All OK now and we energised this circuit Thursday past.
Construction had to repair several faults so I think they will be more carefull in the future.
We never found out what caused the 'tree tracks' and are unlikely to now.
Thanks for all your helpfull comments.
Cheers Neil
Hi...
IEC 62271-203 2nd Edition the reference for GIS above 52kV.
Quote: Some parts may be disconnected for the test, either because of their high charging current or because of their effect on voltage limitation, such as:
High voltage cables and o/h line;
Power transformers and occasionally...
Hi Guys
Thank you for all your comments, they are much appreciated and reinforced my thoughts..
Another factor has came to light...
The contractor has used the services of a sub-contractor 'specialist' to help with the location of the fault/s, so it looks like the third party's test gear may be...
[bigsmile]Any ideas folks any feedback would be appreciated?
Our Construction Dept. has had several cable sheath faults over the past few weeks. See attachment.
They are on the feeders which connect 11Kv RMU's.
The cables are new, the size is 3c x 300mm* CU/XLPE/SWA/PVC with graphite coating...
