GE IFC53M Instructions Manual Download

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Summary of Contents for IFC53M

Page 1: ...INSTRUCTIONS TIME OVERCURRENT RELAY TYPE IFC53M GEK 65572 Supplement to GEK 45375 GENERAL 1 ELECTRIC ...

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Page 3: ...peration on either of two ranges H or L Selec tion of the high or low range is accomplished by means of a range selection link located on the top of the support structure TABLE 1 Tap Continuous One Second K Unit Position Range Rating Rating Pjnps mps L 2 4 1 9 2 8 70 4900 H 4 8 3 0 L 4 8 4 3 4 16 140 19600 H 8 16 6 9 L 10 20 9 0 10 40 275 75500 H 20 40 16 2 L 20 40 12 6 20 80 275 75500 H 40 80 20 ...

Page 4: ... ring CD is attached must always be turned in the clockwise direction top view This will prevent the sleeve and shading ring assembly from being loosened The unit will pick up at the scale plate marking plus or minus five percent with gradually applied current The operating time is shown in Fig 4 Fig S shows transient overreach characteristics The Hi Seismic high dropout instantaneous unit burdens...

Page 5: ...RCURRENT UNIT E AL N T AROFT TAP SE LCT DR Fig 1 8043607 TAP SELECTION BLOCK INSTANTANEOUS UNIT RANGE SELECTION LINK SEAL IN TARGET FOR INSTANTANEOUS OVERCURRENT UNIT SEAL IN TARGET TAP SELECTOR SCREW Type IFC53M Relay Renoved fro Cise Front lew N 5 ...

Page 6: ... INS IANTANEOUS HIGH DROPOUT UNIT WITH ADJUSTABLL CORE M AG N El ASSEMBL FOR TIME OVERCURREN UNIT Fig 2 8O436O8 Type IFC53M Relay Removed from Case Rear View 6 ...

Page 7: ...ADiUSABLE CORE A LOCKNUT B tL E SHADING RiNG D Fi 1 3 8O3b363 Construction of the high Dropout Instantaneous Linit 1 ...

Page 8: ... 030 0 025 o c20 0 015 0010 o 005 MULTIPLES OF PICK UP 0 LI U LI D 0 OPERATING TIME RANGE FOR ANY PICKUP SETTING 0 0 1 2 3 4 5 6 7 8 9 10 F UbR7 5 O erting Ti e Vrsus Current for the Hich Dropout Instantaneous int ...

Page 9: ...f i H 4 4 r t t f 44 H 4 4 H it i 1 Tfl1f 4 4H Ii I 4 4 44 4 I j 4 _ 4 _ _ T t 4 if f Vt f 15 4 3 IT tf tY t f E h H 1 ftt 4 41 ii 4 4 jiL j 1 TEETTr L1ih t t r t I t t I CALm ll Fit IT ti Ir f f tfI II H f4 b I 7c i t i H f H i H u MAX CALTh H 4 4 H f 4 I 1 4 1 _ 1_ j i 4 I j H 4 tfl I s A H tt f T t__ t 4 I I It f i r lo 11 fZZl44 4 1 4 1 1 ii F 1_I 4 1 f 1 o H 20 LI4 I 1W I 4 1 1 30 tttfii 140 ...

Page 10: ...GEK 65572 LNSTANTANEOUS HI DROPOUT N SHORT FINGER Fig 6 o275A4554 a Internal Connection Diagram for Type IFC53M Relays INDUCT ION SI 2 0 10 ...

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Page 12: ...GE Power Management 215 Anderson Avenue Markham Ontario Canada L6E 1B3 Tel 905 294 6222 Fax 905 201 2098 www ge comlindsyslpm ...

Page 13: ...GEK 45375J TIME OVERCURRENT RELAYS Types IFC51A and 51B IFC53A and 53B IFCJ7A and 778 INSTRUCTIONS GE Protection and Control 205 Great Valley Parkway Malvern PA 19355 1337 ...

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

Page 15: ... 77A and in Figure 5 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 charactersistics Figures 10 and 22 of the IFC77A and 77B relays are designed primarily for use where they are required to coordinat...

Page 16: ...ntacts fully closed 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 downst...

Page 17: ... or a i Magnet The disk and shaft assembly carries a moving contact which completes the alarm or trip circuit when it 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 drawout connection test system for the Cl case shown in...

Page 18: ...effect of external 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 acco...

Page 19: ... 5 3 0 4 0 4 1FC51 1 6 1 8 2 0 2 1 2 3 2 7 3 0 3 5 4 0 4 5 5 0 1FC53 3 8 4 0 4 2 4 4 4 7 5 0 5 3 5 8 6 2 6 6 7 1 1FC77 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 IFCS1 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 1FC53 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 41 1FC77 5...

Page 20: ...ime overcurrent 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 8 0 0 24 Mm Operating Amps 0 60 0 2 2 0 Carry Continuous Amperes 0 3 3 Carry 30 Amps for sec 0 03 4 Carry 10 Amps for se...

Page 21: ...edance values given 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 1FC77 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 li...

