Vacuum circuit interrupter

Details Vacuum circuit interrupter Vacuum circuit interrupter

1981-05-22

1983-10-18

Macon, Robert S.

Electricity: circuit makers and breakers

Liquid contact

Time delay

H01H 3366

Patent

active

044107773

ABSTRACT:
A vacuum interrupter has a bell-shaped metal casing made of copper or stainless steel with a copper, ring-shaped stress reduction member sandwiched between an open end of the casing and the outer periphery of a ceramic insulation disk. Since copper is plastically deformable, thermal stress generated during cooling down to room temperature following brazing of the metal casing to the ceramic insulation disk is substantially reduced, resulting in increased brazing strength so that the wall thickness of the casing can be increased. Further, since copper and stainless steel are not ferromagnetic materials, it is possible to reduce eddy currents and magnetostrictive vibration in the casing.

REFERENCES:
patent: 3727018 (1973-04-01), Wesoloski et al.
patent: 3812314 (1974-05-01), Nonken

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