GE 51BD53BD77BD51B, Instructions Manual

Page 1: ...INSTRUCTIONS GEK 49827A INSERT BOOKLET GEK 45375 OVERCURRENT RELAYS TYPES IFC51AD and 51BD IFC53AD and 53BD IFC77AD and 77BD GENERAL ELECTRIC Courtesy of NationalSwitchgear com ...

Page 2: ...Courtesy of NationalSwitchgear com ...

Page 3: ...all respects to those covered by the APPLICATION section in the included instructions GEK 45375 Note that the second contact on the seal in unit and the instantaneous overcurrent unit when present is intended for local alarm and or remote indication as shown on the typical external connections in Figure 3 of these instructions All other sections of the included book GEK 45375 also apply to these r...

Page 4: ...DUCTION UNIT HI T SI T SI i i v M V V V V V T V o o 0 12 2 6 A O O 1 1 1 5 SHORT FINGER FIG 1 0208A8514 ll INTERNAL CONNECTIONS FOR RELAY TYPES IFC51AD IFC53A0 AND IFC77AD FRONT VIEW 4 Courtesy of NationalSwitchgear com ...

Page 5: ...V o c o c 2 12 6 14 O o o o o 3 1 5 11 13 INSTANTANEOUS SETTINGS SET LINK TO Hw FOR HIGH RANGE AND TO L P0R LOW RANGE LINK SHOWN IN HIGH RANGE POSITION K SHORT FINGER FIG 2 0208A8515 1 INTERNAL CONNECTIONS FOR RELAY TYPES IFC51BD IFC53BD AND IFC77BD FRONT VIEW 5 Courtesy of NationalSwitchgear com ...

Page 6: ...ALARM BUS S 1 51 1 j TSI n151 1 13 51 2 51 3 51 N JT5jTl 1 hQ 50 7 ST j 5tl T50 1 SAME AS PHASE 1 T 50 1 12 T 14 2 3 ALARM JR REMOTE INDICATION 52 PHASES 2 3 AND NEUTRAL SAME AS PHASE 1 TC FIG 3 0275AI903 0 EXTERNAL CONNECTIONS OF FOUR IFC RELAYS USED FOR MULTI PHASE AND PHASE TO GROUND FAULT PROTECTION OF A 3 PHASE CIRCUIT 6 Courtesy of NationalSwitchgear com ...

Page 7: ...IFC TOC SETTINGS TAPS AVAILABLE G S OJ AZ r ts fi 3 3 P A C C PC SIAO 1 X L L rH n A J J IFC 5V BD 3 A 3 A A A FC 7 7 B P c r 3 IFC 53BD 1 ft 77AP 1 PC 77B D Revised since last issue 7 Courtesy of NationalSwitchgear com ...

Page 8: ...GENERAL ELECTRIC COMPANY POWER SYSTEMS MANAGEMENT BUSINESS DEPT MALVERN PA 19355 GENERAL ELECTRIC 6 91 1300 Courtesy of NationalSwitchgear com ...

Page 9: ...K 45375J INSTRUCTIONS TIME OVERCURRENT RELAYS Types IFC51A and 51B IFC53A and 53B IFC77A and 77B GE Protection and Control 205 Great Valley Parkway Malvern PA 19355 1337 Courtesy of NationalSwitchgear com ...

Page 10: ...SPECTION DRAWOUT RELAY TESTING GENERAL POWER REQUIREMENTS TIME OVERCURRENT UNIT HIGH SEISMIC INSTANTANEOUS UNIT HIGH SEISMIC TARGET AND SEAL IN UNIT 11 11 11 12 12 12 13 14 INSTALLATION INSTALLATION TESTS 15 15 PERIODIC CHECKS AND ROUTINE MAINTENANCE TIME OVERCURRENT UNIT HIGH SEISMIC INSTANTANEOUS UNIT HIGH SEISMIC TARGET AND SEAL IN UNIT CONTACT CLEANING COVER CLEANING SYSTEM TEST 16 16 16 16 16...

Page 11: ...for the IFC51B 53B and 77B APPLICATION Time overcurrent relays are used extensively for the protection of utility and industrial power distribution systems and frequently for overload backup protection at other locations The EXTREMELY INVERSE time charactersisties Figures 10 and 22 of the IFC77A and 77B relays are designed primarily for use where they are required to coordinate rather closely with...

