Table of Contents
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INSTRUCTIONS
These instructions are a supplement to Instruction Book
GEK-34054 which is included in this book.
of the two forms the instructions for the Type IAC53T relay.
The Type IAC53T "800 Seri es" relay is similar to the
Type IAC53B "800 Series" relay except that the contacts of
the main induction unit and instantaneous unit are connected
to separate sets of terminals.
tions Diagram on Figure
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TIME OVERCURRENT RELAY
TYPE IAC
MODEL IAC53T FORMS 800 AND
INTRODUCTION
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GENERAL
ELECTRIC
GEK-45406A
Insert Booklet-GEK-34054
UP
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Table of Contents
Related Manuals for GE IAC Series
Summary of Contents for GE IAC Series
- Page 1 INSTRUCTIONS GEK-45406A Insert Booklet-GEK-34054 TIME OVERCURRENT RELAY TYPE IAC MODEL IAC53T FORMS 800 AND INTRODUCTION These instructions are a supplement to Instruction Book GEK-34054 which is included in this book. The combination of the two forms the instructions for the Type IAC53T relay. T IO The Type IAC53T "800 Seri es"...
- Page 2 GEK-45406 NOTE:lNST. UNIT CONNS. SHOWN -- ARE FOR LOW RANGE OPER. FOR HIGH RANGE OPER., CONNECT ''B" &''o'· TO TERM . &'' A. '&"c" TO TERM.'11'4 . .f/=� UNIT INST-- *=SHORT FINGERS CONIJECTIVI'-15 FOR THE IAC53T 11300 SERIES" ( IJ25 ?;\83Ei1t-2) INER�-!AL DIAGRN1 FIG.
- Page 3 GEK-34054H INSTRUCTIONS 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...
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Page 4: Table Of Contents
GEK-34054 CONTENTS TABLE OF DESCRIPTION • • • • • • • • • • • • APPLICATION CONSTRUCTION RATINGS • • • • • • • • • TIME-OVERCURRENT UNIT INSTANTANEOUS UNIT • • • • • • TARGET AND SEAL-IN UNIT CONTACTS •... -
Page 5: Description
GEK-34054 TIME OVER CURRENT RELAYS TYPES AND UP IAC53A FORM IAC53B FORM AND UP AND UP IAC54A FORM AND UP IAC54B FORM DESCRIPTION The Type I AC53 and IAC5 4 relays covered by these i nst r uct i ons a r e extended- r ange, s i ng le-phase t i me... - Page 6 GEK-34054 APPLICATION Time overcurrent relays are used extensivel y f or protection utility industrial distribution systems, frequentl y overload backup protection other locations Their very-inverse time-current characteristic makes these re lays well s uited application locations where fault-current magnitude dependent mainly upon the l ocation o f the fault rel ative to the re l ay and only slightly upon the system generating setup at the time of the fault Use of rel ays having the very-inverse characteristic in this...
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Page 7: Time-Overcurrent Unit
GEK-34054 picks raises a target into view that l atches up and remains exposed unti l released pressing button beneath l ower - l eft corner of the cover. instantaneous unit small-hinge type unit, which mounted front, right s haft time... - Page 8 GEK-34054 The one-second thermal ratings are listed in Table I I I. TABLE III TIME OVERCURRENT UNIT 1-SEC RATING .{AMPS) (AMPS) 140.0 19,600 - 12.0 260.0 67, 600 - 15.0 260.0 67,600 For ratings of less than one second, the rating may be calculated according to the formula I=�...
