I have a 6km run of 6x 800mm XLPE 33kv rated cable (2xpostive 2x Neg , 2xNeutral ) for 25kv rail system. The run consists of 6 joints for each cable. Spec says to DC pressure test at 76kv , which i understand is a pass / fail test.. Considering the amount of moisture in jointing pits when joints...
It is Factory tested by siemens @ 6.9kv ac for 1min pre&post megger @1000v on bus through closed breakers
My test plan requests(client spec.) 2.5kv ac for 1min , on bus with breakers closed.
My query is why test with ac ??? when it is DC specific equipment ?
These are feeder's only there is...
