电器与能效管理技术Issue(4)：54-59,70,7.DOI:10.16628/j.cnki.2095-8188.2025.04.008
小型直流断路器用热双金属片动作特性测量方法研究
Research on Measurement Method of Thermal Bimetal Strip Action Characteristics for Miniature DC Circuit Breakers
摘要
Abstract
As the core part of the thermal overload release of the miniature DC circuit breaker,the action characteristics of the thermal bimetal strip determine the stability of the thermal overload action of the miniature DC circuit breaker.To understand the action characteristics of the thermal bimetal strip of the miniature DC circuit breaker,taking the thermal overload release for 10 A and 16 A miniature DC circuit breakers as the research objects,a measurement method for the temperature rise,deflection and thermal thrust of the bimetallic strip is proposed.The measured values are compared with the theoretical calculated values.The measured values are slightly lower than the theoretical calculated values,and the deflection error rate is within 6.70％and the thermal thrust error rate is within 8.60％.At the same time,based on the measured temperature rise of 10 A and 16 A tests,the comprehensive heat dissipation coefficients KT of the thermal overload release for 10 A and 16 A miniature DC circuit breakers are calculated to be 9 W/(m2·K)and 13 W/(m2·K)respectively.The accurate measurement of KT value provides the key parameters for the theoretical calculation of the miniature DC circuit breaker.关键词
小型直流断路器/热脱扣器/热双金属片/测量方法/综合散热系数Key words
miniature DC circuit breaker/thermal overload release/thermal bimetal strip/measurement method/comprehensive heat dissipation coefficient分类
动力与电气工程引用本文复制引用
戴冬云,涂苑婷,游一民,黄佳华,张妍,林毓基..小型直流断路器用热双金属片动作特性测量方法研究[J].电器与能效管理技术,2025,(4):54-59,70,7.基金项目
福建省科技项目(2024H0040) （2024H0040）