Page 22: ...rating time The contacts 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 reduc...

Page 23: ...the installation 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 t...

Page 24: ...rly test AC relays it 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 l...

Page 25: ...m time setting The primary adjustment for the time of operation of the unit is made by means of the time dial However further adjustment is obtained by moving the permanent magnet along its supporting shelf moving the magnet toward the disk and shaft decreases the time while moving it away increases the time Pickup Test Set the relay at 0 5 time dial position and the lowest tap Using the test conn...

Page 26: ... seal in unit has 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 it in the desired tap Next remove the screw from the undesired tap and place it ...

Page 27: ...gure 16 gradually apply current until the contacts just close This value of current is defined as pickup and should be within 3 of tap value for 60 Hz relays and within 7 5 of tap value for 50 Hz relays 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 c...

Page 28: ...ons are encountered the relay must be retested and serviced as described in this manual 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 ACCEPTA...

Page 29: ... its adjusting screw This screw should be held securely in its support 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...

Page 30: ... 78 1 31 or 0 92 seconds The drag magnet assembly should be approximately in the middle of its travel The drag magnet assembly is adjusted by loosening 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...

Page 31: ... after securely seating the assembly and positioning it according to the Time Test above page 18 HIGH SEISMIC INSTANTANEOUS UNIT 1 Both contacts should close at the same time 2 The backing strip should be so formed that the forked end front bears against the molded strip under the armature 3 With the armature against the pole piece the cross member of the T spring should be in a horizontal plane a...

Page 32: ...c Company specify quantity required name of the part wanted and give complete model number of the relay for which the part is required If possible give the General Electric requisition number on which the relay was furnished Since the last edition changes have been made in Figures 23 24 TABLE II SEE PAGE 6 121FC51 TAPS AVAILABLE 121FC53 TAPS AVAILABLE 1 2 15 4 YVL LVY XL L Y 121FC77 TAPS AVAILABLE...

Page 33: ...042708 Type IFC53B Relay Removed from Case Front View SUPPUOI I UHE Figure 2 8042711 BuICK ASSEMBLY TIVIE OVEHCUBHENT UNIT Type 1FC538 Relay Removed from Case Rear View TAP SELECTOR BLOCK TOP PIVOT TIME OVERCURRENT _ TIME DIAL INSTANTANEOUS UNIT MAIN MOVING CONTACT MAIN STATIONARY BRUSH AND CONTACT ASSEMBLY SEAL IN TARGET j DRAG CONTROL SPRING MAGNET ADJUSTING RING 21 ...

Page 34: ...GEK 45375 SUPPORT STRUCTURE Figure 3 8042750 Type IFC77B Relay Removed from Case Rear View EE MAGNET AND TAP BLOCK ASSEMBLY TIME OVERCURRENT tJNT 22 ...

Page 35: ...Connections for Relay Types IFC51A IFC53A and IFC77A Front View flUCTI we I 1 INST L LtiI lET LIII F1 11 t4E AU TO F LIW IMI L II ii wia i egc POSITI Figure 5 0251A8340 5 Internal Connections for Relay types IFC51B 1FC538 and IFC77B Front View CIT 1 4 3 1ORT FINGEk 5 23 ...

Page 36: ...TIME IN 5EUNDS 1 CD C ED I a ED o cC CD El CD I C LY1 El C 0 CD S N 1 C C S S CD C El S C CD S C LI C rn C C n C Q rn Cr 0 Il o C C 0 C C xi m z 1 SGlOD3S M 3 l1 ...

Page 37: ... ODOI no 0001 IDOL I U IlL UI DI lOb C I L J a 0 iV Li J J 4 1 r 1r 1 r r t C 4 C I C C CD CD 4 LC C L1 I D c C C I I L N U C CD C IC 0 5 co 0 CD CD 1 LI C 1_ I cD z XI II Ii 1 C a U 0 n w J a j D I I H F w F OSOD1S NI lFNIL ...

Page 38: ...8B8945 2 60 Hertz Time Current Characteristics for Relay Types IFC77A and IFC77B 201 101 01 1L 38 7 2I ii 5C 38 It 20 10 IL 10 1tT i 2 NtNJ tiJi110 2 I1 SEL H t1 N I Is IN K kTh I 4 h 1 LIX N41 1 It 8 1 k 0 N NItj è N 44 _____________________ 2 TIME UNIT HH WH 1 3 4 2 0 1 0 III 21 30 40 ID II 72 4 ri 1 0 z U 26 ...

Page 39: ...GEK 45375 A C BUS Figure 9 0257A9641 O External Connections of Four IFC Relays Used for Multi Phase and Phase to Ground Fault Protection of a 3 Phase Circuit FEE OER RIP BUS 27 ...

Page 40: ...MULTIPLES OF PICK UP 50 5 rD C C co 0 C 5 r _5 5 D I 0 5 3 ID cJ 1 0 It 0 30 w H ci wa LL F 0 w iw U ct w a 20 1 ____ 7z z T D 5 10 U U 0 5 0 25 30 35 40 ...

