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Commentator

Join Date: May 2009
Location: Mumbai
Posts: 73

Percent Impedance vs. Percent Regulation

10/07/2009 1:25 PM

Dear Sir,

In case of tranformer, % impedace is defined as "Drop in Secondary voltage in full load condition" but % regulation is also means same. then why this 2-different terminology is utilized? Is there any differance betwee them?

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Guru

Join Date: Feb 2009
Location: Houston, USA
Posts: 947
Good Answers: 245
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Re: Percent Impedance vs. Percent Regulation

10/07/2009 7:09 PM

% impedance is used for the transformer. It is also called % impedance voltage. It is related to transformer only. See http://cr4.globalspec.com/thread/43562 for detail.

% regulation is used for the % voltage drop at the load end from no load condition to the full load condition. It relates to a circuit which may or may not contain any (or more) transformer.

% regulation = (no load voltage – full load voltage) x 100 / (no load voltage)

% regulation (voltage drop) occurs due to the transformer % impedance, conductor impedance, internal impedance of power source etc.

So % impedance and % regulation is not the same.

-MS

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