“…1 (Naidu & Kamaraju, 1995;Pai & Zhang, 1995). The various mechanisms are intrinsic breakdown (Callen, 1949;Hippel & Alger, 1949;O'Dwyer, 1964;Seeger & Teller, 1939;Seitz, 1948;Whitehead, 1951), electromechanical breakdown (Laghari & Sarjeant, 1992;Stark & Garton, 1955), breakdown due to treeing and tracking, thermal breakdown, electrochemical breakdown (Sawa, 1986). …”