Hitachi Metals, Ltd.

Takayuki Tanaka

Yoshiaki Nakamura

Ryutaro Kikuchi

Hajime Nishi

Motoharu Kajiyama

Kentaro Segawa

A power transmission cable includes a conductor, an inner semiconductive layer around the conductor, an electrically insulating layer around the inner semiconductive layer, an outer semiconductive layer around the electrically insulating layer, a shielding layer around the outer semiconductive layer, a binder tape layer around the shielding layer, and a sheath layer around the binder tape layer. The power transmission cable having an outer diameter of not smaller than 30 mm and not greater than 60 mm. The sheath layer having a thickness of not smaller than 2 mm and not greater than 4 mm, and is made of a non-halogen flame-retardant resin composition including a total of not lower than 100 parts and not higher than 180 parts of metal hydrate and silica per 100 parts of a base polymer, by mass, including an ethylene-vinyl acetate copolymer with a vinyl acetate content of not lower than 50 wt. %.

Power transmission cable using non-halogen flame-retardant resin composition

A halogen-free extra-high-voltage cable for railway rolling stock includes a stranded conductor, an inner semi-conducting layer covering the stranded conductor, an outer semi-conducting layer provided on an outer periphery of the inner semi-conducting layer via an insulation layer, and a sheath layer on an outer periphery of the outer semi-conducting layer, the sheath layer containing 80 to 200 parts by weight of metal hydroxide and 0.5 to 10 parts by weight of cross-linking agent with respect to 100 parts by weight of olefin-based polymer containing ethylene-vinyl acetate copolymer as a main component, the ethylene-vinyl acetate copolymer having a vinyl acetate content of not less than 40 wt % and less than 50 wt % and a melt flow rate of not more than 2.5 g/10 min and a resin composition is cross-linked.

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Hitachi, Japan

Takayuki Tanaka