The ceramic vacuum switch tube series are made by adopting the advanced method and strict technology with High-temperature resistance, corrosion resistance, high mechanical strength, strong thermal-shock resistance, good insulating strength, high electrical resistitivy, low dielectric loss, good gas tightness etc. characteristic. They can be widely used for the high-tension power transmission and transformation and various high-tension and middle-tension distribution equipment. At the same time, they are the substitution of traditional ironclad switch and oil-immersed type switch. In addition, we can manufacture the products as the customers requirement.