Instruction manual for overcurrent relay be1-50/51b publication: 9252000991 revision: n 03/08 www . Electricalpartmanuals . Com.
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9252000991 rev n be1-50/51b introduction i introduction this instruction manual provides information about the operation and installation of the be1-50/51b overcurrent relay. To accomplish this, the following information is provided: • general information and specifications • controls and indicators...
Ii be1-50/51b introduction 9252000991 rev n first printing: april 1992 printed in usa © 2008 basler electric, highland illinois 62249 usa all rights reserved march 2008 it is not the intention of this manual to cover all details and variations in equipment, nor does this manual provide data for ever...
9252000991 rev n be1-50/51b introduction iii revision history the following information provides a historical summary of the changes made to this instruction manual (9252000991). Revisions are listed in reverse chronological order. Manual revision and date change n, 03/08 • updated front panel drawi...
Iv be1-50/51b introduction 9252000991 rev n d, 05/94 • clarified time pickup and inst pickup specification ranges, page 1-3. • changed figure 1-2 to also show one ampere unit burden data. • changed time characteristics accuracy statement, page 1-6. • added (repeated) equation for the characteristic ...
9252000991 rev n be1-50/51b introduction v contents section 1 • general information ................................................................................................ 1-1 section 2 • controls and indicators...................................................................................
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9252000991 rev n be1-50/51b general information i section 1 • general information table of contents section 1 • general information ................................................................................................ 1-1 introduction..........................................................
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9252000991 rev n be1-50/51b general information 1-1 section 1 • general information introduction be1-50/51b overcurrent relays are microprocessor based, non-directional phase or ground relays that monitor the magnitude of a single phase ac current to provide accurate instantaneous and time overcurre...
1-2 be1-50/51b general information 9252000991 rev n figure 1-1. Be1-50/51b, s1 case model numbers model number variations in the be1-50/51b overcurrent relays are specified by a three digit extension to the model number. Tables 1-1 and 1-2 provide model number, case style, switch sw3-3 selections, a...
9252000991 rev n be1-50/51b general information 1-3 table 1-1. Be1-50/51b overcurrent relays, one ampere ct secondary, 50/60 hz sensing input range (amps) model number case style sw3-3 selects time inst be1-50/51b-101 a1 0.2 second delay 0.1 - 3.18 0.2 - 19.8 be1-50/51b-201 a1 curve set 0.1 - 3.18 0...
1-4 be1-50/51b general information 9252000991 rev n specifications be1-50/51b electrical and physical specifications are listed in the following paragraphs. Current sensing input 1 ampere unit continuous current: 2.8 aac one second rating: 80 aac 5 ampere unit continuous current: 14 aac one second r...
9252000991 rev n be1-50/51b general information 1-5 time characteristic curve constants are listed in tables 1-3 and 1-4. Constants have been selected to conform to the characteristics of electromechanical relays over a range of pickup multiples from 1.3 to 40. Values of the constants are provided f...
1-6 be1-50/51b general information 9252000991 rev n integrating reset reset begins when the current drops below 95% of pickup and the relay has not timed out. Switch sw3-4 provides selection of either an instantaneous or integrating reset characteristic. Opening sw3-4 forces the instantaneous reset ...
9252000991 rev n be1-50/51b general information 1-7 5 ampere unit pickup setting range: 1 to 99 aac setting increment: 1 aac accuracy: ±2%, ±25 milliamperes at or above 1.0 ampere setting dropout dropout occurs at 95% of pickup value. Curve characteristics be1-50/51b instantaneous characteristic cur...
1-8 be1-50/51b general information 9252000991 rev n burden burden is non-linear. Figure 1-4 illustrates the device burden. 1 ampere unit 0.1 amperes: z = 120 Ω 1.0 ampere: z = 5 Ω 5 ampere unit 0.5 amperes: z = 4.8 Ω 5.0 amperes: z = 0.2 Ω figure 1-4. Burden characteristics frequency response a chan...
9252000991 rev n be1-50/51b general information 1-9 figure 1-5. Harmonic rejection target indicators gravity latched, manually reset targets indicate that current of 0.2 amperes or greater was present in the trip circuit. Target coil resistance is less than 0.1 ohms and operate time is less than one...
1-10 be1-50/51b general information 9252000991 rev n impulse qualified to iec 255-5. Radio frequency interference (rfi) field-tested using a 5-watt, hand-held transceiver operating at random frequencies centered around 144 mhz and 440 mhz, with the antenna located 6 inches from the relay in both hor...
9252000991 rev n be1-50/51b controls and indicators i section 2 • controls and indicators table of contents section 2 • controls and indicators........................................................................................ 2-1 introduction.......................................................
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9252000991 rev n be1-50/51b controls and indicators 2-1 section 2 • controls and indicators introduction figure 2-1 illustrates the front panel controls and indicators of the be1-50/51b. Figure 2-2 illustrates the location of switch sw3. Both illustrations have lettered call-outs that correspond to ...
