
Soft Starters
A motor soft starter is a type of motor controller used to reduce the input frequency and voltage of its power supply during start- up. Soft starters are often the more economical choice for applications that require speed and torque control only during motor startup.
Soft starters are motor control devices that protect motors, the equipment they run, and the operators. When implemented with motors used for pumps, fans, air conditioners, conveyors, belt-driven systems, and other equipment and machinery, soft starters mitigate the stress on the motor and the equipment by limiting the motor’s torque from the initial inrush of current when started. Soft starters can control one to three phases, gradually increase the voltage until the motor reaches full speed, and then keeps it at full voltage until turned off. Soft starters are also known as reduced voltage soft starters (RVSS). Some soft starter models also allow for remote control to start and stop the motor, as well as monitor the motor’s run status.