| 摘要 |
PROBLEM TO BE SOLVED: To improve the positioning accuracy of a contact point of a double-break circuit breaker, and to suppress generation of friction at a bearing part of a rotor, and to provide a highly-reliable circuit breaker.SOLUTION: A double-break circuit breaker in which, when such current that a circuit should be blocked flows, a rotor 13 rotates, and a power supply side contact and a load side contact are operated to be closed by the rotation of the rotor, comprises: a first unit case 52L supporting one shaft part 13L of the rotor by a recessed cylinder part 52LCG; and a second unit case 52R supporting the other shaft part 13R of the rotor by a recessed cylinder part 52RCG. The recessed cylinder part of the first unit case and the recessed cylinder part of the second unit case are arranged at such a position that a center O of the recessed cylinder part of the first unit case and a center O' of the recessed cylinder part of the second unit case become coaxial. |
