Definition [t-head1-first]

Motor-protective circuit-breakers are circuit-breakers used for switching, protection and isolation of circuits primarily associated with motor loads. At the same time, they protect these motors against destruction from locked-motor starting, overload, short-circuit and phase-failure in three-phase power supplies. They have a thermal release for protection of the motor winding (overload protection) and an electromagnetic release (short-circuit protection).

The following accessories can be fitted to motor-protective circuit-breakers: