LOW VOLTAGE APPARATUS ›› 2021, Vol. 0 ›› Issue (6): 36-40.doi: 10.16628/j.cnki.2095-8188.2021.06.006

• Modeling and Simulation • Previous Articles     Next Articles

Study on Temperature Rise Characteristics of Outdoor 1 000 A Low Voltage Fuse

WANG Guoqing1, XIONG Jun1, JIAO Xianan1, LIU Chun2, ZHANG Yan2, LIU Xun2   

  1. 1. Guangzhou Power Supply Company,China Southern Power Grid Co.,Ltd.,Guangzhou 510620,China
    2. State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Huazhong University of Science and Technology,Wuhan 430074,China
  • Received:2021-02-14 Online:2021-06-30 Published:2021-10-13

Abstract:

Taking a commonly used outdoor 1 000 A low voltage fuse as a study object,the variation law of temperature rise and pre-arc time with various factors,such as material parameters,ambient temperature and heat dissipation characteristics,is studied by using Ansys.It is shown that with the change of the parameters of the outdoor fuse,the variation law of the temperature rise characteristics,the pre-arc time and the maximum temperature rise is different.The change of the ambient temperature leads to the small change of pre-arc time;the increase of the resistivity of the fuse and the decrease of the air convection heat transfer coefficient has a great influence on pre-arc time.If the steady temperature rise near the rated current of outdoor low voltage fuse exceeds the melting point of the fuse,the fuse may be slightly molted and will lead to light fuse molten fault.

Key words: fuse, temperature rise characteristics, pre-arc time, convection heat transfer

CLC Number: