Work of cleaning of insulator strings by using high voltage insulator cleaner & protector of disc insulator strings, support insulators, post insulators of various bays, insulator portion of 220kV & 400kV CT, CVT, CB Pole, ICT Bushings, Isolators etc. in the Switch yard at 400kV New Koyna S/Stn under EHV O&M Circle, Karad