Partial electrical breakdown occurs in an insulation system between electrodes energised by the system supply voltage. The breakdown does not bridge the electrodes, i.e. voids, cracks, contamination ext.
Partial discharges (PD) represent tiny little arcs that, only partially bridge small portion of electrical insulation between phase conductor and ground or between two phase conductors which occurs in the voltage and insulation domain.
On-Line condition assessment of the “C” Type terminations was conducted with the power circuits in operation. It is important to conduct these assessments when the plant is subject to the full combination of thermal, electrical and mechanical stresses that it is subject to while in service.
Terminations are an important part of the cable network. If the installation instructions are not followed by the installer or incorrect material supplied, then the termination can lead to premature failure of the plant.