds240 terminals reference ct1 ct2 ct3 ct4 x2 a2 a5 a8 a11 x3 a3 a6 a9 a12 x4 a3 a6 a9 a12 x5 a4 a7 a10 a13 x6 a4 a7 a10 a13 x9 a2 a5 a8 a11 x10 a2 a5 a8 a11 x11 a3 a6 a9 a12 x12 a3 a6 a9 a12 x13 a4 a7 a10 a13 x14 a4 a7 a10 a13 note: t...

  • Page 395

    Ia2 x9 x10 ia1 x1 x2 ib2 x11 x12 ib1 x3 x4 ic2 x13 x14 ic1 x5 x6 ia2 x9 x10 ia1 x1 x2 ib2 x11 x12 ib1 x3 x4 ic2 x13 x14 ic1 x5 x6 ia2 x9 x10 ia1 x1 x2 ib2 x11 x12 ib1 x3 x4 ic2 x13 x14 ic1 x5 x6 a b c d2857-28.Vsd 05-05-00 figure 13-6. Test connection diagrams for table 13-15 d2857-29.Vsd 05-05-00 i...

  • Page 396

    Ia2 x9 x10 ia1 x1 x2 ib2 x11 x12 ib1 x3 x4 ic2 x13 x14 ic1 x5 x6 ia2 x9 x10 ia1 x1 x2 ib2 x11 x12 ib1 x3 x4 ic2 x13 x14 ic1 x5 x6 ia2 x9 x10 ia1 x1 x2 ib2 x11 x12 ib1 x3 x4 ic2 x13 x14 ic1 x5 x6 a b c d2857-31.Vsd 05-05-00 figure 13-9. Test connection diagrams for table 13-15 ia2 x9 x10 ia1 x1 x2 ib...

  • Page 397

    Note it is necessary to convert the slope setting from percent to decimal for use in the equations used in step 4-4. Step 4-4: check that the starting (balanced) test current will not result in a minimum pickup trip. Use the appropriate equation under the column heading min pu in figure 13-3. If it ...

  • Page 398

    13-22 be1-cds240 testing and maintenance 9365200990 rev f verify other set points as appropriate consult functional testing in this section of the manual for guidelines on how to test other functions to verify set points of other protection and control functions. Digital i/o connection verification ...

  • Page 399

    Note in verifying output connections, we pulse the hardware outputs for 200 milliseconds. If you have a specific output that requires a longer operate time to verify operation, substitute a 1 or 0 (depending on the output logic) for the p in the commands listed in table 13-17. After the output conne...

  • Page 400

    13-24 be1-cds240 testing and maintenance 9365200990 rev f step 5: obtain write access to the relay by using the access= command. For each virtual selector switch enabled in your logic scheme, change the switch position by entering cs-x43=1 (true), 0 (false) or p (pulse) followed by co-x43=1,0 or p. ...

  • Page 401

    9365200990 rev f be1-cds240 testing and maintenance 13-25 purpose: to set the transformer counter and duty registers as required for the system installation. Reference commands: rt-tfcntr, rt-duty refer to section 6, reporting and alarm functions, transformer monitoring, for setting details. To use ...

  • Page 402

    13-26 be1-cds240 testing and maintenance 9365200990 rev f refer to section 6, reporting and alarm functions, fault reporting, fault summary reports, for information on retrieving fault summary reports. Sequence of events recorder (ser) function reset ser registers and verify that there are no ser ev...

  • Page 403

    Note if the load picked up results in differential current greater than the alarm set point (scenario 3), a record will be generated automatically by the differential alarm function. If this occurs, it is still recommended to manually trigger generation of a new differential check record so that you...

  • Page 404

    Annotated differential check record cds240 differential check record station id : substation_1 relay id : be1-cds240 user1 id : user1_id user2 id : user2_id relay address : 0 report date : 04/24/03 report time : 15:22:22.669 active group : 0 phase 87 settings ctr ct con tx con grounded abc swap diff...

  • Page 405

    In-service current circuit verification form time and date: station id: relay id: user1 id: user2 id: trigger differential check record to trigger and retrieve a current check record, use the following commands: a= ra-diff=trig ra-diff examine differential check record 1. Examine the measurements po...

  • Page 406

    Periodic testing because the relay has extensive internal self-test capabilities, periodic testing of the protection system can be greatly reduced. The relay characteristics are a function of the programming instructions that do not drift over time. Thus, the user may wish to verify that the:  set ...

  • Page 407

    Maintenance of backup battery for real-time clock the backup battery for the real-time clock is an optional feature available in be1 numeric products. A 3.6v, 0.95 ah lithium battery is used to maintain clock function during extended loss of power supply voltage (over eight hours). In mobile substat...

  • Page 408

    Figure 13-13. Location of battery, bottom view care and handling the be1-cds240 current differential system requires no preventive maintenance. The fully numeric design of the relays requires no circuit-board level calibration. There is no need to disturb the circuit interconnections within the asse...

  • Page 409

    Basler electric, then that cd-rom will contain firmware and the corresponding version of bestcoms software. Bestcoms can also be downloaded from the basler electric web site (http://www.Basler.Com). An on line form can be completed to obtain a password for downloading bestcoms from the basler electr...

  • Page 410

    Command purpose sg-ct4=1,wye,na ctr = 1, ct = wye, xfmr = na. Sg-trigger=87rt, 7rpu,0 enable 87rt to log and trigger fault recording. E exit. Y save settings. Step 3: send to the relay the commands listed in table 13-19. Note the tap settings listed in the s#-tap87 command are within the range of se...

  • Page 411

    Table 13-20. Sensing input type accuracy ct secondary rating accuracy 5 a 4% of setting or 75 milliamperes whichever is greater. 1 a 4% of setting or 25 milliamperes whichever is greater. Step 6: decrease the phase a, input 1 current until the relay drops out. Remove current. Note testing all inputs...

  • Page 412

    Note the action listed in step 8 will not be introduced again in these tests. It is up to the user to decide whether it is necessary to do this check after each test. Step 9: (optional.) repeat steps 2 through 8 for setting groups 1 through 3. Use the cs/co-group command to change setting groups. St...

  • Page 413

    9365200990 rev f be1-cds240 testing and maintenance 13-37 sidebar 13-2. Percentage differential restraint operating principle the percentage differential restraint characteristic of the be1-cds240 relay is illustrated in section 1, figure 1-1. The knee of the operating curve for any slope setting is...

  • Page 414

    Sidebar 13-3. Maximum restraint operating characteristic under maximum restraint, the relay will reach the trip or operate point depending on the level of restraint as shown in the associated figure. When only one current is changed, the restraint current can vary depending on the relative changes b...

