On-line PD Testing and Monitoring of Metal-clad AIS

Partial Discharges can occur at various points in air insulated switchgear. Sources of PD include voids, surface tracking and loose HV contacts, in addition to PD in bushings and instrument transformers. By PD testing and monitoring, the development of underlying defects can be detected and insulation condition assessed.



Air Insulated Switchgear


Test Equipment





Monitoring Systems






Test Services

  • Comprehensive range of test services for on-line and off-line condition assessment.
  • Reactivation services offered to ensure the safe energisation of inactive HV assets.






Contact us

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