Patent ID: 6303076
Filing Date: 2001-10-16
Classification: H01H

Abstract:
A contact material for contacts for a vacuum interrupter, said material comprising:(a) 50 to 70% by weight of a conductive material containing Cu as a principal component;(b) 30 to 50% by weight of at least either TiC or VC having a mean particle diameter of 8 .mu.m or below and serving as an arc-proof component; and(c)(i) 0.2 to 2.0% by weight of Cr relative to the sum of the respective amounts of Cr and Cu; or(ii) 0.2 to 2.0% by weight of Zr relative to the sum of the respective amounts of Zr and Cu;wherein the contact material has a hydrogen content in the range of 0.2 to 50 ppm.