GE IFC51A AND 518 Instructions Manual Download | Manualshive

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Summary of Contents for IFC51A AND 518

Page 1: ...INSTRUCTIONS i i I TIME OVERCURRENT RELAYS TYPES IFC51A AND 518 IFC53A AND 538 IFC77A AND 778 GEK 45375B SUPERSEDES GE K 45375A IU A _ _ J ii r i J 1 GENERAL ELECTRIC Courtesy of NationalSwitchgear com ...

Page 2: ...TTING 10 PICKUP TEST 10 TIME TEST 11 HI SEISMIC INSTANTANEOUS UNIT 11 SETTING THE HI SEISMIC INSTANTANEOUS UNIT 11 HI SEISMIC TARGET AND SEAL IN UNIT l I PICKUP AND DROPOUT TEST 11 INSTALLATION 12 INSTALLATION TESTS 12 TI ME OVERCURRENT UNIT 12 HI SEISMIC TARGET AND SEAL IN UNIT 12 HI SEISMIC INSTANTANEOUS UNIT 12 PERIODIC CHECKS AND ROUTINE MAINTENANCE 12 TIME OVERCURRENT UNIT 13 HI SEISMIC INSTA...

Page 3: ...des adequate fault protection The VERY INVERSE time characteristics Figure 7 and 2 1 of the IFC53A and IFC538 relays are likely to provide faster overall protection in applications where the available fault current magnitude remains fairly constant due to a relatively constant generating capacity The variation in the magnitude of fau lt current thru the relay is therefore mainly dependent upon the...

Page 4: ...cover support structure assembly and a connection plug to make up the electrical connection See Cover Figure and Figures 1 2 3 and 19 Figures 2 and 3 show the induction unit mounted to the molded support structure This disk is activated by a current operating coil mounted on either a laminated EE or U Magnet The disk and shaft assembly carries a moving contact wh ich completes the alarm or trip ci...

Page 5: ...n in an ambient air temperature from 20 C to 55 C Ranges for the time overcurrent unit are shown in Table l TABLE l I Current Range Amperes J Available taps for the time overcurrent unit are shown in Table 2 1 Taps Available A ll E_eres 0 5 4 0 0 5 0 6 0 7 0 8 1 0 l 2 l 5 2 0 2 5 3 0 4 0 l 12 ____l 1 5 2 0 2 5 3 0 4 0 5 0 6 0 7 0 8 0 10 0 12 0 The one second thermal ratings are listed in Table 3 J...

Page 6: ... of the high or low range is determined by the position of the link located on the top of the support structure See F igure 2 and Table 6 Hi Seismic Link _ ___ Continuous r On lns tantaneous Pos iti on Range Rating Second K n it__ _Am_ps_ ___ ____ ____ A_m_p _ __ A_m_ps_J_____ m t L 2 10 3 7 i 130 I 2 50 16 900 1 H __10 50 7 5 6 15 f___ L_ __6_ __ l O j 2 60 67 60 0 j __________J___H ____ 3_0_ _1_...

Page 7: ...g current exceeds 30 amperes an aux i liary re lay should be used the connections being such that the tripping current does not pass through the contacts or the target and seal in coils of the protective relay The current closing rating of the contacts is 30 amperes for voltages not exceeding 250 volts The current carrying rating is limited by the ratings of the seal in unit BURDENS Burdens for th...

Page 8: ...nt settings are made by means of two movable leads which connect to the tap block at the top of the support structure see Figure 1 The tap block is marked A through J A through M or A through N See the nameplate on the relay for tap settings Example The 2 amp tap for a 1 to 12 IFC77 time overcurrent relay requires one movable lead in position D and the other in position H Qperating Time Accur3 1_ ...

Page 9: ...age has been sustained in shipment and that the relay ca librations have not been disturbed If the examination or test ind icates that readjustment is necessary refer to the section on SERVICING These tests may be performed as part of the installation or acceptance tests at the discretion of the user Since most operating companies use different procedures for acceptance and installation tests the ...

Page 10: ...ipe The minimum current at which the contacts will just close is determ ined by the tap setting in the tap block at the top of the support structure See Characteristic section The pickup of the time overcurrent un it for any current tap setting is adjusted by means of a spring adjusting ring See Figure 1 The spring adjusting ring either winds or unwinds the spiral control spring By turning the rin...

