GE IAC51A Instructions Manual Download | Manualshive

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Summary of Contents for IAC51A

Page 1: ...INSTRUCTIONS UNDERCURRENT GET 21903 F Supersedes GEI 21903 E Insert Booklet GEI 1753 AND OVERCURRENT RELAYS Types IAC59A 1AC59B and 1AC59 GENERALS ELECT IC ...

Page 2: ...rcurrent and Overcurrent flelays Type IAC Figure 1 IC 6400264 Time Current Characteristics for IAC59C Relays Figure 2 K 6400289 Time Current Characteristics for Type IAC59B Relay IQ IC 0 C Type IAC59A and 2 ...

Page 3: ... DRILL VIEW SHOWIN IhLU IAMbA 00 E 1 DSILL Il to HOLES 9MM PAN DfILLING F0l MOHING 115 VOLTS RTE1i HLQUNCY MF2 IHMER S 2 IAC AOJUST6 RES Figure 5 K 6400302 Type IAC59A and IAC59B Relays Test Connections PANEL DWNG F SDdI FWSH MOUNTING FRONT VIEW Figure 6 6209271 6 Outline and Panel Drilling for the Type IAC59A Relay Indicates revision 5 ...

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Page 5: ...t mini mum pick up current and 60 cycles are given in the following table Mm Cont Relay Tap Pick Cur Volt Imp P F Type Range up rent Amps Ohms IAC59A 0 5 2 0 5 5 1 17 4 71 27 IACS9C 1 5 6 1 5 15 1 17 0 52 25 4 16 4 0 15 1 36 0 08 38 IAC59B 0 5 2 0 5 2 5 4 72 18 90 29 1 5 6 1 5 7 5 4 68 2 08 26 4 16 4 0 15 I492 0 31 27 in place changes the current required to close the right contacts Each of these ...

Page 6: ...e IAC59A and IAC59B Relays Internal Con nections Front View Un rcurrent and Overcurrent Relays Type IAC SEAL I N ELEMENT 9 SHORT FINGER OPERAT I NO COIL LI 4 SHORT FINGR Figure 4 K 6400432 Type IAC59C Relay Internal Connections Front View 4 ...

Page 7: ......

Page 8: ...GENERAL ELECTRIC COMPANY POWER SYSTEMS MANAGEMENT BUSINESS DEPT PHILADELPHIA PA 19142 GENERAL ELECTRIC 7 80 2 8 ...

Page 9: ...00 0 CJ1 UU 1 v m 00 C m m I 3 mI 0 m C C m z I r 11 U I C n I 5 z I ...

Page 10: ...PLUG SEAL IN UNIT HOLDING COIL SEAL IN j SEAL IN UNIT STATIONARY CONTACT LEFT SEAL IN UNIT STATIONARY CONTACT RIGHr SEAL IN MOVING CON TA CT ASSEMBLV A S006996 Front View B 8006997 8ar View FiBur B educLicnj Ln L or Tvp JAC Re 1ay r 1 LOWER JEWEL SCREW _3 2 ...

Page 11: ...estrained by a spiral spring to give the proper contact closing current and its motion is retarded by a permanent magnet acting on the disk to give the correct time delay There is a seal in unit mounted on the front to the left of the shaft This unit has its coil in series and its contacts in parallel with the main contacts such that when the main contacts close the seal in unit picks up and seals...

Page 12: ...GEH 1753 Time Overcurrent Relays Type IAC In z a C In z MULTIPLES OF RELAY TAP SETTING Fig 2 0888R0269 3J Time current Curves of Type 1AC Relays with inverse lime Characteristics 4 ...

Page 13: ...eal in coils of the protective relay BURDENS Burdens for the standard coils are given in the following table These are calculated burdens at five amperes based on burden of minimum tap Volt ampere burdens for the lowest tap on any of the three coils can be determined for any value of current up to 20 times tap setting from Fig 3 Coil Volt Imp P F Freq Tap Amperes Amps Ohms 4 16 60 4 0 8 8 0 35 0 2...

