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INSTRUCTIONS

TIME OVERCURRENT RELAYS

TYPES

IACS3A FORM

800

AND UP

IAC53B FORM

800

AND UP

IAC54A FORM

800

AND UP

IAC54B FORM

800

AND UP

GENERAL ELECTRIC

GEK-34054H

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Summary of Contents for IAC53B

Page 1: ...TIONS TIME OVERCURRENT RELAYS TYPES IACS3A FORM 800 AND UP IAC53B 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 2: ...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 3: ... ng d i mens ions of wh i ch are shown i n Fi gures 12 and 13 Both the ti me delay a nd the i ns tantaneous u n i t a r e adjus table ove r a range of about 8 to 1 The ava i lable ranges i n ampe r es of both un i ts as well as i nformation on the i r conti nuous rati ng contact rati ng and the tap rati ngs of the i r ta rget s eal i n un i ts are g i ven in the section on RATINGS Information on t...

Page 4: ...onds is gene r ally allowed dependi ng on the clea r ing ti me of the breaker i nvolved These c oord i nation ti mes i nclude in add i ti on to breake r clearing ti me 0 1 0 second for relay ove r tr avel and 0 17 sec ond f or safety fac tor For example i f the br eaker clea r i ng time i s 0 1 3 second 8 cycles the c oor d i nati on ti me would be 0 40 second If the relay ti me i s set by te st a...

Page 5: ...osed unti l i t i s released The same button that releases the target of the seal in un it also releases the target of the i nstantaneous uni t RATINGS TIME OVERCURRENT UNIT Rati ngs of the ti me overcurrent uni t are g i ven i n 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 ...

Page 6: ...4 0 4 5 5 5 5 5 1 5 12 0 AMP RANGE TAP 1 5 2 0 2 5 3 0 RATING 10 0 11 5 13 0 14 5 2 0 16 0 AMP RANGE TAP 2 0 2 5 3 0 4 0 RATING 10 0 12 0 13 0 15 0 INSTANTANEOUS UNIT TABLE I V 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 5 0 6 0 7 0 8 0 16 0 18 0 20 0 20 0 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 i ns tantane...

Page 7: ... 40 0 s 80 0 p 20 0 160 0 20 0 80 0 40 0 160 0 s p CONTINUOUS RATING 0 75 1 5 3 0 6 0 15 0 25 0 25 0 25 0 t ONE K SECOND 25 0 625 50 0 2 500 130 0 16 900 260 0 67 600 400 0 160 000 600 0t 360 000 600 0t 360 000 600 0t 360 000 t Hi ghe r cur r e nts I may be applied for shor te r lengths of ti me T i n accordance wi th the formula l A T tt S Ser i e s c onnected P Pa rallel connected TARGET AND SEA...

Page 8: ...MS Z IMPEDANCE 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 gi...

Page 9: ...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 t wo w nd1ngs connected 1n ser1es HI...

Page 10: ...al ca r t ons in a place t ha t i s f r ee f r om mois t u r e dus t and metalli c chips For e i gn mat te r collecte d on t he outs i de of t he case may f i nd i ts way i n s i de when t he c ove r i s r emoved a nd cause t r ouble in the ope rati on of t he relay ACCEPTANCE TESTS Immediately upon r ece i pt of t he r e lay a n INSPECTION AND ACCEPTANCE TEST should be made to make sure t hat no ...

Page 11: ...e the main brushes do This will prevent CT Current Transformer secondary circuits from being opened ELECTRICAL TESTS DRAWOUT RELAYS GENERAL Since all drawout r elays in service opera te in their cas es it is recommended that they be tested in their cas es or an equivalent s teel case In this way any magnetic effects of the enclosure will be accurately duplicated during testing A r elay may be test...

Page 12: ...t i on plug t o shor t t h e cu r r en t t r a n sfor mer seconda r y ci r cu i t Next scr ew the tap scr ews i n t o the t a p mar ked for the desi r ed cu r r ent and then r eplace the connect i on plu g The picku p of the uni t for any cu r r ent tap set t i n g i s a djust ed by means of a spring adjusting ring See Figure 2 The ring may be t ur ned by i nser t i ng a scr ew dr i ver in the not...

