Power Cables

Partial Discharge (PD) testing and monitoring for power cables

On-line PD Testing and Monitoring of Power Cables

Partial Discharges can occur at various points in power cables and cable accessories (joints/splices, terminations and cable sealing ends) and can eventually lead to an insulation failure. Sources of PD include voids in the insulation and at insulation or semiconducting layer interfaces. In the case of paper insulation (e.g. PILC cables), PD can also occur at delaminations. By PD testing and monitoring, the development of underlying defects can be detected and insulation condition assessed.


High frequency current transformer (HFCT) sensors can be attached to facilitate testing and monitoring of cables.

Test Equipment

In-depth diagnostic spot testing using the HVPD Kronos® Spot Tester.

Monitoring Systems

Continuous monitoring of complete electrical networks using our HVPD Kronos® On-line PD Monitoring System.

Test Services

Comprehensive range of test services for on-line and off-line condition assessment.