VACUUM CIRCUIT BREAKER, AND VACUUM VALVE AND ELECTRIC CONTACT USED FOR THE VACUUM CIRCUIT BREAKER

摘要

PROBLEM TO BE SOLVED: To provide an electrode with a high strength, a small secular change, and a high reliability, a method of manufacturing the electrode, a vacuum valve using the electrode, and a vacuum circuit breaker using the vacuum valve.;SOLUTION: This vacuum circuit breaker comprises a fixed side electrode having an arc electrode, an arc electrode support member supporting the arc electrode, and a coil electrode arranged continuously with the support member and a movable side electrode. The arc electrode, arc electrode support part, and coil electrode are formed of non-connection parts and formed integrally with each other by welding. In particular, the arc electrode support part and coiled electrode are formed with a Cu alloy containing at least one of Cr, Ag, W, V and Zr of 0.05 to 2.5 w.%.;COPYRIGHT: (C)2002,JPO