  • Page 415

    Sidebar 13-3. Maximum restraint operating characteristic – continued under test and in-service conditions, the following equations determine whether the relay operates along the flat minimum pickup or slope of the operating characteristic. If: i restraint at balance > minpu x  1 100 / slope 1 in pe...

  • Page 416

    You may also use the maximum restraint operating characteristic and test the relay by decreasing one current from a balanced condition. For additional information on testing in this manner, see sidebar 13-4. Sidebar 13-4. Maximum restraint when decreasing one input from balance a second way to test ...

  • Page 417

    9365200990 rev f be1-cds240 testing and maintenance 13-41 table 13-25. Maximum restraint pickup test points (5 a sensing input) input 1 input 2 tap = 2.00 tap = 3.80 sensing input type minimum pickup slope (%) bal. Input (a) pu bal. Input (a) pu increasing input 1 from balance pickup (a) decreasing ...

  • Page 418

    If you are applying this relay using the average restraint operating characteristic, you may begin your testing at step 12. Otherwise, go back to step 4 to test for the maximum restraint operating characteristic. For more information on testing using the average restraint operating characteristic, s...

  • Page 419

    Sidebar 13-6. Average restraint when increasing one input from balance - continued example (increasing one input from balance): tap1 = 2.00 minpu = 0.30 tap2 = 3.80 slope = 15% input 1 current at balance = 3 per unit (6 amperes) input 2 current at balance = 3 per unit (11.40 amperes) input 1 is bein...

  • Page 420

    You may also use the average restraint operating characteristic and test the relay by decreasing one current from a balanced condition. For additional information on testing in this manner, see sidebar 13-7. Sidebar 13-7. Average restraint when decreasing one input from balance a second way to test ...

  • Page 421

    9365200990 rev f be1-cds240 testing and maintenance 13-45 table 13-29. Average restraint pickup test points (5 a sensing input) input 1 input 2 tap = 2.00 tap = 3.80 sensing input type minimum pickup slope (%) bal. Input (a) pu bal. Input (a) pu increasing input 1 from balance pickup (a) decreasing ...

  • Page 422

    Step 19: for each indicated change in slope value, send the commands listed in table 13-31 to the relay to invoke a change in slope settings (notice the leading comma (,) in the s#-87 command). Table 13-31. Setup commands command purpose a= gain access. S#-87=,30 minpu = no change, slope = 30%. E ex...

  • Page 423

    9365200990 rev f be1-cds240 testing and maintenance 13-47 command purpose sl-vo1=87rt enables out1 to close with 87 restrained trip. Sg-ct1=1,wye,na,0 ctr = 1, ct = wye, xfmr = na, no grd source. Sg-ct2=1,wye,na,0 ctr = 1, ct = wye, xfmr = na, no grd source. Sg-ct3=1,wye,na,0 ctr = 1, ct = wye, xfmr...

  • Page 424

    Second harmonic restraint verification purpose: to verify the operation of the 2 nd harmonic restraint function of the 87 element. Reference commands: sl-87, s(n)-87, s(n)-tap87, sl-vo, sg-ct. Step 1: parallel a 60 hz current source and a second 120 hz current source to terminals a3, a4 (a-phase, in...

  • Page 425

    Command purpose s#-87=0.35,15,18,0,0,1 minpu = 0.35, slope = 15% ,2 nd = 18%, 5 th = disabled, uro = disabled, 2 nd harmonic sharing = shared. E exit. Y save settings. Step 3: apply 2.0 amps of 60 hz current to the a-phase input 1. The out1 (87rt restrained trip) output contact should close upon app...

  • Page 426

    Command purpose sg-ct2=1,wye,na,0 ctr = 1, ct = wye, xfmr = na, no ground source. Sg-ct3=1,wye,na,0 ctr = 1, ct = wye, xfmr = na, no ground source. Sg-ct4=1,wye,na,0 ctr = 1, ct = wye, xfmr = na, no ground source. Sg-trigger=87rt,87rpu,0 enable 87rt to log and trigger fault recording. S#-tap87=manua...

  • Page 427

    9365200990 rev f be1-cds240 testing and maintenance 13-51 command purpose sg-trigger=87ut,87ut,0 enable 87ut to log and trigger fault recording. S#-tap87=manual,2.00,3.80 set tap 1 = 2.00 and tap 2 = 3.80. S#-87=0,15,0,0,0,1 minpu = disabled, slope = 15%, 2 nd = disabled, 5 th = disabled, uro = disa...

  • Page 428

    13-52 be1-cds240 testing and maintenance 9365200990 rev f command purpose s#-tap87=manual,2.00,2.00 set tap 1 = 2.00 and tap 2 = 2.00. S#-87=0,15,0,0,2,1 minpu = 0, slope = 15%, 2 nd = disabled, 5 th = disabled, uro = 2 times tap unrestrained pickup, 2 nd harm sharing = shared. E exit. Y save settin...

  • Page 429

    Figure 13-17. Connection for 87nd minimum pickup verification (only inputs 1 and 2 are shown for simplicity) step 2: to prepare the 87nd elements for testing, transmit the commands in table 13-40 to the relay. Table 13-40. 87nd pickup test commands command purpose a= gain access. Sl-n=none zero out ...

  • Page 430

    13-54 be1-cds240 testing and maintenance 9365200990 rev f sidebar 13-9. Auto tap compensation tap adjustment factors for the 87nd function are automatically calculated based on the equation: tapn * ctrn = tapg * ctrg where ctrn is the ct ratio for the ct designated in the sl-x87nd setting in the act...

  • Page 431

    Figure 13-18. Connection for 87nd restraint pickup verification (only inputs 1 & 2 are shown for simplicity) step 2: to prepare the x87nd element for testing the restraint operation accuracy, transmit the commands in table 13-42 to the relay. Table 13-42. 87nd restraint operation accuracy test comma...

  • Page 432

    Step 4: input current values for this step are provided in table 13-43 or 13-44. Apply balancing current to phase a input 2 (represented as the neutral column) and the ground input as indicated in each row and slowly increase phase a input 2 until out1 closes. Step 5: remove both currents. Step 6: v...

  • Page 433

    9365200990 rev f be1-cds240 testing and maintenance 13-57 table 13-44. Restraint pickup test points (87nd – 1 ampere sensing input) input 1 input 2 tap = 2.00 tap = 3.80 sensing input type minimum pickup slope (%) bal. Input (a) pu bal. Input (a) pu increasing input 1 from balance pickup (a) decreas...

  • Page 434

    Table 13-46. Instantaneous 50t element test values sensing input type phase negative-sequence neutral comments s0-50tp=0.5,0 s0-50tq=0,0 s0-50tn=0.5,0 note 1 s0-50tp=5.0,0 s0-50tq=1.67,0 s0-50tn=5.0,0 note 2 5 a s0-50tp=25.0,0 s0-50tq=8.33,0 s0-50tn=25.0,0 note 2 s0-50tp=0.1,0 s0-50tq=0,0 s0-50tn=0....

