Star delta starter control circuit diagram

 

We use Star and Delta Connection when the phase voltage is lower than line voltage in star connection, so the motors or drives connected in star connection runs at lower speed as compared to delta connection. Star Connection is prefferable in transmission system as the voltage insulation required is less. Delta connection is used in Distribution system.

 

We use Star and Delta Connection when the phase voltage is lower than line voltage in star connection, so the motors or drives connected in star connection runs at lower speed as compared to delta connection. Star Connection is prefferable in transmission system as the voltage insulation required is less. Delta connection is used in Distribution system.