Direct current load breaking contact point apparatus and...

Details Direct current load breaking contact point apparatus and... Direct current load breaking contact point apparatus and...

H - Electricity

01

H

H01H 1/02 (2006.01) C22C 5/06 (2006.01) C22C 32/00 (2006.01) H01H 1/0237 (2006.01) H01H 1/04 (2006.01)

Patent

CA 2421476

The invention intends to provide a direct current load breaking contact point constitution that can make and break an electrical circuit under both direct current loads of direct current resistance load and direct current inductance load over a long period of time. The direct current load breaking contact point constitution according to the invention comprises a movable contact point and a stationary contact point that face each other; wherein the movable contact point is made of AgSnO2In2O3 alloy that contains at least Ag, 8 to 15% by weight in total of metal oxides including SnO2 and In2O3, 6 to 10% by weight of SnO2 and 1 to 5% by weight of In2O3; the stationary contact point is made of AgZnO alloy that contains at least Ag and 7 to 11% by weight of ZnO; and polarity of a movable side is (+) and that of a stationary side is (-).

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