On-Line Partial Discharge (PD) Test Services

PD Testing of HV Cable Sealing Ends

The failure of Outdoor High Voltage Porcelain Cable Sealing ends from Internal Partial Discharge can be catastrophic with explosion and flying debris the typical result. Over the past 12 months, HVPD has developed new software and measurement techniques which allow for the On-line PD Testing of outdoor HV Cable Sealing Ends. The main requirement for these tests is how to discriminate between the highly dangerous, internal PD activity and the relatively benign surface discharges and corona which are present on outdoor plant.

HVPD utilises the HVPD-Longshot™ Unit with 1x TEV and 3x Shielding Antennae sensors with the ScopeControl© software's new TOF (Time of Flight) Software Module to enable tests to be made quickly and easily. This creates a shielded measurement set up by placing the 3x RF Antennae around the Cable Sealing End under test in addition to the directly coupled TEV sensor. Time-of-flight analysis is then used to discount interfering signals that are coming from outside the shielded area.