Partial Discharge (PD) testing and monitoring for oil filled and dry type transformers
On-line PD Testing and Monitoring of Transformers
Partial Discharges can occur at various points in transformer insulation. In oil filled transformers, sources of PD include gas bubbles in oil, voids or gaps in paper or pressboard insulation, in addition to PD in bushings and tap-changers. In dry type transformers, sources of PD include voids in insulation and surface tracking. By PD testing and monitoring, the development of underlying defects can be detected and insulation condition assessed.
In-depth diagnostic spot testing on in-service assets using the HVPD Kronos® Spot Tester using portable or pre-installed sensors.