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Summary of Contents for IFV51AD

Page 1: ...TYPES IFV51AD IFV71AD IFV71BD INSTRUCTIONS TIME OVERVOLTAGE RELAYS GENERAL f ELECTRIC GEK 49865A Supersedes GEK 49865 w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 2: ...ckup and Dropout Test High Seismic Instantaneous Unit INSTALLATION Installation Tests Time Overvoltage Unit High Seismic Target and Seal in Unit High Seismic Instantaneous Unit PERIOD IC CHECKS AND ROUTINE MAINTENANCE Time Overvoltage Unit High Seismic Target and Seal in Unit High Seismic Instantaneous Unit Contact Cleaning System Test SERVICING Time Overvoltage Unit Pickup Tests Time Tests Mechan...

Page 3: ...ay has two electrically separate sets of normal l y open contacts These contacts will close when the instantaneous unit operates and they may be used to initiate tripping to sound an alarm or to monitor operation of the unit The instantaneous unit has a self contained target that will show after the unit has operated Each relay is mounted in a standard C1 size drawout case the outline and panel dr...

Page 4: ...e Ohms 68 6 0 73 HIGH SE ISMIC INSTANTANEOUS UNIT The instantaneous unit is frequency compensated over the range o f 50 to 150 of system frequency There are two ranges available 120 200 and 180 300 that are continuously adjustable by means o f a potentiometer located in the rear o f the relay CONTACTS The current closing rating o f the contacts is 30 amperes for voltages not exceeding 250 volts Th...

Page 5: ...32 0 36 0 85 144 2 20 0 36 0 79 1 4 2 18 0 36 0 78 185 2 15 0 37 0 80 211 2 13 0 39 0 83 250 2 20 0 43 0 95 55 4 75 0 53 2 52 64 4 60 0 48 2 21 I 70 4 55 0 46 2 09 82 4 40 0 42 1 85 93 4 34 0 39 1 69 110 4 29 0 36 1 54 60 128 4 21 0 34 1 43 140 4 20 0 33 1 39 164 4 03 0 33 1 33 186 3 96 0 33 1 31 210 3 89 0 34 1 33 240 3 91 0 35 1 36 IFV71AD BD 280 3 92 0 37 1 45 55 5 45 0 57 3 11 64 5 31 0 52 2 7...

Page 6: ... 3 12 0 37 1 15 2 38 0 40 0 95 2 38 0 44 1 05 16 61 0 76 12 62 11 59 0 54 6 26 9 46 0 51 4 82 6 68 0 46 3 07 5 11 0 43 2 20 15 00 0 39 5 85 10 75 0 37 3 98 8 86 0 36 3 19 6 19 0 36 2 23 4 70 0 36 1 69 I 3 65 0 37 1 35 2 76 0 39 1 08 2 20 0 43 0 95 23 40 0 80 18 72 16 08 0 56 9 00 13 08 0 47 6 15 I 9 49 0 42 3 99 8 00 0 49 3 92 21 79 0 35 7 63 15 36 0 33 5 07 12 65 0 32 4 05 8 76 0 32 2 80 6 67 0 3...

Page 7: ...ed to close the contacts for a given voltage The higher the time dial setting the longer the operating time The contacts are just closed when the time dial is set to zero 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 HIGH SEISMIC TARGET AND SEAL IN UNIT The target and seal in unit has two tap selections located...

Page 8: ...t deformed nor its convolutions tangled or touching each other 3 The armature and contacts of the seal in unit as well as the armature and contacts of the instantaneous unit should move freely when operated by hand there should be at least 1 64 inch wipe on the seal in and the instantaneous contacts 4 The targets in the seal in unit and in the instantaneous unit must come into view and latch when ...

Page 9: ... screw 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 inch wipe The minimum voltage at which the contacts will just close is determined by the tap setting in the tap block at the top of the support structure See CHARACTERISTICS section The pickup of the time overvoltage...

Page 10: ...ARGET AND SEAL IN UNIT The target and seal in unit has an operating coil tapped at 0 2 and 2 0 amperes The relay is shipped 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 ...

Page 11: ...m dust and well lighted to facilitate inspection and testing The relay should be mounted on a vertical surface The outline and panel drillings are shown in Figures 15 and 16 Figure 15 shows the semi flush mounting and Figure 16 shows various methods of surface mounting The internal connection diagrams for the relays are shovm in Figures 3 4 and 5 Typical external connections are shown in Figures 6...

Page 12: ... the time tests as described in the INSTALLATION section HIGH SEISM IC TARGET AND SEA L IN UNIT 1 Check that the unit picks up at the values shown in Table VII in the ACCEPTANCE TESTS section 2 Check that the unit drops out at 25 or more o f tap value HIGH SE ISMIC INSTANTANEOUS UNIT Perform a pickup test at system frequency as outlined in the ACCEPTANCE TESTS section CONTACT C LEAN ING For cleani...

Page 13: ...y means of its adjusting screw With the contacts just closing at No 0 time dial 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 time overvoltage unit is adjusted by means of a spring adjustment ring see Figure 1 The spring adjustment ring either winds or unwinds the spiral control sprin...

Page 14: ...aring set sere 1 16 inch hex wrench slightly so the upper pivot can move free1 y Do not remove the set screw from the support structure 4 Loosen the jewel bearing set screw as in 3 above 5 Apply a slight downward finger pressure on the upper pivot and turn the jewel bearing screw from the underside of the support structure to position the disk as determined in step 1 above 6 Turn the jewel bearing...

