Star delta starter control circuit diagram

 

Star delta starter control circuit diagram

Star-delta starting is widely used in electrical engineering for starting three-phase asynchronous electric motors. This device is used to reduce & lquo; risks & rquo; direct start. In fact, the intensity of the starting current (direct) is very high with respect to the nominal current of the motor (approximately 5 to 7 times the nominal current). 

On large motors, these high currents lead to overloads on the power supply lines (wires, cables, terminals) and on protection and control devices (fuse, disconnector, contactor, thermal relay, etc.) resulting in wear. , see premature destruction of the starter components.

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.

 

Star delta starter control circuit diagram

Star-delta starting is widely used in electrical engineering for starting three-phase asynchronous electric motors. This device is used to reduce & lquo; risks & rquo; direct start. In fact, the intensity of the starting current (direct) is very high with respect to the nominal current of the motor (approximately 5 to 7 times the nominal current). 

On large motors, these high currents lead to overloads on the power supply lines (wires, cables, terminals) and on protection and control devices (fuse, disconnector, contactor, thermal relay, etc.) resulting in wear. , see premature destruction of the starter components.

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.