Specification :

The Star/ Delta starter requires a six terminal motor that is delta connected at the supply voltage. The Star Delta starter employs three contactors to initially start the motor in a star connection, then after a period of time, to reconnect the motor to the supply in a delta connection. While in the star connection, the voltage across each winding is reduced by a factor of ( 1 / .' / ' 3) [ 1 divided by root three] . This results in a start-current reduction to ( 1 / .' / ' 3) [ 1 divided by root three] of the DOL start current and a start torque reduction to one t