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Dahlander Connection

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Hi all

Can anyone explain me in detail about Dahlander connection for Two speed motors.


I need to design a control panel for Twin Speed Motor. I've learned the control wiring to be provided in the panel and how it is to be connected to the motor.


But i wanted to learn about the internal connections,how the cicuit get completed.

How the motor runs in High speed when run in Delta and in low Speed when run in star?


Is there any connection where "motor runs in low speed when connected in delta and runs in high speed when connected in star?


i would appreciate if anyone could give me an explanation with a diagram,so that i can learn about it.


Thanks and Regards





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To go through internal connection and explain operation would be very difficult in this forum. Have you tried doing a google search. There's plenty of great information available on the internet.




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