GE IFCV51AD Instructions Manual Download Page 1 | Manualshive

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Summary of Contents for IFCV51AD

Page 1: ... OVERCURRENT RELAYS WITH VOLTAGE RESTRAINT TYPES IFCV51AD IFCV51BD m I m i i is m s i 1 Hr i 11 i i I HIII i ti jfSf r I I GE Protection and Control 205 Great Valley Parkway Malvern PA 19355 1337 Courtesy of NationalSwitchgear com ...

Page 2: ...E TESTS VISUAL INSPECTION MECHANICAL INSPECTION DRAWOUT RELAY TESTING POWER REQUIREMENTS GENERAL INDUCTION UNIT HIGH SEISMIC INSTANTANEOUS UNIT HIGH SEISMIC TARGET AND SEAL IN UNIT INSTALLATION INSTALLATION TESTS PERIODIC CHECKS AND ROUTINE MAINTENANCE INDUCTION UNIT HIGH SEISMIC INSTANTANEOUS UNIT HIGH SEISMIC TARGET AND SEAL IN UNIT CONTACT CLEANING SYSTEM TEST 8 9 9 9 9 10 10 10 10 11 11 11 12 ...

Page 3: ...o a fault on the system contributing current the generator The IFCV relay is one of several relays designed specifically for this application or applied to provide such back up protection Others are the Type IFCS voltage controlled overcurrent relay or three single phase distance relays plus a timer for balanced fault back up protection and the Type INC or SGC relays for unbalanced fault back up p...

Page 4: ...ll faults for which the generator back up is required to operate better sensitivity can be obtained by using the IFCS rather than the IFCV The current source for Type IFCV relays should be current transformers at the neutral end of the generator windings when such CT s are available With these connections in addition to external fault back up protection the relays will provide generator fault back...

Page 5: ...e operating characteristic of the Type IFCV relay is fairly constant for all low voltage conditions The CONSTRUCTION The IFCV induction disk relays consist of a molded case cover support structure assembly and a connection plug to make up the electrical connection See cover figure and Figures 1 and 2 Figures 1 and 2 show the induction unit mounted to the molded support structure This disk is activ...

Page 6: ...Figure 1 are 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 letters Hi G molded into their target blocks to distinguish them as High Seismic units Seismic Fragility Level exceeds peak axial acceleration rate of lOg s 4g ZPA when tested using a biaxial mu...

Page 7: ... 150 There will always be at least one ampere overlap between the maximum L setting and the minimum H setting Whenever possible be sure to select the higher continuous and short time ratings Higher currents may be applied for shorter lengths of time in accordance with the formula I v K T is in series with the time overcurrent unit Since the instantaneous unit coil coil see Tables I I and I I I to ...

Page 8: ...circuit burdens with 5 amperes flowing in the lowest tap are listed in The burden on any other tap with 5 amperes flowing is approximately Lowest Tap Actual Tap 2 times the burden for the lowest tap Table VI TABLE VI r Impedance Ohms Range Frequency Tap Amp VA PF 2 16 50 2 58 77 5 0 43 66 5 0 43 2 5 2 16 60 3 10 2 5 HIGH SEISMIC INSTANTANEOUS UNIT The High Seismic instantaneous unit burdens are li...

Page 9: ... fault current A typical phase angle characteristic 1s shown 1n Figure 8 Operating Time Accuracy The IFCV relays should operate within 7 or 0 050 second whichever 1s greater Figures 9 and 10 show the time current characteristics for IFCV relays The setting of the time dial determines the length of time required to close the contacts for a given current The higher the time dial setting the longer t...

Page 10: ...ment and that the relay calibrations have not been disturbed readjustment is necessary refer to the section on SERVICING Since operating companies use different procedures for Acceptance and Installation Tests the following section includes all applicable tests that may be performed on these relays These tests may be performed as part of the Installation or ofv the Acceptance Tests at the discreti...

Page 11: ...ency sinusoidal waveforms can be analyzed as a fundamental frequency plus harmonics of the fundamental frequency i t follows that alternating current AC devices relays will be affected by the applied waveform Therefore in order to test AC relays properly i t is essential to use a sine wave of current and or voltage harmonics cannot be expressed as a finite number for any particular relay However a...

