GE IFC57AD Instructions Manual Download | Manualshive

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Summary of Contents for IFC57AD

Page 1: ...INSTRUCTIONS GEK 49948A Supersedes GEK 49948 TIME OVERCURRENT RELAYS TYPES IFC57AD AND IFC57BD GENERAL ELECTRIC Courtesy of NationalSwitchgear com ...

Page 2: ...US UNIT Setting the High Seismic Instantaneous Unit HIGH SEISMICTARGET ANDSEAL IN UNIT Pickup and Dropout Test 3 3 4 5 5 6 7 7 7 8 8 8 8 9 9 9 9 9 10 10 10 10 11 11 11 11 12 12 12 12 INSTALLATION INSTALLATION TESTS Time Overcurrent Units High Seismic Target and Seal In Unit High Seismic Instantaneous Unit PERIODIC CHECKS AND ROUTINE MAINTENANCE TIME OVERCURRENT UNIT HIGH SEISMIC INSTANTANEOUS UNIT...

Page 3: ... unit when it is supplied Also these relays are recognized under the Components Program of Underwriters Laboratories Inc The relays are mounted in a size Cl drawout case of molded construction The outline and panel drilling are shown in Figures 16 and 17 The relay internal connections are shown in Figure 3 for the IFC57AD and in Figure 4 for the IFC57BD APPLICATION Time overcurrent relays find ext...

Page 4: ...t the inception of a fault When determining the pickup setting for this unit the transient overreach must be taken into consideration The percent transient overreach should be applied to proportionately reduce the calculated pickup setting so that the instantaneous unit will not overreach a downstream device and thereby cause a loss of coordination in the system protection scheme The operating tim...

Page 5: ...hat latches up and remains exposed until it is released The same rest button that releases the target seal in unit also releases the target of the instantaneous unit A magnetic shield depicted in Figure 1 is mounted to the support structure to eliminate the proximity effect of external magnetic materials Both the High Seismic target and seal in unit and the High Seismic instantaneous unit have the...

Page 6: ...4 11 1 12 4 13 6 HIGH SEISMIC INSTANTANEOUS UNIT IFC57BD The instantaneous coil is tapped for operation at either one of two ranges H or The position of the link located on the top of the support structure determines whether the range is high or low See Figure 2 and Table VI L TABLE VI HIGH SEISMIC INSTANTANEOUS LINK UNIT AMPS POSITION CONTINUOUS RATING AMPS ft ttfONE SECOND RATING AMPS RANGE AMPS...

Page 7: ...peres anauxiliary relay should be used the connections beinf such the tripping current does not pass through the contacts or the target and seal in coils of the protective relay CONTACTS The current closing rating of the contacts is 30 amperes for voltages not exceeding 250 volts unit The current carrying rating is limited by the ratings of the seal in BURDENS Burdens for the time overcurrent unit...

Page 8: ... 0 5 0 H 10 50 10 0 058 0 020 0 062 0 060 0 059 0 058 6 3 0 0 092 0 065 0 112 0 079 0 068 0 066 L 6 6 150 50 H 30 150 30 0 018 0 004 0 019 0 018 0 018 0 018 CHARACTERISTICS TIME OVERCURRENT UNIT Pickup Pickup on these relays is defined as the current required to close the contacts from the 0 5 time dial position Current settings are made by means of two movable leads that connect to the tap block ...

Page 9: ...amage sustained in transit If injury or damage resulting from rough handling is evident file a damage claim at once with the transportation company and promptly notify the nearest General Electric Sales Office Reasonable care should be exercised in unpacking the relay in order that none of the parts are injured nor the adjustments disturbed If the relays are not to be installed immediately they sh...

Page 10: ...ON Should there be a need to tighten any screws to prevent stripping DO NOT OVER TIGHTEN DRAWOUT RELAY TESTING IFC relays may be tested without removing them from the panel by using either the 12XCA28A1 or 12XCA11A1 test probes The test probes make connections to both the relay and the external circuitry which provides maximum flexibility but requires reasonable care since a CT shorting jumper is ...