Page 11: ...s when applying current to the instantaneous unit The range of the instantaneous unit See Table 6 must be obtained between a core position of 1 8 of a turn of full clockwise and 20 turns counterclockwise from the full c lockwise position Do not leave the core in the full clockwise position ll SEISMIC TARGET AND SEAL IN UNIT The target and seal in unit has an operating coil tapped at 0 2 and 2 0 am...

Page 12: ...the user Hi Se_ismic Target and Seal In Unit 1 Make sure that the tap screw is in the desired tap 2 Perform pickup and drop out tests as outlined in the Acceptance Test Section i Seismic Instantaneous Uni This relay must l Select the desired range by setting the link in the proper posit ion See F igure 1 and the Internal Connections Diagram Whenever possible always select the higher range since it...

Page 13: ... is found during installation or periodic testing that the time overcurrent unit is out of limits the unit may be recalibrated as follows Pickup Tests Rotate time dial to No 0 time dial setting and check by means of a lamp that the contacts just c1ose The point at whic the contacts j Jst close can be adjusted by running the stationary contact brush in or out by means of its adjusting screw This sc...

Page 14: ...rating 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 tfme checks Jl1ECHANICAL ADJUSTMENT The disk does not have to be in the exact center of either air gap for the relay to perform correctly Should the disk not clear all gaps the following adj...

Page 15: ...erting a 0 010 feeler gage between front half of the shaded pole with the armature held close Contacts should close with feeler gage in place 4 Since mechanical adjustments may affect the Seismic Fragility Leve 1 it is advised that no mechanical adjustments be made if seismic capability is of concern HI SEISMIC TARGET AND SEAL IN UNIT Check l and 2 as described under Instantaneous Unit To check th...

Page 16: ...T TAP SELECTORS INSTANTANEOUS UNIT MAIN MOVING CONTACT MAIN STATIONARY BRUSH AND CONTACT ASSEMBLY FIGURE l 8042708 TYPE IFC53B RELAY REMOVED FROM CASE FRONT VIEW DISK U MAGNET ANO TAP BlOCI ASSEMBLY TIME OVERCURRENT UNIT FIGURE 2 8042711 TYPE IFC53B RELAY REMOVED FROM CASE REAR VIEW 16 Courtesy of NationalSwitchgear com ...

Page 17: ...0 i 0 GEK 45375 EE MAGNET AND TAP BLOCK ASSEMBLY TIME OVERCURRENT UNIT FIGURE 3 8042750 TYPE IFC77B RELAY REMOVED FROM CASE REAR VIEW 17 Courtesy of NationalSwitchgear com ...

Page 18: ...IFC51A IFC53A AND IFC77A FRONT VIEW TSI TSI 1 l 1 T_ J r 2 SHORT FINGER IMllUCTI llMIT INST JV v 1 J I r lf T l14111 w Ml lll JllQ TO L Ft1 Ltw 1 Lllk 11tti1111 I MUii RAH l OSITIC ll FIGURE b 0257A8340 5 INTERNAL CONNECTIONS FOR RELAY TYPES IFC51B IFC53B AND IFC77B FRONT VIEW Indicates Revision 18 Courtesy of NationalSwitchgear com ...

Page 19: ... r i h 9 8 7 s h 4 a i I 2 I I 2i TIME UN11 r _ w lt l I 3 4 6 6 1 0 910 20 30 40 50 80 70 eoeoa MULTIPLES OF PICK UP CURRENT I 1 1 70 1 1 FIGURE 6 010888943 1 60 HERTZ TIME CURRENT CHARACTERISTICS FOR RELAY TYPES FC51A AND IFC51 B Indicates Revision 19 Courtesy of NationalSwitchgear com ...

Page 20: ...I 10 7 6 5 z 4 I I 3 J 2 a TIME UNIT w 5 6 7 o 0 1 I I 2 s e 1 s e10 20 30 4o o eo 100000 g MULTIPLES OF PICK UP SETTING _ __ _ 1 1 FIGURE 7 0108B8944 l 60 HERTZ TIME CURRENT CHARACTERISTICS FOR RELAY TYPES IFC53A AND IFC53B on I I 1 1 10 02 Courtesy of NationalSwitchgear com ...

