如把当前的电力开关看作是热离子真空管技术的简单演变,那是非常错误的。就某些制造工艺看,上述两种装置都是把金属导体密封在真空的玻璃或陶瓷容器上,但在真空开关内需要移动部件,做到这一点,是使它取得成功的关键。典型的真空开关内装有一定载流量的固定触头和动触头。动触头附贴在金属波纹管 It is very wrong to think of the current power switch as a simple evolution of the thermionic vacuum tube technology. In some manufacturing processes, both of these devices seal the metal conductor to a vacuum glass or ceramic container, but moving the part inside the vacuum switch is critical to its success. A typical vacuum switch contains a fixed amount of current carrying contacts and moving contacts. Moving contact attached to the metal bellows