Mitsubishi Denki Kabushiki Kaisha

Nobuo Nagai

Shoji Tada

Tugio Watanabe

A lightning arrester comprises a non-linear resistor as a lightning arrester element and an insulator holding the non-linear resistor in one body without a gap to prevent deterioration of the non-linear resistor caused by moisture.

Lightning arrester

Lightning arresters comprising each non-linear resistor made of a main component of zinc oxide and the other minor component are connected between a steel tower and a power transmission cable supported on the steel tower by an insulator and between the power transmission cables in different phases whereby the lightning resistance of the aerial power transmission system is improved.

Lightning resistive device in aerial power transmission system

A lightning arrester device comprises a serial connection of a non-linear resistor and a linear resistor as a lightning arrester and a pair of electrodes disposed at both ends of the lightning arrester with a spark gap being defined between the electrodes thereby preventing a damage of the lightning arrester caused by direct lightning to a power transmission line.

Lightning arrester device for power transmission line

A grounded cylindrical metallic housing is hermetically closed at one end and an electric insulation hermetically extends through the other closed end of the housing to form in the housing a space filled with an electrically insulating gas. An arrester element disposed in the space has the incoming-line side connected to a terminal extended and sealed through the insulation and the ground side electrically connected to the housing. The incoming-line side of the arrester element is surrounded by both the insulation and a shield ring embedded therein.

Growing community of inventors

Amagasaki, Japan

Nobuo Nagai