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Spreadsheet to calculate the size of neutral earthing transformer
Spreadsheet to calculate the size of neutral earthing transformer

Earthing transformer

When the system neutral may not available, earthing transformer may be used to obtain the neutral. The neutral point of transformer to the earth ground network provides a reference point of zero volts.

This spreadsheet calculates following:

  1. Total capacitive charging current (It).
  2. Neutral earthing transformer secondary current.
  3. Required grounding resistor value at primary side (Rp).
  4. Required resistance value at secondary side (Rsec).
  5. Neutral earthing transformer X/R Ratio
  6. Fault current through neutral – single line to ground fault (If)
  7. Rating of neutral earthing transformer (P).
It might be interesting to read technical article about all types of neutral earthing in power distribution: Part 1 and Part 2.
Software:MS Excel Spreadsheet to calculate the size of neutral earthing transformer
Version:
Developer:Jignesh Parmar
Size:92 KB
Price:Free
Download:Right here | Get Download Updates | Get Technical articles
Spreadsheet to calculate the size of neutral earthing transformer
Spreadsheet to calculate the size of neutral earthing transformer

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Page edited by E.C. (Google).

13 Comments


  1. Navaneeth
    Sep 16, 2016

    Neutral to earth voltage is increasing from mV (no load) to 4V when the high pressure pumps are working ( total load reaches to 630 KW ).and the neutral current is 14 amps .Do u have any solution for the above .Using Generator for the source

  2. Edvard
    Edvard
    Feb 22, 2016

    Will be fixed very soon, please be patient… Tnx!


  3. ranko
    Feb 22, 2016

    I am unable to download the sheet.
    Can you kindly send the same to me at my email address


  4. kamlesh shah
    Jan 25, 2016

    I am unable to download the sheet.
    Can you kindly send the same to me at my email address


  5. nitin
    Jan 21, 2016

    I am unable to download the sheet.


  6. saugat poudel
    Jul 24, 2015

    Sir, thanks for upload. How do you determine the transformer overloading factors?
    Did you follow any standards? Please reply…


  7. Ugyen Thinley
    Jun 10, 2015

    I am unable to download the sheet.
    Can you kindly send the same to me at the following address.
    ugyenthinley71@gmail.com
    with best regards
    ugyen thinley


  8. Ramkumar
    Jul 13, 2014

    how to download, please give idea to download ur spread sheet


  9. Deepak Dubey
    Jul 13, 2014

    Dear Mr. Jignesh.
    I am unable to download the sheet.
    Can you kindly send the same to me at the following address.
    deepak-ps.dubey@alstom.com
    regards
    Deepak

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