Page 11: ...r tap be used will not necessarily agree with the time current characteristics of Figure 5 and 6 if the relay has been adjusted to pick up at a value other than tap value because the torque level of the relay has been changed This adjustment also permits any desired setting intermediate If such adjustment is required It should be noted that the relay Time Setting The setting of the time dial deter...

Page 12: ...atings when applying current to the instantaneous unit The range of the instantaneous unit See Table VI must be obtained between a core position of 1 8 of a turn of full clockwise and 20 turns counterclockwise from the full clockwise position Do not leave the core in the full clockwise position HIGH SEISMIC TARGET AND SEAL IN UNIT The target and seal in unit has an operating coil tapped at 0 2 and...

Page 13: ...wn in Figures 3 and 4 Typical external connections are shown in Figure 7 INSTALLATION TESTS The following tests are to be performed at the time of installation Time Overcurrent Units Set the tap block to the desired tap setting and the time dial to the 0 5 position Using the test circuit in Figure 12 gradually apply current until the contacts just close This value of current is defined as pickup a...

Page 14: ...ct the test interval best suited to his individual requirements it is suggested that the points listed below be checked at an interval of from one to two years Until the user has These tests are intended to make sure that the relays have not deviated from their original settings If deviations are encountered the relay must be retested and serviced as described in this manual TIME OVERCURRENT UNIT ...

Page 15: ...tacts just closing at No 0 time setting there should be sufficient gap between the stationary contact brush and its metal backing strip to ensure approximately 1 32 inch wipe The pickup of the unit for any current tap setting is adjusted by means of a spring adjusting ring By turning the ring the operating current of the unit may be brought into agreement with the tap setting employed if for some ...

Page 16: ...the two screws securing it to the support structure See Figure 1 Moving the drag magnet towards the disk and shaft decreases the operating time and moving the drag magnet away from the disk and shaft increases the operating time The screws securing the drag magnet assembly to the support structure must be tight before proceeding with other time checks MECHANICAL ADJUSTMENT The disk does not have t...

Page 17: ... time test above 10 11 HIGH SEISMIC INSTANTANEOUS UNIT IFC57BD Both contacts should close at the same time 1 The backing strip should be so formed that the forked end front bears against the molded strip under the armature With the armature against the pole piece the cross member of the T spring should be in a horizontal plane and there should be at least 1 64 inch wipe on the contacts Check this ...

Page 18: ... prompt replacement of any that are worn broken or damaged When ordering renewal parts address the nearest Sales Office of the General Electric Company specify the quantity required the name of the part wanted and the complete model number of the relay for which the part is required 18 Courtesy of NationalSwitchgear com ...

Page 19: ... Seismic Instantaneous Unit 9 28 29 Time Current Characteristics of the High Seismic Instantaneous Unit Test Connections for Testing CT Secondary Used with the IFC Relay Test Connections for Testing Pickup and Operating Times of the IFC Relay Time Overcurrent Unit 10 30 11 12 31 Test Connections for Testing Pickup and Operating Times of the IFC Relay High Seismic Instantaneous Unit Test Connection...

Page 20: ...T TAP SELECTOR SCREW SEAL IN UNIT STATIONARY CONTACT V 0 9 t TIME DIAL MAIN MOVING CONTACT MAIN STATIONARY _ BRUSH AND CONTACT ASSEMBLY T I M E I N S T r SEAL IN TARGET t t N R A f i f r T i t s N 1 V SHIELD k y 7 j DRAG MAGNET 4 ASSEMBLY CONTROL SPRING ADJUSTING RING f j i m Figure 1 8043009 Type IFC57BD Relay Removed from Case Front View 20 Courtesy of NationalSwitchgear com ...

Page 21: ...SUPPORT STRUCTURE U MAGNET AND TAP BLOCK ASSEMBLY UNIT OVERCURRENT DISC CONTROL SPRING BOTTOM JEWEL BEARING r L7 l 8043013 Type IFC57BD Relay Removed from Case Rear View Figure 2 21 Courtesy of NationalSwitchgear com ...

