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ronald A.
Active Contributor

Join Date: Mar 2010
Posts: 22

NGR

05/22/2010 2:36 AM

question to ask.

Is it possible to have 3phase, 4wire system with NGR.
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sidhu16
Commentator
India - Member - New Member Engineering Fields - Electrical Engineering - New Member Technical Fields - Technical Writing - New Member

Join Date: Feb 2010
Location: India
Posts: 92
Good Answers: 2
#1

Re: NGR

05/22/2010 10:13 AM

Under 600V system, it is not required to insert NGR. Because-

1. Low earth fault current

2. No sustained earth fault.

3. Easy detection of fault.

4. Easy protection .
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electricalexpert65
Guru

Join Date: Oct 2009
Posts: 2061
Good Answers: 169
#2

Re: NGR

05/23/2010 7:38 AM

Theoratically and Practically possible. But, legally? Depends on which country you are from. If you are from India, it is a strict "no-no". In India, Low Voltage Systems can only be solidly earthed. If you are from US, then, yes! IEEE strongly recommends you to go for NGR Earthing in LV too.
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