Lightning currents in 132-kv lines

Data pertaining to lightning currents actually measured in tower structures, counterpoises, and ground wires on 132-kv lines during 1933–36 are presented in this paper. It is concluded that stroke currents rarely exceed 150,000 amperes, although 220,000 amperes has been indicated, and that currents as high as 60,000 amperes measured in the overhead ground wires indicate the necessity of adequate shielding of the line at station entrances.