Contact material for a vacuum interrupter

Details Contact material for a vacuum interrupter Contact material for a vacuum interrupter

1994-03-15

1995-05-30

Pellinen, A. D.

High-voltage switches with arc preventing or extinguishing devic

Arc preventing or extinguishing devices

Air-current blowout

200264, 200266, H01H 3300, H01H 102

Patent

active

054203848

ABSTRACT:
A contact material for a vacuum interrupter includes: (a) from 25 to 70% by volume of a highly conductive component selected from the group consisting of Ag, Cu and combinations thereof, and (b) from 30 to 75% by volume of an arc-proof component comprising a carbide of an element selected from the group consisting of Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W and combinations thereof, wherein the average grain size of the said arc-proof component is from 0.3 to 3 micrometers and the average grain distance of the arc-proof component is within the range of 0.1 to 1 micrometer. Contacts for a vacuum interrupter obtained from the contact material have improved wear resistance, large current interruption characteristic, wear resistance, and chopping characteristic, and low temperature rise characteristic.

REFERENCES:
patent: 2975256 (1961-03-01), Lee et al.
patent: 3246979 (1966-04-01), Lafferty et al.
patent: 3683138 (1972-08-01), Nabae et al.
patent: 3807965 (1974-04-01), Tazaki et al.
patent: 5045281 (1991-09-01), Okutomi

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