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Basler BE1-87G Instruction Manual

Manual is about: VARIABLE PERCENTAGE DIFFERENTIAL RELAY

Summary of BE1-87G

  • Page 1

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  • Page 2: Introduction

    Be1-87g - introduction i w a r n i n g ! To avoid personal injury or equipment damage, only qualified personnel should perform the procedures presented in this manual. Introduction this manual provides information concerning the operation and installation of the be1-87g variable percentage different...

  • Page 3

    Ii be1-87g - introduction confidential information of basler electric company, highland, il. It is loaned for confidential use, subject to return on request, and with the mutual understanding that it will not be used in any manner detrimental to the interest of basler electric company. First printin...

  • Page 4: Contents

    Be1-87g - introduction iii contents section 1 general information 1-1 description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 variable restra...

  • Page 5

    Iv be1-87g - introduction contents - continued section 5 testing and setting - continued sensing input range 1, operating characteristics . . . . . . . . . . . . 5-5 sensing input range 2, operating characteristics . . . . . . . . . . . . 5-6 extended restraint operating characteristic . . . . . . ....

  • Page 6

    Be1-87g - general information 1-1 warning relays manufactured prior to july 22, 1991 (eia date code symbol 9129 and previous) do not have case jumpers between terminals 7 and 8 (single phase units). This also applies to three phase relays terminals 7 and 8, terminals 13 and 14, and terminals 17 and ...

  • Page 7

    1-2 be1-87g - general information figure 1-1. Typical single-phase application scheme figure 1-2. Typical three-phase application scheme.

  • Page 8

    Be1-87g - general information 1-3 variable restraint characteristic at high current levels, the inevitable difference in the saturation characteristics between current transformers indicates a need for a compensating decrease in relay sensitivity. The design of the be1-87g provides a restraint facto...

  • Page 9

    1-4 be1-87g - general information be1-87g model number g three-phase sensing input 1 sensing range switch selectable for 0.1, 0.15, 0.2, 0.4, 0.5, 0.8, or 1.6 a e normally open output relay a1 instantaneous timing j operating power derived from 125 vdc or 100/120 vac a internally operated targets (o...

  • Page 10

    Be1-87g - general information 1-5 specifications be1-87g relays are available in single-phase and three-phase configurations, and with the following features and capabilities. Current sensing inputs (5 ampere) nominally rated at 5 amperes, with a range of 45 to 65 hertz. Maximum current per input: 1...

  • Page 11

    1-6 be1-87g - general information pickup accuracy (1 ampere) for i r 1 ampere, ±5% of the operate pickup characteristic or 25 milliamperes whichever is greater. Actual operating characteristics are shown in graph format in section 5, testing and setting the relay. For i r 1 amperes, up to a maximum ...

  • Page 12

    Be1-87g - general information 1-7 isolation in accordance with ansi/ieee c37.90, one minute dielectric (high potential) tests as follows: all circuits to ground: 2121 vdc input to output circuits: 1500 vac or 2121 vdc surge withstand capability qualified to ansi/ieee c37.90.1-1989 standard surge wit...

  • Page 13: (Controls and Indicators)

    Be1-87g - human machine interface (controls and indicators) 2-1 section 2 • human machine interface (controls and indicators) description table 2-1 lists and briefly describes the be1-87g variable percentage differential relay operator controls and indicators. Reference the call-out letters to figur...

  • Page 14

    Be1-87g - functional description 3-1 section 3 • functional description general be1-87g variable percentage differential relays are static devices that protect motors and generators by providing an output signal when incoming current does not match outgoing current by a predetermined but variable li...

  • Page 15

    3-2 be1-87g - functional description 0 5 10 15 20 25 30 35 0 1 2 3 4 5 6 7 8 9 10 current(amps) voltage(volts) 0 5 10 15 20 25 30 0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 current(amps) voltage(volts) and one ampere nominal), one transformer on each side of the protected machine, supply sensing current ...

  • Page 16

    Be1-87g - functional description 3-3 figure 3-3. Sensing input range 2 (1 ampere),stabilizing reactor impedance characteristics bandpass filters outputs from the relay transformers are filtered to eliminate the third harmonic and to minimize the effect of dc offset caused by ct saturation (as may oc...

  • Page 17

    3-4 be1-87g - functional description supply status output relay continually energized and its output contacts open. If the power supply output voltage falls below the requirements for proper operation, the power supply status output relay de-energizes, closing the nc output contacts. Power supply ba...

  • Page 18: Section 4 • Installation

    Be1-87b - installation 4-1 figure 4-1. S1 case, outline dimensions, front view section 4 • installation general when not shipped as part of a control or switchgear panel, the relays are shipped in sturdy cartons to prevent damage during transit. Immediately upon receipt of a relay, check the model a...

  • Page 19

    4-2 be1-87b - installation figure 4-2. S1 case, double-ended, outline dimensions, semi-flush mounting, side view figure 4-3. S1 case, double-ended, outline dimensions, projection mounting, side view.

  • Page 20

    Be1-87b - installation 4-3 figure 4-4. S1 case, double-ended, panel drilling diagram, semi-flush mounting figure 4-5. S1 case, double-ended, panel drilling diagram, projection mounting, rear view.

