摘要
熔断器是使用最广泛的配电设备保护装置。本文设计了一种新型全绝缘喷射式熔断器。该熔断器采用全绝缘全封闭的一体化结构,可以有效避免外界环境因素对其性能的影响。它采用狭缝灭弧方式并结合力学弹射原理,提高了其关合稳定性、灭弧性以及安全性。本文研究了熔断器开断短路电流的暂态过程,建立了熔丝熔断物理过程的数学模型,分析了熔丝熔化过程中电阻率的变化情况。为了验证所设计的全绝缘喷射式熔断器的动作可靠性,本文分别在5%额定电流、额定电流以及1.3倍额定电流下测量了该熔断器的燃弧时间。
The fuse is used most widely as the power-distribution-equipment protective device.This paper designs a new type of fully insulated jet-type fuse.It has an integrative structure of full insulation and enclosed type,which can effectively avoid the influence of environmental factors on its performance.The slit arc-control method combined with mechanical ejection theory improves the closing stability,the performance of arc control and the security of the fuse.This paper studies the transient process of the fuse’s broken short-circuit current,and establishes the mathematical model of the fuse-melting physical process,and analyses changes of resistivity in the fuse-melting process.In order to verify the reliability of the fully insulated jet-type fuse,the arc-melting time of the fuse at 5%of rated current,rated current and 1.3 times of rated current are respectively measured.
作者
谢龙君
倪周辉
王国义
陈振虎
徐莉莉
Xie Longjun;Ni Zhouhui;Wang Guoyi;Chen Zhenhu;Xu Lili(State Grid Ningbo Electric Power Supply Company,Ningbo,Zhejiang 315000;State Grid Zhejiang Xiangshan Power Supply Co.,Ltd,Xiangshan,Zhejiang 315700)
出处
《电气技术》
2019年第8期75-79,共5页
Electrical Engineering
关键词
熔断器
全绝缘
喷射式
狭缝灭弧
燃弧时间
fuse
full insulation
jet-type
slit arc-control
arc-melting time
