Generator 3 Phase 4 Wire and Delta-Wye Transformer

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witthawat Participant Join Date: Oct 2011 Posts: 2	Generator 3 Phase 4 Wire and Delta-Wye Transformer 10/14/2012 11:46 PM
	Generator 400/230 VAC 3 phase 4 wire. Can it connect to delta-wye step up transformer ? How about the vector group of transformer ? and star point of the generator could be connected to ground or not.
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PWSlack Guru Join Date: Jan 2007 Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on. Posts: 32175 Good Answers: 839	#1 Re: Generator 3 phase 4 wire and delta-wye transformer 10/15/2012 3:10 AM
	A1) Yes, it can. A2) OK, what about it? A3) Follow the wiring codes applicable to the country of installation. __________________ "Did you get my e-mail?" - "The biggest problem in communication is the illusion that it has taken place" - George Bernard Shaw, 1856
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baxterm Power-User Join Date: Oct 2008 Location: Thousand Islands, Ontario, Canada Posts: 187 Good Answers: 9	#2 In reply to #1 Re: Generator 3 phase 4 wire and delta-wye transformer 10/16/2012 2:11 AM
	Very good, but if you are wiring delta-wye, why would you? The ground/neutral will be provided on the wye side.
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LAA_Lucke Guru Join Date: Feb 2010 Posts: 1013 Good Answers: 36	#3 Re: Generator 3 Phase 4 Wire and Delta-Wye Transformer 10/16/2012 8:30 AM
	You can connect the Generator 3 phases to the Delta side of the transformer, provided the voltage rating is correct. You can connect the Star point of the genset to ground. It will serve to trigger any protection device on the Gen side with the primary delta winding. The vector group of the Transformer is stamped on the nameplate and remains the same while having nothing to do with connecting the Generator (Unless you are parallelling the transformer ... The secondary winding, Wye, will have a central point, the Neutral, which can be connected to ground to allow the proper functioning of protective devices downstream of that 2ndary winding.
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baxterm (1); LAA_Lucke (1); PWSlack (1)

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