What are starters? Why we use them? What are the different types?

We know that the stator of an induction motor is directly connected to a three-phase supply. So, during the starting condition when the rotor speed is zero, the stator pulls 5-7 times the normal current from the supply. In small motors, this starting current is small but in big motors, the starting current is very large. So if a large current is drawn from the supply, the other devices connected to that supply will get affected. So to overcome this issue, starters were introduced between the motor and the supply. The main use of a starter is to supply low voltage in the starting and gradually increase the voltage.

There are different types of starters:

1. Direct Online Starter

2. Star-Delta Starter

3. Autotransformer Starter

4. Soft Starters

5. VFD Starters

6. Stator Resistance Starters

7. Slip Ring Motor starters

#thewatt