The VIS (ZW32-12) 12kV Pole-mounted Vacuum Circuit Breaker, an outdoor distribution apparatus, operates on a three-phase AC system at 50Hz/60Hz and is rated for 12kV. It primarily functions in 12kV power systems, managing load current, overload current, and short-circuit fault current. This device ensures consistent scheduling and secure operation of the power system. It is apt for industrial and mining enterprise distribution systems and control applications, and is especially suitable for rural power grids with frequent operations. This device can also serve as a sectionalizing switch in the power grid. With different controllers, it can function as a recloser or an automatic switch for distribution networks, thereby facilitating distribution automation and substantially enhancing power supply quality.