Question
Download Solution PDFDOL Starter is used for motors having capacity:
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFThe direct on line (DOL) starter method of an induction motor is simple and economical. In this method, the starter is connected directly to supply voltage. By this method, small motors up to 5 kW rating are started to avoid the supply voltage fluctuation.
The star-delta starter method of starting three-phase induction motors is very common and widely used among all the methods. In this method, the motor runs at delta connected stator windings. It is also used for small motors up to 5 kW rating.
The Autotransformer is used in both the type of the connections, i.e., either star connected or delta connected. The autotransformer is used to limit the starting current of the induction motor. This method is used for the high rating of squirrel cage induction motors. So, this method is most suitable for a 20 kW squirrel cage induction motor.
3-point and 4-point starters are used for the starting of DC motors.Last updated on Jun 11, 2025
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