SJR2-3000 Series soft starter with inbuilt bypass contactor the soft starter provides complete motor protection functions including start control, running and overloading, phase failure, three-phase unbalance, over-voltage, under-voltage protection and so on with no need to further install bypass contactor and thermal relay, therefore, as another great achievement in the intelligentization of motor protection and networked technology application, it simplifies the circuit, reduces the volume, cuts the cost, makes installation and using more convenient.

Power supply: Three-phase AC 380V or 660V± 15%, 50 Hz or 60 Hz commercial power, private power station or diesel generator set, the power capacity must meet the soft starter's starting requirements on motor.
Applicable motor: Three phase squirrel-cage asynchronous motor, the rated power of the motor should match that of the soft starter.
Start frequency: No requirements, the specific frequency shall be depended on the loading.