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pranayshah
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Join Date: Nov 2007
Posts: 9

generator earthing

11/18/2007 2:47 AM

What will happen if more than two generators are running in synchronous mode and we will keep the ngr of any two generator in line?
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ramvinod
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Join Date: Jun 2007
Location: chennai,India
Posts: 592
Good Answers: 19
#1

Re: generator earthing

11/18/2007 12:37 PM

When Two Generators operate in parallel, there will be 3rd harmonic circulation current through neutral path,which is not permissible, therefore one of the neutrals should be floating,when these operate in parallel.Therefore only one neutral to be earthed.

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 Ramesh,Freelance Electrical/automation Consultant
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pranayshah
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Join Date: Nov 2007
Posts: 9
#2

Re: generator earthing

11/20/2007 12:18 AM

If the alternator is not in line ans what will happen if we keep ngr of that aternator in line
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ramvinod
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Join Date: Jun 2007
Location: chennai,India
Posts: 592
Good Answers: 19
#3
In reply to #2

Re: generator earthing

11/20/2007 1:43 AM

When Two sets are operating in parallel you have to make one neutral floating and other neutral to be connected to the earth thro NGR.If the sets are in operation individually then NGR to be connected to the circuit.

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 Ramesh,Freelance Electrical/automation Consultant
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