  • Page 435

    Table 13-49. Instantaneous overcurrent 250t/350t/450t/550t/650t/750t element test logic replace these commands with these commands for x50t element tests (where x = 3,4,5,6,7) sl-50t=1,0 sl-x50t = 1,0 sl-vo1=50tpt sl-vo1 = x50tpt sl-vo2=50tnt sl-vo2 = x50tnt sl-vo3=50tqt sl-vo3 = x50tqt sg-targ=50t ...

  • Page 436

    These sequence component quantities are very useful in that they can be measured and used as operating parameters to help safeguard equipment. Proper management of the power system conserves resources and minimizes potentially harmful exposure to the public and operating personnel. Using symmetrical...

  • Page 437

    Step 4: slowly ramp up current on the phase a input until out1, out2, and out3 close. Verify that pickup occurred within the specified accuracy of the relay as listed in table 13-52. Table 13-52. Time overcurrent 51 element accuracy sensing type pickup accuracy - phase and neutral a or b (1 ampere n...

  • Page 438

    13-62 be1-cds240 testing and maintenance 9365200990 rev f to change from setting group 0 to setting group 1, execute the following commands: cs-group=1 select setting group 1 co-group=1 execute setting group 1 using the basic information in table 13-50, program the pickup of the elements for setting...

  • Page 439

    Step 5: after each pickup occurs, slowly ramp current down until out1, out2, and out3 open. Dropout should occur at 95% 2%. Table 13-57. Time overcurrent 51 element test values relay trip sensing input type time dial applied current lower limit higher limit 1.50 a 0.748 sec 0.827 sec 0.5 5.00 a 0.19...

  • Page 440

    13-64 be1-cds240 testing and maintenance 9365200990 rev f appendix c, overexcitation (24) inverse time curves) and two definite time characteristics. Note that v/hz nominal is 69.3 volts (phase to neutral) x square root 3/60 hz, or 2.001. That is, at nominal voltage and frequency (60 hz system) 1 pu...

  • Page 441

    9365200990 rev f be1-cds240 testing and maintenance 13-65 step 10: (optional.) repeat steps 2 through 9 for setting group 1. Step 11: using table 13-60 as a guide, transmit the setting commands to the relay. Table 13-60. Alarm, integrating time, and definite time pickup settings (step 11) command pu...

  • Page 442

    13-66 be1-cds240 testing and maintenance 9365200990 rev f step 1: using table 13-63 as a guide, transmit the setting commands to the relay. Table 13-63. V/hz reset time pickup settings settings purpose s0-24=2.1,0.5,0.2,2.0 sets 24 pu at 1.05% of nominal (2.10 v/hz), trip time dial = 0.5, reset time...

  • Page 443

    9365200990 rev f be1-cds240 testing and maintenance 13-67 table 13-66. Definite time (24d) v/hz trip times percent of nominal v/hz minimum time delay second time delay third time delay 118% 0.50 seconds 5 seconds 20 seconds step 4: (optional.) repeat steps 2 through 4 for the b-phase and c-phase vol...

  • Page 444

    13-68 be1-cds240 testing and maintenance 9365200990 rev f step 5: slowly decrease the a-phase voltage until out1 closes. Pickup should occur within +2 percent or 1 volt of the 27 pickup setting. Slowly increase the a-phase voltage until out1 opens. Dropout should occur between 102 and 103 percent of...

  • Page 445

    9365200990 rev f be1-cds240 testing and maintenance 13-69 command purpose y confirm overwrite. Sl-n=47 sets 47 as custom logic name. Sl-27=0 disables 27. Sl-59=0 disables 59. Sl-47=1,0 enables 47, disables blocking. Sp-60fl=ena,pn removes 60fl block from 47 element. Sl-vo1=47t enables out1 to close ...

  • Page 446

    13-70 be1-cds240 testing and maintenance 9365200990 rev f step 6: (optional.) repeat steps 2 through 5 for the b-phase and c-phase voltage inputs. Step 7: (optional.) repeat steps 2 through 6 for setting groups 1, 2, and 3. Over/underfrequency (81/181/281/381/481/581) purpose: to verify the operatin...

  • Page 447

    9365200990 rev f be1-cds240 testing and maintenance 13-71 step 5: slowly decrease the frequency of the applied voltage until out3 (281) closes. Pickup should occur within +0.01 hertz of the pickup setting. Slowly increase the frequency until out3 opens. Dropout should occur at 0.02 hertz above or be...

  • Page 448

    13-72 be1-cds240 testing and maintenance 9365200990 rev f step 1: prepare the 50bf function block for testing by transmitting the commands in table 13-76 to the relay. Table 13-76. 50bf, bfi52 contact initiate test commands command purpose a= gain write access sl-n=none zero out custom logic setting...

  • Page 449

    9365200990 rev f be1-cds240 testing and maintenance 13-73 command purpose sl-vo2=bfrt1 enables out2 to close for bf retrip 1. Sa-lgc=5 set logic alarm to bf1 alarm (#5). Sl-vo3=almlgc enables out3 to close for bf1 alarm. Sg-ct=1,wye,na,0 input 1 ctr = 1, ct = wye, xfmr = n/a, no ground source. Sg-tr...

  • Page 450

    13-74 be1-cds240 testing and maintenance 9365200990 rev f command purpose exit exit. Y save settings. Step 12: verify the bf time delay by applying nominal current for the duration given in the following steps: 1. Apply nominal current to phase a for 4 cycles (67 ms at 60 hz). No trip should occur. ...

  • Page 451

    9365200990 rev f be1-cds240 testing and maintenance 13-75 table 13-82. Mode 1 test commands command purpose a= gains write access. Sl-n=none zero out custom logic settings. Overwrite with logic = none settings. Y confirm overwrite. Sl-n=mode1 sets mode1 as custom logic name. Sl-43=1 sets 43 to mode ...

  • Page 452

    13-76 be1-cds240 testing and maintenance 9365200990 rev f step 1: prepare for mode 2 testing by transmitting the commands in table 13-86 to the relay. Table 13-86. Mode 2 test commands command purpose a= gains write access. Sl-n=none zero out custom logic settings. Overwrite with logic = none settin...

  • Page 453

    9365200990 rev f be1-cds240 testing and maintenance 13-77 command purpose sl-n=mode3 sets mode3 as custom logic name. Sl-243=3 sets 243 to mode 3 operation. Sl-vo1=243 enables out1 to close for 243. Y save settings. Step 2: prepare to monitor the virtual switch operation. Step 3: send the commands i...