Page 12: ... position to the fully open position when set at the number 10 time dial At lower time dial settings the reset times are proportionately lower The reset time of all VERY INVERSE and EXTREMELY INVERSE relays is approximately 60 seconds The reset time of all INVERSE relays covered by these instructions is approximately 12 seconds When setting these relays to coordinate with downstream relays a coord...

Page 13: ...letes the alarm or trip circuit when i t touches a stationary contact The disk assembly is restrained by a spiral spring to give the proper contact closing current Its rotation is retarded by a permanent magnet mounted in a molded housing on the support structure The disk and shaft assembly carries a moving contact which The drawout connection test system for the Cl case shown in Figure 19 has pro...

Page 14: ...l magnetic materials Both the High Seismic target and seal in unit and the High Seismic instantaneous unit have the letters Hi G molded into their target blocks to distinguish them as High Seismic units Seismic Fragility Level exceeds peak axial acceleration of log s 4g ZPA when tested using a biaxial multi frequency input motion to produce a Required Response Spectrum RRS in accordance with the I...

Page 15: ...C53 IFC77 1 6 1 8 2 0 2 1 2 3 2 7 3 0 3 5 4 0 4 5 5 0 3 8 4 0 4 2 4 4 4 7 5 0 5 3 5 8 6 2 6 6 7 1 2 5 2 7 3 0 3 2 3 6 4 0 4 5 5 2 5 9 6 5 7 5 TABLE V 1 0 12 0 Ampere Range Ratings Tap Model 1 0 1 2 1 5 2 0 2 5 3 0 4 0 5 0 6 0 7 0 8 0 10 0 12 0 IFC51 3 7 4 1 4 6 5 3 6 0 6 5 7 6 8 5 9 3 10 0 10 8 12 1 13 2 IFC53 6 8 7 1 7 7 8 3 8 8 9 4 10 3 11 0 11 6 12 4 12 6 13 5 14 4 IFC77 5 8 6 4 7 2 8 4 9 4 10 ...

Page 16: ...unit coil see Tables III IV V and VI to determine the current limiting element for both continuous and short time ratings HIGH SEISMIC TARGET AND SEAL IN UNIT Ratings for the target and seal in unit are shown in Table VII TABLE VII Tap 0 2 2 DC Resistance 10 ohms Min Operating Amps 0 60 Carry Continuous Amperes Carry 30 Amps for sec Carry 10 Amps for sec 60 Hz Impedance ohms 8 0 0 24 0 2 2 0 0 3 3...

Page 17: ...n are those for minimum tap of each range the impedance for other taps at pickup current tap rating varies inversely approximately as the square of the tap rating For example an IFC77 60 Hz relay with 0 5 4 0 amp range has an Impedance of 2 82 ohms on the 0 5 amp tap The impedance of the 2 0 amp tap is 0 5 2 0 2 x 2 82 0 176 ohms The High Seismic instantaneous unit burdens are listed in Table IX T...

Page 18: ...ntacts are just closed when the time dial is set to 0 The maximum time setting occurs when the time dial is set to 10 and the disk has to travel its maximum distance to close the contacts Reset The unit resets at 90 of the minimum closing current Reset times are proportionate to the time dial settings The time to reset to the number 10 time dial position when the current is reduced to 0 is approxi...

Page 19: ...n or of the acceptance tests at the discretion of the user Since most operating companies use different procedures for acceptance and installation tests the following section includes all applicable tests that may be performed on these relays VISUAL INSPECTION Check the nameplate stamping to insure that the model number rating and calibration range of the relay received agree with the requisition ...

Page 20: ...i t is essential to use a sine wave of current and or voltage The purity of the sine wave i e its freedom from harmonics cannot be expressed as a finite number for any particular relay however any relay using tuned circuits R L or RC networks or saturating electromagnets such as time overcurrent relays would be essentially affected by non sinusoidal waveforms Hence a resistance 1imi ted circuit as...

Page 21: ... primary adjustment for the time of operation of the unit is made by means of the time dial permanent magnet along its supporting shelf moving the magnet toward the disk and shaft decreases the time while moving it away increases the time However further adjustment is obtained by moving the Pickup Test Using the test Set the relay at 0 5 time dial position and the lowest tap connections in Figure ...

