| 摘要 |
PROBLEM TO BE SOLVED: To conduct an easy operation of mounting a master bar at a low cost. SOLUTION: Ungrounded-side power source seat 4 of a branch breaker 1 is a plate body, that swings freely by pivoting axial support 5 at the base side with a pin 6, projects to the front side of a housing 2 in a length capable of screwing to a principal bar 11, and has a through-hole 7 for screwing at the top. A spring seat 8 is formed facing downward above an ungrounded-side power source seat 4 in the housing 2, a coil spring 9 is inserted between a spring seat 8 and the power source seat 4, and the said seat 4 has been driven to the lower limit position in contact with a stopper 10 in the housing 2 by the driving of the coil spring 9. |
