Percent Impedance vs. Percent Regulation

dhanesh.koshti 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? __________________ Thanks
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msamad Guru Join Date: Feb 2009 Location: Houston, USA Posts: 947 Good Answers: 245	#1 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 __________________ "All my technical advices in this forum must be consulted with and approved by a local registered professional engineer before implementation" - Mohammed Samad (Linkedin Profile: http://www.linkedin.com/in/msamad)
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