Vakuumschalter und Verfahren zur Herstellung desselben

摘要

A method for manufacturing a vacuum interrupter including, a vacuum enclosure composed of an insulating tube (11) sealed by metal flanges (12,13), a pair of electrodes (14,15) in the vacuum enclosure which are able to make and break contact, and a pair of conducting shafts (16,17). The method includes the steps of preparing a fixed-side assembly (31) composed of a fixed electrode, a fixed-side conducting shaft and a fixed-side flange jointed as one unit, preparing a movable-side subassembly (32) composed of a movable electrode, a movable-side conducting shaft and a movable-side flange jointed as one unit, preparing an insulating tube subassembly (33) composed of the insulating tube, preparing an assembly such that the movable-side, insulating tube, and fixed-side subassemblies are superimposed with first solders for gas-tight sealing being inserted between the movable-side and fixed-side subassemblies and end surfaces of the insulating tube subassembly and with a second solder for contact soldering being inserted between the contact and the electrode, and heating and evacuating the assembly in a vacuum furnace to evacuate inside the vacuum enclosure and to solder by the first solders and the second solder, thereby to obtain the vacuum interrupter. Whereby gas-tight soldering and soldering of the contact and the electrode are carried out simultaneously in the heating and evacuating step.