ADSORBING MEANS

PROBLEM TO BE SOLVED: To realize adsorption of a decomposed gas and reduction of a water content by a less amount of an adsorbent by raising an adsorbing efficiency of the water content by a method wherein the adsorbent and a pectin are contained in a case having a vent. SOLUTION: In a gas insulated switchgear wherein it is composed of a plurality of hermetically sealed containers and a case 11 in which an adsorbent 12 is enclosed is provided in each container, an adsorbing means to be used is constituted wherein the case 11 is attached under a lid 2, and an adsorbent 12 such as synthetic zeolite, activated alumina and a small case 13 containing pectin powder or pectin substance are contained in the case 11. In the case 11, a vent is formed so as to communicated with an inside of a tank, and the small case 13 is formed from a macromolecular material for passing through a water molecule while allowing the pectin powder not to go out therefrom. Further, a fan for forcing an air to be sent into the case 11 is attached to the case 11, and the fan is constituted so as to be functioned by an electric power generated with a solar battery.