  • Page 454

    13-78 be1-cds240 testing and maintenance 9365200990 rev f table 13-92. 101 virtual breaker control switch trip test commands command purpose a= gains write access. Cs-101=t selects 101t for trip operation. Co-101=t executes 101t for trip operation. Step 4: send the commands in table 13-93 to the rel...

  • Page 455

    9365200990 rev f be1-cds240 testing and maintenance 13-79 table 13-95. 101 virtual breaker control switch trip test commands command purpose a= gains write access. Cs-x101t=t selects x101t for trip operation. Co-x101t=t executes x101t for trip operation. Step 8: send the commands in table 13-96 to t...

  • Page 456

    Table 13-98. X62 mode 1 timer initiate commands command purpose a= gains write access. Cs-43=1 selects 43 for close operation. Co-43=1 executes 43 for close operation. Step 3: send the commands in table 13-99 to the relay. These commands will remove the initiate input from the 62 timer by changing t...

  • Page 457

    Step 2: send the commands in table 13-101 to the relay. These commands supply the 162 timer with a momentary initiate input by pulsing the 143 switch from a false state to a true state and then back to a false state. You may view the state changes of the 143 switch at front panel interface \ctrl\43\...

  • Page 458

    Command purpose sn-343=62_ini,ini,normal name switch to make ser easier to read. Sl-62=3,343,0 enables 62 1-shot, retriggerable mode, 343 initiate, no blocking. S0-62=15s,20s sets 62 delay at 15 seconds, 62 dropout at 20 seconds. Exit exit. Y save settings. Step 2: send the commands in table 13-103 ...

  • Page 459

    200 ms 200 ms 200 ms t1 t2 t1 t1 t2 ~~ 343 162 ini 1 normal 0 d2595-04.Vsd 08-10-00 ~ ~ ~ ~ ~ ~ figure 13-21. X62 mode 3 (one-shot retriggerable) timing example mode 4 - oscillator because this operating mode is not intended for general use, no testing procedure is provided. Information about mode 4...

  • Page 460

    Command purpose wait at least 5 seconds for the t2 timer to time out and reset the integration. Cs-43=1 selects 43 for true operation. Co-43=1 executes 43 for true operation. Wait at least 20 seconds for the t1 timer to elapse. E exit. Step 3: use the rs-lgc command to obtain an ser report and verif...

  • Page 461

    Command purpose sl-62=6,43,143 enables 62 latch mode, 43 initiate, 143 block (reset latch). S0-62=30s sets t1 at 30 seconds, t2 time not applicable. Exit exit. Y save settings. Step 2: sent the commands in table 13-107 to the relay. These commands supply a latch input to the 62 timer by changing the...

  • Page 462

    13-86 be1-cds240 testing and maintenance 9365200990 rev f step 4: (optional.) repeat the 62 timer tests for modes 1, 2, 3, and 5 for setting groups 1, 2, and 3. Step 5: repeat the 62 time tests for each 62 element (62/162/262/362). Automatic setting group change automatic change purpose : to verify ...

  • Page 463

    Command purpose sp-group3=1,110,1,100,51p sg3 t s =1 min @ 110%, t r = 1 min @ 100% of sg0 51p. E exit. Y save settings. Step 3: switch group control to automatic using virtual switch 443. Use table 13-109 ascii commands or front panel interface \ctrl\43\543, screen 2.1.6. Table 13-109. Automatic gr...

  • Page 464

    13-88 be1-cds240 testing and maintenance 9365200990 rev f table 13-111. Automatic setting group change example accuracy limits - increasing current current value sensing type above switch threshold but below next group switch threshold and 51p pu time comments 0.51 a 0.73 a - starting point 50% of s...

  • Page 465

    9365200990 rev f be1-cds240 testing and maintenance 13-89 current value sensing type below switch timing threshold but above next group switch threshold time comments 10.78 a 5.61 a > 1 min sg3 (110% sg0 51p). 4.9 a 4.4 a > 1 min switch to sg2 (100% sg0 51p). 4.16 a 3.57 a > 1 min switch to sg1 (85%...

  • Page 466

    13-90 be1-cds240 testing and maintenance 9365200990 rev f command purpose cs-43=1 selects setting group 0 for operation. Co-43=1 executes setting group 0 for operation. Cs-43=0 deselects setting group 0 for operation. Co-43=0 executes deselecting setting group 0 for operation. Cs-243=1 selects setti...

  • Page 467

    9365200990 rev f be1-cds240 testing and maintenance 13-91 command purpose co-43=0 executes deselecting setting group 1 for operation. Cs-143=1 selects setting group 2 for operation. Co-143=1 executes setting group 2 for operation (d1=1). Cs-43=1 selects setting group 3 for operation. Co-43=1 execute...

  • Page 468

    13-92 be1-cds240 testing and maintenance 9365200990 rev f this page intentionally left blank..

  • Page 469: Section 14

    9365200990 rev f be1-cds240 bestcoms software i section 14  bestcoms software table of contents section 14  bestcoms software .............................................................................................. 14-1 description................................................................

  • Page 470

    Ii be1-cds240 bestcoms software 9365200990 rev f figure 14-12. General operation screen, hmi display tab ................................................................. 14-10 figure 14-13. General operation screen, conversions tab................................................................. 14...

  • Page 471: Section 14

    9365200990 rev f be1-cds240 bestcoms software 14-1 section 14  bestcoms software description bestcoms is a windows based program that runs on an ibm compatible computer and provides a user friendly, graphical user interface (gui) for use with basler electric communicating products. Bestcoms is an a...

  • Page 472

    Figure 14-1. Typical user interface components installation bestcoms for be1-cds240 software contains a setup utility that installs the program on your pc. (this is typical for all of the be1 numerical systems.) when it installs the program, an uninstall icon (in the control panel, add/remove progra...

  • Page 473

    Updating bestcoms software future enhancements to relay functionality may make firmware update desirable. Enhancements to relay firmware typically coincide with enhancements to bestcoms software for that relay. When a relay is updated with the latest version of firmware, the latest version of bestco...

  • Page 474

    Figure 14-3. System setup summary screen, protection and control tab reporting and alarms this second tab of the system setup summary screen (figure 14-4) provides the remaining summary information for the relay in regard to monitoring, metering, and alarms. Again, a legend for the color- coding of ...

  • Page 475

    Configuring the pc if you have an actual be1-cds240 relay, configure your pc to match the be1-cds240 configuration. To do this, pull down the communication menu in the pull-down menu and select configure. Now, match the communication configuration in the be1-cds240 relay. You may select terminal (vt...

  • Page 476

    Figure 14-5. General operation screen, general info tab identification this screen (figure 14-6) allows you to fill in the serial number of the relay and the various software and firmware application version information. Additionally, you may enter the name of the relay, substation identification, a...

  • Page 477

    Power system/vt setup this screen (figure 14-7) allows you to enter the nominal frequency, normal phase rotation, nominal secondary voltage and current, and vtp parameters. If the phase rotation entry is not correct, it will cause problems in several areas including metering values and targets. In o...

  • Page 478

    Figure 14-8. General operation screen, ct setup tab transformer setup this screen (figure 14-9) allows you to set up the circuit configurations for four transformers circuits and two virtual circuits. Connection types, differential circuit, and transformer phase relationships can be set using pull-d...

  • Page 479

    Global security this screen (figure 14-10) allows you to set up password security. Each of three communication ports and the four functional areas (global, settings, reports, and control) are protected with password security. This allows the user to customize password protection for any or all ports...

  • Page 480

    Figure 14-11. General operation screen, communication tab hmi display the human-machine interface (hmi) screen (figure 14-12) allows the user to change the screen scroll list. Only the code for the latest version of bestcoms is contained within bestcoms. If you have an earlier version of the embedde...

  • Page 481

    Conversions the conversions tab (figure 14-13) brings up the screen that allows entries in per unit. The per unit conversion for the settings involves entries for the base quantities. When you are entering settings later on, you can select primary current values, secondary current values, percent, o...

  • Page 482

    Figure 14-14. Setting group selection screen percentage differential pull down the screens menu and select percentage differential or click on the percentage differential icon that is shown at the right margin of this paragraph. This screen has three folder tabs and the first tab is 87 phase. 87 pha...

  • Page 483

    Figure 14-15. Percentage differential screen, 87 phase tab 87nd/187nd the 87nd/187nd tab (figure 14-16) brings up the screen that allows setting the 87 neutral differential. Restrained pickup is adjusted using the pull-down menu with times tap as the default. Other options include input 1-4 amps and...

  • Page 484

    Diff alarm the diff alarm tab (figure 14-17) brings up a screen that allows setting the percentage of differential characteristic. The default value is 67% but the permissible range is 50 to 100. Figure 14-17. Percentage differential screen, diff alarm tab overcurrent protection pull down the screen...

  • Page 485

    Figure 14-18. Overcurrent screen, 51 tab 151/251 and 351/451 tabs these two screen tabs allow you to enter the settings for the 151/251 and 351/451 time overcurrent elements. They are configured the same as on the 51 tab. 50t/150t be1-cds240 relays have eight instantaneous overcurrent elements with ...

  • Page 486

    250t/350t, 450t/550t and 650/750t tabs these three screen tabs allow you to enter the settings for the 250t, 350t, 450t, 550t, 650t, and 750t time overcurrent elements with settable time delay elements. They are configured as explained above. Voltage protection pull down the screens menu and select ...

  • Page 487

    Opens showing the status of the element logic and the logic scheme name. If you have a custom logic scheme active, you may change the status of the element logic by pulling down the menu and selecting from the available choices. Figure 14-21. Voltage protection screen, 27p/127p tab 47 this tab (figu...

  • Page 488

    59p/159p this tab (figure 4-23) is the phase overvoltage with settable time delay. Changing the settings for this element is similar to those settings of the 27p/127p elements above. Figure 14-23. Voltage protection screen, 59p/159p tab 59x this tab (figure 4-24) is the auxiliary overvoltage protect...

  • Page 489

    Inh/81/181/281/381/481/581 this tab (figure 4-25) is the o/u frequency with settable time delay. Changing the settings for these elements are similar to those settings of the 27p/127p elements above. Figure 14-25. Voltage protection screen, inh/81/181/281/381/481/581 breaker failure pull down the sc...

  • Page 490

    Figure 14-26. Breaker failure screen, 50bf tab 150bf, 250bf, 350bf tabs these three tabs are for setting the 150 breaker failure, 250 breaker failure, and 350 breaker failure elements. Changing the settings for these elements are identical to those of the 50bf element above. Logic timers pull down t...

  • Page 491

    62/162/262/362 logic timers, 62, 162, 262, and 362 are general-purpose timers with six operating modes. Each operating mode has a t1 and t2 setting. The function of these settings depends on the type of timer (mode) selected. For a description of the setting functions, see section 4, protection and ...

  • Page 492

    Figure 14-29. Reporting and alarms screen, i demand tab v & p demand the long title for this screen is voltage and power demand metering and alarms (figure 14-30). Using the pull-down menu, select sec. Volts, per u volts, or % volts as the phase & average voltage threshold unit of measure. Then by u...

  • Page 493

    Vt monitor the long title for this screen is fuse loss block logic (figure 14-31). Fuse loss block logic can prevent misoperation on loss of sensing voltage. This can be applied on both the 51/27 (voltage control) and 27/59 functions. When the 51/27 function is set for control and a 60fl condition i...

  • Page 494

    Figure 14-32. Reporting and alarms screen, bkr duty tab bkr status the long title for this screen is circuit x breaker status (figure 14-33) where x equals circuit 1, 2, 3, or 4. Circuit breaker labels can be tailored to meet user-defined needs by entering the new label in the breaker name box. If d...

  • Page 495

    Bkr alarms the long title for this screen is breaker alarms (figure 14-34). Twelve alarms can annunciate events involving up to four circuits (circuit 1-4). For each alarm (alarm 1 -12), the mode, circuit number, and threshold can be set. The pull down arrows will allow the mode to be selected as di...

  • Page 496

    Figure 14-35. Reporting and alarms screen, transformer monitoring tab alarms be1-cds240 relays have 71 programmable alarm points (figure 14-36). These points are for the monitored power system, associated equipment, and non-core circuits and functions in the relay. Each of these alarm points can be ...

  • Page 497

    Fault recording logic expressions define the three conditions that determine when a fault has occurred. If a fault is detected by the relay, the relay records (stores in memory) data about the fault. The three conditions that determine a fault are trip, pick up, and logic trigger. To define these co...

  • Page 498

    Inputs and outputs pull down the screens menu and select inputs and outputs or click on the inputs and outputs icon that is shown at the right margin of this paragraph. This screen has three folder tabs and the first tab is inputs 1 - 6. Inputs 1 - 6 six programmable inputs in the be1-cds240 relay a...

  • Page 499

    Figure 14-39. Inputs and outputs screen, outputs 1 - 14, a tab virtual switches pull down the screens menu and select virtual switches or click on the virtual switches icon that is shown at the right margin of this paragraph. This screen has three folder tabs and the first is 43-143-243-343. 43-143-...

  • Page 500

    The virtual breaker control switch provides manual control of a circuit breaker or switch without using physical switches and/or interposing relays. The mode logic setting for virtual switch 43 can be made by clicking on the bestlogic button. With your custom logic selected, select the mode logic by...

  • Page 501

    Misc dnp settings. The right pane is used to set the pre transfer delay time and the synchronization period time. Figure 14-42. Dnp settings screen, dnp settings tab analog class & dead band this tab (figure 14-43) allows the user to edit analog dnp points. Using normal windows techniques, place a b...

  • Page 502

    Binary class this tab (figure 14-44) allows the user to edit binary dnp points. Using normal windows techniques, place a bullet next to the point range you wish to edit. Using the pull-down menus for class, select 0, 1, 2, or 3. Figure 14-44. Dnp settings screen, binary class tab bestlogic pull down...

  • Page 503

    Figure 14-45. Bestlogic screen, logic select tab virtual outputs you can assign a meaningful name or label to each virtual output. This makes sequential events reports easier to analyze. To assign a meaningful label to a virtual output (figure 14-46), click in the label field and enter the new name....

  • Page 504

    Physical outputs to change the logic on a physical output (figure 14-47), click on the bestlogic button associated with outx. Click on the logic input and program the logic variables that define outa and out1 through out14. Note: the cds-240 relay can have either 10 or 14 hardware output contacts de...

  • Page 505

    Function elements not all of the logic functions have bestlogic labeled on the button (figure 14-48). If the logic function is labeled logic and not bestlogic, the ascii command for the function is not prefixed with sl-. For example: breaker status is a function of breaker monitoring and the ascii c...

  • Page 506

    Copying settings from group to group there are a lot of settings in any be1-numerical systems product and the differences between group 0 and any other group settings may be minimal. It would be convenient if there were a way to copy settings from group 0 to another group and then just change only t...

  • Page 507

    Downloading oscillography files to download an oscillography file, pull down the reports menu from the pull-down menu as shown in figure 14-52 and select oscillography download. When you select this choice, you may get a communication error if you are not configured to an actual relay. If you have c...

  • Page 508

    View fault details to view the fault record details, select an event by clicking on the event number or anywhere on the event line. The event grays-out while the information is being retrieved from the relay. View the fault details in the associated window. View fault sequence of events to view the ...

  • Page 509

    File management in these paragraphs, file management describes saving, opening, uploading, downloading, printing, and comparing settings files. Saving a settings file if you change any settings in the active custom logic scheme and try to exit bestcoms, the dialog box shown in figure 14-55 appears. ...

  • Page 510

    You may also export the settings file to a text file. Pull down the file menu and select export to text. A dialog box, export to text file opens with the settings file shown. Execute the ok command and then use normal windows techniques to select the path. Execute the save command and you now have a...

  • Page 511

    9365200990 rev f be1-cds240 bestcoms software 14-41 bestprint bestprint, which is found on the cd included with the be1-cds240 relay, will preview and print basler electric relay settings files. This is via graphic representations similar to what is seen in the bestcoms software application. Bestpri...

  • Page 512

    14-42 be1-cds240 bestcoms software 9365200990 rev f this page intentionally left blank..

  • Page 513: Appendix A

    9365200990 rev f be1-cds240 time overcurrent characteristic curves i appendix a  time overcurrent characteristic curves table of contents appendix a • time overcurrent characteristic curves ................................................... A-1 general ................................................

  • Page 514

    Ii be1-cds240 time overcurrent characteristic curves 9365200990 rev f this page intentionally left blank..

  • Page 515: Characteristic Curves

    Appendix a • time overcurrent characteristic curves general basler electric inverse time overcurrent systems (ansi device 51) provide time/current characteristic curves that very closely emulate most of the common electro-mechanical, induction disk relays that were manufactured in north america. To ...

  • Page 516

    A-2 be1-cds240 time overcurrent characteristic curves 9365200990 rev f table a-1. 51p, 51n, and 51q time characteristic curve constants trip characteristic constants § reset † curve selection curve name a b c n k r s1 s, s1, short inverse 0.2663 0.03393 1.0000 1.2969 0.0280 0.5000 s2 s2, short inver...

  • Page 517

    9365200990 rev f be1-cds240 time overcurrent characteristic curves a-3 table a-2. Characteristic curve cross-reference curve curve name similar to s1 s, s1, short inverse abb co-2 s2 s2, short inverse ge iac-55 l1 l, l1, long inverse abb co-5 l2 l2, long inverse ge iac-66 d d, definite time abb co-6...

  • Page 518

    In applications where the time coordination between curves is extremely close, we recommend that you choose the optimal time dial setting by inspection of the coordination study. In applications where coordination is tight, it is recommended that you retrofit your circuits with basler electric elect...

  • Page 519

    When curve 46 is selected, the relay changes the range of the allowed time dial to 1 to 99 (instead of the time dial range of 0.1 to 9.9 for all the other curves). The user should enter the “k” factor of the generator into the time dial field. Relay equation when the 46 function is used, the relay u...

  • Page 520

    Figure a-1. Time characteristic curve s, s1, short inverse (similar to abb co-2) a-6 be1-cds240 time overcurrent characteristic curves 9365200990 rev f.

  • Page 521

    9365200990 rev f be1-cds240 time overcurrent characteristic curves a-7 figure a-2. Time characteristic curve s2, short inverse (similar to ge iac-55).

  • Page 522

    A-8 be1-cds240 time overcurrent characteristic curves 9365200990 rev f figure a-3. Time characteristic curve l, l1, long inverse (similar to abb co-5).

  • Page 523

    Figure a-4. Time characteristic curve l2, long inverse (similar to ge iac-66) 9365200990 rev f be1-cds240 time overcurrent characteristic curves a-9.

  • Page 524

    Figure a-5. Time characteristic curve d, definite time (similar to abb co-6) a-10 be1-cds240 time overcurrent characteristic curves 9365200990 rev f.

  • Page 525

    Figure a-6. Time characteristic curve m, moderately inverse (similar to abb co-7) 9365200990 rev f be1-cds240 time overcurrent characteristic curves a-11.

  • Page 526

    Figure a-7. Time characteristic curve i, i1, inverse time (similar to abb co-8) a-12 be1-cds240 time overcurrent characteristic curves 9365200990 rev f.

  • Page 527

    Figure a-8. Time characteristic curve i2, inverse time (similar to ge iac-51) 9365200990 rev f be1-cds240 time overcurrent characteristic curves a-13.

  • Page 528

    Figure a-9. Time characteristic curve v, v1, very inverse (similar to abb co-9) a-14 be1-cds240 time overcurrent characteristic curves 9365200990 rev f.

  • Page 529

    Figure a-10. Time characteristic curve v2, very inverse (similar to ge iac-53) 9365200990 rev f be1-cds240 time overcurrent characteristic curves a-15.

  • Page 530

    Figure a-11. Time characteristic curve e, e1, extremely inverse (similar to abb co-11) a-16 be1-cds240 time overcurrent characteristic curves 9365200990 rev f.

