Contact material for vacuum circuit interrupter

Details Contact material for vacuum circuit interrupter Contact material for vacuum circuit interrupter

1984-04-12

1985-09-10

Macon, Robert S.

Electricity: circuit makers and breakers

Liquid contact

Time delay

200262, 200265, 200266, H01H 3366

Patent

active

045408610

ABSTRACT:
A contact material for use in a vacuum circuit interrupter which simultaneously provides superior current interrupting performance and breakdown voltage. The contact material of the invention includes components of copper, tantalum and at least one of cobalt and iron. Cobalt or iron should be present in an amount of 50 wt % or less, while the combination of tantalum and cobalt or iron should be present in an amount of at least 10 wt %. A fourth component of at least one of titanium, zirconium and aluminum may be added. Also, there may be included a fifth component containing at least one of a low melting point metal, alloys of a low melting point metal, intermetallic compounds of a low melting point metal, and oxides thereof, with the low melting point metal being at least one of bismuth, tellurium, antimony, thallium, lead, selenium, cerium and calcium in an amount of not more than 20 wt %.

REFERENCES:
patent: 3592987 (1971-07-01), Lempert et al.
patent: 3612795 (1971-11-01), Emmerich
patent: 4323590 (1982-04-01), Lipperts

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