Novel pole-mounted vacuum circuit breaker

The utility model discloses a novel pole-mounted vacuum circuit breaker comprising a housing, the top of the housing is sequentially provided with three uniformly spaced poles from left to right, the top of each pole is hinged with an isolation blade, the top of a first mounting rack is provided with insulators corresponding to the three poles, the top of each insulator is provided with an upper wiring terminal, the first mounting rack is provided with a first rotating shaft, and the first rotating shaft is provided with a second rotating shaft. The outer side faces of the three current transformers are all provided with lower wiring terminals, the second installation frame is provided with a second rotating shaft, and the positions, corresponding to the current transformers, of the second rotating shaft are all provided with grounding blades. And the other end of the grounding blade is movably arranged on the lower wiring terminal. The grounding device has a grounding function in use, so that the workload ca