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 IPEC High Voltage have 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.
IPEC HV utilise the OSM-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.
Long exposure photograph taken in the dark (left)
and the same photo with boosted brightness to
enable the background hardware to be seen (right).
© IPEC HV 2007