Star Delta Starter

A Star Delta Starter is a widely used starting method of electric motors. A motor starter is an electrical or electronic circuit composed of electro-mechanical and electronic devices which are employed to start and stop an electric motor. Regardless of the motor type (AC or DC), the types of starters differ depending on the method of starting the motor. This is a starting method that reduces the starting current and starting torque. The device normally consists of three contactors, an overload relay and a timer for setting the time in the star-position (starting position). The motor must be delta connected during a normal run, in order to be able to use this starting method. The received starting current is about 30 % of the starting current during direct on line start and the starting torque is reduced to about 25 % of the torque available at a D.O.L start. This starting method only works when the application is light loaded during the start. If the motor is too heavily loaded, there will not be enough torque to accelerate the motor up to speed before switching over to the delta position.

Specification:

Reference Standards: Conforms to IS 13947-4, IEC 60947-4.

HP Range: 15 to 400 HP.

Voltage: 415 Volts AC.

Motor Rating: AC-3 Duty.

Version: SS Enclosure.

Protection Class: IP 54.

Reset Mode: Semi Automatic & Fully Automatic.

Rated insulating voltage: 690V.

Brands Available: L&T, SIEMENS, HAVELL’S, SCHNIDER, BCH, etc.

Secondary links

Star Delta Starter