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surseco_1
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Join Date: Nov 2009
Posts: 1

Transformer Banking

11/04/2009 1:26 AM

What is the effect if we bank 2 units transformer with different KVA rating to produce 3-phase connection?
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Re: Transformer Banking

11/04/2009 2:05 AM

Mismatch of per-unit impedance and hence unbalance on both sides. That is provided your load conforms to the lower rating transformer.
perry
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Join Date: Dec 2006
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Re: Transformer Banking

11/04/2009 7:33 AM

surseco; i see this done all the time, you might have a 50 kva single phase 240/120 volt transformer & need 3 phase for a air compressor, or ? , you add a 25 kva single phase 240 volt transformer to make a open delta 3 phase power bank. perry
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