Page 41: ...GE K 45375 Figure 11 0257A8595 Overtravel Curves for Relay Type 1FC53 a H I fl a 0 a H 0 Ifl c 0 1 fiji U 0 ow jO I n Ui J LflQ j 0 I 0 _ 0 0 0 0 0 0 Lo 3VJl1 DNLLVHdD dO NDèid NI 3V H 1 WèLLAO 29 ...

Page 42: ...CL D 3 CL 0 U w CL H J GE K 45375 0 0 0 0 0 0 C J 0 I_1_ 9Nil riHO jr INDc1 Nt Vi1I 1AViLJ31 O Figure 12 0257A8596 2 Overtravel Curves for Relay Type 1FC77 30 ...

Page 43: ... Transient Overreach of the High Seismic Instantaneous ill S I9II0 RATED INSTRATNILOUS UNIT OPERATING TIEIE 0 2 0 8 A 8 U 9 II Characteristics Unit 020848699 Figure 14 0208A8695 1 Time Current Characteristics of the High Seismic Instantaneous Unit UNCLE IN LEQEES LAG 0 2 3 7 8 9 0 TE ICKUP 31 ...

Page 44: ... AT hATED fRECL TO STOP TIMER TO INDICATING F LIC HT VHEN CHECK1NC PICKED hELM H JERMINALSI kELA SIDE CASE SIDE IXCAKAI 0 L Test Connections for Testing Pickup and Operating Times of the IFC Re ay Time Overcurrent Unit RELAY TERMINALS I2XCAIIAI I2XCAIIAI OR 12XCAI 1A2 Figure 15 for Testing TC iT TiMEk A VA F IA R L E R SCTR Figure 16 0269A1789 O CT 32 ...

Page 45: ...n Unit Used with the IFC Relay VARIABLE RI ISTOR j TO STOP TIMER TO INDICATIN IIUHT WHEN CHECKINU PICKUP RELAY FiELAY sIDE SIDE CASE CASE I SIDE sIDE 2XCAIIAI C 0 Th U CT JUMPER Figure 17 02691 1788 1 Test Connections for Testing Pickup and Operating Times of the IFC Relay High Seismic Instantaneous Unit VIALE RE 51ST OR VOLTS 2 RELAY SIDE CASE SIDE 0 12X AIIAI 0 33 ...

Page 46: ...GIEK 45375 CONTACT ANGERS Figure 19 8042715 Cross Section of IFC Drawout Case Showing Shorting Bar CONNECTION PLUG ORAWOUT ELEMENT SUPPORT STRUCTURE VVIND0J 2 L RELAY CASt BAR CASE BLOCK 34 ...

Page 47: ...GEK 45375 Figure 20 0108B8973 0 50 Hertz Time Current Characteristics for Relay Types IFC51A and 1FC5113 4 I 7 4 5 4 4 N 74 II 5 4 34 I I MUL1HPLES DF PICK UP SETTING 35 ...

Page 48: ...GEK 45375 Figure 21 0108B8974 0 50 Hertz Time Current Characteristics for Relay Types IFC53A and 1FC538 be I0I H 40I be I N I H CO 70 IC 4 C 11 7 I MULTIPLES OF PICK UP SETTING 36 ...

Page 49: ... 45375 Figure 22 0108B8975 O 50 Hertz Time Current Characteristics for Relay Types IFC77A and IFC77B ô 44 II 4 741814 3 3 Ill I 4 4 444 711 I II II I 54 44 14 II I 1 7 I 1 4 MULTIPLES OF PICK UP SETTING 37 ...

Page 50: ...SCREWS MOUNTING SURFACE SIDE VIEW MAX SEMI FLUSH WASHER LOCKWASHER 1 32 SCREW N UT TIE SUPPORT OR TIE ANCHOR 10 32 SCREW THREADCUTTING CABLES VIEW A VIEW D HDW 0257A8549 C i Figure 23 0257A8452 Sheet 1 6 Outline Panel Drilling for Semi Flush Mounting of Relay Types IFC51 1FC53 and 1FC77 38 ...

Page 51: ...or Surface Mounting of Relay Types IFC51 1FC53 and 1FC77 REAR VIEW I 192MM SEE VIEW B EXTERNAL CONNECTIONS 10 32 SCREWS MOUNTING SURFACE SIDE VIEW SURFACE MOUNTING FOR 188 5MM THK MAX PANEL PANEL DRILLING REMOVE KNOCKOUT SEE VIEW C 8 36 SCREW NUT HDW 0257A8549 G2 MOUNTING SURFACE SIDE VIEW 2 4MM 625 ffM 625 TYP 16MM FOR 312 HLS 8MM SURFACE MOUNTING FOR 188 5MM THK AND OVER Figure 24 0257A8452 Shee...

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Page 53: ...el Curves 30 13 High 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 ...

Page 54: ...GE Power Management 215 Anderson Avenue Markham Ontario Canada L6E 1B3 Tel 905 294 6222 Fax 905 201 2098 www ge comlindsyslpm ...

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