Fuse Temperature Simulation Calculation Based on Finite Element Analysis

doi:10.16628/j.cnki.2095-8188.2022.01.013

Abstract

Abstract:

The fuse in the ring cabinet operates under the high current environment for a long time,which can easily cause local temperature to rise,and in severe cases will destroy the insulation of the melt isolation cylinder,resulting in the burning of ring net cabinet.In order to reduce the fuse failure,the 3D simulation model of 6/12 kV fuse is established by finite element software,and the temperature field simulation under different operating conditions is calculated.The results show that the outer wall temperature of the fuse is the highest in the middle position.It is gradually decreasing along the axial symmetry,and the ambient temperature does not affect the temperature difference of the outer wall.The temperature difference of the outer wall of the fuse in the low load,stable and overload fusing stage is respectively less than 9 ℃,9~11 ℃ and 24~42 ℃.Therefore,in practice,the temperature difference between the outer wall of the fuse can be used to judge its operating state,which is of practical significance to improve the operating reliability of the fuse.

Key words: ring net cabinet, fuse, finite element analysis, temperature difference, reliability

CLC Number:

TM563

ZHAO Aqin. Fuse Temperature Simulation Calculation Based on Finite Element Analysis[J]. LOW VOLTAGE APPARATUS, 2022, 0(1): 63-66.

Figures/Tables 10

References 10

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部位	材料	导热系数/ [W·(m·K)^-1]	密度/ (kg·m^-3 )	电阻率/ (Ω·m)
外壳/骨架	氧化铝陶瓷	35	3 965	-
灭弧介质	石英砂	10	2 000	-
熔体	金属银	429	10 500	1.6×10^-8
触头帽	金属铜	401	8 300	-

温差/℃	运行状态	操作说明
<9	低载	持续观察
9~11	稳定	持续观察
24~42	过载	熔断器如未熔断,考虑熔断器老化, 建议更换熔断器

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