Motor circuit breaker

Motor circuit breaker are used to protect connected motors against overloading. They’re equipped with a thermal trigger for minimal overcurrent and an electromagnetic trigger for short-circuits. This motor circuit breaker has a 10 A tripping class. The thermal trigger starts to trip as of an amperage of 1.2 times nominal current and the electromagnetic trigger is tripped as of 7.2 times nominal current. If overloading occurs in any single phase, all three phases are interrupted when the circuit breaker is tripped. The circuit breaker has to be closed manually after tripping.

The symbol for the motor circuit breaker shows the switch in its open state. The circuit breaker is closed automatically when simulation in FluidSIM is started, so that it doesn’t have to be closed manually for each simulation.

Adjustable parameters

Designation Range Default value
Rated current 0.1 ... 100 A 0.5
Tripping temperature 50 ... 150 °C 80