to produce insulation effect
to stop the ionisation of the surrounding air
to ensure the operation of the device at a low temperature
to suppress the sparking produced across the connector at the time of breaking a circuit.
magnetic
thermal
magnetic and thermal
low voltage
oil circuit breaker (OCB)
miniature circuit breaker (MCB)
air circuit breaker (ACB)
air blast circuit breaker (ABCB)
Magnetic and thermal release
Thermal release
Magnetic release
Low voltage release
frequent tripping of ELCB
electric shock
fire hazard
excessive billing of energy