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Page 9: Target And Seal-In Unit
GEK-34054 instantaneous unit continuous r ating times minimum s etting or 25 ampe r es, whicheve r is smaller. Example: 2. 0-16. 0 ampe r e instantaneous unit, when s et on the low r ange ( 2.0- 8. 0 ampe r es) continuous rating... -
Page 10: Contacts
GEK-34054 tripping current exceeds amperes, auxiliary relay s hould be used, the connections being such that the tripping current does not pass through the contacts of the target and seal-in coils of the protective relay. CONTACTS current-closing rating contacts amperes ratin g voltages exceeding... -
Page 11: Characteristics
GEK-34054 The i nstantaneous un i t burdens are l i sted i n Table X. TABLE X RANGE BURDENS AT MIN. BURDENS IN 60 HZ tCON- MIN. PICKUP OHMS (Z) V.A. AT 5 AMPS RELAYS NEC- TIMES PICKUP CALCULATED FROM ONLY TIONS AMPS... -
Page 12: Receiving, Handling, And Storage
GEK-34054 t i me relay tak es reset time- dial pos i t i on, when th e current reduced zero, approx i mately seconds. F igure ( 50Hz) Figure ( 60Hz) show time /current character is tics relay types IAC53 IAC5 4. -
Page 13: Mechanical Inspection 1
GEK-34054 MECHANICAL INSPECTION There should noticeable friction when disk rotated slowly clockwise. disk should return itself to its rest position. Make sure control spring deformed, convolutions tangled or touching. The armature and contacts of the seal-in unit, as well as the armature and contacts of the... -
Page 14: Time-Overcurrent Unit
GEK-34054 s i g n i f ica n t l y a f f ec t e d applica t i o n n o n -s i nuso i d a l wa v e f orms. There fore, i n order to test AC relays properly i t i s essent i al to test voltage a nd/or current wave form that is s i nuso i dal. -
Page 15: Pickup Test
GEK-34054 moving magnet toward disk s haft decr eases time, while moving it away increases the time. relay 0. 5 time-dial position 2. 0 tap. Figure 14, Using the test connections the main unit s hould cl ose contacts within ±2% value cu r r ent. -
Page 16: Target And Seal-In Unit
GEK-34054 TABLE XI UNIT RANGE MINIMUM CALIBRATION MAXIMUM AMPERES AMPERES AMPERES AMPERES 16.0 14.4 16.0 17.7 80.0 10.0 - 80.0 72.0 89.0 160.0 20.0 160.0 144.0 177.0 TARGET AND SEAL-IN UNIT The target and seal- i n unit has an operat i ng coil tapped at 0. 2 a n d 2. -
Page 17: Installation
GEK-34054 INSTALLATION f ollowing tests a r e pe rfo r med time installation. T IME -OVERCURRENT UNIT Set tap screw on desi red tap. Using the test ci rcuit in Figu r e 1 4, apply appr oximately twice value until contacts... -
Page 18: Time-Overcurrent Unit
GEK-34054 These tests i ntended to make sure that ' t he relays have dev i ated f rom the ir original sett i ng. I f deviations are encountered, the relay must be retested and serv i ced as descr i bed i n th i s manual. TIME-OVERCURRENT UNIT Perf orm P i ckup test as descr ibed i n the... -
Page 19: Time Tests
GEK-34054 inte r mediate between var ious tap settings obtained. unit is adjusted at the facto ry to c lose its contacts f rom any time dial position minimum curr ent within tap-plug setting. The unit resets at 80% of the minimum cl osing value. Rotate the time dial to the No. -
Page 20: Instantaneous Unit
GEK-34054 Adjust drag magnet obtain c losing time near possib l e to 1 .31 seconds, but at l east between 1.24 and 1.38 seconds. The magnet shou l d be approximately in the mid d l e o f its travel. magnet adjusted l oosening... -
Page 21: Renewal Parts
GEK-34054 RENEWAL PARTS It is recommended that sufficient quantities of renewa l parts carried stock enable prompt repl acement that worn, broken, or damaged. When order i ng renewa l parts, address the nearest Sa l es Off ice of the General Electric Company, specify the quantity requ i red,... -
Page 22: List Of Figures
GEK-34054 LIST OF FIGURES FIGURE PAGE Cutaway o f Drawout Case Show i ng Position o f Aux i l i ary Brush Type IAC53 Relay Removed from Case ( Front V i ew ) Type IAC53 Relay Removed from Case ( Rear V i ew ) Type IAC53A Internal Connecti o ns ( Front View ) Type IAC53B Internal Con nect i ons ( Front View ) Type IAC54A Internal Con nections ( Front View ) - Page 23 GEK-34054 CON NECTING PLUG AUXILIARY SHORTING BAR NOTE: AFTER ENGAGING AUXILIARY BRUSH, CONNECTING PLUG INCH BEFORE ENGAGI NG THE MAIN BRUSH ON THE TERMINAL BLOCK (8025039) Cutaway o f Drawout Case Showing Pos i tion Figu r e 1 of Auxil iary Brush and Shorting Bar...
