1. SDF (Switch Disconnector Fuse)
|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 )
|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
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)
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.
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.