Influence of Contact Bridge on Short-Time Withstand Current Capacity of AC Contactor

doi:10.16628/j.cnki.2095-8188.2023.02.006

Abstract

Abstract:

Through the thermal stability and conductor current carrying capacity analysis,the effects of contact bridge material and conductor current carrying capacity and other factors on the short-time withstand current capacity of AC contactor is clarified.The different materials and production processes of four kinds of contact bridges were adjusted.Their short-time withstand current capacity was compared through tests.The test results show that the short-time withstand current capability of AC contactor can be effectively improved by selecting high conductivity materials as conductors and increasing the cross-sectional area of conductors.

Key words: thermal stability, current carrying capacity, AC contactor, short-time withstand current

CLC Number:

TM572.2

HU Guowei, JI Xinhua, WANG Zhenkun, ZHANG Hongwei, XIAO Haiqiang, LI Hui. Influence of Contact Bridge on Short-Time Withstand Current Capacity of AC Contactor[J]. LOW VOLTAGE APPARATUS, 2023, 0(2): 31-34.

Figures/Tables 11

References 9

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方案	方案描述
A	接触桥材质为3.0铜钢复合带,覆铜层厚度为接触桥厚度的8%
B	接触桥材质为3.0铜钢复合带,覆铜层厚度为接触桥厚度的12%
C	在方案A的基础上,在接触桥上焊接3层铜片,每片厚度0.1 mm
D	在方案A的基础上,在接触桥表面镀银2~3 μm

试验方案	试验前后	开距/mm			总程/ mm	开距参数变化范围/mm
试验方案	试验前后	A相	B相	C相	总程/ mm	开距参数变化范围/mm
方案 A	试验前试验后	8.52 9.62	8.82 9.80	8.62 9.91	11.51 11.48	0.98~1.29
方案 B	试验前试验后	8.90 9.12	8.71 8.94	8.62 8.98	11.46 11.44	0.22~0.36
方案 C	试验前试验后	8.85 9.05	8.45 8.75	9.09 9.22	11.41 11.43	0.13~0.30
方案 D	试验前试验后	8.61 8.95	8.73 8.81	8.82 9.02	11.40 11.37	0.08~0.34

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