Transcription of MAINTENANCE, TROUBLE SHOOTING TESTING OF …
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MAINTENANCE, TROUBLE SHOOTING TESTING OF …
ACBMAINTENANCE, TROUBLE SHOOTINGTESTING OF RELEASESSAFE & SUREL&T SWITCHGEAR15 SAFE & SUREL&T SWITCHGEARESPSERVICEMANUALBREAKER IS NOT CLOSINGBREAKER IS NOT TRIPPING WITH UNDERVOLTAGE OR SHUNT CIRCUIT BREAKERSCOMPLAINTCOMPLAINTPROBABLE CAUSEa) Undervoltage release not connected with ) Undervoltage release, Shunt release, Magneto thermal release connecting link not adjusted ) Magneto thermal release removed from ACB, but trip bar of release kept ) Latch of the mechanism spring not in proper position or ) Under voltage release coil burnt out or open circuited.)fBimetal element of magneto thermal release bent ) After overload or short circuit fault, breaker not reset (ONLY FOR MANUALLY RESET TYPE ACB.)h) Sticking of tripping mechanism due to excess SOLUTIONa) Give rated voltage to under voltage ) Adjust the connecting linkageof releases ) Lock the trip bar at ) Fix the spring ) Replace the under voltagerelease.
safe & sure 15 l&t switchgear esp service manual breaker is not closing breaker is not tripping with undervoltage or shunt release. air circuit breakers
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