Method for producing electrode material for vacuum circuit breaker, electrode material for vacuum circuit breaker and electrode for vacuum circuit breaker

Abstract

Provided are a method for producing an electrode material for a vacuum circuit breaker, whereby withstand voltage, high current interruption performance and capacitor switching performance can be improved; an electrode material for a vacuum circuit breaker; and an electrode for a vacuum circuit breaker. A contact material for an electrode for a vacuum circuit breaker has an integral structure consisting of a central member and a Cu—Cr outer peripheral member, the central member having been produced as described above and comprising 30 to 50 wt % of Cu of a particle diameter of 20 to 150 μm and 50 to 70 wt % of Mo—Cr of a particle diameter of 1 to 5 μm, while the outer peripheral member being formed of a material, which is highly compatible with the central member, shows excellent interruption performance and had high withstand voltage, and being provided outside the central member and fixed thereto.