GE IAC Series, Instruction Booklet

Page 1: ...rnal Connec tions Diagram on Figure 1 of this supplement Tht r 1 Jstruct1ons do not purport to cover all de tai ls or varidtions ir equipment nor to provide for t er J poss1bJe contingency to be met in connection with installation operCttion or maintenc lnCt Should further information be desired or should particular problems arise which are not covered sutficientlt tor he prnchaser s purposes the ...

Page 2: ...GE OPER CONNECT B o TO TERM f A c TO TERM 11 4 INST 9 10 SHORT FINGERS FIG 1 IJ25 83Ei1t 2 INER AL CONIJECTIVI 15 DIAGRN1 FOR THE IAC53T 11300 SERIES RELAY FRONT VIEvl GENERAL ELECTRIC CO POWER SYSTEMS MANAGEMENT BUSINESS DEPT MALVERN PA 19355 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 3: ...TIONS TIME OVERCURRENT RELAYS TYPES IAC53A FORM 800 AND UP IAC538 FORM 800 AND UP IAC54A FORM 800 AND UP IAC54B FORM 800 AND UP GENERAL ELECTRIC GEK 34054H 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 4: ...nstantaneous Unit Pickup Test TARGET AND SEAL IN UNIT Pickup and Dropout Test INSTALLATION TIME OVERCURRENT UNIT TARGET AND SEAL IN UNIT INSTANTANEOUS UNIT PERIODIC CHECKS AND ROUTINE MAINTENANCE TIME OVERCURRENT UNIT INSTANTANEOUS UNIT TARGET AND SEAL IN UNIT CONTACT CLEANING SYSTEM TEST SERVICING TIME OVERCURRENT UNIT Pickup Tests Time Tests INSTANTANEOUS UNIT TARGET AND SEAL IN UNIT RENEWAL PAR...

Page 5: ... of wh ich are shown in Figures 12 and 13 Both the time delay and the instantaneous unit are adjustable over a range of about 8 to 1 The available ranges in amperes of both units as well as information on their conti nuous rating contact rating and the tap ratings of thei r target seal in units are gi ven in the section on RATINGS Information on the operating time character istics wi l l be found ...

Page 6: ...40 seconds is generally allowed depending on the clearing time of the breaker involved These coordination times include in addition to breaker clearing time 0 10 second for relay overtravel and 0ol7 second for safety factor For example if the breaker clearing time is 0 13 second 8 cycles the coordination time would be 0 40 second If the relay time 1s set by test at the current level in question th...

Page 7: ... is released The same button that releases the target of the seal in unit also releases the target of the instantaneous unit RATINGS TIME OVERCURRENT UNIT Ratings of the time overcurrent unit are given in Table I RELAY IAC53A and IAC54A IAC53B and IAC54B FREQUENCY CYCLES 50 60 50 60 TABLE I PICKUP RANGE AMPERES MAIN TIME INSTANTANEOUS UNIT UNIT 0 5 4 0 1 5 12 0 2 0 15 0 0 5 4 0 1 5 12 0 2 0 15 0 0...

Page 8: ...1 5 12 0 AMP RANGE TAP 1 5 2 0 RATING 10 0 11 5 2 0 16 0 AMP RANGE 0 7 0 8 5 5 5 5 2 5 3 0 13 0 14 5 TABLE IV 1 0 1 2 1 5 2 0 6 0 7 0 7 5 9 0 TABLE V 4 0 5 0 6 0 7 0 17 0 19 0 21 0 23 0 TABLE VI TAP 2 0 2 5 3 0 4 0 5 0 6 0 7 0 8 0 RATING 10 0 12 0 13 0 15 0 16 0 18 0 20 0 20 0 INSTANTANEOUS UNIT 2 5 3 0 4 0 10 0 11 0 13 0 8 0 10 0 12 0 23 5 27 5 30 5 10 0 12 0 16 0 20 0 20 0 20 0 The instantaneous...

