煤矿使用煤位继电器十分普遍,例如满大眼信号或运输系统的煤漏斗的卡眼信号等。煤位继电器虽种类很多,但归纳起来有三个不足之处。有的线路过于复杂,影响可靠性,有的检测电压偏高,很不安全,有的没有防漏装置,误动作十分严重。我矿在学习兄弟单位经验的基础上,为对我矿三号主皮 The use of coal level relays in coal mines is very common, for example, the full eye signal or the transport system of the coal hopper card hole signal. Although there are many types of coal level relay, but summed up there are three deficiencies. Some lines are too complicated, affecting the reliability, and some detection voltage is high, very unsafe, and some do not leak-proof device, malfunction is very serious. My mine in learning brothers unit based on the experience of mine on the 3rd main skin