广州3TB39220XP2西门子接触器经销商 3TB39100XQ0

电路的装置，所以经常运用于电动机做为控制对象﹐也可用作控制工厂设备﹑电热器﹑工作母机和各样电力机组等电力负载，接触器不仅能接通和切断电路，而且还具有低电压释放保护作用。接触器控制容量大，适用于频繁操作和远距离控制,是自动控制系统中的重要元件之一。
在工业电气中，接触器的型号很多，工作电流在5A-1000A的不等，其用处相当广泛
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半导体接触器：半导体接触器是一种通过改变电路回路的导通状态和断路状态而完成电流操作的接触器。
永磁接触器：永磁交流接触器是利用磁极的同性相斥、相吸的原理，用永磁驱动机构取代传统的电磁铁驱动机构而形成的一种微功耗接触器。
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另一半是活动铁芯，构造和固定铁芯一样，用以带动主接点和接点的闭合断开。
20A以上的接触器加有灭弧罩，利用电路断开时产生的电磁力，快速拉断电弧，保护接点。
接触器可高频率操作，做为电源开启与切断控制时﹐高操作频率可达每小时1200次。
接触器的使用寿命很高，机械寿命通常为数百万次至一千万次，电寿命一般则为数十万次至数百万次。
技术发展
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