Possible Actions:

• Check clearance of MCB's & MCCB’s
• Check for any over loading
• Check the MCB's & MCCB’s operation without load (disconnect secondary wire)
• Check Secondary control wiring

Precautions:

• Before going for trouble shooting, make sure that system should be isolated from the operation
• Dangerous voltage capable of causing shock is present in this system. Use extreme caution when handling, testing and adjusting. Only qualified personnel should service.
• Replace failed MCB’s, Indication lamps & Contactors etc... with exactly same specification / rating after fault analysis.

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