Soft start starter is a motor control device which integrates soft start, soft stop, light load and energy saving and a variety of protection functions. It is mainly composed of three opposite parallel gate and electronic control circuit connected in series between the power supply and the controlled motor. In the starting motor, the soft starter makes the starting current of the motor rise linearly from zero to the set value by gradually increasing the thyristor opening Angle, so as to realize the smooth non-impact starting of the motor.
Soft starter has the following advantages
1. Smooth startup
The impact on the power grid when the motor is started is reduced, the peak value of starting current is reduced, and the reliability of power supply is improved.
2. Prolong life
The mechanical stress during start-up is reduced and the service life of the motor and related equipment is extended.
Energy saving: When the motor is in light load operation, the energy loss is reduced by reducing the voltage to achieve energy saving effect.
3. Protection function
It has a variety of protection functions, such as overload protection, overheating protection, etc., which improves the operation safety of the motor.
Soft starter is widely used in fans, pumps, conveyors and compressors and other loads, is the ideal replacement of traditional star/triangle conversion, autobuck, magnetic buck and other buck equipment. In addition, the design and manufacture of a multi-soft starter control cabinet not only saves equipment investment, reduces costs, but also improves the utilization efficiency of the control cabinet.