A Study on Dynamic Voltage Distribution on Contaminated Insulator Surface

Dynamic voltage distribution on an insulator unit was investigated before and during scintillation activity. A simple method for the measurements of voltage distribution was successfully developed. It was observed that some parts of the leakage distance do not function during scintillations, and therefore the concept of "effective leakage distance" was introduced. A good correlationship between " effective leakage distance" and flashover voltage was found.