Round-robin artificial contamination test on high voltage DC insulators

This paper summarizes the results of a worldwide round-robin test of high voltage DC (HVDC) insulators, which was carried out in six laboratories aiming at standardization of the method for artificial contamination tests on HVDC insulators. Flashover characteristics of three kinds, of specimens mere evaluated by the clean fog and the salt fog procedures. Sufficient information is now available to allow the preparation of provisional international specifications for artificial contamination testing of HVDC insulators.>