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sanjiv_rani
Participant

Join Date: Mar 2008
Posts: 4

Transformer & Earthing

03/31/2008 3:37 AM

Dear all,

Pl. let me know about 1)what is the earthing pit value for transformer neutral, x-mer earth, lighting arrestor, electronics instruments, as per indian electricity rull & on what basis these values decides.

2) How many X-Mer design configurations like one dy-11 means primary is delta & sec. is star, so pl. describe all the vector groups in detail.
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V.I.Abraham
Guru
Safety - ESD - New Member India - Member - New Member Engineering Fields - Energy Engineering - New Member

Join Date: May 2007
Location: Pune , India
Posts: 875
Good Answers: 42
#1

Re: Transformer & Earthing

03/31/2008 1:16 PM

Hi,

Please read earlier threads where answers for same question is available.

Please read the following link and if you have any further doubts after reading that come back

http://en.wikipedia.org/wiki/Vector_group

IS of earthing is also available in earlier threads
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Anonymous Poster
#2

Re: Transformer & Earthing

04/02/2008 10:48 AM

TRANSFORMER NUETRAL TO BE EARTHED DIRECTLY.IT IS PREFERABLE TO ACHIEVE LESS THAN ONE OHM,IF NOT PROVIDE PARALLEL EARTHING AND INTERCONNECT.

REG TRANSFORMER VECTOR GROUPS IT IS AVAILABLE IN ENGINEERS HAND BOOK OR TX HAND BOOK

JANAMOTTMAC
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