Star Delta Control Circuit | Star Delta Power Wiring | Star Delta Control Wiring


In this video you will learn about Star Delta Starter.Star Delta Starter Control Circuit || Star Delta Control Wiring


A star delta starter is the most commonly used method for the starting of a 3 phase induction motor. In star delta starting an induction motor is connected in through a star connection throughout the starting period. Then once the motor reaches the required speed, the motor is connected in through a delta connection.
A star delta starter will start a motor with a star connected stator winding. When motor reaches about 80% of its full load speed, it will begin to run in a delta connected stator winding.
A star delta starter is a type of reduced voltage starter. We use it to reduce the starting current of the motor without using any external device or apparatus. This is a big advantage of a star delta starter, as it typically has around 1/3 of the inrush current compared to a DOL starter.
Advantages of Star Delta Starter
The advantages of star delta starters include:
1. Inexpensive
2. No heat is produced, or tap changing device needs to be used, hence efficiency increases.
3. Starting current reduced to 1/3 of direct online starting current.
4. Produce high torque per ampere of line current.
Disadvantages of Star Delta Starter
The disadvantages of star delta starters include:
1. Starting torque is reduced to 1/3 of full load torque.
2. A particular set of motors required.

Watch video for full information of Star Delta Control circuit

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