  • Page 531

    Figure a-12. Time characteristic curve e2, extremely inverse (similar to ge iac-77) 9365200990 rev f be1-cds240 time overcurrent characteristic curves a-17.

  • Page 532

    Figure a-13. Time characteristic curve a, standard inverse a-18 be1-cds240 time overcurrent characteristic curves 9365200990 rev f.

  • Page 533

    Figure a-14. Time characteristic curve b, very inverse 9365200990 rev f be1-cds240 time overcurrent characteristic curves a-19.

  • Page 534

    Figure a-15. Time characteristic curve c, extremely inverse a-20 be1-cds240 time overcurrent characteristic curves 9365200990 rev f.

  • Page 535

    Figure a-16. Time characteristic curve g, long time inverse 9365200990 rev f be1-cds240 time overcurrent characteristic curves a-21.

  • Page 536

    Figure a-17. 46 time characteristic curve note: curves are shown as extending farther to the left than they will in practice. Curves stop at pickup level. For example, if the user selects 5a flc and a pickup setting of 0.5a, the per-unit pickup is 0.1a. The relay will not pick up at less than 0.1 pu...

  • Page 537: Inverse Time Curves

    9365200990 rev f be1-cds240 overexcitation (24) inverse time curves i appendix b • overexcitation (24) inverse time curves table of contents appendix b  overexcitation (24) inverse time curves .......................................................B-1 general ..........................................

  • Page 538

    Ii be1-cds240 overexcitation (24) inverse time curves 9365200990 rev f this page intentionally left blank..

  • Page 539: Time Curves

    Appendix b • overexcitation (24) inverse time curves general this appendix contains the inverse time curves for the overexcitation element (24). Equations b-1 and b- 2 represent the trip time and reset time for constant volts per hertz level. Normally, the v/hz pickup is set to a value greater than ...

  • Page 540

    0.1 1.0 10.0 100.0 1000.0 10000.0 100% 110% 120% 130% 140% 150% 160% 170% 180% 190% 200% percent of nominal v/hz tr ip t im e (s e c onds ) 9.9 5.0 2.0 1.0 0.5 0.2 0.1 d1089-12 03-03-04 figure b-1. Volt/hz characteristic (m-1)^0.5 – time on vertical axis 100% 110% 120% 130% 140% 150% 160% 170% 180% ...

  • Page 541

    0.1 1.0 10.0 100.0 1000.0 10000.0 100% 110% 120% 130% 140% 150% 160% 170% 180% 190% 200% percent of nominal v/hz tr ip t im e (seco nd s) 9.9 5.0 2.0 1.0 0.5 0.2 0.1 d1089-14 03-03-04 figure b-3. Volt/hz characteristic (m-1)^1 – time on vertical axis 100% 110% 120% 130% 140% 150% 160% 170% 180% 190%...

  • Page 542

    0.1 1.0 10.0 100.0 1000.0 10000.0 100% 110% 120% 130% 140% 150% 160% 170% 180% 190% 200% percent of nominal v/hz tr ip t im e (s ec onds ) 9.9 5.0 2.0 1.0 0.5 0.2 0.1 d1089-16 03-03-04 figure b-5. Volt/hz characteristic (m-1)^2 – time on vertical axis 100% 110% 120% 130% 140% 150% 160% 170% 180% 190...

  • Page 543: Appendix C

    9365200990 rev f be1-cds240 terminal communication i appendix c  terminal communication table of contents appendix c  terminal communication.......................................................................................C-1 windows 2000/xp ......................................................

  • Page 544

    Ii be1-cds240 terminal communication 9365200990 rev f this page intentionally left blank..

  • Page 545: Appendix C

    Appendix c  terminal communication windows 2000/xp hyperterminal (provided with windows 2000/xp) or other stand-alone software can be used to communicate with a be1-cds240 relay. The following instructions are used for configuring hyperterminal in windows 2000/xp to communicate with your be1-cds240...

  • Page 546

    Figure c-2. Connect to dialog box step 6: dialog box: comx properties a. Make the following selections using figure c-3 as a guide: set the bits per second setting so that it matches the setting of the relay. The default baud rate of the relay is 9,600. Set the data bits at 8. Set the parity to none...

  • Page 547

    Step 7: click file/properties on the menu bar. Click the settings tab. A. Make the following selections using figure c-4 as a guide: check the terminal keys radio button. Select vt-100 emulation. Set backscroll buffer lines to the maximum setting of 500. Figure c-4. Properties, settings tab b. Click...

  • Page 548

    Figure c-5. Ascii setup dialog box step 9: hyperterminal is now ready to communicate with the relay. Table c-1 describes the required connection for each rs-232 port. Table c-1. Rs-232 communication ports connection type front port 9-pin female dce pc to front rs-232 port cable straight rear port 9-...

  • Page 549

    9365200990 rev f be1-cds240 settings calculations i appendix d • settings calculations table of contents appendix d • settings calculations...........................................................................................D-1 general .............................................................

  • Page 550

    Ii be1-cds240 settings calculations 9365200990 rev f this page intentionally left blank..

  • Page 551

    Appendix d • settings calculations general these settings calculations are provided to assist in developing the required settings for the be1- cds240, current differential system. To develop these settings, the paragraphs in this section discuss the following tasks:  verify ct performance  determi...

  • Page 552

    D-2 be1-cds240 settings calculations 9365200990 rev f table d-1. Example 1 specifications specifications high side low side tertiary nominal voltage and taps 230 kv +2.5%, 5% 115 kv +10%, auto, line end connection 13.8 kv +2.5%, 5% mva 3 stage cooling @ 55 o c & overload to 65 o c 150/200/250/280 15...

  • Page 553

    Note this procedure calculates the “saturation factor” as: sf = (i * r) (/ (ansi c-class voltage rating) where r includes ct resistance. See setting note 3 for additional information on other definitions of saturation factor. Step 1. Determine the maximum ct secondary fault current for external faul...

  • Page 554

    • for delta-co v bg is a function of of positive-sequence to zero-sequence currents, but may be neglecting r r , use r l from figure d-1: high low note nnected the proportion approximated by the same equation as fo cts: r wye connected cts (for worst case). V 7 37 6 0 57 0 7 29 v bg . . . . V . . * ...

  • Page 555

    D s etermine tap setting calculate ideal taps step 1. Use the fo for these equations are in table d-2. Llowing three equations to calculate ideal taps. Parameters 9365200990 rev f be1-cds240 settings calculations d-5 1 ctr 1 kv comp * * 3 1000 ta * * 1 mva 1 p 2 * 2 * 3 2 * 1000 * ctr kv comp mva 2 ...