2-2 be1-50/51b controls and indicators 9252000991 rev n p 0 05 3 -49 j b figure 2-2. Location of sw3 and auxiliary output jumper terminations www . Electricalpartmanuals . Com.
9252000991 rev n be1-50/51b controls and indicators 2-3 table 2-1. Be1-50/51b controls and indicators (refer to figures 2-1 and 2-2) locator control or indicator function a inst manual trip test points when shorted, the test points (jacks) provide a secure means to manually trip the controlled break...
2-4 be1-50/51b controls and indicators 9252000991 rev n locator control or indicator function k auxiliary output jumper terminations configures the auxiliary output contacts to close with either the instantaneous (50) trip and/or the timed (51) trip. Jumper e2 to e1a to close the auxiliary contact w...
9252000991 rev n be1-50/51b functional description i section 3 • functional description table of contents section 3 • functional description ........................................................................................... 3-1 general ..........................................................
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9252000991 rev n be1-50/51b functional description 3-1 section 3 • functional description general be1-50/51b overcurrent relays are microprocessor based non-directional relays that measure ac current to provide secure and reliable instantaneous and time overcurrent protection for power systems. Func...
3-2 be1-50/51b functional description 9252000991 rev n outputs instantaneous and timed system circuit breakers controlled by the output contacts can be manually tripped by applying a short across the time or inst manual trip front panel test points. Current flow in the trip circuit is indicated by t...
9252000991 rev n be1-50/51b installation i section 4 • installation table of contents section 4 • installation .................................................................................................................. 4-1 general .................................................................
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9252000991 rev n be1-50/51b installation 4-1 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 and part number against the requisi...
4-2 be1-50/51b installation 9252000991 rev n front view side view (157.2) 6.19 (19.1) .75 mounting panel d2750-23 3.16 (80.2) (80.2) 3.16 .31 (7.9) (168.91) 6.65 (192.28) 7.57 (60.96) 2.40 (49.53) 1.95 (55.75) 2.195 figure 4-2. Outline dimensions, a1 case (semi-flush mount) figure 4-3. Panel drillin...
9252000991 rev n be1-50/51b installation 4-3 d2750-29 note: numbers in parentheses indicate metric dimensions (millimeters). All other dimensions are in inches. Figure 4-4. Outline dimensions, s1 case (semi-flush mount) figure 4-5. Panel drilling diagram, s1 case (projection mount) www . Electricalp...
4-4 be1-50/51b installation 9252000991 rev n 4.03 4.03 .31 .75 6.19 (19.1) (7.9) (102.4) (102.4) (157.2) 10-32 screws mounting panel .25 (6.4) a a 5/16-18 stud 2 places terminal extension (typ.) for detailed instructions. See the terminal projection mounting kit supplied. Mounting panel (62.48) 2.19...
9252000991 rev n be1-50/51b installation 4-5 figure 4-7. Ac input connections www . Electricalpartmanuals . Com.
4-6 be1-50/51b installation 9252000991 rev n figure 4-8. Dc control connections www . Electricalpartmanuals . Com.
9252000991 rev n be1-50/51b installation 4-7 figure 4-9. Be1-50/51b terminal connections, rear view maintenance be1-50/51b overcurrent relays require no preventive maintenance. However, periodic checks should be performed according to scheduled practices. A recommended periodic test is provided in s...
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9252000991 rev n be1-50/51b testing i section 5 • testing table of contents section 5 • testing ............................................................................................................................ 5-1 general ......................................................................
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9252000991 rev n be1-50/51b testing 5-1 section 5 • testing general dielectric testing, operational testing, and periodic testing are described in the following paragraphs. Dielectric test in accordance with iec 255-5 and ieee c37.90-1989, one-minute dielectric (high potential) tests may be performe...
5-2 be1-50/51b testing 9252000991 rev n be1-50/51b 9 8 7 6 5 4 2 time inst 3 current source input stop timer start amps test set p0052-89 figure 5-1. Pickup and timing test setup be1-50/51b 9 8 7 6 5 4 2 time inst 3 current source input stop timer start amps test set p0052-88 1.0a current limiter ta...
9252000991 rev n be1-50/51b testing 5-3 test procedure for five ampere units time pickup test perform preliminary setup: • connect test setup as shown in figure 5-1. • ensure that sw3 switches are set correctly: sw3-1 for operating frequency, sw3-2 to off (no instantaneous delay), sw3-3 to off (no i...
5-4 be1-50/51b testing 9252000991 rev n • set inst pickup to 90. Step 1. Prepare to apply 1.5 amperes input current to terminals 8 and 9 and record the elapsed time from when current is applied until time output contacts close. Step 2. Apply the current (step from 0 to 1.5 amperes) and record the el...
9252000991 rev n be1-50/51b testing 5-5 • set curve to i. • set time pickup to 1.0. • set inst pickup to 90. Step 1. Set target current source to 1.0 ampere, ac. Step 2. Read all of step 3 before beginning step 3. Step 3. Apply 4.0 amperes input current to terminals 8 and 9. After the unit trips, re...