Page 22: ...9948 T si NLUCTI N HI UNIT _L T T w i w M V M i V V v V V V A O o 6 12 i 0 O 1 5 SHORT FINGER Figure 3 0208A8514 1 Internal Connections for Relay Type IFC57AD Front View 22 Courtesy of NationalSwitchgear com ...

Page 23: ... y l V V x v j V V V v c o c 14 2 12 6 6 c c L 3 5 1 13 INSTANTANEOUS SETTINGS SET LINK TO H FOR HIGH RANGE AND Tr L FOR LOW RANGE LINK SHOWN IN HIGH RANGE POSITION SHORT FINGER Figure 4 0208A8515 1 Internal Connections for Relay Type IFC57BD Front View 23 Courtesy of NationalSwitchgear com ...

Page 24: ... X s 10 Y x 10 V x 9 i X S x 7 5 7 X 7 s XJ 5 6 5 X 4 X 4 5 4 X X o 4 3 z 3 3 2 2 UJ X X J Z s sX 1 1 s O i 0 I 0 I 7 UJ 7 s 5 I 0 5 I 4 4 2 3 3 2 TIME UNIT 2 Q 5 U ui 1 1 08 08 z 08 oa 07 U4 07 l 08 0 05 05 04 04 03 03 4 02 02 01 01 5 7 I 9 1 2 4 5 1 7 8 9 10 20 30 40 5 M 70 80Mg 8 S 8 S S S S 5 i m r m m i 1 1mu MULTIPLES OF PICK UP SETTING Figure 5 0108B8971 60 Hertz Time Current Characteristic...

Page 25: ...V I O X I 9 X X 7 7 8 x S X V V V 8 X X Sv 7 V 9 9 x VD x 5 4 4 x X V 2 X V 4 3 a X V x 3 N x LJ 2 2 N X X V z X x Q V 1 1 J 1 LU I I X 7 7 1 B 5 5 2 4 4 3 3 TIME U N I T 7 2 M a u u i 1 A 1 08 09 z 01 07 UI 09 07 0 0 I 05 05 04 04 03 03 02 02 01 30 40 50 W 70 BOM g o o a a a o a a o o o a a o o a n a r o o o o a o s I s i s m r m m o S 8 7 8 9 10 20 a 1 s 5 7 8 I 1 2 3 4 s o MULTIPLES OF PICK UP ...

Page 26: ... h D C TRIP BUS 5 I TSX 13 51 50N 5CN TSX 51 51 12 14 T SX 3 2 5 2 a ALARM OP REMOTE INDICATION 52 TC NOTE 50 DEVICE PRFSENT ONLY IN XBD MCDELS Figure 7 0275A3836 External Connections for IFC57AD or IFC57BD Relay 26 Courtesy of NationalSwitchgear com ...

Page 27: ...GEK 49948 UJ s z or LU a o U_ o z UJ O or UJ CL Z UJ 1 t UJ cc H r LLJ M U L T I P L E S O F P I C K U P o Figure 8 0269A1883 Overtravel Curves for Relay Type IFC57 27 Courtesy of NationalSwitchgear com ...

Page 28: ... LO 1 o x o h o 00 rt i rr CD MO s CD I t r CT CO O i oc UJ LQ Q _ rvi rr I f i ZZL i CO 1 CD G i 5 i m Cu 4 3o 1 HI SEISMIC MINIMUM PICK UP 7 3 4 t t r t o UJ i Q e ro o co 00 UJ 0 ID 5 3 rh O on c O P 3 CD c s 20 P 5 3 i CD CD i i PJ O i n c i rr i r r a rr 13 P I to Pi t O r CD MAXIMUM PICK UP HI SEISMIC t 4 l c O 1 I 10 90 0 60 40 50 7ft 80 30 20 ANGLE IN DEGREES LAG ...

Page 29: ...25 O s CD O O c O 3 ro rD 020 o CD ZD Z m 0 CTT zr CO 1 cn 00 1 CD LU O CO to m 3 7 015 I O r 4 LU CO VO 3 VO CD 3 6 h s o r c Q CD ZD 3 5 c O CD Cl 3 010 ZJ CL ri CD O O C zr IS P J c CD ZJ nQ Ct rl CD 005 00 c O to 9 10 6 7 8 4 5 3 1 5 2 MULTIPLES OF PICKUP ...

