Progress and experience on type and field testing procedures of SF6 gas insulated substations

The paper, reports the experience of CESI in the type and field testing of gas insulated substations. For laboratory testing, the paper limits itself to the dielectric and switching performance of switching devices ranging from 145 to 800 kV. Full pole and unit testing together with direct and synthetic testing methods are presented. For field testing, experience in the application of different diagnostic methods during onsite tests and in-service is described.