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mir imran altaf
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Join Date: Apr 2011
Location: india
Posts: 21

Testing of Three Phase Transformer

07/13/2012 5:07 AM

if we short LV blue phase(b) and HV blue phase(B) of 33kv/430v 1ooKVA step down transformer and supply a single phase voltage to HV red (R) phase with respect to Y phase then what would be the other voltages for a transformer to work normally.

ie. RY voltage is known(say it is 200v) what would be the values of:

RB, YB, ry,rb,yb...

what this test z called???

thanking in advance
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PWSlack
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United Kingdom - Member - Indeterminate Engineering Fields - Control Engineering - New Member

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.
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#1

Re: testing of three phase transformer

07/13/2012 5:18 AM

Does it say do this in the equipment manufacturer's commissioning instructions? Come to think of it, where is the manufacturer's Commissioning Engineer in all this?

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silverfox
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#2

Re: Testing of Three Phase Transformer

07/13/2012 6:56 AM

Can only agree with Mr Slack on this. The questions you are asking suggest you are a little out of your depth.
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Tornado
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Technical Fields - Technical Writing - New Member Engineering Fields - Piping Design Engineering - New Member

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Location: Richland, WA, USA
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#3

Re: Testing of Three Phase Transformer

07/13/2012 7:14 AM

Hmm.... This sounds like a good Newsletter Challenge.

The energized primary winding will induce voltages in the other two, but not in normal 120° phase relationship....

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electricalexpert65
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Join Date: Oct 2009
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#4

Re: Testing of Three Phase Transformer

07/13/2012 11:10 PM

This, in fact, is called the vector group test in transformers.
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fixitorelse
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Join Date: Aug 2010
Posts: 687
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#5

Re: Testing of Three Phase Transformer

07/14/2012 3:37 PM

Goggle

PROF. V. G. PATEL, he has a paper posted on web that explains this test.

Fixitorelse
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