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The measurement of Partial Discharges (PD) is a fundamental tool to assess the condition of HV Cable Systems
PD measurements highlight the presence of several types of on-going localized degradation processes. Therefore, PD measurement can provide a significant insight into the presence of harmful defects that can damage the cable insulation.
Diagnosis obtained from PD analysis allows Condition Based Maintenance (CBM) practices to be established.
For Extruded Polymeric Cables, the presence of PD within a cable system is to be avoided, in fact most of the internal activities within polymeric insulation systems can quickly lead to electrical treeing formation and, eventually, to failure.
Oil-filled Cables can better withstand PD activities, but several failures have been reported, particularly in accessories, which have been associated with PD activity.
Although PD are one of the major failure causes of cables and accessories a complete and modern Cable diagnostic system must give solutions also for tan-delta monitoring to cover other possible faults like watertrees. We provide a specific proprietary and innovative solution for tan-delta measurement, integrated with PD monitoring for a better diagnostic coverage at lower Customer costs.
Techimp Systems has now moved further on the edge of the technical excellence and innovation in diagnostics applied to cable applications, by developing the first PD-DTS (Distributed Temperature Sensing) integrated system exploiting fiber optics and PD sensors to monitor temperature and discharges along a cable, and integrating RTTR and PD in a unique system, representing the ideal solution for Global Power Cable and Transmission Line Monitoring.
Contact our sales department for more information.
Download: Cable-monitoring-en.pdf
Download: MV Cables Brochure - eng.pdf
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