Practical guide for ground grid design
Practical guide for ground grid design
(OP)
I'm working on the expansion of an outdoor substation, and I'm looking for a practical guide to design the new earth grid. I have limited information on the existing one. Earth resistivity tests are beeing done now.
Any suggestion on such a practical guide??
It's a 25 kV sub, with 2 txfos (25kV/4kV & 25kV/600V both resistance grounded), capacitor bank, breakers etc.., the actual fence will be moved about 20 feet out on each side.
Thank you
JL
Any suggestion on such a practical guide??
It's a 25 kV sub, with 2 txfos (25kV/4kV & 25kV/600V both resistance grounded), capacitor bank, breakers etc.., the actual fence will be moved about 20 feet out on each side.
Thank you
JL






RE: Practical guide for ground grid design
I think you have no problem to calculate the GROUNDING GRID FAULT CURRENT.
In order to build a Grounding Grid and calculate GPR and Touch and Step Potential this link may be useful:
http://www.erico.com/public/library/fep/LT0359.pdf
regards
RE: Practical guide for ground grid design
RE: Practical guide for ground grid design
the IEEE Std 80 helped a lot. Good "step by step" design procedure.
JL
RE: Practical guide for ground grid design
The CDEGS 2003 Users' Group Conference included a paper on the Assessment of Earthing Systems at Existing Substations by Mark Davies and Matthew Taylor, Strategy & Solutions Ltd, UK. You might get information on this at the SES website http://www.sestech.com/. If not, you could contact SES to get a copy.