山西施耐德交流接触器

长沙汇业电气工程有限公司

无噪音：

??交流器合闸保持是靠线圈通电使硅钢片产生电磁力，使动静硅钢片吸合，当电网电压不足或动静硅钢片表面不平整或有灰尘、异物等时，就会有噪音产生。而永磁交流器合闸保持是依靠永磁力来保持的，因而不会有噪音产生。

??③. 无温升：

??器依靠线圈通电产生足够的电磁力来保持吸合，线圈是由电阻和电感组成的，长期通以电流必然会，另一方面，铁芯中的磁通穿过也会产生热量，这两种热量在器共同作用，常使器线圈烧坏，同时，主触头容量。而永磁交流器是依靠永磁力来保持的，没有维持线圈，自然也就没有温升。

??④. 触头不振颤：

??交流器的吸持是靠线圈通电来实现的，吸持力量跟电流、磁隙有关，当电压在合闸与分闸临界状态波动时，器处于似合似分状态，便会不断地振颤，造成触头熔焊或烧毁，而使电机烧坏。而永磁交流器的吸持，完全依靠永磁力来实现，一次完成吸合，电压波动不会对永磁力产生影响，要么处于吸合状态，要么处于分闸状态，不会处于中间状态，所以不会因振颤而烧毁主触头，烧坏电机的可能性就大大。

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接触器

接触器分为交流接触器（电压AC）和直流接触器（电压DC），它应用于电力、配电与用电场合。接触器广义上指工业电中利用线圈流过电流产生磁场，使触头闭合，以达到控制负载的电器。作用：在电工学上，因为可快速切断交流与直流主回路和可频繁地接通与大电流控制（达800A）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。在工业电气中其用处相当广泛。

Reference

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