Page 15: ... a 0 015 0 002 feeler gage and the right contact with a 0 010 0 002 feeler gage HIGH SEISMIC INSTANTANEOUS UNIT The instantaneous unit may be checked the same as the target and seal in unit for contact wipe RENEWAL PARTS Sufficient quantities of renewal parts should be kept in stock for the prompt replacement of any that are worn broken or damaged When ordering renewal parts address the nearest Sa...

Page 16: ...IFV51AD 25 Figure 9 0275A2074 1 Time Voltage Characteristics for Relay Types IFV71 26 Figure 10 0273A9588 0 Typical Pickup Versus Frequency Characteristic for the IFV71GD Instantaneous Unit 27 Figure 11 0273A9078 0 Test Connections for Testing Pickup and Operating Times of the IFV Relay Time Overvoltage Unit 28 Figure 12 0273A9079 0 Test Connections for Testing the High Seismic Target and Seal in ...

Page 17: ... STATIONARY 3RUSH AND CONTACT ASSEMBLY GEK 49865 rTOP P VOT TIME OVERVOLTAGE TAP SELECTOR I CONTROL SPRING ADJUSTMENT RING INSTANTANEOUS UNIT MAIN MOVING CONTACT DISK _ _ DRAG MAGNET Figure 1 8043453 Type IFV71BD Relay Removed from Case Front View 19 w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 18: ...E OVERVOLTAGE ITAP SELECTOR I I I I l INSTANTANEOUS VOLTAGE RANGE ADJUSTMENT U MAGNET ASSEMBLY Figure 2 8043454 Type IFV71BD Relay RemGved from Case Rear View 20 w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 19: ...2026 0 Internal Connections for Relay Types IFV51AD Front View Figure 4 INDUCTION l JO ERATING s d_ T_ OIL SEAL IN I UNiT rr 0275A2029 0 Internal I r 6 5 Connections 21 n SI rr 12 SHORT FINGER II for Relay Types IFV71AD Front View w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 20: ...r T T t MONITOR TRIP OR ALARM 59 IFV IB SI TARGET SEAL IN TOV TIME OvERVOLTAGE I I N S TA NTA N E 0 U OVERVOLTAGE 52 CIRCUIT BRE KER Figure 7 0273A9039 0 Typical External Connections for IFV71BD Relay 24 t w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 21: ... 6 4 2 zr 1 I _ u __ ____ Ill 0 z 0 u w Vl z I i _ i I 1 0 i w 0 8 E 1 0 6 f 1 1 l _ ____ 0 4 L 4 1 I I i 952 Figure 8 0275A2075 l Time Voltage Characteristics for Relay Types IFV51AD 25 w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 22: ...GEK 49865 ll 0 120 130 140 150 160 170 00 IS0200 PERCENT OF TAP VALUE 3 Figure 9 0275A2074 0 Time Voltage Characteristics for Relay Types IFV71 26 w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 23: ...40 I 0 30 UJ cr u I v 20 4 0 I05 110 115 120 12 5 TYPICAL PICKUP VOLTS Figure 10 0273A9588 0 Typical Pickup Versus Frequency Characteristic for the IFV71BD Instantaneous Unit 27 w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 24: ...R I t TO INDICATIN G LIGHT WHEN CHEO ING PICK UP EXTERNAL CAPACITOR WHEN NECESSARY 12XCA2BA I RELAY TERMINALS Figure 11 0273A9078 l Test Connections for Testing Pickup and Operating Times of the IFV Relay Time Overvoltage Unit 28 w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 25: ...High Seismic Target and Seal in Unit Used lith the IFV Relay VARIABLE VOLTAGE SOURCE A T RATED FREQUENCY RELAY TERMINALS Figure 13 0273A9193 0 Test Connections for Testing the High Seismic Instantaneous Unit Used with the IFV Relay 29 RELAY TERMINALS w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 26: ...N PLUG CONTACT FINGERS RELAY CASE SHORTING BAR ORAWOUT ELEMENT SUPPORT STRUCTURE CASE CONNECTION BLOCK Figure 14 8C42715 Cross Section o f Drawout Case Connections 30 w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 27: ...HER 3 062 76M 5 562 141 MM 14 2 i 6 124 156MM t0t Yj010101jljl lololololo o o 1 I I CD 13 _L j ERING I l REAR VIEW TIE SUPPORT OR TIE ANCHOR 8 32 SChEW NUT k CABLE V lEW A HD W 0257A8 549 G 1 IOXI 2 TYPE 8 T T H R EADCU TTl N G T I E If II CAB LE3 SC R EW VIEW 0 Figure 15 0257A8452 Sh l 3 Outline and Panel Drilling for Relay Types IFV51AD 71AD and 7180 31 w w w E l e c t r i c a l P a r t M a n u ...

Page 28: ...i _YL a H DW 0 2 5 7A8 549 G 2 f 5 244 3 688 rl l 212NM 94MN 2 HOLES I I I I SEE VIEW C T 4 i 469 q 1 2 3 7 r 12HM r i 6 MM t_r 750 EXTERNAL i L f 1_9 1 CONNECTIONS r r 4 750 000 dOOO it0 32 SCREWS 121 IN CD 1h q 000 1 T r r _ 625 _ Q__J MOU llNG j j SMM SURFACE TYPICAL 4 MM SIDE IEW FOR 312 riOLES MOUNTING SUf FAC E WASHER REMOVE KNJCKCUT ENLARGED VIEW c REC SCRFACE MT G FOR 8MM HOW 02 57A8 549 6...

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