Linking the overload relay into the control system [t-head1-first]

We recommend using an external overload relay instead of a motor-protective circuit-breaker with built-in overload relay. This allows controlled ramping down of the soft starter through the control section in the event of an overload.

Note:
Connecting the motor directly to mains power can cause overvoltage and destruction of the soft starter’s semiconductors.

Note:
The overload relay’s signalling contacts are linked into the On/Off circuit.

In the event of a fault, the soft starter decelerates for the set ramp time and stops.