Vacuum circuit-breaker, electrode assembly for vacuum circuit-breaker, and manufacturing method thereof

摘要

For the electrode of a vacuum circuit-breaker, a part of a high-conductive metal member is infiltrated in voids of a porous high-melting metal member, and both metal members are integrally joined to each other. An arc electrode portion 13 is formed of a high-melting area in which the high-conductive metal is infiltrated in voids of the high-melting metal member. A coil electrode portion 14 is formed by hollowing the interior out of a high-conductive metal area, which is composed of only the high-conductive metal, and forming of slits (15...17) therein. A rod 18 is hard-brazed on the rear surface of the coil electrode portion 14. With this electrode, it is possible to reduce the number of parts and to omit the brazing portion between the arc electrode portion 13 and the coil electrode portion 14, thus lowering the electric resistance and the heat generated in operation.