| 摘要 |
This invention is concerned with the poly-phase circuit breaker which is switched to a full phase by the switching manipulation of commoned handle. The extension of neutral point can be reduced by separating the cross-bar operation independently and the operation of neutral point extended during the open circuit. The supporter (29) is attached to the cross-bar (9) through the fixing device (8) and the conductor (5) is connected to the Nphase peculiar arm (7') through a pin (5a). The condensing coil spring (30) is inserted to obtain the contact pressure between the arm (7') and the conductor (5).
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