RPM, Votage, Current or Time Delay Relays for capicitor start circuit

Aug 18, 2005 1 Replies

I am looking to finalize my rotary phase converter and am trying to size up the disconnect relay for the capacitor start. My idler runs about 18 amps with no load. It is a 15 hp 37 amp motor. How do I size these relays? Do I need some special equipment for the speed sensing relay?



I would recommend that you have a look at this article.

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regards. Ignacio Simón Yarza. Mech & electronic-electrical engineer.

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