The 24kV Outdoor Vacuum Circuit Breakers are the critical equipments which are widely used in the 20kV voltage level distribution system. With the construction and transformation of the 20kV distribution network deepening and extending in China's electric power system, the theoretical study of the 24kV Outdoor Vacuum Circuit Breaker is speeding up. To improve the design and manufacturing standards, and to research and develop the domestic key equipment with the international advanced level of the 20kV distr...