Effectiveness of installing two pairs of distribution surge arresters in parallel

Lightning strokes with a large amount of energy sometimes occur on the Sea of Japan coast in winter. Winter lightning often damages overhead power distribution lines, in particular, those supplying power to high structures located in mountainous areas. The authors have investigated that the ratio of surge arrester outages with respect to all damaged installations on such power distribution lines is largest at approximately 50%. They have examined the effectiveness of installing two pairs of surge arresters in parallel on a single pole as a method for preventing distribution surge arrester outages experimentally. They have clarified that to install surge arresters in parallel is effective in reducing the energy absorbed by surge arresters if these surge arresters have the almost same discharge voltage and voltage-current characteristics