HV Surge arresters
HV Surge arresters
(OP)
Does anyone have any experience in installing HV (400 and 132 kV) surge arresters upside down, hanging on a metal gantry 20m above the ground?
I've seen this type of arrangement due to lack of space around a transformer. Are there any (electrical) disadvantages that may arise from this?
I am assuming from civil viewpoint it's not a good thing to hang heavy porcelain surge arrester.
I've seen this type of arrangement due to lack of space around a transformer. Are there any (electrical) disadvantages that may arise from this?
I am assuming from civil viewpoint it's not a good thing to hang heavy porcelain surge arrester.
May you grow up to be righteous, may you grow up to be true...






RE: HV Surge arresters
RE: HV Surge arresters
David Castor
www.cvoes.com
RE: HV Surge arresters
May you grow up to be righteous, may you grow up to be true...
RE: HV Surge arresters
RE: HV Surge arresters
We had a 115 kV arrestor mounted upside down that failed, although we could not conclusively identify the cause. The best guess at the time was that the attached bus work did not have enough thermal expansion joints which caused some deflection of the arrestor which combined with the upside down orientation to allow water ingress.
RE: HV Surge arresters
David Castor
www.cvoes.com
RE: HV Surge arresters
RE: HV Surge arresters
Alan
RE: HV Surge arresters
The side loading was not excessive, however it was cyclic which led to a theory that it had been flexed back and forth enough to allow water ingress.
Glad to hear others have had good experiences with upside down mounting.