把任一个控制手柄拨到工作位置上，再按“起动”按钮，总接触器应不动作，则说明零位保护已发挥作用。
Put any control handle to the working position, press the "start" button, the total contactor should not move, then explain the zero position protection has played a role.
把任一个控制手柄拨到工作位置上，再按“起动”按钮，总接触器应不动作，则说明零位保护已发挥作用。
Put any control handle to the working position, press the "start" button, the total contactor should not move, then explain the zero position protection has played a role.
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