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nitihravate
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Join Date: Jul 2012
Posts: 2

Voltage Calculation of Step up Transformer

07/20/2012 1:26 AM

suppose in a 3 phase step up transformer if we have shorted u1, u2 & gave 415 supply to between v1 & w1 what will be voltage between u2-v2, v2-w2 & u2-w2
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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: Voltage calculation of step up transformer

07/20/2012 3:20 AM

If the transformer's circuit protection equipment is correctly installed and working, zero in each case.

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Anonymous Poster #1
#2

Re: Voltage Calculation of Step up Transformer

07/20/2012 4:11 PM

PW

Would you translate the u's, v's and w's to English, as in primary and secondary terminals, if that is what they are.

Thanks
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LAA_Lucke
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Join Date: Feb 2010
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#3

Re: Voltage Calculation of Step up Transformer

07/21/2012 5:51 AM

Without any information on the connection type or schematic, then unknown.
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engineertony
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Join Date: May 2011
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#4

Re: Voltage Calculation of Step up Transformer

07/21/2012 12:32 PM

What is the transformer stepping up to? What is the target? Why would you want to do this?

In normal use, connecting u1 & u2 will have no effect on the phase to phase output volts if the secondary is otherwise isolated. Relative to the primary neutral it will have 240vac added vectorially.

Connecting 415vac between two phases of the primary will induce something in the secondary windings defined by the way the flux devides in the three (or five) limbs. So the volts you ask for cannot be calculated without a lot more information.

Sounds like an exam question posed by an academic with no experience of the practical world.
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electricalexpert65
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Join Date: Oct 2009
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#5

Re: Voltage Calculation of Step up Transformer

07/29/2012 9:37 AM

What is the vector group of the trf?
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Anonymous Poster (1); electricalexpert65 (1); engineertony (1); LAA_Lucke (1); PWSlack (1)

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