Vacuum switch and vacuum switchgear

Abstract

The present invention relates to a vacuum switch and a vacuum switchgear. The object of the invention is to provides a vacuum switch covered by solid insulation resin with high insulation performance. The vacuum switch comprises a fixed electrode, a movable electrode facing the fixed electrode, an insulating cylinder, end plates covering both axial ends of the insulating cylinder, a vacuum chamber internally accommodating the fixed electrode and the movable electrode, and a solid isolation resin molded on the outside of the vacuum chamber, characterized in that, a first coil springs, each of which is disposed around the outer circumference of one end plate while touching the end plate and an end face of the insulating cylinder, and a second coil springs, each of which is united to one of the first springs and disposed around the outer circumference of the insulating cylinder so as to cover the angular part of the end face of the insulating cylinder, and the end plates, the end faces of the insulating cylinder, and the first and second coil springs are electrically connected.

Description

technical field [0001] The present invention relates to a vacuum switch and a vacuum switchgear, and more particularly, to a vacuum switch and a vacuum insulated switchgear suitable for insulatingly molding the periphery of a vacuum container accommodating a switch portion. Background technique [0002] A vacuum switch is a switch with high insulation performance utilizing a vacuum, and can be miniaturized and gas-free. [0003] In a vacuum switch, there is not only a vacuum insulation, but also a structure in which the insulation performance is enhanced by covering the periphery of the switch vessel with a solid insulating resin to form a double insulation structure. [0004] However, when the periphery of the switch vessel of the vacuum switch is covered with a solid insulating resin, an electric field is concentrated at the end of the insulating cylinder constituting the switch vessel, and dielectric breakdown is likely to occur. [0005] Then, there is a structure descr...

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Problems solved by technology

[0007] However, in the structure disclosed in Patent Document 1, although a ring-shaped electric field relaxation shield is arranged at the end of the insulating cylinder, since the two ends of a helical spring are connected in a ring shape, it cannot cover the insulating cylinder where the electric field is most concentrated. At the corner of the end, there is a problem that the electric field concentrates on the corner of the end of the insulating cylinder, which may cause insulation damage

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