WVS-12 Solid-closure indoor high-voltage vacuum circuit breaker is the new product that our company launched,which have domestic leading level,it is on the basis of the introduction of foreign advanced technology for the optimization design of new products.Its operating mechanism optimization design using special spring operating mechanism,a conductive circuit is made of solid insulation structure,so as to improve the product's ability to resist pollution,flood.The product special series respectively through the test,at an altitude of 4500 m plateau -25 C low temperature test,cutting capacity test,it is able to meet the specific requirements of the users in different areas.