Electrical engg

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rangacharya Active Contributor Join Date: Dec 2007 Posts: 23	Electrical engg 01/10/2008 6:48 AM
	What is UNITY TRANSFORMER and where and why it is used. Rangacharya
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Smart_Viral Associate Join Date: Dec 2007 Location: Amman, Jordan Posts: 27 Good Answers: 1	#1 Re: Electrical engg 01/10/2008 7:00 AM
	it is an isolation transformer that has the same number of winding on each coil. used in DC blocking Radio Frequency Interference (RFI) blocking Ground lift and device isolation Protection from EMP :p http://en.wikipedia.org/wiki/Isolation_transformer __________________ eeNode.net
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mixit Commentator Join Date: Sep 2007 Location: Here, there and everywhere... Posts: 61	#2 Re: Electrical engg 01/10/2008 9:09 AM
	The 1:1 isolating transformer can also be used to isolate parts of a circuit in the event of an earth (ground) fault. __________________ An EXPERT is a 'has been', that is a drip under pressure - My Boss
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biswanath.das Power-User Join Date: Oct 2006 Location: Kolkata, India Posts: 447	#3 In reply to #2 Re: Electrical engg 01/11/2008 12:33 AM
	Sometime we use 1:1 transformer in Main Lighting Distribution Board to reduce the fault current flowing to downstream Lighting DB where fault level is 9 to 10 KA. __________________ BNDas
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