Page 9: ...500 2 0 16 0 2 0 8 0 s 3 0 130 0 16 900 4 0 16 0 p 6 0 260 0 67 600 10 0 80 0 10 0 40 0 s 15 0 400 0 160 000 20 0 80 0 p 25 0 600 0t 360 000 20 0 160 0 20 0 80 0 s 25 0 600 0t 360 000 40 0 160 0 p 25 0 600 0t 360 000 t Highe r cur rents I may be applied for shorte r lengths of t ime T in accordance with the formula l A T tt S Se ries connected P Pa rallel connected TARGET AND SEAL IN UNIT Ratings ...

Page 10: ...AT MIN TIMES PICKUP PICKUP I2Z R J z 3 10 20 0 0 5 0 4 60 0 5 0 40 3 90 4 15 4 20 2 90 2 20 104 0 1 5 12 0 60 1 5 0 23 0 53 0 58 0 58 0 36 0 28 14 5 2 0 16 0 60 2 0 0 14 0 30 0 33 0 34 0 22 0 15 8 25 0 5 4 0 50 0 5 1 16 3 25 3 45 3 45 2 41 1 82 86 25 1 5 12 0 50 1 5 0 19 0 44 0 48 0 48 0 298 0 23 12 00 2 0 16 0 50 2 0 0 116 0 25 0 27 0 27 0 180 0 12 6 75 NOTE The impedance values given are those f...

Page 11: ...8 3 57 2 00 1 81 1 70 89 25 2 0 16 0 LOW 2 0 0 64 0 59 0 875 0 49 0 441 0 417 21 875 HIGH 4 0 0 157 0 15 0 22 0 145 0 112 0 105 5 50 10 0 80 0 LOW 10 0 0 035 0 024 0 042 0 024 0 021 0 0197 1 05 HIGH 20 0 0 008 0 006 0 101 0 0054 0 0054 0 046 0 25 20 0 160 0 LOW 20 0 0 0125 0 007 0 014 0 008 0 0074 0 0065 0 35 HIGH 40 0 0 0027 0 0013 0 003 0 0015 0 0015 0 0015 t LOW two w1nd ngs connected n ser es ...

Page 12: ... in a place that is free from moisture dust and meta llic chips Foreign matter collected on the outside of the case may f i nd its way inside when the cover i s removed and cause trouble i n the operation o f the relay ACCEPTANCE TESTS Immed iately upon receipt of the relay an INSPECTION AND ACCEPTANCE TEST should be made to make sure that no damage has been sustained in shipment and that the rela...

Page 13: ...the main brushes do This will prevent CT Current Transformer secondary circuits from being opened ELECTRICAL TESTS DRAWOUT RELAYS GENERAL Since all drawout relays in service operate in their cases it is recommended that they be tested in their cases or an equivalent steel case In this way any magnetic effects of the enclosure will be accurately duplicated during testing A relay may be tested witho...

Page 14: ...the case remove the connection plug to short the current transformer secondary circuit Next screw the tap screws i nto the tap mark ed for the desired current and then replace the connection plug The pickup of the un it for any current tap setting is adjusted by means of a spring adjusti ng ring See Figure 2 The r i ng may be turned by i nserting a screw driver in the notches around the edge By tu...

Page 15: ...ns Diagram Figur es 5 o r 7 and connected as indicated in Test Circuit Figure 14 Whenever possible use the higher range since the higher range has a higher continuous rating Setting the Instantaneous Unit Loosen the locknut and turn the pole piece toward the desired setting See Figure 2 Turning the pole piece up increases the pickup turning the pole piece down decreases the pickup Bring up the cur...

Page 16: ...the first screw was removed See Figure 2 This procedure i s necessary to prevent the right hand stationary contact from gett i ng out of adjustment Screws should never be left in both taps at the same time P i ckup and Dropout Test 1 Connect relay studs 1 and 2 See Figure 14 to a DC source ammeter and load box so that the current can be controlled over a range of 0 1 to 2 0 amperes 2 Turn the time...

Page 17: ...ect the higher range since it has a higher conti nuous rating 2 Set the instantaneous unit to pick up at the desired cur rent level See SETTING THE INSTANTANEOUS UNIT in the ACCEPTANCE TEST section All the tests described above under Installation Tests must be per formed at the time of installation In addition if those tests described under the ACCEPTANCE TESTS section were not performed prio r to...