Page 22: ...an operating coil tapped at 0 2 and 2 0 amperes The relay is shippped from the factory with the tap screw in the higher ampere position The tap screw is the screw holding the right hand stationary contact To change the tap setting first remove one screw from the left hand stationary contact and place i t in the desired tap Next remove the screw from the undesired tap and place i t on the left hand...

Page 23: ...pply current until the contacts just close should be within 3 of tap value for 60 Hz relays and within 7 5 of tap value for 50 Hz relays This value of current is defined as pickup and Check the operating time at some multiple of tap value and the desired time dial setting This multiple of tap value may be 5 times tap rating or the maximum fault current for which the relay must coordinate This valu...

Page 24: ...scribed in this manual I f deviations are encountered the relay must be TIME OVERCURRENT UNIT 1 Perform pickup test for the tap setting in service as described in the INSTALLATION section 2 Perform the time tests as described in the INSTALLATION section HIGH SEISMIC INSTANTANEOUS UNIT Check that the instantaneous unit picks up at the desired current level as outlined in the ACCEPTANCE TESTS sectio...

Page 25: ...rew screw should be held securely in its support This With the contacts 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 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 brou...

Page 26: ...seconds in the middle of its travel loosening the two screws securing i t 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...

Page 27: ...he assembly and positioning i t according to the Time Test above page 18 10 11 HIGH SEISMIC INSTANTANEOUS UNIT 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 ...

Page 28: ...possible give the General Electric requisition number on which the relay was furnished If Since the last edition changes have been made in Figures 23 24 TABLE II SEE PAGE 6 12IFC51 TAPS AVAILABLE 0 5 0 6 0 7 0 5 1 2 1 5 2 2 5 3 4 1 Y y Y Y Y Y Y Y Y Y Y 6 1 1 2 1 5 2 2 5 3 4 5 7 8 12 10 Y Y Y Y Y Y Y Y Y Y Y Y Y 12IFC53 TAPS AVAILABLE 0 5 0 6 0 7 0 5 1 2 1 5 2 2 5 4 1 3 1 2 1 5 2 2 5 3 4 5 6 7 8 1...

Page 29: ...US UNIT SEAL IN UNIT STATIONARY CONTACT MAIN MOVING CONTACT SHIELD MAIN STATIONARY BRUSH AND CONTACT ASSEMBLY SEAL IN TARGET CONTROL SPRING ADJUSTING DRAG MAGNET RING Figure 1 8042708 Type IFC53B Relay Removed from Case Front View UMAGNET AND TAP BLOCK ASSEMBLY TIME OVERCURRENT UNIT SUPPORT STRUCTURE Figure 2 8042711 Type IFC53B Relay Removed from Case Rear View 21 Courtesy of NationalSwitchgear c...

Page 30: ...GEK 45375 SUPPORT STRUCTURE SHADING EE MAGNET AND TAP BLOCK ASSEMBLY TIME OVERCURRENT UNIT Figure 3 8042750 Type IFC77B Relay Removed from Case Rear View 22 Courtesy of NationalSwitchgear com ...

Page 31: ...51A IFC53A and IFC77A Front View TSl 1 IftMKTl MMT 1 TSl INST wv MIST j ar H L l y y V 4 V iUST 111141 SCT LMHf H V V F 11 MNE AM TO L F 6 6 LOW NAME LINK 2 A SHOW Ml ON o 0 RAME MOSITIOH 3 S SHORT FINGER Figure 5 0257A8340 5 Internal Connections for Relay types IFC51B IFC53B and IFC778 Front View 23 Courtesy of NationalSwitchgear com ...

Page 32: ...0 20 10 7 I tn H 5 Q 2 z m o 4 u 2 U m cn 3 n z o O Ld Z S 2 O P 2 w 1 1 7 A J J J J J 1 1 00 07 00 JS 09 JB4 J3 03 02 02 0 1 30 40 50 00 70 0000 3 J 7 Ji1 4 5 6 7 0 0 10 20 3 2 g mil g o 8 O O 0 0 1 0 o o o O i o o o o o e e v m M MULTIPLES OF PICK UP CURRENT Figure 6 0108B8943 2 60 Hertz Time Current Characteristics for Relay Types IFC51A and IFC51B 24 Courtesy of NationalSwitchgear com ...