Page 13: ...gram Figures 5 or 7 and connected as indicated in Test Ci rcui t Figure 14 Whenever pos s i ble use the hi gher range s i nce the higher range has a higher continuous rating Setti ng the Ins tantaneous Un it Loosen the locknut and tu r n the pole pi ece towa rd the des i r ed setti ng See Fig ure 2 Tur ning the pole piece up increases the pi ckup tu r n i ng the pole pi ece down decreases the pi c...

Page 14: ...r s t s cr ew was r emoved See Figure 2 Thi s pr ocedu r e i s neces sa r y t o pr event the right hand s t a t i ona r y cont act f r om get t i ng ou t of adjus t men t Scr ews shou ld never be lef t in both t a ps a t t h e same t ime Pickup and Dr opout Tes t 1 Connect r elay s tuds 1 and 2 See Figure 14 t o a DC s ou rce a mmeter and load box so that the cu r r en t can be con t r olled over ...

Page 15: ...nge s ince it has a highe r con t i nuous rat ing 2 Set t he ins tantaneous unit to pi ck up at t he des i red cu r r en t level See SETTING THE INSTANTANEOUS UNIT in t he ACCEPTANCE TEST sect i on All t he tests de s cr ibed above unde r Installa t i on Tes t s mu s t be pe r for med a t t he t ime of installat ion In addi t ion i f those tes t s des cr i bed unde r t he ACCEPTANCE TESTS sect i o...

Page 16: ...scr a t ched a r e l eft ye t i s will clean off any corr os i on thoroughly and r api dl y It s flex i bi li ty ensures the cleaning of the act ua l poi nts of contact Do n ot use knives fi les abra sive pa pe r or cloth of any kind to clean r elay contact s SYSTEM TEST Although this Ins t r uct ion Book i s pr imari l y wri t ten t o check a n d s et the IAC relay overall funct i onal tes t s t ...

Page 17: ...for m havi ng a volta ge of 120 vol t s or mor e wi th pur e r es is tance load boxes f or s et t i n g the cur r en t See Tes t Cir cui t Figur e 14 With t he tap plug i n t he 2 amp tap and the t i me dial wher e the contact s a r e jus t open adjus t t he con t r ol spr i ng t o jus t close t he contact s wi thin t he li mi t s gi ven in Table XIII which a r e 2 0 of t a p amps TABLE XIII TAP R...

Page 18: ...hown 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 be...

Page 19: ...acement of any that are worn broken or damaged When ordering renewal parts addres s 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 20: ...5 and IAC54 Relays 26 9 60 Hz Time Current Characteristics for the Type IAC53 and IAC54 Relays 27 10 Time Curve Characteristics of the Instantaneous Unit 28 1 1 Saturation Curves for Lowest Taps of the Induction Unit of Type IAC Relays with Very Inverse Time Characteristics 28 12 1 3 14 Outline and Panel Drilling for IAC54B Relays Outline and Panel Drilling for IAC53A IAC53B and IAC54 Relays Test ...

