Electric Circuit Breaker

Abstract

The present invention provides an electric circuit breaker that quickly breaks current in a wide current range up to a relatively low current as well as a relatively high current. An electric circuit breaker 600 that includes a housing 300, a cut portion 400 that is disposed in the housing 300 and constitutes a part of an electric circuit, a first power source P that is disposed on a side of a first end portion 320 of the housing 300, and a moving body 500 that moves in the housing 300 between the first end portion 320 and a second end portion 330 opposite to the first end portion 320, the electric circuit breaker including a fuse function portion 700 that includes a fusion portion 740 and an arc-extinguishing material 730, wherein the moving body 500 is configured to cut a cut piece 420 positioned between base pieces 430 on both sides of the cut portion 400 at a part of the moving body 500 while moving from the first end portion 320 toward the second end portion 330 by the first power source P, in a case where a current to be broken is low, the fuse function portion 700 and the cut portion 400 are not connected, the moving body 500 is moved toward the second end portion 330 by the first power source P to cut the cut piece 420 positioned between the base pieces 430 on both sides of the cut portion 400 to break a state where the base pieces 430 on both sides of the cut portion 400 are energized, and in a case where the current to be broken is high, the fuse function portion 700 and the cut portion 400 are connected to each other, the moving body 500 is moved toward the second end portion 330 by the first power source P to cut the cut piece 420 positioned between the base pieces 430 on both sides of the cut portion 400 to break the state where the base pieces 430 on both sides of the cut portion 400 are energized.

Dependencies are inferred from the claim text.