  • Page 21

    4-4 be1-87b - installation stabilizing reactor the stabilizing reactor for a three-phase relay is mounted on the rear of the relay. For projection mounting or convenience, the stabilizing reactor can be removed and relocated. Rewire in accordance with the procedures and illustrations in this section...

  • Page 22

    Be1-87b - installation 4-5 warning relays manufactured prior to july 22, 1991 (eia date code symbol 9129 and previous) do not have case jumpers between terminals 7 and 8 (single phase units). This also applies to three phase relays terminals 7 and 8, terminals 13 and 14, and terminals 17 and 18. Exe...

  • Page 23

    4-6 be1-87b - installation figure 4-8. Typical dc control connections figure 4-9. Single-phase sensing input connections.

  • Page 24

    Be1-87b - installation 4-7 figure 4-10. Three-phase sensing input connection.

  • Page 25

    4-8 be1-87b - installation figure 4-11. Single-phase internal connection diagram.

  • Page 26

    Be1-87b - installation 4-9 figure 4-12. Three-phase internal connection diagram.

  • Page 27

    Be1-87g - testing and setting 5-1 caution to avoid false tripping on three phase units, upper connection plug must be in place prior to inserting or removing lower connection plug. Section 5 • testing and setting general proper operation of the relay may be confirmed by performing the operational te...

  • Page 28

    5-2 be1-87g - testing and setting warning during testing, do not apply or generate continuous operate current greater than three amperes. If the operate current is greater than three amperes, a temperature increase in the reactor may result and cause insulation breakdown. Note because of the reactan...

  • Page 29

    Be1-87g - testing and setting 5-3 figure 5-2. Location of assemblies (single phase only) non-component side of lower magnetics/shield board figure 5-3. Tp-1 and tp-2 on single phase relays.

  • Page 30

    5-4 be1-87g - testing and setting note output contacts may be nc or no, depending on style of relay. Check continuity at terminals 1 and 10 with relay tripped and not tripped to assure correct response for the type of contacts specified. Single-phase trip and dropout test step 1. Connect the test se...

  • Page 31

    Be1-87g - testing and setting 5-5 figure 5-4. Sensing input range 1, operating characteristics.

  • Page 32

    5-6 be1-87g - testing and setting figure 5-5. Sensing input range 2, operating characteristics.

  • Page 33

    Be1-87g - testing and setting 5-7 restraint current (amperes) restraint current (amperes) 0 2 4 8 6 1 0 1 2 1 4 1 6 1 8 2 0 0 5 1 0 1 5 2 0 2 5 3 0 3 5 4 0 0 1 2 3 4 5 6 7 8 d 2 3 5 4 - 1 4 04-30-96 range 1 range 2 15 20 25 30 35 40 45 0 10 20 30 40 50 60 70 80 90 multiples of pickup response time (...

  • Page 34

    Be1-87g - testing and setting 5-9 note sensing input range 1: if r w is unknown, assume r w = 0.003 * n a sensing input range 2: if r w is unknown, assume r w = 0.01 * n a terms for calculations i" d subtransient current n total number of ct turns n a number of ct turns in use (for multi-ratio type)...

  • Page 35

    5-8 be1-87g - testing and setting note if option b (current operated) targets are specified, the target is only operable when a minimum of 0.2 ampere is present in the output circuit (terminals 1 and 10). Phases b and c, trip and dropout test step 1. If the relay is a 3-phase relay, repeat steps 1 t...

  • Page 36

    5-10 be1-87g - testing and setting table 5-1. Recommended pickup settings vce (lower value) sfr 1 1.5 2 3 4 20 0.2 0.4 0.5 0.8 1.6 50 0.2 0.4 0.4 0.5 0.8 100 0.2 0.2 0.4 0.4 0.5 200 0.1 0.1 0.2 0.4 0.5 >200 0.1 0.1 0.2 0.4 0.5 note: use next higher setting if cts are a mix of c classification and t ...

  • Page 37

    Be1-87g - testing and setting 5-11 i d 1000 4.16× 3 0.15×200 138.8 30 4.6 × ct rating inequality (1) is met with ct #2, but not with ct #1. However, since the locked rotor current is only 4.8 times ct rating [vs. The assumption of 20 times rated for inequality (1)], the application is suitable. Sfr ...

  • Page 38

    5-12 be1-87g - testing and setting inequality (1) is met with ct #2, but not with ct #1. However, since the maximum external fault current is only 4.6 times ct rating [vs. The assumption of 20 times rated for inequality (1)], the application is suitable. Sfr = (100/50)*(0.36/0.19) = 3.8 using the sf...

  • Page 39: Section 6 • Maintenance

    Be1-87g - maintenance 6-1 caution substitution of printed circuit boards or individual components does not necessarily mean the relay will operate properly. Always test the relay before placing it in operation. Section 6 • maintenance general be1-87g variable percentage differential relays require n...

  • Page 40

    Be1-87g - manual change information 7-1 section 7 • manual change information summary and cross reference guide this section contains information concerning the previous editions of the manual. The substantive changes to date are summarized in table 7-1. Table 7-1. Be1-87g changes revision summary o...