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Condition assessment on MV & HV cables

Condition assessment provides knowledge about the state of the various components in HV grids. This knowledge contributes to the right decisions regarding maintenance and replacement. Condition based-maintenance improves the overall performance at a lower cost


Partial discharge (PD) is regarded as the best early warning indicator of insulation degredation in MV & HV assets.

The PD survey reveals and locates faults without service interruption. This is a complex PD survey which captures the PD pattern with it`s waveform and the frequency spectrum of every PD pulse that the fault generates. This provides the complete information regarding the activity so that appropriate measures can be taken


The survey is suitable for any electrical equipment from 3kV to 600kV. The meausurments will also pick up PD signals from faluts at a distance. This means that we can detect faults in cable/joints far from the measurement point. How far depends on the attenuation and propagation in the cab​​​


A PD survey will:

• Reveal insulation weaknesses in MV & HV systems

• Increase reliability in MV & HV assets

• Increase asset longevity

• Increase safety

• Reduce Risk
• Reduce maintenance costs moving from preventive to condition based-maintenance

Remote PD survey

NEKA can also conduct a PD survey over 4G. All you need to do onsite is to temporarily attach the PD sensors to the relevant high voltage cables. The actual measurements and analysis are performed by our test engineer. This avoids extra costs such as downtime, travel time, travel costs and extra costs for offshore work.

The PD measurements take about 5 to 15 minutes per cable set (3 phases) depending on the complexity of the measurements. The result will be the same as if the test engineer were on site.



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