NER Calculation for the Alternator - CR4 Discussion Thread

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gaikwad.nagesh Member Join Date: Sep 2011 Posts: 6	NER Calculation for the Alternator 11/03/2011 3:27 AM
	Q) Please guide me for the calculation of NER for alternator. For this calculation I have refered below Alternator stability curve i have calculated NER value 386 ohm for 25 amp for 1 sec appication, but i am not sure for this selection So please guide me for this selection
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electricalexpert65 Guru Join Date: Oct 2009 Posts: 2061 Good Answers: 169	#1 Re: NER calculation for the alternator 11/03/2011 8:05 AM
	What is the rated voltage of the alternator?
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gaikwad.nagesh Member Join Date: Sep 2011 Posts: 6	#2 In reply to #1 Re: NER calculation for the alternator 11/03/2011 8:32 AM
	Alternator rated votage is 11 kV
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electricalexpert65 Guru Join Date: Oct 2009 Posts: 2061 Good Answers: 169	#3 In reply to #2 Re: NER calculation for the alternator 11/03/2011 10:15 AM
	NER Rating is: Phase Voltage / Desired Earthfault Current In your case, this is:6350 / 25 = 254 Ohms.
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