00340nam a22000857a 4500100003100000245014600031260002700177300000800204700004200212  aIshfaque Ali Memona15EL33  aTechnical study of partial discharge patterns testing commission  and causes of dielectric breakdown in HV and EHV gas insulated switch gear   aNawabshahbQUESTc2019  a100  aDepartment of Electrical Engineering