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Anonymous Poster

NGR of Parallel Generators...

12/24/2010 4:22 AM

why only one NGR of paralleled generators should be ON.

what if that generator trips whose NGR is ON.

Is it ok to ground body of NGR panel.
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msamad
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Join Date: Feb 2009
Location: Houston, USA
Posts: 946
Good Answers: 244
#1

Re: NGR of Parallel Generators...

12/26/2010 9:23 AM

Why only one NGR of paralleled generators should be ON

See the thread http://cr4.globalspec.com/thread/36055/Neutral-Switch-for-Generators-at-Power-Station and you will find the answer.

What if that generator trips whose NGR is ON

The NGR operation logic is so designed that if this happens, the NGR of a running generator is automatically turned ON.

Is it ok to ground body of NGR panel

I am not sure what do you mean by body of the NGR. IF you mean the resistance itself, the answer is NO. If it is the NGR panel or the structure of the NGR (which is not electrically connected to the NGR), then the answer is yes.

- MS

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Anonymous Poster
#2
In reply to #1

Re: NGR of Parallel Generators...

12/27/2010 8:10 AM

Thanks sir for your simplified explanation ..

But would like to know how 3rd harmonic current among DGs will increase. (If four DG has exactly same, this will not occur)

& Circulating Neutral current among DGs will increase
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