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Anonymous Poster

NGR caliculations

12/30/2008 6:41 AM

Dear Sir,

I am working in 25MW power project, How to caliculate required NGR(nuetal grounding resistaor) ohms. any body can help in this regards.

thanking you sir

M.SATYANARAYANA
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wareagle
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United States - Member - New Member

Join Date: Jun 2008
Location: Alabama
Posts: 1604
Good Answers: 63
#1

Re: NGR caliculations

12/30/2008 11:14 AM

NGR is used to limit the level of the fault current. You must determine the maximum fault you can withstand and then its just Ohms Law. You must also calculate the wattage of the resistor.
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biswanath.das
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Join Date: Oct 2006
Location: Kolkata, India
Posts: 447
#2
In reply to #1

Re: NGR caliculations

01/08/2009 2:15 AM

Refer Westing House T&DBook...

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