- Page 24 G E K -3 40 5 4 U N IT IN ST A N TA N EO US TO P A D JU ST A BL E C O RE MA IN StA TIO NAR Y !R USH AN D CON TA CT A 5SE M BLY otSK...
- Page 25 G E K - 3 4 0 5 4 D I S C A N D S H A F T M A G N E A N D TA P B L O C A S S E M SH ELF B l Y T I M E O...
- Page 26 GEK-34054 INTERNAL CONNECTIONS 1FRONT v:EWJ"=SHORT F:NGER Figure 4 ( 6209 658-10) Type IAC53A Internal Connections (Front View) INDUCTION UNIT � SEE NOTE t.NST. UNIT NOTE: INST. UNIT CONNS INST. SHOWN ARE FO R LOW RANGE. OPERATION. � HIGH RANGE OPERAllOI\' "B"...
- Page 27 GEK-34054 INDUCTION INDUCTION UNIT SEAL- IN UNIT SHORT FINGER Figure 6 (6209662 [5]) Type IAC54A Internal Connections ( Front View) INSTANTANEOUS UNIT T � - � =SHORT FINGER HSI•TARGET �SEAL-IN LOW RANGE NOTE :-JNSTAN UNIT CON NECTIONS SHOWN ARE FOR RANGE OPERATION CONNECT "8"...
- Page 28 GEK-34054 "' MULTIPLES OF RELAY TAP ( Ol08B89 39 -2) 50 Hz Time/Current Character is tics f or the F i gure 8 Type- I AC53 and IAC54 Relays...
- Page 29 GEK-34054 I 111111 .. I I I . .. I 7 I Ill .1 .l .I .I I 1 ... EXTEl!DED RWC:E (SGO SfRI ES) ADJUS1MHTS RAHNGS IHST . UNIT TII· I E UHIT TAPS I � ST UNIT TIME UNIT COHTI HUOUSLY Q.S-4.0 5, o.
- Page 30 GEK-34054 141 Sf. I MC M11D UISTMrt--..s; IMIT O i 0 8 l 8 6 Q 'l <I'EJUTIIIi TU4( .IJIO t>!l !' I.Ot& CftRAl!N Tl� " i :, · RMGf F'Ofl liMY PIOilJI' SlTIIIIG � .1'11 0 .005 l . 'l Wlf! pt, U , nr 'IC!Wt' ---- F i gu r e...
- Page 31 GEK-34054 ( 2 ) 5 / 1 6 - 1 8 S T U D S 6 2 5 S U R F A C E M T G . 8 . 3 7 5 2 1 2 9 . 1 2 5 <...
- Page 32 GEK-34054 -- . ---+- -+-+- -. � I � !> 0 0 0 32 SCREW - 10- = -- � - (OR S T U D ) .,._.BERING OF STUOS ( FRONT VIEW ) PAf.El ORLLING F OR SEMI - FLUSH MOUNTNG {F RONT VEW ) AUEL DRILLING FOR SORF�C t:: llltOlN T IHG &FRONT V£W...
- Page 33 GEK-34054 TO T I M E R " STOP " TO I N D I CAT I NG L I GHT WH E N CHEC K I NG P I C KU P O F MA I N U N I T L I GHT TO I ND I CAT I NG WHE N...
- Page 35 MULTJ LIN GE Power Management 205 G'eat V a/leyParlcwoy Malvern. P A 1 9355- 13.17 610 251 7f)()Q E rrata Sheet pages and 8 Revisions to GEK- 34054H 5, 6 PAGE S f or On TA BLE of this page under PICKUP RANGE, A MPERES the range value IAC53 A and IAC54 A and IAC 5 3 B and IAC54B which reads 2 .