Page 21: ...Hl l 1 H II 1 J l f l 1 j j j f j j J 1 f J H 1 l H l l li 1 H l l H 1 l l J H l l HC f f H I m11m E nugmmu l l J 1 1 B l U eamEEa mmm nm l 1 1 1 i 1 1 1 3 l H l l N lr l 1 l l l l l l H 11 t 1 l 1 H 4 1 l H H l l 1 H 4 H l 1 l 1 Hel 1 H i 1 1 l H I rn H 1 1 1 H HH l l l H 1 l H 1 1 1 H H l l l 4 H I 1 1 1 1 t t tt J_ TIME UNIT od l l l 1 1 1 l l H 1 1 H 1 l H l l l l l l H l l l l l f 1 03 m l 4 ...

Page 22: ... 2 1 1 5 r 50 3 fil r 1 t t t c v J r 52 llT FEEDER D C TRIP BUS FIGURE 9 0257A9647 0 EXTERNAL CONNECTIONS OF FOUR IFC RELAYS USED FOR MULTI PHASE AND PHASE TO GROUND FAULT PROTECTION OF A3 PHASE CIRCUIT 22 Courtesy of NationalSwitchgear com ...

Page 23: ...O u Cl w CL 0 GEK 45375 l _ u __ h l _ _ _ _ 1 TDS I MODEL 121FC 51 k OVERTRAVEL ___ ______ 7 f _Illt3 7 f TD 1 5 __ _ __ TDS I L r 5 10 15 20 25 30 35 40 MULTIPLES OF PJCK UP FIGURE 10 0257A8594 0 OVERTRAVEL CURVES FOR RELAY TYPE IFC51 Courtesy of NationalSwitchgear com ...

Page 24: ...I I 1 I i w 2 f 40 i I t 1 _i___ ____J__ ITDT3 20 1 l J__ _ _ _ __ _ 1 ID_ it 5 TDS l IJO 10 0 5 JO 15 20 2 5 30 35 40 MUl_TIPLES OF PICK UP FIGURE 11 0257A8595 0 OVERTRAVEL CURVES FOR RELAY TYPE IFC53 24 Courtesy of NationalSwitchgear com ...

Page 25: ...2 1 w z 21 1 0 w _I CL Wo 20 0 LL 1 0 a wi z OuJ 10 0 a w CL 0 GEK 45375 5 25 30 35 40 MUL TIPL ES OF PIGt UP FIGURE 12 0257A8596 0 OVERTRAVEL CURVES FOR RELAY TYPE FC77 25 Courtesy of NationalSwitchgear com ...

Page 26: ...ISMIC INSTANTANEOUS UNIT o 0 w f _ 0 HI SEISMIC RATED INSTANTANEOUS UNIT OPERATING TIME mm m OPERATING TIME i l l i r RANGE FOR ANY PICKUP SETTING FIGURE 14 0208A8695 0 TIME CURRENT CHARACTERISTICS OF THE HI SEISMIC INSTANTANEOUS UNIT 26 r __J I Courtesy of NationalSwitchgear com ...

Page 27: ...SED WITH THE IFC RELAY TO START ll1Mrn 1 t i ER Q 1 0 r rf0 INIMUM I RECOMMENDED VOLTS 20 AT 1 R RE oYo ____ _ _ J TO STOP fl MER 1 ro INDICATING Jo LIGHT WHEN t_ CHECK NG PICKUP RELAY 62 5 G TERMINALS RELAY RELAY SIDE SIDE GASE CASE SIDE SIDE 12XCAllAI 0 c 0 5 FIGURE 16 0269A1789 0 TEST CONNECTIONS FOR TEST NG PICKUP AND OPERATING TIMES OF THE IFC RELAY TIME OVERCURRENT UNIT 27 Courtesy of Nation...

Page 28: ...0 0 RELAY SIDE CASE SIDE 0 0 RELAYO SIDE ASE SIDE 5 _ JU ER FIGURE 17 0269Al788 l TEST CONNECTIONS FOR TESTING PICKUP AND OPERATING TIMES OF THE IFC RELAY HI SEiSMIC INSTANTANEOUS UNIT o c VOLTS VARIABLE RESISTOR RELAY I 2 TER MINALS RELAY SIDE CASE SIDE IZXCAllA1 0 0 FIGURE 18 0269Al790 0 TEST CONNECTIONS FOR TESTING THE HI SEISMIC TARGET AND SEAL IN UNIT USED WITH THE IFC RELAY 28 Courtesy of Na...

