Koichi Nakamura’s research while affiliated with Nagoya Institute of Technology and other places

In measurements of rocket-triggered lightning current and voltage performed between 1986 and 1995 on the mountain top of Okushishiku in the Kanazawa area, the authors succeeded in artificially inducing winter lightning to arresters. Using the data obtained from those measurements, we analyzed the energy absorption characteristics of surge arresters, such as are installed on every transmission line tower for three phrases, by EMTP. The energy withstand capability of an individual arrester was verified to be approximately the same as the expected value. The analysis results for the energy share of each arrester connected in parallel showed that the usual light duty arresters installed on every tower have the possibility to be able to absorb extreme winter lightning energy even if the lightning hits the power line directly. © 1998 Scripta Technica. Electr Eng Jpn, 122(4): 25–33, 1998

In the measurement of the rocket-triggered lightning currentt and voltage, executed from 1986 to 1995 at mountain top of Okushishiku in Kanazawa areas, the authors succeeded in artificially inducing the winter lightning to the arresters, Using the data obtained in those measurments, we analyzed the energy absorption characteristics of surge arresters, which are installed on every tower of transmission line for three phases, by EMTP. The energy withstand capability of individual arrester was verified as approximately same as expected value. Analysis result for energy share of each arrester connected in parallel showed that usual light duty arresters installed on every tower have possibility to be able to absorb the big winter lightning energy even if the lightning bit directly the power line.