ELECTRICAL BREAKDOWN PROPERTIES IN LIQUID-GAS COMPOSITE N-2

Electrical breakdown characteristics of composite insulators consistin g of cryogenic gas and liquid in a nonuniform field have been investig ated. The breakdown voltage increases slightly as the electrode distan ce of gas layer, d', increases. After the breakdown voltage decreases abruptly with increasing d', it again increases slightly with further increase of d'. These results observed at both AC and DC voltages were interpreted as the Sumoto effect and corona wind.