Vacuum circuit breaker and electric contact

High-voltage switches with arc preventing or extinguishing devic – Arc preventing or extinguishing devices – Vacuum

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218129, 218132, H01H 3366, H01H 100

Patent

active

055570836

ABSTRACT:
According to the present invention there are provided a highly reliable electrode of high strength which undergoes little change even with the lapse of time, and a method for making the same, as well as a vacuum valve using such electrode and a vacuum circuit breaker using such vacuum valve. The vacuum circuit breaker has a fixed electrode and a movable electrode, each comprising an arc electrode, an arc electrode support member for supporting the arc electrode, and a coil electrode contiguous to the arc electrode support member, the arc electrode, the arc electrode support member and the coil electrode being formed as an integral structure by melting, not by bonding, particularly the arc electrode support member and the coil electrode being constituted by a Cu alloy containing 0.05-2.5% by weight of at least one of Cr, Ag, W, V and Zr.

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patent: 3818163 (1974-06-01), Robinson
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patent: 4588879 (1986-05-01), Noda et al.
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patent: 4870231 (1989-09-01), Naya et al.
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IEEE Standard Dictionary of Electrical and Electronic Terms; IEEE Std 100-1972; pp. 629, 630, First Edition.
IEEE Standard Dictionary of Electrical and Electronics Terms; IEEE Std 100-1977, p. 760, Second Edition.

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