Change of state contact material for electric circuit interrupte

Details Change of state contact material for electric circuit interrupte Change of state contact material for electric circuit interrupte

1985-08-08

1986-08-19

Marcus, Stephen

Electricity: circuit makers and breakers

Electric switch details

Contact

H01H 102

Patent

active

046071482

ABSTRACT:
A change of state circuit breaker contact material provides a low contact resistance at a low closing force by reducing current density through a pair of circuit breaker contacts. The use of a meltable metal alloy within the contact structure forces the current through a wider area of conduction whenever the temperature increases to melt correspondingly larger quantities of the metal alloy. The reduced contact hardness results in a substantial decrease in the force required to hold the contacts together, thereby allowing the contacts to open more quickly.

REFERENCES:
patent: 3663777 (1972-05-01), Steinmetz et al.
patent: 3889098 (1975-06-01), Steinmetz et al.
patent: 4088803 (1978-05-01), Kubo et al.
patent: 4378479 (1983-03-01), Hieronymus

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