Page 18: ...ate that no scratched are left yet is w i ll clean o f f any corrosion thoroughly and rapidly Its f lexibility ensures the clean i ng o f the actual po i nts o f contact Do not use kn ives f iles abrasive paper or cloth of any k i nd to clean relay contacts SYSTEM TEST Although this Instruction Book is primarily written to check and set the IAC relay overall functional tests to check the system op...

Page 19: ... voltage of 120 volts or more with pure resistance load boxes fo r setting the current See Test Circuit Figure 14 With the tap plug in the 2 amp tap and the time dial where the contacts are just open adjust the control spring to just close the contacts within the limits given in Table XIII which are 2 0 of tap amps TABLE XIII TAP RANGE TAP MINIMUM AMPS MAXIMUM AMPS 0 5 4 0 2 AMP 1 96 2 04 2 0 16 0...

Page 20: ... shown on Table XV TABLE XV 60HZ TAP AMPS MIN SEC MAX SEC MIN SEC 2 0 4 0 6 70 7 71 6 94 2 0 20 0 0 67 0 77 0 65 INSTANTANEOUS UNIT 1 Both contacts should close at the same time 50HZ MAX SEC 7 98 0 75 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 ...

Page 21: ...acement of any that are worn broken or damaged When ordering renewa l parts address the nearest Sales Office of the General Electric Company specify the quantity required and the name of the part wanted and the complete model number of the relay for which the part is required 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 22: ...nd IAC54 Relays 26 9 60 Hz Time Current Characteristics for the Type IAC53 and IAC54 Relays 27 10 Time Curve Characteristics of the Instantaneous Un it 28 1 1 Saturation Curves for Lowest Taps of the Induction Unit of Type IAC Relays with Very Inverse Time Characteristics 28 12 Outline and Panel Dr illi ng for IAC54B Relays 13 Outl i ne and Panel Drilling for IAC53A IAC53B and IAC54 Relays 14 Test...

Page 23: ...TER ENGAGING AUXILIARY BRUSH CONNECTING PLUG TRAVELS 1 4 INCH BEFORE ENGAGING THE MAIN BRUSH ON THE TERMINAL BLOCK Figure 1 8025039 Cutaway of Drawout Case Showing Position of Auxiliary Brush and Shorting Bar 21 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: ...TOP INSTANTANEOUS UNIT ADJUSTABLE CORE MAIN StATIONARY RUSH AND CONTACT A5SEMBLY otSK MA NET Figure 2 8041253 Type IAC53 Relay Removed from Case Front View 22 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: ... GEK 34054 COil MAGNET AND TAP BLOCI ASSEMBlY TIME OVER CURRENT UNIT INSTANTANEous UNIT RANGE SELECTOR lEADS Figure 3 8041255 Type IAC53 Relay Removed from Case Rear Vie N 23 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: ... LJ INST r t 4 3 5 2 f SHORT FINGER TSI TARGET SEAL IN INST INSTANTANEOUS UNIT B 6 SEE NOTE c t NST UNIT 0 NOTE INST UNIT CONNS SHOWN ARE FOR LOW RANGE OPERATION FOR HIGH RANGE OPERAllOI CONNECT B o TO TERMINAL 6 c TO T ERMINAL 4 Figure 5 0227A719 6 l Type IAC53B Internal Connections Front View 24 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: ...NT UNIT i i I T Sl I INSTANTANEOUS UNIT7 2 6 10 f SHORT FINGER HSI TARGET SEAL IN NOTE JNSTAN UNIT CON NECTIONS SHOWN ARE FOR LOW RANGE OPERATION FOR HIGH RANGE OPERATION CONNECT 8 t o TO TERMINAL 6 t A c TO TERMINAL 4 Figure 7 0246A2285 l Type IAC54B Internal Connections lndlcates revision 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 28: ...GEK 34054 I MULTIPLES OF RELAY TAP Figure 8 Ol08B89 39 2 50 Hz Time Current Characteristics for the Type IAC53 and IAC54 Relays 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 29: ... o f 2 f 5_ 2 o 2 5_ J oJ o 1 sJz oJ2 5 J o o 5 o 6 o J oJa o to 12 z oJ2 5 J o q o s o G o o a o to o t2 1 t6 1 r 1 1 1 r r r _ r 10 9 8 r 7 _ 6 00 c 5 4 t f r 3 c 2 0 CD r 1 r E 1 t I 1 L 2 111110 I I I II II 10 I I I I I Ill MULTIPLES OF RELAY TAP SETTING l I I I 111111 I I I I I ADJUS1MHTS IHST UNIT COHTI HUOUSLY AOJUSTA8LE I I I I IIIII l I I I H I 10 I I I t I I il II F i gure 9 088880270 3 ...

