前言：收购电子元件,中山收购电子元件,收购电子元件中山
主要回收项目有：回收库存电子物料，主要回收集成电路IC、各种芯片、钽电容、连接器、MOS管、晶振、二三极管、滤波器、双工器、继电器、传感器、IG、桥堆、电容电阻、服务器CPU、硬盘及SSD、DDR颗粒、flash、内存卡、TF卡，SD卡，CF卡、U盘、手机配件、平板配件、数码产品配件等，与国内众多大型单位建立了良好的合作关系，获得了诸多客户的信誉与支持。
我们的理念是：信誉放在首要位置，做到“诚信合作，价格公道合理，”是****的物资回收单位。
TQ2SA-4.5V
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TQ2SS-L-5V-ZSB3的按钮开关常开点串KM△的线圈常闭点串KMY的线圈。这个是带延时继电器的星三角带延时继电器的星三角更加方便，接线和上图的手动控制类似，只不过把按钮开关换成了延时继电器。按钮开关SB2按下去以后KM1自锁，同时延时继电器的线圈得电启动，延时继电器KT常闭点串KM2线圈，KT常开点串KM3线圈，延时时间到了以后KM3自锁。KM3的辅助常闭点串延时继电器的线圈，所以启动完成后，延时继电器也会断电。控制电机正反转完整接线这个电路用的非常多，其实就是接触器自锁和互锁的结合应用。