There exists some problems in using the common alternating current contactor. It improves after having used the vacuumcontactor.
普通交流接触器在使用中存在一定的问题，改用真空交流接触器效果良好。
2
The utility model relates to a vacuumcontactor-fuse combined electric appliance, particularly a hand trolley type horizontal pulling and isolating switch device.
本实用新型一种真空接触器-熔断器组合电器，涉及手车型水平拉引隔离的开关装 置。
3
This article discusses the necessity of air leakage detection to check the vacuum of the vacuumcontactor in operation, and the mechanism of air leakage detection theoretically.