Electricity Pylon Earth Testing
Electricity Pylon Earth Testing
(OP)
I am aware of a product on the market from (I think?) ABB for testing of earth electrodes without disconnecting the overhead earth wire. I've looked all over the net for information on this product but can't find any.
Can anyone advise of such a tester?
Can anyone advise of such a tester?






RE: Electricity Pylon Earth Testing
Possibly http://www.aemc.com/products/html/view.asp?id=5
RE: Electricity Pylon Earth Testing
RE: Electricity Pylon Earth Testing
RE: Electricity Pylon Earth Testing
I've seen a variety of products which induce voltage using a current transformer but they can be of limited use when try to measure on the legs of towers (although I have seen one current clamp with a 320mm diameter).
The device I'm trying to track down uses high frequency current (some kHz), the principle behind it is that the path to earth via the tower ground wire has a high inductance and the HF current doesn't flow that way but through the local earth system.
(I'm almost certain it's an ABB product but I can't find it on their website(s))
RE: Electricity Pylon Earth Testing
RE: Electricity Pylon Earth Testing
" Tower ground resistance- can be used on an existing energized or de-energized power line tower with the shield wires connected or disconnected. Output includes tower ground resistance and expected error versus confidence level........"
For additional info check this site:
http://www.epri.com/newsletter.asp?issueid=5534&marketnid=8#ARTICLE3
There are schedule course for March, 2002 for "Integrated Grounding System Design & Testing" where the principal developer of this meter will have a section.
I highly recommend this course for those interested in understanding and modelling grounding systems.