GE IFD Instructions Manual Download | Manualshive

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Summary of Contents for IFD

Page 1: ...INSTRUCTIONS GEK 34069B PERCENTAGE DIFFERENTIAL RELAY TYPE IFD MODEL 12IFD51D A GENERAL W ELECTRIC Courtesy of NationalSwitchgear com...

Page 2: ...FAULT DETECTOR TARGET SEAL IN UNIT RECEIVING HANDLING AND STORAGE ACCEPTANCE TEST VISUAL INSPECTION MECHANICAL INSPECTION DRAWOUT RELAYS GENERAL POWER REQUIREMENTS GENERAL ELECTRICAL TESTS INDUCTION...

Page 3: ...aker CT s on the tap used by the ratio of the neutral CT The purpose of the instantaneous unit in the IFD51D is to make the relay shock resistant The pick up setting of the instantaneous unit should b...

Page 4: ...urrents in the two restraint coils are equal With equal currents flowing in all three restraint coils the operating current required to close contacts will be approximately 1 23 times that required wi...

Page 5: ...K1 Rl 2 JR32 S 2 where I0 operating current required to close contacts IRI IR2 R3 current in each of the three restraining coils respectively 1 Operating coil current to overcome spring force Close co...

Page 6: ...k unit is used to adjust the operating coil current required to close contacts with no current in the restraints This control spring may be adjusted by turning the notched adjusting ring The time dial...

Page 7: ...oved and cause trouble in the operation of the relay ACCEPTANCE TEST Immediately upon receipt of the relay an inspection and acceptance test should be made to insure that no damage has been sustained...

Page 8: ...it to show continuity when the induction disk unit contacts close Set on the 25 percent tap the contact closing current should be approximately 0 9 amps OPERATING CURRENTS RESTRAINT CURRENT See Figure...

Page 9: ...be set at their desired operating points and these settings should be electrically tested LOCATION The location should be clean and dry free from dust and excessive vibration and well lighted to faci...

Page 10: ...e actual points of contact Never use knives files abrasive paper or cloth to clean relay contacts A burnishing tool as described above can be obtained from the factory 5 Instantaneous overcurrent unit...

Page 11: ...ed per 3 above the relay should pass the three restraint test given under Acceptance Tests RENEWAL PARTS It is recommended that sufficient quantities of renewal parts be carred in stock to enable the...

Page 12: ...T 0 TOP R f Mi BOT LOWER RIGHT UPPER RIGHT SI 0 S R I R V y N V v v V V V V V O J 9 3 5 7 o o C C 4 2 6 8 OPERATING 001L R RESTRAINT COIL SHORT FINGER FIG 1 0246A2241 2 Internal Connections For Model...

Page 13: ...0 C 30 5 8 7 875 200MM 000 203MM 5 781 147MM I A r4 75 I y 121MM t L I 9 5Q f F 242HM 375 QQ 7 50 l 718 J 250 18MM 6M M i t i 9 CUTbUT I f I 15 75 400MM 11 562 294MM 16 000 406MM 19 7 1 4 1 468 37MM V...

Page 14: ...T1 CD CO o ro P cn CO cr Co i o o O CD o r un o p r PU O o r O cn r O n o s rr CD n o an n o RESTRAI NT CURRENT AMPERES...

Page 15: ...7 0 9 1 I 0 C w 8 7 6 5 4 3 2 CO 15 CZ o o UJ CO z 0 I UJ 09 2 08 07 06 05 04 03 02 MULTIPLE OF OPERATING CURRENT REQUIRED TO CLOSE CONTACTS WITH RESTRAINT CURRENT INDICATED FIG 4 0246A3649 3 Time Cur...

Page 16: ...IX 4 CD CO CD 11 CD CD i o 52 O o CD a CD m m x S S3 7 rt l NEUTRAL RESISTOR CD CO TC CD D 3 o QJ CD OP INST yV rA V o CD l7 O Z3 CIRCUIT BREAKER xn ZS D n AA AAJ ri AUX CT IF REQUIRED TO MATCH CT RAT...

Page 17: ...ORTiNG BAR NOTE AFTER ENGAGING AUXILIARY 8RUSH CONNECTING PLUG TRAVELS 1 4 INCH BEFORE ENGAGING THE MAIN BRUSH ON THE TERMINAL BLOCK AUXILIARY BRUSH FIG 6 8025039 Cross Section Of Drawout Case Showing...

Page 18: ...A2 AO 11 o L O 7 TO ACCURATELY REPRODUCE KLAY CHARACTERISTICS ILL TESTS SHOULD BE MADE WITH RELAY IN CASE WITH CASE LEVEL BLOCK INSTANTANEOUS UNIT I CLOSED FOR LIGHT TO SHOW INDUCTION UNIT PICKUP TES...

Page 19: ...Since the A revision Figures 2 4 and 7 have been updated Courtesy of NationalSwitchgear com...

Page 20: ...3RZHU 0DQDJHPHQW 215 Anderson Avenue Markham Ontario Canada L6E 1B3 Tel 905 294 6222 Fax 905 201 2098 www ge com indsys pm Courtesy of NationalSwitchgear com...

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