The intelligent motor soft starters are suitable for three-phase AC squirrel-cage asynchronous motors with input voltage 220V, 240V, 380V, 400V, 440V, 460V, 480V, 690V, frequency 50Hz/ 60Hz, rated current 11A to 1200A and rated power ranging from 5.5 kW, 7.5 kW, 11 kW ... 450 kW, 500 kW, 600 kW. This motor soft starter is a device type and it is necessary to install a circuit breaker for short-circuit protection function and AC contactor for bypass in the cabinet, and cooperate with the switch to form a motor control circuit.
- The series soft starters have perfect motor protection functions during the motor starting and running without installing thermal relays.
- The closed-loop control in soft starter greatly improves the stability and reliability of the soft torque starting and soft torque stopping of the motor.
- The AC motor soft starter operation adopts bypass contactor so that the operation power consumption is close to zero, which not only improves the reliability but also reduces the overall size.