After the motor reaches a specific speed, the timer switches the winding connection to a Delta configuration to ensure the motor operates efficiently. When the motor is started, it is initially connected in a Star configuration to reduce the starting current, which can be up to 6 times the motor’s full-load current. The Star-Delta starter includes a control circuit that typically consists of a timer, contactors, and overload relays. This starter employs the star-delta (Y-Δ) method for starting the motor, which involves changing the motor’s winding connection from a Star configuration to a Delta configuration once the motor reaches a certain speed. Starting & Controlling of 3-Phase Motors Using Automatic Star-Delta Starter (Y-Δ)Ī Star-Delta starter is an electromechanical device used to start and control the speed of a three-phase induction motor.
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