| 摘要 |
PROBLEM TO BE SOLVED: To provide a contact superior in current breaking characteristics by stabilizing reignition characteristics of a contact alloy, and provide a vacuum breaker mounted with the same. SOLUTION: The contact of the vacuum breaker is composed of arc-resistant components consisting of Cr particle group having an average particle diameter of 0.1 to 150μm, a conductive component consisting of a CuCr matrix in which Cr of 0.35 wt% or less is made contained in the Cu, and a CuCr-Cr-C series alloy containing an auxiliary composition consisting of C. The total amount of Cr in the alloy is made to be 15 to 80 wt%, the amount of C being at least 30 wt% of the total amount of C is made to exist in the CuCr matrix, the amount of C in the CuCr matrix is made to be 20 to 800 ppm, and as for C contained in the CuCr matrix, its particle diameter is made below 5μm, and the spacing between particles is made at least 0.01μm. By this, its reignition characteristics and its current breaking characteristics can be made compatible. COPYRIGHT: (C)2004,JPO
|
