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EnB
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Join Date: Aug 2008
Location: Nigeria, West Africa (+1 GMT)
Posts: 46

Transformer Neutral-Ground Connection

11/16/2009 3:04 AM

Hi,

Is it necessary to link a transformer neutral to the ground/earth-ing point on the transformer chasis?

What will be the effect of not doing so?

Regards,

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electricalexpert65
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Join Date: Oct 2009
Posts: 2061
Good Answers: 169
#1

Re: Transformer Neutral-Ground Connection

11/16/2009 8:50 AM

It is not necessary. Rather, I would suggest to connect the transformer neutral seperately to an earth electrode and connect the earthing point of the transformer chassis seperately to an earth electrode. Now, link these two earth electrodes at ground level only.
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PWSlack
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United Kingdom - Member - Indeterminate Engineering Fields - Control Engineering - New Member

Join Date: Jan 2007
Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on.
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#2

Re: Transformer Neutral-Ground Connection

11/16/2009 9:12 AM

It's the difference between a TT earthing system and an IT system. For further information, check out the Wikipedia article on earthing systems.

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Anonymous Poster
#3

Re: Transformer Neutral-Ground Connection

11/17/2009 1:37 PM

Depends on the electrical system that you might have or want ...IT ot TT or TNS...

Seperating the N & T via a Knife switch and passing it through a Current transformer will enable you to have a neutral Earth fault protection relay..
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