macro shot of transformer bushings having hv side output terminal

bolt bushings changer closeup coil component conductor connections construction cooled current disc distribution electric electrical electricity electromagnet engineering grid having high highvoltage induction industrial industry insulated insulation insulator insulators isolated macro magnetism manufacturing mutual nut oil output phase pin porcelain power primary radiators ryb shackle shell shot side strain substation supply suspension tank tap technology terminal three transformer transmission type voltage volts