220 V single phase motor connected to 220 v two phase

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pkalis
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220 V single phase motor connected to 220 v two phase

Post by pkalis » Thu Aug 04, 2005 12:40 pm

Is it possible to connect a 220 V single phase motor to 220 v two phase?
We have a generator with 220 V with a 4 pin socket Neutral ground and 2 phases.
If anyone has any ideas of how it could be done then I am looking forward to an answer.
Thanks

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Clyde Crashkop
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Re: 220 V single phase motor connected to 220 v two phase

Post by Clyde Crashkop » Thu Aug 04, 2005 12:59 pm

That sounds like a single phase gen. to me. Use a meter to find 2 outputs that have 220V across them and use them. They are line 1 and line 2.

pkalis
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Re: 220 V single phase motor connected to 220 v two phase

Post by pkalis » Thu Aug 04, 2005 1:29 pm

Dave, thanks for the input. As I mentioned I cannot get 220v between neutral and phase I only get that between two phases, will this affect the motor?

b1miller
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Re: 220 V single phase motor connected to 220 v two phase

Post by b1miller » Thu Aug 04, 2005 1:57 pm

Most smaller generators will only produce single phase power anyway. As such, a 220 single phase motor will run just fine connected between the 2 hot output leads from your generator. If you measure across either hot lead to neutral, you will get 120v. Across the 2 hot leads, you will get 220v. The other issue is the momentary high current drawn by the motor when starting. Depending on the size of the motor and generator, the generator could be overloaded by the starting current.

Dean Huster
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Re: 220 V single phase motor connected to 220 v two phase

Post by Dean Huster » Fri Aug 05, 2005 4:33 pm

Your generator is providing exactly the same type of power that your electric power company provides, through a 240-volt, center-tapped transformer where you obtain 120v between neutral and either hot side or 240v across the two hot leads. Power is generally referred to as single-phase and three-phase, even though the 120/240v volt system is technically a two-phase system with reference to the neutral connection. But you're still using a single phase when connected across the "outer legs" of the transformer.<p>Dean
Dean Huster, Electronics Curmudgeon
Contributing Editor emeritus, "Q & A", of the former "Poptronics" magazine (formerly "Popular Electronics" and "Electronics Now" magazines).

R.I.P.

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