The invention relates to an
alternating current high-
voltage vacuum
circuit breaker, which is characterized in that the invention comprises a case body, a
vacuum arc extinguish chamber is seated and connected to the case body, an electromagnetic repulsive force mechanism is disposed in the case body, the mechanism comprises an open coil and a close coil which form a fixed gap, a repulsion disk arranged in the gap, a repulsion rod which is fixedly penetrated by the equipped repulsion disk, a
retention capacity rod of a composite disc spring retention
force structure connected with the lower end of the repulsion rod, a catch spring fixed on the retention force rod and at least two pieces of disc springs top-arranged on the catch spring. The upper end of the electromagnetic repulsive force is connected with a closing buffer gear which comprises a spring frame structure and a
hydraulic cylinder, further, the closing buffer gear comprises an intelligent
pulse generator. Because the invention employs the electromagnetic repulsive force mechanism, employs bi-stable composite disc springs to retain, employs the closing
hydraulic pressure buffer gear to inhibit closing bouncing, and employs a
photoelectric sensor to realize position returning, thereby belonging to the advanced design at home and abroad, therefore, the invention can be widely applied to the field of fault current limiters,
phase selection switches,
solid change-over switches and the like.