Page 12: ...ving the permanent drag magnet along its supporting shelf moving the magnet toward the disk and shaft decreases the time while moving i t away increases the time Pickup Test Set the relay at the 0 5 time dial position and the lowest tap Using the test connections in Figure 14 the main unit should close the contacts within 1 3 of tap value current with 100 restraint voltage applied Time Test Set th...

Page 13: ...d place i t in the desired tap Next remove the screw from the undesired tap and place i t on the left hand stationary contact where the first screw was removed see Figure 1 This procedure is necessary to prevent the right hand stationary contact from getting out of adjustment Screws should never be left in both taps at the same time Pickup and Dropout Test Connect relay studs 1 and 2 see the test ...

Page 14: ...CE TESTS section 1 Check the operating time at some multiple of tap value this value used is left to the discretion of the user and desired time dial setting with zero 0 or 100 restraint voltage High Seismic Instantaneous Unit 2 Select the desired range by setting the link in the proper position See Figure 1 and the internal connections diagram Figure 3 or 4 Whenever possible be sure to select the...

Page 15: ...e desired current level as outlined in TESTS section Setting the High Seismic Instantaneous Unit in the ACCEPTANCE HIGH SEISMIC TARGET AND SEAL IN UNIT Check that the unit picks up at the values shown in Table IX 1 2 Check that the unit drops out at 25 or more of tap value CONTACT CLEANING A flexible burnishing tool should be used for cleaning relay contacts This is a flexible strip of metal with ...

Page 16: ...earing screw from the underside of the support structure to position the disk as determined in Step 1 above 6 Turn the jewel bearing screw 1 8 turn clockwise and tighten the upper pivot set screw to 2 5 3 5 inch pounds of torque 7 Turn the jewel bearing screw 1 8 turn counterclockwise This will lower the disk and shaft assembly approximately 0 005 inch and permit proper end play The shaft must hav...

Page 17: ...ics of Figures 9 and 10 i f 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 Connect the operating coil terminals to a source of the proper frequency and good waveform having a voltage of 110 or more with resistance load boxes for setting the current See Test Circuit Figure 14 Follow the The relay is first set for pickup ...

Page 18: ...mature 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 front half of the shaded pole with the armature held closed close with feeler gage in place 3 4 Check this by inserting a 0 010 inch feeler gage between the Contacts should HIGH SEISMIC TARGET AND SEAT IN UNIT Since mechanical adjustments may af...

Page 19: ...antaneous Unit Transient Overreach Characteristics High Se1sm1c Instantaneous Unit Time Current Characteristics Test Connections CT Testing 27 9 28 10 29 11 30 12 31 13 32 14 Test Connections Induction Unit 33 15 Test Connections High Seismic Instantaneous Unit Test Connections H1gh Se1sm1c Target and Seal 1n Unit 34 16 35 17 Cross Section of Orawout Case Connections 36 18 Outline and Panel Drilli...

Page 20: ...p Selector Seal In Unit Stationary Contact Instantaneous Unit Main Moving Contact Shield Disk Seal In Target Drag Magnet Main Stationary Brush Control Spring Adjustment Ring and Contact Assembly Figure 1 8043510 IFCV51BD Relay Removed from Case Front View 20 Courtesy of NationalSwitchgear com ...

Page 21: ...urrent Tap Selector Adjustable Resistor Voltage Circuit Shield Current U Magnet Assembly Voltage Restraint U Magnet Assembly Figure 2 8043511 IFCV51BD Relay Removed from Case Rear View 21 Courtesy of NationalSwitchgear com ...

Page 22: ...ON UhllT T L SL CURRENT INDUCTION h T SI T 4 SI y y v v V y y y y y v 6 O o o 2 8 6 12 o o o o 7 u D SHORT FINGER Figure 3 0273A9599 2 Internal Connections for Relay Types IFCV51AD Front View 22 Courtesy of NationalSwitchgear com ...

Page 23: ...n L H V V V V V V y v v V 4 8 2 6 12 14 O O O o o o 3 5 7 13 11 INSTANTANEOUS SETTING SET LINK TO H FOR HIGH RANGE AND TO L FOR LOW RANGE LINK SHOWN IN HIGH RANGE POSITION SHORT FINGER Figure 4 0275A3203 2 Internal Connections for Relay Types IFCV51BD Front View 23 Courtesy of NationalSwitchgear com ...

