Soft starters are used in applications that require speed and torque control are required only during startup (and stop if equipped with soft stop) or where there is a need to reduce large startup inrush currents associated with a large motor is required. They are also used when the mechanical system (the lond) requires a gentle start to relieve torque spikes and tension associated with normal startup (for example, conveyors, belt-driven systems, gears, and so on). And they are used for pumps to eliminate pressure surges caused in piping systems when fluid changes direction rapidly.
