摘要 |
<p><P>PROBLEM TO BE SOLVED: To easily detect gas leakage from a sealed vessel by using a gas detector in a sealed gas-insulated switchgear in which dry air as insulation gas is pressure-filled into the sealed vessel that accommodates switching apparatuses. <P>SOLUTION: The sealed gas-insulated switchgear insulates phases, isolating poles, and the switchgear and the ground by pressure-filling the insulation gas into the sealed vessel 2 containing the apparatuses such as bus bars constituting the switchgear, a disconnector and a blocker. In the sealed gas-insulated switchgear using air dry as the insulation gas, a helium gas of which the gas leakage can be detected by a gas detector is pressure-filled into the sealed vessel 2 together with the dry air, and the gas leakage occurs in the sealed vessel by some accident, a probe 10a of a helium detector 10 is made close to a sealed point of sealed points 2a of the sealed vessel, and the point of the gas leakage is specified by checking the existence of the helium gas that leaks accompanied by the insulation gas. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |