接触器是一种重要的电器，广泛应用于电力、配电和用电场合。

当接触器不吸合时，可能有以下几个原因：1、接触器线圈没有通电；2、接触器线圈损坏；3、控制接触器线圈的输出继电器故障；4、推动放大三极管或可控硅故障；5、芯片输出管脚电平没有信号。接触器分为交流接触器（电压AC）和直流接触器（电压DC）。

接触器的工作原理是利用线圈流过电流产生磁场，使触头闭合，以达到控制负载的目的。当接触器线圈没有通电时，无法产生磁场，触头无法闭合，导致接触器不吸合。此时，需要检查接触器线圈是否通电，如有问题则需要修复或更换。

如果接触器线圈正常，但接触器仍无法吸合，可能是接触器线圈损坏。这种情况下，需要更换接触器线圈。

如果接触器线圈和接触器本身都正常，但是接触器仍无法吸合，可能是控制接触器线圈的输出继电器出现故障。输出继电器是控制接触器线圈通电的关键部件，如果输出继电器故障，接触器将无法吸合。此时，需要检查输出继电器是否正常工作，如有问题则需要更换。

如果以上三个原因都排除，还需要检查推动放大三极管或可控硅是否故障。推动放大三极管或可控硅是控制接触器的重要组成部分，如果出现故障，接触器将无法吸合。需要检查这些元件是否正常工作，如有问题则需要更换。

***，如果以上几个原因都排除了，芯片输出管脚电平没有信号也可能导致接触器无法吸合。此时，需要检查芯片输出管脚电平是否正常，如有问题则需要修复或更换。

总之，当接触器不吸合时，需要仔细检查以上几个原因，找到问题所在并及时解决。这样才能确保接触器正常工作，***电力、配电和用电场合的正常运行。

Allen-Bradley接触器*代表线圈电压（也是接线的电压）

IEC 标准接触器

A-B 交流接触器，性能灵敏。

适用于各种工业自动化场合

寿命长，耐温高，安全低压电气的***产品

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