Page 24: ... 86 a CD m m x 41 7 c ro i ro P 4 GENERATOR TC TC VO 3 VO CD 4 cr o DEVICE FUNCTION NUMBERS O 6t 6t 6 51 3 I 51 2 oc oc oc J X 51 OVERCURRENT RELAY TYPE IFCV5IAD 0C OPERATING COIL RC RESTRAINING COIL 51 SEAL IN WITH TARGET 52 POWER CIRCUIT BREAKER a AUXILIARY CONTACT CLOSED WHEN BREAKER CLOSES TC TRIP COIL 86 LOCKOUT RELAY HAND RESET 41 FIELD BREAKER fD o 51 1 o cn H 1B JX 5 5 5 I T O CJ 1 o IF US...

Page 25: ...Y Y 120 L LV 2 RATIO 120 j86 Mi 152 4 1 T a a T 86 86 ALTERNATE CONN SHOWN FOR CURRENT COILS FOR POTENTIAL COILS USE EITHER CURRENT CONNS A OR WITH EITHER POTENTIAL CONN OR AND ARE PREFERRED 52 41 TC TC GEN C DEVICE FUNCTIONNUMBERS 51 RELAY TYPE IFCV5I AD OC OPERATING COIL VC VOLTAGE COIL 51 SEAL IN WITH TARGET 52 POWER CIRCUIT BREAKER a AUX CONTACT CLOSED WHEN BREAKER IS CLOSED TC TRIP COIL 86 LO...

Page 26: ...80 UJ z i 70 a 6 0 50 u_ O 40 i t 21 UJ 30 cr UJ CL 20 10 10 20 30 40 SO 60 70 80 90 100 PERCENT OF RESTRAINT Figure 7 0275A4560 0 Typical Pickup Characteristics of the IFCV Relays 26 Courtesy of NationalSwitchgear com ...

Page 27: ...u Q 2 a o ai 0 0 3 OJ 2 LU o _4 6 U X O CD m i D i z rv 3 C J 03 to CO r ns 4 8 CT C H 3 QJ 3 a UJ O U 30 60 90 120 150 180 210 240 270 300 330 360 0 r a rD UJ 5 Q_ s c o to O PHASE ANGLE IN DEGREES CURRENT LEADING VOLTAGE Hh c zr fD n o TO fD a to ...

Page 28: ... IB 7 7 T 2 S 5 B B 4 t s s 5 4 4 V 1 a ii Vi t N S N X v 2 2 X 10 v X S X 9 IO N X 6 X X X i j 4 J X N V i x V A D x x 1 I c 4 X 5 5 7 7 if X s A s 3 X o A 1 in X 3 X x X O Q A X O v X 2 D J E X a x K e i j 1 K M 1 40 1 2 M 01 7 m l 83 83 82 82 81 4 B 7 B 18 2 3 4 5 7 I m 48 S8 88 788888 4 I B M I I8 2 3 MULTIPLES OF RELAY TAP SETTING Figure 9 0138B7322 0 Sh 1 Time current Characteristics 28 Cour...

Page 29: ...AP SETTING m S 20 10 c 0 7 7 o 9 rvA 4 YYA 2 5 i 3 5s vv VSC 2 N N X N N W x ic 0 X NTs v X I X ii r i X A X J Co C 35 4 Z 3 1 1 x i a a V 7 7 1 Q X X c 3 i x 3 x 4 o o Q 2 Q X 3 J N V V 0 2 E E 2 H i u IK 1 A 00 0 S 07 00 07 I 00 05 04 04 03 02 02 01 3 4 5 0 7 1 f 3 4 9 7 0 0 19 3 4 5 7 0 0 10 2 1 2 3 4 3 7 1 0 J MULTIPLES OF RELAY TAP SETTING Figure 10 0138B7322 0 Sh 2 Time current Characteristi...

Page 30: ...ENT SUDDENLY APPLIED PERCENT OVERREACH 100 CD 50 o cr o h no o oo g h CT iio 5 rc co T co o CC UJ CL cn 5 to m OJ 3 3o 7 3 HI SEISMIC MINIMUM PICK UP OJ o s o co _0 s I 3 t to o CT 20 3 CD n CD 2 5 oo ij CD 2 to O MAXIMUM PICK UP HI SCISMIC c T i IS c l o 10 0 90 60 SO uo 7 fr 80 20 30 ANGLE IN DEGREES LAG ...

