High Voltage Testing of GIS: Application of Frequency Tuned Resonant Test Sets and Return of Experience from On-site Tests

This paper deals with the on-site testing of GIS at high test frequencies generated by frequency tuned resonant test sets. The application of test frequencies of up to 300 Hz (see IEC 62271-203) showed no dependency on the breakdown voltage of the GIS insulation system. The publication also describes modern frequency tuned resonant test sets which enable efficient on-site testing. The return of experience from on-site testing of a state-of-the-art 245 kV GIS population is summarized