Page 33: ...O m 100 MO i TM 7M too 50 5 400 4 I 300 3 200 2 100 M 30 20 10 9 0 H 5 2 n 2 co n n o z o cn t 0 7 5 1 oi 07 09 04 03 02 01 o S S g 8 8 8 8 Q o o e O a Q n B P o i 8 MULTPLES OF PICK UP SETTING Figure 7 0108B8944 3 60 Hertz Time Current Characteristics for Relay Types IFC53A and IFC53B 25 Courtesy of NationalSwitchgear com ...

Page 34: ... 3 cn Z Y V A n v o UJ O 2 Z P 3 o 2 Vv V C i v A V k V 1 v i V V 1 i s X x v N V XXI v V V x A v V V X s J SS 0 K I J 7 X 5 k 4 1 kJ 1 s X 00 0 3 M X X 2 M M JS Q kj M3 X k TIME UNIT M 2 9 2 0 1 5 J 7 0 J 1 2 3 4 5 6 7 8 0 10 20 30 40 50 00 70 00MS S i l l 3 2 3 3 1 1 i 11 Sill N MULTIPLES OF PICK UP SETTING Figure 8 0108B8945 2 60 Hertz Time Current Characteristics for Relay Types IFC77A and IFC...

Page 35: ...SI 51 2 51 3 5t N 50 2 50 3 50 N SAME AS PHASE I 1 51 1 51 1 50 1 J S I 2 3 L 52 a 52 TC i T Figure 9 0257A9647 0 External Connections of Four IFC Relays Used for Multi Phase and Phase to Ground Fault Protection of a 3 Phase Circuit 27 Courtesy of NationalSwitchgear com ...

Page 36: ... m o ro Q_ Z in CM o CL LL O O LD LL J a i 3 O o o o o o o CM K 3 in St 31 Nil 9NllV d3dO dO N 39d3d NI 3IAJI1 13AVdld3A0 Figure 10 0257A8594 2 Overtravel Curves for Relay Type IFC51 28 Courtesy of NationalSwitchgear com ...

Page 37: ...O uD K O ro CL VO 3 OJ I o OL O Li l o n UJ j iT 0 r 3 3 2 O IT O 31AII1 9N lVd3dO 30 N33d3d Nl 31 MII 33AVdld3A0 Figure 11 0257A8595 2 Overtravel Curves for Relay Type IFC53 29 Courtesy of NationalSwitchgear com ...

Page 38: ...O ro CL ID 3 C O CL O U oJ o tf LL CL H 3 O ID O O O O o o o ID K c j 3IAJI1 9NllV33dO 30 IN39d3d Nl 3IA1I1 33AVdid3A 0 Figure 12 0257 A8596 2 Overtravel Curves for Relay Type IFC77 30 Courtesy of NationalSwitchgear com ...

Page 39: ...KUM PICK UP HI SEISMIC T 10 0 20 U0 60 30 50 90 7D 80 ANGLE IN DEGREES LAG Figure 13 0208A8694 2 Transient Overreach Characteristics of the High Seismic Instantaneous Unit HI SEISMIC RATED INSTANTANEOUS UNIT OPERATING TIME 0 2 0 8 A 8 6 9 5 o B o LU n Li f Z a 2 o 010 7 CL ODE 9 6 10 7 8 5 4 3 I 5 2 MULTIPLES OF PICKUP Figure 14 0208A8695 1 Time Current Characteristics of the High Seismic Instanta...

Page 40: ...Secondary Used with the IFC Relay TC START TIMER VARIABLE RESISTOR CK O MINIMUM RECOMMENDED VOLTS 120 AT RATED FREQ Z 3 TO STOP TIMER TO INDICATING LIGHT WHEN CHECKING PICKUP 5 G RELAY I TERMINALS F 2 o RELAY SIDE CASE SIDE RELAY SIDE CASE SIDE o I2 XCAIIAI o O 5 6 C T UMPER Figure 16 0269A1789 0 Test Connections for Testing Pickup and Operating Times of the IFC Relay Time Overcurrent Unit 32 Cour...

