Abstract :
The paper gives an account of an investigation into the magnitude of lightning voltages and currents measured on power transmission lines. The research was undertaken primarily in South Africa, on a 40-kV power line of the Victoria Falls and Transvaal Power Co. Later the work was continued in Nigeria on a 33-kV line of the Nigerian Electricity Supply Corporation´s system. The apparatus used in the investigation comprised (a) a high-speed continuously-evacuated cathode-ray oscillograph, (b) a klydonograph, and (c) magnetic links for current measurement. The results obtained are analysed and compared with similar measurements made in other parts of the world.
