Related Manuals for GE IFV51AD
Summary of Contents for GE IFV51AD
- Page 1 INSTRUCTIONS GEK-49865A GEK-49865 Supersedes TIME OVERVOLTAGE RELAYS TYPES IFV51AD IFV71AD IFV71BD GENERAL ELECTRIC...
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Page 2: Table Of Contents
GEK-49865 CONTENTS PAGE DESCR IPTION A P PL I CATION • • CONSTRU CT ! ON ......... . . RAT INGS �... - Page 3 Figures 6 and 7. APPL ICATION The IFV51AD, IFV71AD and IFV71BD relays are single-phase, voltage-operated relays that may be used for the protection, or time control, o f circuits where overvoltage, or the sudden presence o f voltage, is the controlling factor.
- Page 4 GEK-49865 TABLE II Continuous Rating ---- ------------------- I FV71AD and 71BD H IGH-SE ISM IC TARGET AND SEAL- IN UN IT Ratings for the target and seal-in unit are shown in Table I I I. TABLE I I I 2. 0 D C Resistance + 10% ( Ohms) 8.
- Page 5 GEK-49865 TADLE IV Power Factor Hatts Tap Setting Volt Amps 2.99 0.54 1.61 2.86 0.49 1.40 1.28 2.79 0.46 2.71 0.42 1.14 2.65 0.40 1.06 0.962 2.60 0.37 2.56 0.35 0.90 0.89 2.53 0.35 2.46 0.35 0.86 2.40 0.86 0.36 2.37 0.37 0.88...
- Page 6 GEK-49865 TABLE V Power Factor Watts Relay Frequency Rated Volts Tap Setting Vo 1t Amps 14.52 0.55 7.99 10.20 5.10 0.50 8.30 0.47 3.90 2.51 5.84 0.43 1.83 4.46 0.41 0 � 12.72 4.58 9.17 0.35 3.21 7.58 0.34 2.58 5.30 0.35 1.86...
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Page 7: Time Overvoltage Unit
The IFV51AD relay is an overvoltage relay that closes its contacts when the voltage increases to the pickup value as set on the tap block. The IFV71AD relay is similar to the IFV51AD relay, except that it is frequenc y compensated hold its calibration vJithin 7. -
Page 8: Contacts
GEK-49865 A C CEPTANCE TESTS Immediately upon receipt of the relay, an inspection and acceptance test should be made to make sure that no damage has been sustained in shipment and that the relay calibrations have not been disturbed. If the examination or test indicates that readjustment is necessary, refer to the section on SERVICING. -
Page 9: Power Requirements, General
GEK-49865 POWE R REQU IREMENTS, GENERAL All alternating-current (A C) operated devices are a f fected by frequency. Since non sinusoidal wave forms can be analyzed as a fundamental frequency plus harmonics o f the fundamental frequency, it follows that alternating-current devices (relays) will be a f fected by the applied wave form. -
Page 10: Pickup Test
TABLE V I Relay Volts Applied Frequency Min. Max. 166.4 IFV51AD 146.9 & I FV71AD 166.4 50 or 60 H IGH-SE ISM IC TARGET AND SEA L- IN UNIT The target and seal-in unit has an operating coil tapped at and 2.0 amperes. -
Page 11: High-Seismic Instantaneous Unit
GEK-49865 D ecrease the current slowly until the seal-in unit drops out. See Table V I I. TABLE V I I - 2.0 0.50 or more H IGH-SE ISM IC INSTANTANE OUS UNIT The instantaneous unit range is 120 to 200 volts, or 180 to 300 volts, and is continuously adjustable by means of a potentiometer located in the rear of the relay. -
Page 12: High-Seismic Target And Seal-In Unit
GEK-49865 Per form a pickup test at system frequency, as outlined in the ACCEPTANCE TESTS section. PERIODIC CHECKS AND ROUTINE MAINTENANCE In view o f the vital role o f protective relays in the operation o f a power system, it is important that a periodic test program be follo\'ied. - Page 14 GEK-49865 Apply times tap-setting voltage to the relay. Adjust the position of the d rag magnet assembly to obtain an operating time as close as possible to 9.5 seconds, at least between 9.4 and 9.6 seconds. The drag magnet assembly should be approximately in the middle of its travel. drag magnet assembly is adjusted by loosening the two screws securing it to the support structure.
