摘要
对小型断路器(MCB)的过载保护特性及校验方法进行分析,得到非基准温度下的过载保护特性等效校验方法。通过对MCB标准试验的发热分析,利用热双金属片的热平衡方程,得到了通约定不脱扣电流和约定脱扣电流时的稳定温升,以此作为临界范围判断值,得到了非基准温度下等效约定时间、等效试验电流和环境温度三者之间的理论公式。通过理论分析和试验验证,探索了非基准温度下MCB过载保护特性等效校验方法在过载保护特性中的运用。
The overload protection characteristics of a miniature circuit breaker( MCB) and its calibration method were analyzed,and the equivalent calibration method of overload protection characteristics at non-reference temperature was obtained. Through the heat analysis of the MCB standard test,the stable temperature rise when on conventional untripping current or conventional tripping current is obtained by using the thermal balance equation of the thermal bimetallic sheet,which is used as the judgment value of the critical range,and the theoretical formula between the equivalent agreed time,the equivalent test current and the ambient temperature under the non-reference temperature was obtained. Through theoretical analysis and experimental verification,the application of the equivalent verification method of MCB overload protection characteristics at non-reference temperature in overload protection characteristics was explored.
作者
曹潇文
朱翔鸥
黄峰
CAO Xiaowen;ZHU Xiangou;HUANG Feng(Wenzhou University, The Technology Engineering Center of Low Voltage Electrical Intelligent of Zhejiang,Wenzhou 325035 ,China;Wenzhou Transportation Bureau , Wenzhou 325000,China)
出处
《电器与能效管理技术》
2019年第12期32-35,共4页
Electrical & Energy Management Technology
基金
浙江省重点研发计划项目
关键词
小型断路器
过载保护特性
等效校验
环境温度
miniature circuit breaker ( MCB )
overload protection features
equivalent check
environment temperature
