Lubricant for gas insulated switchgear, and gas insulated switchgear
AssigneeHitachi, Ltd.
InventorsTakayuki Nakakawaji, Hiroyuki Akata, Tomohiro Moriyama, Kazuhiro Satou, Makoto Hirose
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Abstract
Provided is a lubricant for a gas insulated switchgear, with which properties of a base oil such as heat resistance, evaporation loss, fluidity under a low temperature, and chemical stability (oxidation resistance and HF resistance) are balanced at a level higher than the conventional level, and long service life and high reliability of the gas insulated switchgear are achieved. A lubricant for a gas insulated switchgear according to the present invention, contains: a base oil containing a polyalphaolefin having a kinematic viscosity at 40° C. of 50 mm2/s or more; and a thickener containing bisamides.
Claims4
A lubricant for a gas insulated switchgear, comprising:
- a base oil containing a polyalphaolefin having a kinematic viscosity at 40° C. of 50 mm2/s or more;
- and a thickener containing methylene stearyl bisamide, wherein the lubricant has chemical stability in the presence of a decomposition product of SF6 gas.
Dependencies are inferred from the claim text.