Are the towers that carry very high voltage lines grounded
to the earth or are the towers insulated from the earth?
- posted
18 years ago
High Voltage Towers Grounded?
Loading thread data ...
- posted
18 years ago
What do you consider high voltage?
Actually all transmission (nearly all) structures are grounded and most distribution poles are as well.
Charles Perry P.E.
Actually all transmission (nearly all) structures are grounded and most distribution poles are as well.
Charles Perry P.E.
- posted
18 years ago
in article snipped-for-privacy@corp.supernews.com, Al Smith at
snipped-for-privacy@yahoo.com wrote on 6/11/04 1:30 PM:
They are grounded whether you want them so or not.
Bill
They are grounded whether you want them so or not.
Bill
- posted
18 years ago
Hello All
I think Charles is in the USA. It is not clear where the questioner is. In the UK Wood Pole lines up to 132 kV would only have local earths where it was necessary for operational reasons eg at switching points, or where there were cable connections
John
I think Charles is in the USA. It is not clear where the questioner is. In the UK Wood Pole lines up to 132 kV would only have local earths where it was necessary for operational reasons eg at switching points, or where there were cable connections
John
- posted
18 years ago
Yes, grounded. In fact the term counterpoise was developed
to
enhance grounding of those towers.
Al Smith wrote:
Al Smith wrote:
- posted
18 years ago
I believe the reference makes sense only to metallic (typically steel)
towers. Wood pole lines in North America would also not have the poles (or
mounting bolts, etc) grounded. However there may well be multiple grounds of
an overhead ground wire if one is present.
- posted
18 years ago
in article tFtzc.720363$Pk3.91101@pd7tw1no, Don Kelly at snipped-for-privacy@peeshaw.ca
wrote on 6/14/04 8:02 PM:
Nevertheless, cross-arm fires do get started from time to time.
Bill
Nevertheless, cross-arm fires do get started from time to time.
Bill
- posted
18 years ago
---------
Sure but grounding of hardware (bolts, braces, etc ) won't prevent this. In
fact the likelihood of fires will likely increase as the "wood" path is
shorter. I doubt whether cross-arm fires are a serious consideration for
utilities and grounding these is generally not cost effective. .