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真空接触器是60年代发展起来的新型接触器,由于它具有体积小、容量大、分断能力强、无电弧外露、寿命长、安全可靠等优点,所以原煤炭部要求各矿务局在40kW以上的电机上推广使用。由于真空开关在性能上优于空气式开关,所以近年来在40kW以下的许多机电设备上也得到广泛使用,如侧卸装岩机的电控部分由于工况恶劣,可逆运行以往用空气式接触器故障多,寿命短,平均
The vacuum contactor is a new type of contactor developed in the 1960s. Because of its advantages of small size, large capacity, strong breaking capacity, no arc exposure, long service life, safety and reliability, the former Ministry of Coal requires all mining bureaus above 40kW The promotion of the use of motor. Because the vacuum switch is superior to the air switch in performance, it has been widely used in many electromechanical devices below 40kW in recent years. For example, the electrically controlled part of the side-mounted rocker can reversibly operate the conventional air contactor Faults, short life expectancy, average