The circuit breakers of tongling sanyuan special casting co., LTD are arranged in three dimensions, and the left and right sides of the contact system and the instantaneous over-current tripping device are installed on an insulation board. The upper part is equipped with an arc extinguishing system, and the operating mechanism can be mounted in front or right side, with "parting", "closing" and manual disconnecting buttons. The upper left part of the device is equipped with a shunt tripping device and the back part is equipped with an under-voltage tripping device connected with the tripping axle.

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