Analysis on Effect of Load on Arcing Characteristics of DC Circuit Breaker

doi:10.16628/j.cnki.2095-8188.2023.01.007

Abstract

Abstract:

Firstly,the arc extinction principle of DC circuit breaker is described based on the differential equation of DC circuit model,and the influence of load time constant on DC arc energy,arc voltage and arcing time is analyzed.Secondly,the arc extinction process and the characteristics of arc voltage under different time constants (5 ms,10 ms) are analyzed by the two-dimensional arc model simulation.It is obtained that the time constant has a decisive influence on the arcing time,flashover and peak arc voltage.The simulation results are verified by the physical experiments.Based on the research on the influence of load on the arc characteristics of DC circuit breaker,a certain reference is provided for mastering how to quickly extinguish the arc,reducing the ablation of the arc on the contact,and improving the breaking reliability of DC circuit breaker.

Key words: circuit breaker, dynamic arc, load style, arc characteristics

CLC Number:

TM501.2

LIN Xinde. Analysis on Effect of Load on Arcing Characteristics of DC Circuit Breaker[J]. LOW VOLTAGE APPARATUS, 2023, 0(1): 42-49.

Figures/Tables 18

References 10

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