Page 31: ...D O f h ro r ZT O ro ro 020 o i U 00 CD CO zr o CO CD co cn Ul I r CO o m CIS t 3 I JJ CO o 21 3 CD h I i i ro CD zs 4 Q _ CO O C C O 3 S r ft 0 3 Z5 rt o P O 010 Q _ rt o o JZ zr CO Qj 5 CZ PJ rs o c r ft V 005 5 CO c O 10 9 6 7 8 5 4 3 1 5 2 MULTIPLES OF PICKUP ...

Page 32: ...14 10 II o 12 I2XCA28AI A RELAY COIL IN CIRCUIT r h RELAY TERMINALS 13 14 I2XCA 28AI RELAY COIL NOT IN CIRCUIT Figure 13 0273A9501 0 Test Connections for Testing CT Secondary Used with the IFCV Relay 32 Courtesy of NationalSwitchgear com ...

Page 33: ...FREQUENCY C T JUMPER T O S T O P T I MER R E L A Y T E R MINALS M M L TO INDICATING LIGHT WHEN CHECKING PICKUP 12 X GA 2 8 AI VARIABLE VOLTAGE A T RATED FREQUENCY V CKPO Figure 14 0275A4455 0 Test Connections for Testing Pickup and Operating Times of the IFCV Relay Induction Unit 33 Courtesy of NationalSwitchgear com ...

Page 34: ... ATED _o O FREQUENCY CT JUMPER TO STOP T I M E R I I 3 RELAY TERMINALS 4 M M TO INDICATING L I G H T WHEN CHECKING PICKUP I 2X C A 2 8 A I Figure 15 0275A4456 0 Test Connections for Testing Pickup and Operating Times of the IFCV Relay High Seismic Instantaneous Unit 34 Courtesy of NationalSwitchgear com ...

Page 35: ...INALS VARIABLE RESISTOR A Z 13 DC VOLTS 14 V I2XCA28AI l CT JUM PER Figure 16 0273A9503 0 Test Connections for Testing the High Seismic Target and Seal in Unit Used with the IFCV Relay 35 Courtesy of NationalSwitchgear com ...

Page 36: ... n co c DRA N0U1 ELEMENT STRUCTURE s a SUPPORT 4 00 o p ro _n o 5 O in m LO CD O c O 3 WINDOW o b rr i co ro cr i n o o s pj RELAY CASE O SHORTING BAR c c o PJ cn ro LT rr o ia LO rr o s c 3 UD CP P s ...

Page 37: ... i J i CUTDUT 6 750 171MM 6 188 1 57MM I i 0 3 094 79MM i 3 375 86MM Li k EXTERNAL CONNECTIONS 10 32 SCREWS 2 844 72MM 5 688 MOUNTING SURFACE SIDE VIEW 144MM PANEL DRILLING TIE SUPPORT SEMI FLUSH MOUNTING OR PANEL VAX 125 THK 3MM TIE ANCHOR WASHER LOCKWASHER 8 32 SCREW r 1 I h 10 32 SCREW THREADCUTTING 11 r11 NUT I CABLES CABLE TIE VIEW A HDW 0257A8549 G 1 Figure 18 0257A8452 3 Sh l 5 Outline and ...

Page 38: ...E MOUNTING FOR 3 16 THK MAX PANEL LOCK WASHER 8 36 SCREW Si 8 344 NUT REMOVE KNOCKOUT 212MM 3 688 2 375 i 61MM c OVERSIZE WASHERS VIEW B 94MM l t HDW 0257A8549 G2 C 469 1 MOUNTING SURFACE LUr WASHER LKWASH SEE VIEW C V 12MM 4 750 17 TWMJ 750 o kL MlM 1 EXTERNAL CONNECTIONS 10 32 SCREWS 19MM o o Q C i 625 3 C 2 219 HLS 5MM 625 TYP NUT MOUNTING SURFACE SIDE VIEW VM 156 HLS 4WW 8MM SPACER REMOVE KNOC...

Page 39: ...Courtesy of NationalSwitchgear com ...

Page 40: ...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 ...

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