Contact material for a vacuum circuit breaker and a method for m

Details Contact material for a vacuum circuit breaker and a method for m Contact material for a vacuum circuit breaker and a method for m

1996-08-23

1998-12-29

Walczak, David J.

Electricity: circuit makers and breakers

Electric switch details

Contact

200265, 200270, 420495, 428567, H01H 102

Patent

active

058530835

ABSTRACT:
Interrupting and chopping characteristics of a Cu--Cr contact alloy are improved by rounding Cr particles to be spherical in the alloy. The Cr particles are rounded in the alloy by sintering raw Cr powder particles having an average particle diameter of less than 100 .mu.m at a temperature of 1,100.degree. C. or higher with Cu powder, or by sintering raw Cr powder particles having an average particle diameter of 100 to 150 .mu.m at a temperature of 1,200.degree. C. or higher with Cu powder.

REFERENCES:
patent: 4372783 (1983-02-01), Kato
patent: 4923509 (1990-05-01), Kemp, Jr. et al.
patent: 4943322 (1990-07-01), Kemp, Jr. et al.
patent: 5246512 (1993-09-01), Seki et al.

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