| 摘要 |
PURPOSE: An auxiliary switch apparatus of a vacuum circuit breaker is provided to prevent the error operation of the auxiliary switch even if the vacuum circuit breaker is used at the place where the vibration like an earthquake is strong. CONSTITUTION: A vacuum circuit breaker comprises a main circuit unit for switching a circuit between the power source and a load, and a truck unit(2) for supplying the power to switch the main circuit unit. An auxiliary switch apparatus of a vacuum circuit breaker comprises a change lever for transferring the power from the truck unit to the main circuit, a vertical link connected to the change lever and moving vertically according to the rotation of the change lever, a rotation cam(103), a rotating lever, an auxiliary switch(110) including an operating shaft and switching the rotation of the operating shaft, and a rotating force transferring unit connected between the rotating lever and the auxiliary switch and transferring the rotation force of the rotating lever to the auxiliary switch.
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