Page 30: ... 4 2 j I 0 0 I nstantaneous Unit v f vv f r f L v v v bO v 50 v 2 5 v TAP RANGE 0 5 2 0 AMPS 60 lTAP RANGE 50 1 5 0 AMPS 2 5 TAP 60 J RANGE 50 4 16 2 5 AMPS 2 4 6 10 12 14 16 18 L O MU L T i P L E S J F MUM P I C K U P CURRE N T S A T U A T O N C RV E S F O l O W E S T T A P S O F I O C T I O U T S O N V E RY I NV E R S E T Y PE I A C R E L AYS 6400102 1 Saturation Curves for Unit o f Type I AC Re...

Page 31: ...M STUD NUMBER I NG 9 7 5 3 1 0 0 0 0 0 0 0 0 0 0 1 0 8 6 4 2 BACK V I DR I LLED HOLES j_ 4 28 1 PANEL DR I L L I N G 314 DR I L L 1 0 HOLES 1 9MM PANEL DR I LL NG FOR SEM I FLUSH MOUNT I NG F RONT V I E FOR SURFACE MOUNT I NG FRONT V I E W T Y P I CAL D I M I NCHES M M Figure 1 2 3 0 I 76MM 5 1 6 1 8 STUD V I E SHO I NG ASSEMBLY OF HARD ARE FOR SURFACE MTG ON S T EEL PANELS 6 2 0 9 27 1 8 Ou t l i...

Page 32: ...EK 34054 u VIEW SHO VNG A6S Mf LY Of HAROWAFi FOR SURfACE MTG ON STEEL PANELS 10 32 SCREW OR ST UD AUEL DRILLING FOR SORF Ct llltOlNTIHG FRONT V W Figure 1 3 6209270 2 Outl i ne and Panel Dri l l i ng f or IAC5 3A IAC 5 3 B and IAC54A Re lays 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 33: ...N I T __ I 6 0 3 4 5 0 0 0 8 9 10 X LA13 TEST PLUG VAR I ABLE RES I STOR l l TO T I MER START M I N RECOMMENDED VOLTS 120 AT RATED FREQUENCY TO ACCURATELY REPRODUCE RELAY CHARACTER I ST I CS ALL TESTS SHOULD BE MADE W I TH RELAY I N CASE Figure 14 6154 399 7 Test Connections for Testing Pickup and Time Cur ve of IAC Relays 3 1 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 34: ...2I_ill T t i 52 0 52 Tf 5 5 x 1 51 3 ll 5 5 1 N l 6 F igure 15 6375667 2 External Connections of Three Type I AC53A Relays used for Phase to Phase and Ground Overcurr ent Protecti on of a 3 Phase Circuit 32 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 35: ...der RANGE A MPERES the range value which reads 2 0 1 5 0 should read 2 0 1 6 0 Also under TAPS AVAILABLE AMPERES at the end of the string oftap values where it reads 1 5 0 it should read 1 6 0 PAGE 6 On TABLE rn under TIME OVERCURRENT UNIT the last range value which reads 2 0 1 5 0 should read 2 0 1 6 0 PAGE S On TABLE IX under RANGE the range which reads 0 5 0 4 should read 0 5 4 0 Also under BUR...

Page 36: ...GE Power Management 21 5 Anderson Avenue Markham Ontario Canada L6E 1 83 Tel 905 294 6222 Fax 905 201 2098 www ge com indsys pm 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 ...