Page 21: ... NOTE AFTER 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 22: ... SPRING ADJUSTING RING GEK 34054 TOP INSTANTANEOUS UNIT ADJUSTABLE CORE MAIN STATtONARY BRUSH AND CONTACT ASSfMBlY 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 23: ...F GEK 34054 COlt MAGNET AND TA P BLOCK ASSEMBLY TIME OVER CURRENT UNIT INStANTANEOus UNIT RANGE SELECTOR lEADS Figure 3 8041255 Type IAC53 Relay Removed from Case CRear Vie 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 24: ...u INST r l 4 3 5 2 f SHORT FINGER TSI TARGET SEAL IN INST INSTANTANEOUS UNIT B 6 SEE NOTE I c tNST UNIT 0 NOTE INST UNIT CONNS SHOWN ARE FO R LOW RANGE OPERATION FOR HIGH RANGE OPERATIOf CONNECT B o TO TERMINAL 6 TO TERMINAL 4 Figure 5 0227 A7 196 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 25: ...I UNIT I i I T SI I 2 t SHORT FINGER HSI TARGET SEAL IN INSTANTANEOUS UNIT7 t I10 NOTE INSTAN UNIT CONNECTIONS 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 0 2 46 A2 2 85 l Type I AC54B I nte r na l 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 26: ... 10 60 10 I I I 4 1 01 04 02 Dt _ 1 110 20 10 l 11 5 31 a i 1111 MULTIPLES OF RELAY TAP SETTING Figure 8 Ol08B8939 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 27: ...2 o 2 3 o 0 Ls z o z s J o 4 o s o 6 o 7 oJa o to 12 2 a 2 5 J o q o s o G o 7 o a o to o t2 16 r 1 r t l 1 I I __ __ I 10 9 8 r 7 r 6 ICI 5 c 4 Ill r C 3 r 0 2 0 CD 1 E I f I 1 L 2 10 41 ltiiiO I I Ill II I I I I I Ill MULTIPLES OF RELAY TAP SETTING I I I I IIIII L I ADJUSTI EHTS INST UNIT CONTl HUOUSLY AUJUSTABLE I I I I IIIII I l 1111 I I 10 I I I t I 4 I I I I Ill n 11 Figure 9 0 8 8 8 B0 27 0...

Page 28: ...2 10 b 6 4 2 j 0 0 Ins tantaneous Unit L v h 1 l _ L 60 50 v 25 TAP RANGE 0 5 2 0 AMPS bO lTAP RANGE Q 1 5 6 0 AMPS 25 TAP 60 v lRANGE 50 v 4 16 25 AMPS 2 4 6 8 10 12 14 16 16 20 MULTiPLES JF I IMUM PICK UP CURRENT SATU ATION CGRVES FO LOIEST TAPS OF INO CTION U ITS ON VERY INVERSE TYPE IAC RELAYS 640 0 1 02 l Sat u r a t ion Cu r ves for Unit of Type IAC Re la ys wit h Charact e r i s ti cs Lowe ...

Page 29: ... _ _ 4 4 06 1 1 2MM j_ 8 8 1 223M 2 M 8 375 2 1 2MM S T UD 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 t 1 DR I LLED HOLES 2 l 8 _J 5MM r 1 I T Y P I CAL D I M I NCHES M M Figure 1 2 3 4 DR I LL 1 0 HOLES 1 9MM PANEL DR I LL NG FOR SURFACE MOUN T I NG FRONT V I E W 3 0 I 76MM 5 1 6 1 8 STUD V I E W SHOW I NG ASSEMBL Y OF HARDWARE F OR SURF ACE M T G ON S T E E L PANE L S 6 2 0 9...

Page 30: ...MOUNTNG FRONT VEW u VIEW SHONNG A6S M8 Y Of HAROWAFi FOR SURfACE WTG ON STE EL PANELS 10 32 SCREW ___ OR STUD AU IEL DRILLING FOR SURF4CE al NTWG FRONT I W Figure 1 3 620927 0 2 Out line and Panel Dri ll i ng for I AC53A I AC53B and I AC54A Relays 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 31: ... UN 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 TO T I MER START TO ACCURATELY REPRODUCE RELAY CHARACTER I ST I CS ALL TESTS SHOULD BE MADE W I TH RELAY I N CASE M I N RECOMMENDED VOLTS 120 AT RATED FREQUENCY Figure 14 61 543 9 9 7 Test Connections for Testing Pickup and Time Cur ve of IAC Relays 31 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 32: ... i 52 o 5 2 Tf 5 5 x l 5 1 3 5 51N J F i gure 1 5 6 3 7 5 6 6 7 2 Ext e r nal Connections o f Th ree Type IAC 5 3A Relays used for Phase to Phase and Ground Overcu r r en t P rotect ion of a 3 Phase C i r cu i t 3 2 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: ...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: ...GEPowerManagement 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 ...

Page 35: ...under RANGE AMPERES 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 m 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: ...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 ...

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