沈金波 李宏文（中国建筑科学研究院建筑防火研究所，北京市 100013）

王景凯（浙江正泰电器股份有限公司，浙江省温州市 325603）

 

Test and Study on Temperature Characteristic of Terminals of Miniature Circuit Breaker*

Shen Jinbo Li Hongwen（Institute of Building Fire Research，China Academy of

Building Research，Beijing 100013，China）

Wang Jingkai（Zhejiang Chint Electrics Co.，Ltd.，Wenzhou 325603，Zhejiang Province，China）

 

Abstract Temperature on the terminals of miniature circuit breaker is the important parameter indicating the operation state of the breaker，and is the important basis used to judge if there are electrical safety and hidden troubles of electrical fires or not. Temperature on the terminals of miniature circuit breaker under different working conditions is tested，factors such as load rate，tightening torque of the terminals and layout modes that affect the temperature on the terminals are analyzed. Moreover，the difference between inside temperature and surface temperature of terminals has been obtained. In addition，individual difference between circuit breakers of the same model has been compared and analyzed，and some important conclusions have been achieved.

Key words Miniature circuit breaker Terminals Tightening torque Temperature

 

摘 要 小型断路器接线端子的温度作为表征断路器运行状态的重要参数，是实际运行中判断电气安全和火灾隐患的重要依据。本文通过小型断路器在不同运行工况下接线端子温度的实际测试，分析了负载率、接线端子拧紧力矩和断路器布置方式等因素对接线端子温度的影响，得到了接线端子内部温度和表面温度之间的差异关系，此外还对相同型号断路器之间的个体差异进行了对比分析，获得了一些重要结论。

关键词 小型断路器 接线端子 拧紧力矩 温度