Page 29: ...NECTION PLUG CONTACT FINGERS RELAY CASE SHORTING BAR DRAWOUT ELEMENT SUPPORT STRUCTURE CASE CONNECTION BLOCK FIGURE 19 8042715 CROSS SECTION OF IFC DRAWOUT CASE SHOWING SHORTING BAR 29 Courtesy of NationalSwitchgear com ...

Page 30: ...ii 1 f r e 1 1 _ I r 2 10 l h 89 7 6 CJ 5 z 4 f _ _ H u 3 if _j 5 2 1 0 1 _ l l I 2 _g 07 w TIME UNIT I 7 B 9 I I 7 I 110 H O SO 70 UM I I P g MULTIPLES OF PICK UP SETTING FIGURE 20 010888973 0 50 HERTZ TIME CURRENT CHARACTERIST CS FOR RELAY TYPES IFC51A AND IFC51B 30 Courtesy of NationalSwitchgear com ...

Page 31: ...s I r _ 10 9 ff 1 s 7 r G z 5 4 f UJ 3 _J 2 2 0 1 1 r UJ I I 2 H TIME UNIT f _ 1 1 1 110 5JJ IG 70 HtO f I u l I HI MULTIPLES OF PICK UP SETTING FIGURE 21 010888974 0 50 HERTZ TIME CURRENT CHARACTERISTICS FOR RELAY TYPES FC53A AND IFC53B 3l 1000 200 70 7 1 I I z n i 01 Courtesy of NationalSwitchgear com ...

Page 32: ...r 89 _ t 7 z 6 r l 5 f I 1 f r L4 w 3 J K 2 0 w I l f 2 Tl ME UNIT __ I I 4 5 I 7 I t 10 20 30 40 10 00 10 IOtt MULTIPLES OF PICK UP SETTING I 1 _ 000 000 000 000 300 00 I iii H FIGURE 22 Ol08B8975 0 50 HERTZ TIME CURRENT CHARACTERISTICS FOR RELAY TYPES FC77A AND IFC77B 32 f i _ Courtesy of NationalSwitchgear com ...

Page 33: ...HD W 0257A8 549 G 1 GEK 45375 6 750 t72HM 5 562 142MM 2 781 71MM REAR VIEW E_A EL Q13J _i Lt SE 1 l USH_ HOlJ__ Tl_f JG STUD NUMBERING FIGURE 23 0257A8452 2 SHEET 1 OUTLINE AND PANEL DRILLING FOR RELAY TYPES FC51 IFC53 AND IFC77 33 Courtesy of NationalSwitchgear com ...

Page 34: ...ECTIONS 10 32 SCREWS MOUN TI NG SURFACE SIDE VIEW REC SURFACE MT G FOR HK PANELS AND ABOVE l r 3 062 78MM L 3 6 88 94MM I _____t D 2 781 l 71MM 6 124 rzr z 156MM 1QJ211191 11111 l l D ll 0 0 0 D i REAR VIEW 0 ERING SPACER REMOVE l NOCKOUT NLARGED VIEW C HOW 0257A8549 G 2 FIGURE 24 0257A8452 l SHEET 2 OUTLINE AND PANEL DRILLING FOR RELAY TYPES IFC51 1FC53 AND lFC77 34 i r 11 01 Courtesy of National...

Page 35: ...EL CURVES 25 13 HI SEISMIC INSTANTANEOUS UNIT TRANSIENT OVERREACH CHARACTERISTICS 26 14 HI SEISMIC INSTANTANEOUS UNIT TIME CURRENT CHARACTERISTICS 26 15 TEST CONNECTIONS CT TESTING 27 16 TEST CONNECTIONS TIME OVERCURRENT UNIT 27 17 TEST CONNECTIONS HI SEISMIC INSTANTANEOUS UNIT 28 18 TEST CONNECTIONS HI SEISMIC TARGET AND SEAL IN UNIT 28 19 CROSS SECTION OF IFC DRAWOUT CASE CONNECTIONS 29 20 INVER...

Page 36: ...GENERAL ELECTRIC COMPANY POWER SYSTEMS MANAGEMENT BUSINESS DEPT PHILADELPHIA PA 19142 GENERAL ELECTRIC 11 76 9 78 Courtesy of NationalSwitchgear com ...

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