High-current vacuum switch with reduced contact erosion

Details High-current vacuum switch with reduced contact erosion High-current vacuum switch with reduced contact erosion

1978-01-09

1978-12-05

Macon, Robert S.

Electricity: circuit makers and breakers

Liquid contact

Time delay

200262, 200267, H01H 3366

Patent

active

041287487

ABSTRACT:
In high-current vacuum switch devices wherein the arc must transfer from the contacts to auxiliary electrodes, excessive contact erosion can be avoided by making this transfer occur as quickly as possible. Rapid transfer is facilitated by fabricating the contacts of refractory metal and the auxiliary electrodes of a material that is easily vaporized, consistent with chopping and recovery requirements, such as copper or iron.

REFERENCES:
patent: 2897322 (1959-07-01), Reece
patent: 3082307 (1963-03-01), Greenwood et al.
patent: 3769538 (1973-10-01), Harris
patent: 3997748 (1976-12-01), Harris

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