Electrical Circuit Breaker Device

Abstract

Provided is an electrical circuit breaker device having quick breaking capability not only to relatively high currents but also to relatively low currents. The electrical circuit breaker device includes: a to-be-cut portion (400) that is arranged in a housing (301) and constitutes a part of an electrical circuit; and a moving body that moves in the housing (301) between a first end portion (320) and a second end portion (330) on an opposite side of the first end portion (320) by a power source P, in which the electrical circuit breaker device includes a fuse functional circuit portion (800) that is connected to the to-be-cut portion (400) and has a fusion portion (740) and an arc-extinguishing material Q, the moving body includes: a first moving body (500) that moves by the power source P; and a second moving body (600) that moves by power of the first moving body (500), the first moving body (500) moves from the first end portion (320) toward the second end portion (330) and cuts off a cutting piece (420) of the to-be-cut portion (400), and the second moving body (600) cuts off a part of the fuse functional circuit portion (800) after the first moving body (500) cuts off the cutting piece (420).

Dependencies are inferred from the claim text.