Page 14: ...l A Auxiliary contact closed when breaker closes Fig 5 K631S668 l Ritvrnal CnntcLions of i rc e Type C5 i lu Jays used in Conjunction with Tripping Re cLors f r Eretction of a1 re Pnase Lrcuit Fig 4 K 6375667 2 External Connections of Three Type IAC51A Relays used for Phase to Phase and Ground Overcurrenc Portectjon of a 3 Phase Circuit Fig 6 K 6375669 6 External Connections of Three Tyn IAC5TR Re...

Page 15: ...CHARACTERISTICS The instantaneous element operates over a 4 to I range and has its calibration stamped on a scale mounted beside the adjustable pole piece Time current characteristics are shown in Fig 10 RATINGS The instantaneous unit is designed to use either of two coils having pickup ranges of 10 to 40 and 20 to 80 amperes respectively The current closing rating of the contacts is 30 amperes fo...

Page 16: ...ontacts to the current transformer Normally most of the flux generated by the main REA coil passes through the upper limb of the magnetic structure and holds the armature firmly against this limb When the contacts of the induction unit close the shorting coil of the REA is short circuited and current flows in this coil by transformer action causing a redistribution of flux which actuates the armat...

Page 17: ...elays when not included as a part of a control panel will be shipped in cartons designed to protect them against damage Immediately upon receipt of the relay an examination should be made for any damage sustained during shipment If injury or damage resulting from rough handling is evident a claim should be filed t once with the transportation company and the nearest Sales Office of the General Ele...

Page 18: ...N UNIT SI SL IN UNIT SHORT FINGER Fig 14 K 6209662 5 Internal ConnectionB for the Type IAC52A Relay Front View SEAL IN A C RIP UNIT I NSTANT UI i Fig 13 K 6209294 3 Internal Connections for the Type IAC51R Relay Front View INDUCT I ON L j j rJS 4 6 10 ...

Page 19: ... inclusive One of the mounting studs or screws should be permanently grounded by a conductor not less than No 12 B S gage copper wire or its equivalent INSPLCTION At the time of installation the relay should be Inspected for tarnished contacts loose screws or other imperfections Ti any trouble is found it should be corrected in the manner described under MAINTENANCE CAUTION Every circuit in the dr...

Page 20: ...es the maximum time setting The primary adjustment for the time of opera tion of the unit is made by means of the time dial However further adjustment is obtained by moving the permanent magnet along its supporting shell moving the magnet toward the disk shaft decreases the time while moving It away increases the time If selective action of two or more relays Is required determine the maximum poss...

Page 21: ...ly 1 32 inch from the Inner edge of the stationary contact sup porting post 2 ARMATURE ADJUSTMENT Loosen the two screws which hold the armature assembly bracket to the bottom of the frame Slide the bracket in or out whichever is necessary until the armature just touches the pole face of the upper core In this position the armature should be about 1 32 inch from the pole face of the lower core Next...

Page 22: ...ontacts and thus prevent closing The burnishing tool described above can be obtained from the factory PERIODIC TESTING An operation test and inspection of the relay at least once every six months are recommended Test connections are shown In Fig 18 RENEWAL PARTS It is recommended that sufficient quantities of renewal parts be carried in stock to enable the prompt replacement of any that are worn b...

Page 23: ...WARE FOR SURFACE IiTG ON STEEL PANELS DIV L f iLES S I F PAN1 DRIll INS ICE FG A 1111 JE IL F IT Ill DVII i LI 4 1 h PANEL lRLLING SEMI IUJSH MTC G A A N PANEL ORILIIlC FOR FIU 8 511014 F UTO FRONT RuN C 2 0 Cig 13 237C707 1 Outline and Panel Drilling for the Type IAC51A IACS1B IAC5IR IAC52A and 1AC528 Relays 15 SEMI FLUSH PANEL LOCAFION SURFACE 111G MEG b STUD NUMBERING FRONT VIEW H ST ...

Page 24: ...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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