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maiken
Active Contributor

Join Date: Feb 2009
Posts: 12

Neutral Grounding Question

05/10/2010 7:24 AM

If there is a mesh with 64 earthing rods, should the rods for transformer neutral grounding be separate or attached with the mesh?
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ieshiv
Associate

Join Date: May 2009
Posts: 40
Good Answers: 1
#1

Re: Neutral Grounding Question

05/10/2010 11:06 PM

The purpose of netural and general is different....Transformer neutral is grounded because your transformer
will be the impotant electrical equipment and this has to
be protected for fault i cannot have a neutral floating and
it has to be earthed properly. It is also earthed in order
to reduce the 3rd Harmonics effect.

I hope its now very clear to you.
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Alanvaderi
Power-User

Join Date: May 2010
Posts: 146
Good Answers: 2
#2

Re: Neutral Grounding Question

05/11/2010 4:13 AM

Neutral earthing is for getting proper potential difference in Y connection. It is recommended to have seperate earthing for Neutral.
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Anonymous Poster
#3

Re: Neutral Grounding Question

05/11/2010 8:05 AM

First of all let me congratulate you for asking a very good question.

As per TNEB (tamil nadu electricity board, india) rules, the neutral is also a part of the total earth grid.

The same applies to UPS neutral

Regards,

PG
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electricalexpert65
Guru

Join Date: Oct 2009
Posts: 2061
Good Answers: 169
#4

Re: Neutral Grounding Question

05/12/2010 10:18 AM

No need to have any doubt. You MUST connect the transformer neutral earth rods also to the substation earth mat to create an equi-potential plane.
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sridharganasen
Associate

Join Date: Oct 2009
Posts: 47
#5

Re: Neutral Grounding Question

05/13/2010 3:39 AM

the over all earth value is below 2 ohms its ok for transformer neutral grounding also
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Users who posted comments:

Alanvaderi (1); Anonymous Poster (1); electricalexpert65 (1); ieshiv (1); sridharganasen (1)

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