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银—氧化铜触头现用在韶山型电力机车调压开关上。调压开关是由一组凸轮控制的组合开关,韶山1型电力机车的调压开关有二十二对接触元件,组成三十三个运行级位。韶山3型电力机车的调压开关有二十对接触元件(每两对并联运行)组成八个电压级位再在每个电压级位中依靠可控硅实现平滑调压。调压开关的每对接触元件,由主触头和弧触头两部分构成,闭合过程中,弧触头先闭合,主触头后闭合;断开过程中,主触头先断开,弧触头后断开。所以正常状况下
Silver - copper oxide contact is now used in Shaoshan electric locomotive pressure switch. The pressure switch is composed of a group of cam-controlled combination switch, Shaoshan Type 1 electric locomotive switch has twenty-two pairs of contact elements, composed of 33 run-level. Shaoshan 3 electric locomotive switch has twenty pairs of contactors (each two pairs of parallel operation) composed of eight voltage levels and then in each voltage level by SCR to achieve smooth voltage regulator. Each pair of contact elements of the pressure-regulating switch is composed of a main contact and an arc contact. During the closing process, the arc contact is closed first and the main contact is closed afterwards. During the disconnection process, the main contact is disconnected first, and the arc Disconnect after contact. So under normal circumstances