Can anybody explain, what is the idea behind having 100% insulation level and 133% insulation level in testing XLPE, EPR medium voltage cables?
Thank you
i have an outdoor Transformer of 500KVA, 13.9 /.6 KV, The low voltage side Y is grounded by the transformer,and a feeder cable is connected to the main panel inside the building.
when i shut down the main panel, i found that there is a 0.9 amp flowing from the nuetral cable to the ground inside...