Vacuum circuit interrupter contacts and shields

Details Vacuum circuit interrupter contacts and shields Vacuum circuit interrupter contacts and shields

1990-11-19

1992-06-09

Scott, J. R.

Electricity: circuit makers and breakers

Liquid contact

Time delay

H01H 3366

Patent

active

051209187

ABSTRACT:
Copper-chromium contacts and copper-ferrous material shields are used in vacuum circuit interrupters. The copper chromium contacts include a specific copper-iron non-abutting section, and an abutting layer preferably of copper-chromium with a layer thickness that constitutes about 50% of the total thickness of the contact which constitutes the abutting section of the contact structure. The shield for the contacts, are preferably formed of copper-ferrous material and "X" in which 1%-50% is ferrous material, and "X"=chromium 0% to 30% and ferrous material plus "X" is less than 60% of the total shield. The contacts and shields are formed by a powder metallurgical procedure.

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