- Page 16 Internal Connections for Relay Types I FV71AD - Front View Figure (0275A2030- 0) Internal Connections for Relay Types I FV71BD - Front View Figure 6 (0273A9038-0) Typical External Connections for IFV51AD or I FV71AD Relay Figure 7 (0273A9039-0) Typical External Connections for I FV71BD Relay Figure 8 (0275A2075-1)
- Page 17 GEK-49865 TO P P!V OT TIME OVER VOLT AGE TAP SELECTOR P SELECTOR BLOCK INS TA NT AN EO US �)[;L-iN UNI T " "'- : f-\RGE T l:;;� scP :=.vv _ ,_;. :_ ,� -� > , CO NT AC T :£...
- Page 18 GEK-49865 TIME OVER VOLTAGE IT AP SELECTOR INSTANTANEOUS U-MAGNET VOLT AGE RANGE ASSEMBLY ADJUSTMENT Figure 2 (8043454) Type IFV71BD Relay, RemGved from Case, Rear View...
- Page 19 UNI T INDUCTION SEAL-IN \UNIT II '*- =SHORT FINGER Figure (0275A2026-0) Internal Connections for Relay Types IFV51AD - Front View I N DUCTI O N SEAL-IN UNiT FI N GE R -¥ = SH OR T Figure 4 ( 0275A2029-0)
- Page 20 GEK-49865 • 59-IFV?IB SEAL-IN SI-TARGET TOV- TIME OvERVOLTAGE 159 159 I N S T A NT A U :: N E 0 OVERVOLTAGE 52-CIRCUI T BRE-KER MONITOR TRIP ALARM Figure 7 (0273A9039-0) Typical External Connections for IFV71BD Relay...
- Page 21 <.!> '--- --'- -- -..; � I � � .1.0 �- -- -- -- -; ! 0 . ::E �-' --·-- -- --' 1- '- -+-�- - . 0. 6 0 .4 ( 0275A2075-l ) Figure Time-Voltage Characteristics for Relay Types IFV51AD...
- Page 22 GEK-49865 ll 0 120 130 140 150 160 170 !00 IS0200 PERCENT OF TAP VALUE Figure 9 (0275A2074-0) Time-Voltage Characteristics for Relay Types IFV71...
- Page 23 GEK-49865 I 00 ""' u... I 05 TYPICAL PICKUP VOLTS Figure 10 ( 0273A9588-0) Typical Pickup-Versus- Frequency Characteristic for the I FV71BD Instantaneous Unit...
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Page 24
GEK-49865 TO ST TIMER VARIABLE VOLTAGE AT RATED FREQ. T O STOP TIMER RELAY TERMINALS ND I CAT IN LIGHT WHEN 12XCA2BA I CHEO
- Page 25 GEK-49865 VARIABLE RESfSTOR RELAY TERMINALS VOLTS 12XCA28A I Figure 12 (0273A9C79-0) Test Connections for Testing the High-Seismic Target and Seal-in Unit Used \'lith the IFV Relay VARIABLE VOLTAGE SOURCE . A. T RATED FREQUENCY RELAY TERMINALS Figure 13 (0273A9193-0) Test Connections for Testing the High-Seismic Instantaneous Unit Used with the IFV Relay...
- Page 26 GEK-49865 ORAWOUT ELEMENT CONNECTION PLUG CONTACT FINGERS SUPPORT STRUCTURE RELAY CASE SHORTING BAR CASE CONNECTION BLOCK Figure 14 (8C42715) Cross Section o f Drawout Case Connections...
- Page 27 8-32 SChEW T I E #IOXI/2 TYPE " A " V lEW TTl N G R.EADCU -�· HD W.-025 7 A8 549 G-1 SC R.E W VIEW Sh.l Figure 15 (0257A8452 Outline and Panel Drilling Relay Types IFV51AD, 71AD and 7180...
- Page 28 I 88 .AeDVE \"SMMT HK, P.ANEL 5 AND Figure 16 (0257A845 2 Sh. 2 -3) Outline an d Panel Drilling for Re lay Types IFV51AD, 71AD and 7180 (5/92) (500) GENERAL ELECTRIC METER AND CONTROL BUSINESS DEPT., MALVERN, PA 19355...