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:
- Total capacitive charging current (It).
- Neutral earthing transformer secondary current.
- Required grounding resistor value at primary side (Rp).
- Required resistance value at secondary side (Rsec).
- Neutral earthing transformer X/R Ratio
- Fault current through neutral – single line to ground fault (If)
- 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 Premium Membership |
Frank D. Nouahn
what is maximum amperage rating for 3 phase 100KVA transformer at continue load?
Tahir
Well, i got it. Thanks sir.
James K
am unable to download please send the sheet to Thomkajawa@gmail.com
Thom James Kajawa
Good day sir
I have not yet used the spread sheet but is it able to calculate size of grounding wire of 3 phase transformers.
Navaneeth
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
Edvard
Will be fixed very soon, please be patient… Tnx!
ranko
I am unable to download the sheet.
Can you kindly send the same to me at my email address
Edvard
Try now, it’s fixed.
kamlesh shah
I am unable to download the sheet.
Can you kindly send the same to me at my email address
Edvard
Try now, it’s fixed.
nitin
I am unable to download the sheet.
Edvard
Try now, it’s fixed.
saugat poudel
Sir, thanks for upload. How do you determine the transformer overloading factors?
Did you follow any standards? Please reply…
Ugyen Thinley
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
Edvard
Try now, it’s fixed.
Ramkumar
how to download, please give idea to download ur spread sheet
Deepak Dubey
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