- Air Breaker must be serviced once in a year.
- Vacuum Breaker must be serviced once in a three year.
- Under Voltage Coil & Shunt Coil must be checked during servicing.
- Lubrication of all moving parts, closing & tripping coils.
- Operation checking of spring charging limit switch, tripping & closing mechanism.
- Checking of tripping & closing coil resistance.
- Relay current & delay timing setting must be checked in servicing.
