Star-Delta starter is the most commonly used method for the starting of a 3 phase induction motor. In star delta starting an induction motor is connected through a star connection throughout the starting period than once the motor reaches the required speed the motor shifted to Delta connection. Soft starter is a solid state device that protects motor from damage caused by sudden influxes of power by limiting the large initial inrush of current associated with motor startup. It provides a gentle ramp up to full speed and used only at startup.