5-6 be1-50/51b testing 9252000991 rev n • ensure that sw3 switches are set correctly: sw3-1 for operating frequency, sw3-2 to off (no instantaneous delay), sw3-3 to off (no instantaneous delay (100 series relays) or abb type curves selected (200 series relays)), and sw3-4 to off (selects instantaneo...
9252000991 rev n be1-50/51b testing 5-7 integrating reset test (applicable only to 200 series relays) perform preliminary setup: • connect test setup as shown in figure 5-1. • ensure that sw3 switches are set correctly: sw3-1 for operating frequency, sw3-2 to off (no instantaneous delay), sw3-3 to o...
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9252000991 rev n be1-50/51b relay differences i section 6 • relay differences table of contents section 6 • relay differences...................................................................................................... 6-1 general ...............................................................
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9252000991 rev n be1-50/51b relay differences 6-1 section 6 • relay differences general this section provides the information necessary to support be1-50/51b 100 series relays, revision s and previous. In all unit revisions r and previous sw3 is the same as sw8. Differences be1-50/51b 100 series rel...
6-2 be1-50/51b relay differences 9252000991 rev n figure 6-1. Location of controls and indicators for unit revision q and previous, 100 series relays www . Electricalpartmanuals . Com.
9252000991 rev n be1-50/51b relay differences 6-3 j d1181-08 k 1 on 4 3 2 + + + + + cr17 u7 q2 w2 1a 1 1 1 1 1 1 6 5 1 4 k3 c10 cr1 cr4 c26 c27 c28 c29 c30 sw2 sw1 sw4 sw3 sw5 sw6 sw7 ar4 ar3 ar5 ar 6 ar 2 tpg tp3 tp2 tp1 t2 p1 k1 k2 c12 c1 1 c14 r16 w3 ar1 c51 c3 e2 e3 e1a r17 e1b c1 3 ds3 ds2 t1 w...
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9252000991 rev n be1-50/51b time characteristic curves i appendix a • time characteristic curves table of contents appendix a • time characteristic curves................................................................................A-1 time characteristic curves.......................................
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9252000991 rev n be1-50/51b time characteristic curves a-1 appendix a • time characteristic curves time characteristic curves figures a-1 through a-9 illustrate the time characteristic curves that are programmed into the nonvolatile memory of series 100 relays. Figures a-1 through a-14 illustrate th...
A-2 be1-50/51b time characteristic curves 9252000991 rev n figure a-2. Time characteristic curve, l-long inverse (sw3-3 off, similar to abb co-5) www . Electricalpartmanuals . Com.
9252000991 rev n be1-50/51b time characteristic curves a-3 figure a-3. Time characteristic curve, d-definite time (similar to abb co-6) www . Electricalpartmanuals . Com.
A-4 be1-50/51b time characteristic curves 9252000991 rev n figure a-4. Time characteristic curve, m-moderately inverse (similar to abb co-7) www . Electricalpartmanuals . Com.
9252000991 rev n be1-50/51b time characteristic curves a-5 figure a-5. Time characteristic curve, i-inverse (sw3-3 off, similar to abb co-8) www . Electricalpartmanuals . Com.
A-6 be1-50/51b time characteristic curves 9252000991 rev n figure a-6. Time characteristic curve, v-very inverse (sw3-3 off, similar to abb co-9) www . Electricalpartmanuals . Com.
9252000991 rev n be1-50/51b time characteristic curves a-7 figure a-7. Time characteristic curve, e-extremely inverse (sw3-3 off, similar to abb co-11) www . Electricalpartmanuals . Com.
A-8 be1-50/51b time characteristic curves 9252000991 rev n figure a-8. Time characteristic curve, bs142-b (bs142 very inverse) www . Electricalpartmanuals . Com.
9252000991 rev n be1-50/51b time characteristic curves a-9 figure a-9. Time characteristic curve, bs142-c (bs142 extremely inverse) www . Electricalpartmanuals . Com.
A-10 be1-50/51b time characteristic curves 9252000991 rev n figure a-10. Time characteristic curve, s2-short inverse (sw3-3 on, similar to ge iac 55) www . Electricalpartmanuals . Com.
9252000991 rev n be1-50/51b time characteristic curves a-11 figure a-11. Time characteristic curve, l2-long inverse (sw3-3 on, similar to ge iac 66) www . Electricalpartmanuals . Com.
A-12 be1-50/51b time characteristic curves 9252000991 rev n figure a-12. Time characteristic curve, i2-inverse (sw3-3 on, similar to ge iac 51) www . Electricalpartmanuals . Com.
9252000991 rev n be1-50/51b time characteristic curves a-13 figure a-13. Time characteristic curve, v2-very inverse (sw3-3 on, similar to ge iac 53) www . Electricalpartmanuals . Com.
A-14 be1-50/51b time characteristic curves 9252000991 rev n figure a-14. Time characteristic curve, e2-extremely inverse (sw3-3 on, similar to ge iac 77) www . Electricalpartmanuals . Com.
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