Page 41: ...IDE CASE SIDE CASE SIDE o o I2 XCAIIAI o o V 5 6 CT JUMPER Figure 17 0269A1788 1 Test Connections for Testing Pickup and Operating Times of the IFC Relay High Seismic Instantaneous Unit VARIABLE RESISTOR D C VOLTS RELAY TERMINALS 2 o o RELAY SIDE CASE SIDE o I2 XCAIIAI o igure 18 0269A1790 0 Test Connections for Testing the High Seismic Target and Seal in Unit Used with the IFC Relay 33 Courtesy o...

Page 42: ...G K 45375 CONNECTION CONTACT MGERS XX RELAY CASE SHORTING BAR CASC C0 l rtON BLOCK Fi gure 19 8042715 Cross Secti n of IFC ramut Case Showin9 Shorting Bar 34 Courtesy of NationalSwitchgear com ...

Page 43: ...10 70 00 so 40 30 20 7 0 3 4 3 2 1 0 1 7 0 I 4 3 2 V a u ui 1 z M S 07 U4 09 02 5 7 t I 1 2 4 S t 7 0 10 30 40 30 M 7090002 8 8 1 8 8 8 8 8 8 r m A B 1 i i i i l l i MULTIPLES OF PICK UP SETTING Figure 20 0108B8973 0 50 Hertz Time Current Characteristics for Relay Types IFC51A and IFC51B 35 Courtesy of NationalSwitchgear com ...

Page 44: ...GEK 45375 Figure 21 0108B8974 0 50 Hertz Time Current Characteristics for Relay Types IFC53A and IFC53B 36 Courtesy of NationalSwitchgear com ...

Page 45: ... 2 2 i Y Y A V i 1 X v r o 1 9 v 3 AXv 7 7 A v 1 1 V J 5 5 V X X X K v x X V 4 4 1 XVV V Y VA S X v 1 3 S 1 0 V 9 s 9 o 2 N V 7 N z 4A Hi V 6 x 5 LU 4 x 1 HI in 1 V 3 Z X M X x 7 U4 7 2 o 04 11 H UJ 2 4 n 2 T I M E U N I T 2 3 40 50 M 70 0 S S 3 3 3 IIII i i i i HU 20 5 7 9 1 4 5 7 9 10 MULTIPLES OF PICK UPSETTING Figure 22 0108B8975 0 50 Hertz Time Current Characteristics for Relay Types IFC77A a...

Page 46: ...UTDUT 6 750 1 71MM 6 188 157MM i i 3 3 094 79MM t 3 375 86MM 0 EXTERNAL CONNECTIONS 10 32 SCREWS 2 844 72MM 5 688 MOUNTING SURFACE SIDE VIEW 144MM PANEL DRILLING SEMI FLUSH MOUNTING TIE SUPPORT OR PANEL MAX 125 THK TIE ANCHOR WASHER LOCKWASHER 8 32 SCREW NUT r 3MM r l I h 10 32 SCREW THREADCUTTING I h r11 I I CABLE TIE CABLES VIEW A HDW 0257A8549 G 1 Figure 23 0257A8452 Sheet 1 6 Outline Panel Dri...

Page 47: ...MM THK MAX PANEL LOCK WASHER 8 36 SCREW 8 344 REMOVE KNOCKOUT NUT 212MM 3 688 94MM 2 375 i 61MM c OVERSIZE WASHERS VIEW B n i HDW 0257A8549 G2 C 469 SEE VIEW C MOUNTING SURFACE WASHER LKWASH fi 1 2MM 4 750 4 o o c 750 f EXTERNAL CONNECTIONS 10 32 SCREWS T9MM e c o Ti e Q L 1 o o o 625 T 16MM 2 219 HLS 5MM 625 TYP 1 6MM FOR 312 HLS MOUNTING SURFACE SIDE VIEW NUT l 156 4MM 8MM SPACER 4 REMOVE KNOCKO...

Page 48: ...Courtesy of NationalSwitchgear com ...

Page 49: ...gh Seismic Instantaneous Unit Transient Overreach Characteristics 31 14 High Seismic Instantaneous Unit Time Current Characteristics 31 15 Test Connections CT Testing 32 16 Test Connections Time Overcurrent Unit 32 17 Test Connections High Seismic Instantaneous Unit 33 18 Test Connections High Seismic Target and Seal In Unit 33 19 Cross Section of IFC Drawout Case Connections 34 20 Inverse 50 Hert...

Page 50: ...å å å å 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 ...