Partial Discharge on Outdoor Terminations

Cable terminations are often used outside on riser poles or substation structures to convert cables to overhead lines or busses. These terminations convert the very tightly controlled cable electric field into an uncontrolled air insulated application. When applied properly, the field strengths are less than the insulation strength and therefore no partial discharge exists.

Under certain circumstances, even a well applied termination can have partial discharge as a result of contamination.

This case study with pictures and PRPDs examines how uneven contamination buildup on terminations can be proactively found using EA Technology UltraTEV Plus 2 with the UltraDish attachment to schedule cleaning and then scanned again to confirm successful cleaning