JP2007080594A5 - - Google Patents

Claims (6)

And the metal casing of the floating potential, and fixed to said metal container, and arranged a vacuum vessel consisting of two insulating bushings which are disposed, detachably electrode pair two pairs provided in the vacuum vessel, the metal comprising a measuring terminal for vacuum pressure diagnosis is arranged in the container and the counter, the insulator for molding the measuring terminal and the metal container, and a ground layer provided on an outer peripheral portion of the insulating material, and該接strata the measuring terminal vacuum switchgear comprising electrically insulated. A metal container having a floating potential, a vacuum container made of an insulating bushing fixed in the metal container , two pairs of contactable / detachable electrode pairs provided in the vacuum container, and a vacuum container different from the vacuum container A vacuum ground switchgear provided with at least a pair of electrodes that can be contacted and separated in the other vacuum vessel, a measurement terminal for vacuum pressure diagnosis arranged opposite to the metal vessel, the measurement terminal , and the metal A vacuum switchgear comprising: an insulator for integrally molding a container and the vacuum installation switchgear; and a grounding layer provided on an outer periphery of the insulator, wherein the grounding layer and the measurement terminal are electrically insulated . In a vacuum switchgear comprising a metal container having a floating potential, a vacuum container comprising an insulating bushing fixed to the metal container, and at least one pair of electrodes that can be contacted and separated in the vacuum container, the metal container is an insulator. In addition, a grounding layer is provided on the outer periphery of the insulator except for a part of the area, and a measurement terminal for vacuum pressure diagnosis is arranged to face a part of the outer periphery of the insulator. A vacuum switchgear characterized by comprising: The vacuum switchgear according to any one of claims 1 to 3, further comprising a diagnostic device that measures or constantly monitors the AC voltage of the system wave number generated at the measurement terminal, and the diagnostic device has a voltage increase that exceeds a certain threshold value. A vacuum switchgear characterized by determining a vacuum failure when it occurs. The vacuum switchgear according to any one of claims 1 to 4, wherein a conductive coating is applied to an outer periphery of the insulator, and the grounding layer is formed by grounding the conductive coating. . 5. The vacuum switching device according to claim 4, wherein the diagnostic device measures a voltage generated at the measurement terminal when an operation command is not given to the vacuum switching device, and a voltage increase exceeding a certain threshold occurs. A vacuum switchgear characterized in that a vacuum failure is determined.