用于低压交流回路的断 路器，由于在过零换向电压不能满足再次阴极放电起弧的需要，因此具有容易灭 弧的优点。

In breakers for operation in low-voltage ac circuits, advantage is taken of the voltage required to establish a cathode spot.

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主导电回路真空灭弧室和动静导电联接安装在绝缘筒内，使相间距仅为300 mm。

Main galvanic circle vacuum explosion chamber and dynamic and static conduction connection is installed into the insulating cylinder, making phase to phase only 300mm.

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