Page 30: ... A Y S I D E C A S E SIDE i sir C A S E S I D E s i 2 XGAIIAI 6 i L 12 X C A 11AI OR 6 5 1 2 X C A I I A 2 A T E S T C O N N E C T I O N S F O R T E S T I N G S E C O N D A R Y U S E D W I T H T H E I F C R E L A Y C T Figure 11 0269A1787 1 Test Connections for Testing CT Secondary Used with the IFC Relay 30 Courtesy of NationalSwitchgear com ...

Page 31: ...A 4 RELAY TERMINALS r G 2 t f i i i i i y RELAY sir E RELAY i IDE w 1 CASE CASE i SIDE ILACAIIAI I t C T JUMPER TEST OCNNECTIC OPERATING TIME 0 7ERGURRENT UNIT NiS FOR TESTING PICKUP AND THE IFC RELAY TIME r cr Z Figure 12 0269A1789 Test Connections for Testing Pickup and Operating Times of the IFC Relay Time Overcurrent Unit 31 Courtesy of NationalSwitchgear com ...

Page 32: ... c 4 o i RELAY SIDE C A SE SIDE R ELAY RELAY i SIDE f CASE SIDE IDE 3 i r CASE SIDE I 12 X CA 11AI Y 5 6 CT J U M P E R TEST CCMNECTICNS FOR TESTING PICKUP AND OPERATING TIMES OF THE iEC RELAY INSTANTANEOUS UNIT Figure 13 0269A1788 1 Test Connections for Testing Pickup and Operating Times of the IFC Relay High Seismic Instantaneous Unit 32 Courtesy of NationalSwitchgear com ...

Page 33: ...SIDE i i CASE SIDE l i i 12 X C A 11AI TEST CONNECTIONS FOR TESTING THE TARGET AND SEAL IN UNIT USED WITH THE IEC RELAY Figure 14 0269A1790 Test Connections for Testing the High Seismic Target and Seal In Unit Used with the IFC Relay 33 Courtesy of NationalSwitchgear com ...

Page 34: ...UT ELEMENT SUPPORT STRUCTURE CONNECTION PLUG CONTACT FINGERS RELAY CASE SHORTING BAR CASE CONNECTION BLOCK Figure 15 8042715 Cross Section of IFC Drawout Case Showing Shorting Bar 34 Courtesy of NationalSwitchgear com ...

Page 35: ...0 5 4 79MM 6 750 17I MM L I 4 i i IE MOUNTING SURFACE 2 644 __ 72MM E X T E R N A L CONNECTIONS 10 32 SCREWS 5 686 I 44MM 1 PANEL DPxILLlNG SEMI FLUSH MOUNTING SIDE VIEW SEMI FLUSH MOUNTING T I E SU PPORT OR TIE ANCHOR PANEL MAX 12 S THK 3MM WASHE R LOCKWASHER H Q 32 SCREW n 51 H C A B L E NUT TIE I 0 X 1 2 V TYPE B T T H READCUTTIN G SC R E W CABLES V IEW A I I 1 HD W 0257A 8 549 G f VI EW D Figu...

Page 36: ... REC SURFACE MOUNTING M A X 8 3 PANEL 5MM 3 688 94MM 8 344 2I2MM b Tl F 2T 219 v J 5MM HOLES MOUNTING SURFACEN WASHER A L KWASHER SEE VIEW C T 9 H T 2 3 7 5 SIMM 469 h I2MM C 7 i t I 9MM I c NUT f L 1 EXTERNAL CONNECTIONS 10 32 SC REWS 8 36 SCREW i 4 750 O O U O O O G 121 MM oO 0 po 3 0 625 I 6MM f i z x 3 7 i r 2 S PAC ER REMOVE K N O C K O U T O v 6 2 5 _ I6MM T Y P I C A L F0R 8MMH0LES PANEL DR...

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