Lubricant for gas insulated switchgear, and gas insulated switchgear
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 mm 2 /s or more; and a thickener containing bisamides.
1. A lubricant for a gas insulated switchgear, comprising:
a base oil containing a polyalphaolefin having a kinematic viscosity at 40° C. of 50 mm 2 /s or more; and a thickener containing methylene stearyl bisamide, wherein the lubricant has chemical stability in the presence of a decomposition product of SF 6 gas.
2. The lubricant for a gas insulated switchgear, according to claim 1 , wherein at least one kind of a conductivity imparting agent and a lubricity imparting agent is contained.
3. The lubricant for a gas insulated switchgear, according to claim 2 , wherein the conductivity imparting agent is graphite powder, and the lubricity imparting agent is molybdenum disulfide.
4. A gas insulated switchgear, comprising:
a gas circuit breaker;
a disconnector;
an installation switch;
a current transformer; and
a main bus,
wherein the gas circuit breaker, the disconnector, the installation switch, and the current transformer have sliding parts, and
the lubricant for a gas insulated switchgear according to claim 1 is applied to the sliding parts.