Electrical 
Basic troubleshooting of Electrical components in MCC/Electrical Control Panel/Switch Gear
1. SDF (Switch Disconnector Fuse)
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| Switch Disconnector Fuse |
Possible Fault:- Fuse Burning.
Identification:- Check the fuses continuity with a Multi Meter.
Cause:- Over Current, Short Circuit
Remedy:-Replace the Fuse with same rated(Current and Voltage) new one
2.MCCB/MCB (Miniature Circuit Breaker )
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| MCB / MCCB |
Possible Fault:- Tripping
Cause: Short Circuited current.
Remedy:- Rectify the cause produced the tripping current and once rectified the same. Put ON the MCCB/MCB
Rating :- Voltage, Current, Withstanding Fault Current
3.CONTACTOR
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| CONTACTOR |
Possible Fault:- Motor not starting.
Cause:- Contactor Coil faulty, Coil is not getting Power
Remedy:- Check the Power Supply voltage from Coil point. If coil is faulty replace with new one.
Rating:- Voltage , Current, Maximum fault withstand Current.
4.OLR (Overload Relay)
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| Overload Relay |
Possible Faults:- Motor not starting/Motor tripping continuously
Cause:- Relay Tripped, Current adjustment is faulty.
Remedy:- Release the tripped OLR switch, Adjust the current rating according to the Name Plate.
Ratings:- Current and Voltage.
5.RELAY
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| RELAY |
Possible Fault:- Not Working.
Cause: Coil faulty, No power, Contact got damaged
Remedy:- Check the power Supply voltage, Continuity between contacts, wiring faulty.
Ratings:- Coil Voltage, Current Ratings, Type of Contact.