  • Page 556

    Note: 3 factor when calculating the tap adjust settings for the be1-87t, the 3 compn factor had to be included rega ing the cts in delta or by using rdless of whether phase compensation was done by connect internal delta compensation. The be1-cds240 relay does not magnify the secondary current whe...

  • Page 557

    Note unmonitored capacitor banks should be avoided if possible or they must be treated very carefully to avoid false tripping due to inrush currents. Step 1. Calculate desired minimum pickup setting in times tap. Choose the desired minimum pickup in the factor x calculated using the following equati...

  • Page 558

    Has c a high peak that is non-sinusoidal. The relay extracts the fundamental component of the operate urrent for use by the unrestrained element to greatly reduce its sensitivity to this non-sinusoidal inrush current. In addition, the high initial peak generally decays quickly to a lower value. The ...

  • Page 559

    9365200990 rev f be1-cds240 settings calculations d-9 calculate slope the percentage restrained tripping characteristic is defined by the slope ratio. The slope setting s is the of s the ratio of the differential current (iop) caused by the sum of all the mismatch sources versus the through current....

  • Page 560

    Offset i o offset o o i s s minpu m i s minpu s minpu m ac ab m 1 i figure d-2. Slope and operating margin step 2. Choose slope setting s. The tripping slope s must be greater than s i to provide a safety margin at the differential tripping characteristic knee point (intersection of the minimum pick...

  • Page 561

    Step 4. Calculate operating margin m o . The operating margin m o is given by: offset i o i s s minpu m 1 the conservative calculation of margin at the knee point uses s i as calculated in calculate slope, step 1. For this example, m o in times tap is: tap times 040 . 0 024 . 0 39 29 1 * 25 . 0 m o ...

  • Page 562

    Example two – two winding transformer verify ct performance refer to figure d-3 and table d-3 for the application parameters used in this example. Figure d-3. Two winding transformer relay setting calculation example table d-3. Example 2 specifications specifications high side low side nominal volta...

  • Page 563

    Step 1. Determine the maximum ct secondary fault current for external faults at f (i f3 for 3-phase, and i fg for single-phase). Refer to figure d-10 for this example. High low a .5 19 60 1171 i fg a 32 60 1916 i f3 a 66 160 10603 i f3 a 70 160 11231 i fg a more complete analysis of ct performance w...

  • Page 564

    Low high . . 7 0 5 19 v bg .7 0 2 70 v bg v .6 13 .0 98 v  note since a phase-to-ground fault looks like a phase-to-phase fault on the delta side of a delta/wye transformer, each ct has to carry only one times the one way lead burden. Step 4. Determine the effective ct accuracy class (v ce ): n n v...

  • Page 565

    Table d-4. Parameter pa r tion s for equations to calculate ideal taps ramete description explana mva mva base full load mva or top rating of the protected equipment kvn each ct input circuit kv base for ct input n l-l voltage in kv for ctrn r ct input n ct ratio fo actual ratio not effective ratio ...

  • Page 566

    Note unmonitored capacitor banks should be avoided if possible. Or, they must be treated very carefully to avoid false tripping due to inrush currents. S calculate desired minimum pickup tep 1. Setting in times tap. Choose the desired minimum pickup in per unit on the transformer full load base (0.2...

  • Page 567

    Since the x tap values are based upon the forced cooled rating and adjusted if necessary by the factor calculated in calculate minpu, step 1, equation at the top of this page. The pickup can be calculated by the following equation: 9365200990 rev f be1-cds240 settings calculations d-17 cooled forced...

  • Page 568

    Step 1. Calculate the operating slope s i . The operating slope s i is the ratio of the differential current (i op ) caused by the sum of all the mismatch hanger (this can be compensated for in the tap calculation). You may choose to include the no load taps may be adjusted without the relay taps sh...

  • Page 569

    S = s i + slope margin s = 29% + 10% = 39% calculate offset current i step 3. Ugh current loading so it tends to offset the operating slope s i upward from the origin. Thus, it decreases the safety arg ial tripping characteristic knee point (intersection of the minimum pickup tripping characteristic...

  • Page 570

    Setting restraint 2 ia ic ib ia 100 nd st 1 op nd 2 op nd 2 op nd 2 op * the b phase and c phase differential elements respond similarly with ib op1st and ic op1st substituted in the respective equation. This unique method of second harmonic sharing is recommended to ensure proper restraint on all p...

  • Page 571

    Setting note 1. Ct burden, delta connected cts, 3-phasefault 9365200990 rev f be1-cds240 settings calculations d-21 figure d-5. Ct burden, delta connected cts, 3-phase fault i a +i b +i c =0 i a =-(i b +i c ) v s =i a r w +(i a -i c )(r l +r r )-(i b -i a )(r l +r r =i ) r ) ) a (r w +r l +r r +r l ...

  • Page 572

    Setting note 2. Phase-to-phase fault, delta connected cts relay 2 i i d-22 be1-cds240 settings calculations 9365200990 rev f figure d-6. Phase-to-phase fault, delta connected cts assuming z 1 =z 2 , 3 2 3 i i phase 2 carries twice the fault current returning from the relay to the cts. Therefore, the...

  • Page 573

    Setting note 3. Ct performance evaluation: saturation factor the secondary current delivered by a current transformer to a relay circuit is always less than the current available from an ideal cti s, ideal . The ideal or ratio current i s i =i p /ctr is reduced by the excitation current (i e ) to yi...

  • Page 574

    Saturation factor defined from the ansi c classification, ignoring r s in figure d-8, the ct terminal voltage increases linearly with the secondary current along the v t =z b * i s line where z b is the total ct burden (leads plus relays for a particular fault and connection). A terminal voltage (v ...

  • Page 575

    Where v e is the internal excitation voltage (r ct * i f ) at the maximum fault current i f and v10` is the voltage of the curve passing through point q where the exciting is 10 amps. This voltage is practically in figure d-6, for instance), the saturation factor defined on the excitation curve appe...

  • Page 576

    Resistance is too optimistic in this range and should be discarded in favor of the excitation curve method. The absolute values of sf and sf` are compared in figure d-8 for the particular case where zc = 2, zb = 0.5 and r ct = 0.8 when if varies from 0 to 100 a. Sf if sf' if sf and sf` for zc=2, zb=...

  • Page 577

    Conclusion this analysis showed three measurements of the sf value. The third version, using the c-class of the ct and including the ct internal resistance in the voltage drop calculations is used to determine ct saturation measurements in the calculations for the relay. Setting note 4. Slope settin...

  • Page 578

    D-28 be1-cds240 settings calculations 9365200990 rev f this page intentionally left blank..

  • Page 580

    Route 143, box 269 highland, il 62249 usa http://www.Basler.Com, info@basler.Com phone +1 618-654-2341 fax +1 618-654-2351.