INSTRUCTIONS
TIME-OVERCURRENT RELAYS
TY:PE IAC66K
GENERAL
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ELECTRIC
GEI-44233 F
Supersedes GEI-44233 E
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Страница 1: ...INSTRUCTIONS TIME OVERCURRENT RELAYS TY PE IAC66K GENERAL fj ELECTRIC GEI 44233 F Supersedes GEI 44233 E 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 ...
Страница 2: ...ON 7 LOCATION 7 MOUNTING 7 CONNECTIONS 7 INSPECTION 8 PERIODIC CHECKS AND ROUTINE MAINTENANCE 8 TIME OVERCURRENT UNIT 8 INSTANTANEOUS UNIT 8 HIGH DROPOUT INSTANTANEOUS UNIT 8 TARGET AND SEAL IN UNIT 8 CONTACT CLEANING 8 SYSTEM TEST 8 SERVICING AND ADJUSTMENTS 8 TIME OVERCURRENT UNIT 8 PICKUP TESTS 9 TIME SETTING 9 STANDARD INSTANTANEOUS UNIT 9 HIGH DROPOUT INSTANTANEOUS UNIT 9 TARGET AND SEAL IN U...
Страница 3: ...A 50 IOC B UNIT UNIT 0 8 1 7 l 2 10 40 2 6 1 4 2 6 1 5 3 10 40 4 12 l B 4 3 2 5 5 20 80 4 12 1 8 4 3 2 6 20 80 4 12 2 9 5 0 4 8 20 80 4 12 When adjusted as shown above the relay operates as follows 1 For overloads the 51 unit times out picking up external auxiliary 51X which rings the alarm bell 2 For locked rotor the 50 IOC B unit will pick up instantaneously and the 51 unit will pick up with tim...
Страница 4: ...coils of the protective relay The standard instantaneous unit ranges available are 4 16 10 40 20 80 and 40 160 amperes The high dropout instantaneous unit ranges available are 2 6 4 12 10 30 and 20 60 amperes CHARACTERISTICS The time current characteristics for the Type IAC66K relay induction unit are shown in Fig 1 Fig 2 shows the time current characteristics of the standard instant eous unit The...
Страница 5: ...hes up and remains exposed until released by pressing a button beneath the l ower l eft corner of the cover The standard instantaneous unit is a small instantaneous hinge type unit mounted on the right front side of the induction unit Its contacts are normall y connected in parallel with the contacts of the main unit Its coil is connected in series with the operating coil of the main unit When the...
Страница 6: ...es are operated by hand and should unlatch when the target release lever is operated 5 Make sure that the fingers and shorting bars agree with the internal connections diagram CAUTION EVERY CIRCUIT IN THE DRAWOUT CASE HAS AN AUXILIARY BRUSH IT IS ESPECIALLY IMPORTANT ON CURRENT CIRCUITS AND OTHER CIRCUITS WITrl SHORTING BARS THAT THE AUXILIARY BRUSH BE BENT HIGH ENOUGH TO ENGAGE THE CONNECTING PLU...
Страница 7: ...meplate Dropout current should be at least 80 percent of the minimum rating on the nameplate TARGET AND SEAL IN UNIT PICKUP AND DROPOUT TEST 1 Connect relay studs l and 2 see internal connections diagram 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 dial to the ZERO TIME DIAL position 3 Increase the current slowly until...
Страница 8: ...e ACCEPTANCE TEST section If the unit is not set at the minimum calibration mark pickup should be within 1 5 percent of the mark for which it is set HIGH DROPOUT INSTANTANEOUS UNIT Check pickup and dropout current to the limits outlined in the ACCEPTANCE TEST section TARGET AND SEAL IN UNIT Check pickup and dropout as outlined in the ACCEPTANCE TEST section CONTACT CLEANING For cleaning relay cont...
Страница 9: ...iece loosen the locknut and turn it up or down and then tighten in position The contacts should be adjusted to make at about the same time and to have approximately 1 32 inch wipe This adjustment can be made by loosening the screws holding the stationary contacts and moving the contacts up or down as required HIGH DROPOUT INSTANTANEOUS UNIT The high dropout instantaneous unit is similar to the sta...
Страница 10: ...ent the right hand stationary contact from getting out of adjust ment Screws should not be in both taps at the same time 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 broken or damaged When ordering renewal parts address the nearest Sales Office of the General Electric Company specify quantity r...
Страница 11: ...I I I 7 I 110 GEI 44233 20 30 40 5GI070101DB 10 9 8 7 1 6 111 5 c r 4 3 2 I 0 E I I IZ 2f 30 50 10 70 10 luj MULTIPLES OF RELAY TAP SETTING I I 111111 1 I 1 101 1 1 0 H 21 10 I I I 1 1 FIG 1 088880273 0 Time current Characteristics of Type IAC66K Relay 11 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 ...
Страница 12: ... 025 r ocs r 4 f 1 5 2 3 _ CJIWTIII TittlE PIOit Jli_ lfTTI r t 1 11 i 1 I I t i j r t 1 t FIG 2 0208A8695 1 Time current Characteristic of Standard Hi Seismic Instantaneous Unit 12 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 ...
Страница 13: ...EOUS INDUCTION STANDARD HI DROPOUT r t 1 n j t l I l fl l 1 3 9 I 2 6 10 SHORT FINGER FIG 3 402A903 l Internal Connections Diagram for Type IAC66K Relay Front View 13 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 ...
Страница 14: ...AUXILIARY RELAY 50 IOC A NORMAL DROPOUT INSTANTANEOUS OVERCURRENT UNIT 52 POWERCTRCU IT BREAKER W IOG 8 HIGH DROPOUT INSTANTANEOUS OVERCURRENT UNIT 52 a AUXILIARY CONTACT CLOSED WHEN CIRCUI T BREAKER IS CLOSED TC TRIP COIL FIG 4 104A8568 3 Typical External Connections for Motor Pr otection Using Type IAC66K Relays 14 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 ...
Страница 15: ...NG PLUG MAIN BRUSH AUXILIARY BRUSH CONNECTING BLOCK TERMINAL BLOCK SHORTING BAR JOTE AFTER ENGAGING AUXILIARY BR USH CONNECTING PLUG TRAVELS 1 4 INCH BEFORE ENGAGING THE MAIN BRUSH ON THE TERMINAL BLOCK FIG 6 8025039 Cross Section of Drawout Case Showing Position of Auxil iary Brush 15 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 ...
Страница 16: ... 223MM ___ __ ____ __ 711 VIEW SHOWiNG 18MM ASSEMEl f OF HARlWARE FOR SURFACE MTG ON STEEL PAN EL5 PANEL ORtL UNG F SEMI FWSH MOUNTIN tFRONT VIEW DRILL 10 HOLES 19MM 6 80 11 58 PANEL ORILllMG FOR SJRFAC CUNTING TFRO T VIEW FIG 7 K 6209271 6 Outline and Panel Drilling for the Type IAC66K Relays GENERAL ELECTRIC CO POWER SYSTEMS MANAGEMENT BUSINESS DEPT MALVERN PA 1935 i w w w E l e c t r i c a l P ...
