A soft starter is a solid-state device that protects AC electric motors from damage caused by sudden influxes of power by limiting the large initial inrush of current associated with motor startup. They provide a gentle ramp up to full speed and are used only at startup (and stop, if equipped).
What is the difference between a VSD and a soft starter?
With a soft start starter, the motor is reduced when voltage is started; and then when the motor is at full speed, or a timing circuit has timed out, a ‘running by-pass contractor pulls in and the motor continues to run at full base speed. The cost for a soft start starter is much less than a VSD or VFD.
What is meant by motor starter?
The Many Types of Electric Starters. A Starter is a device that controls the use of electrical power to equipment, usually a motor. As the name implies, starters “start” motors. They can also stop them, reverse them, and protect them. Starters are made from two building blocks, Contactors and Overload Protection.