介绍了3TB40交流接触器辅助触头可靠性试验的方法和试验监测结果。
The paper introduces the method and monitoring result of reliability test research on auxiliary contact of 3TB40 AC contactor.
断路器可以加装分励脱扣器、压脱扣器，辅助触头，报警触头和电动操作机构。
The Breaker can be attached with shunt tripping device, undervoltage tripping device, auxiliary contacts, alarm contacts and motor-operated drive.
接触器还可方便地加装辅助触头组，和适当的热继电器组合，保护可能发生过负载的电路之用。
Contactor can be easily retro-fitting auxiliary contact group, and appropriate combination of thermal relay to protect the load that may have been circuits.
表示为25a接触器的主触头为三对常开，辅助触头为一对常开，控制线圈的电压为直流110v，订货数量为20台。
Means need 25a contactor, main contact are three normally open, auxiliary contact is one normally open, control coil voltage is DC 110v, order volume is 20 sets.
通过对断路器主触头与辅助触头的动作情况进行分析，提出了一种不用拆开合闸电阻与主触头的连接线就可以测量合闸电阻的方法，而且可以同时测出合闸电阻的提前合闸时间。
In this paper, the abnormal phenomenon of the closing time of a 500 kV circuit breaker was analyzed, and actions taken to avoid the condition in the other sites were put forward.
通过对断路器主触头与辅助触头的动作情况进行分析，提出了一种不用拆开合闸电阻与主触头的连接线就可以测量合闸电阻的方法，而且可以同时测出合闸电阻的提前合闸时间。
In this paper, the abnormal phenomenon of the closing time of a 500 kV circuit breaker was analyzed, and actions taken to avoid the condition in the other sites were put forward.
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