Abstract
In this paper, on-site time domain dielectric response
measurements have been performed once a month on
medium voltage XLPE cable links with heat shrink joints
using a conventional 5 kV DC insulation tester. The main
purpose of this work has been to examine the
reproducibility of the measured currents. It is shown that
both the polarization and depolarization currents remain
approximately unchanged, and that they can provide
robust criteria for cable condition assessment. It is
advantageous to use the insulation tester before applying
any other more advanced diagnostic techniques.
measurements have been performed once a month on
medium voltage XLPE cable links with heat shrink joints
using a conventional 5 kV DC insulation tester. The main
purpose of this work has been to examine the
reproducibility of the measured currents. It is shown that
both the polarization and depolarization currents remain
approximately unchanged, and that they can provide
robust criteria for cable condition assessment. It is
advantageous to use the insulation tester before applying
any other more advanced diagnostic techniques.