Simulation and Experimental Studies of Temprature-Rise Characteristics of Air Circuit Breaker

doi:10.16628/j.cnki.2095-8188.2021.04.008

Abstract

Abstract:

Air circuit breaker is widely used in low voltage distribution system.Its temperature-rise characteristics have critical effects on the safety of power equipment and system.Firstly,the calculation process and basic principle of electromagnetic-thermal-fluid multiphysics coupling method to calculate the temperature rise of the circuit breaker are discussed.Secondly,the simulation calculation model of the air circuit breaker is built,and the boundary conditions of the simulation calculation are discussed.After that,the steady-state temperature rise simulation of the air circuit breaker under natural convection is completed,and the temperature rise characteristics of each component of the circuit breaker are obtained.Finally,in order to verify the calculation results,the temperature rise test of the air circuit breaker is carried out.The results show that the temperature rise calculation error rates of the terminals are less than 10%,which proves the validation of the proposed electromagnetic-thermal-fluid multiphysics coupling method to calculate the temperature rise.

Key words: air circuit breaker, temperature rise, electromagnetic-thermal-fluid, finite element, natural convection

CLC Number:

TM561

QU Jianyu, XU Hongyu. Simulation and Experimental Studies of Temprature-Rise Characteristics of Air Circuit Breaker[J]. LOW VOLTAGE APPARATUS, 2021, 0(4): 40-45.

Figures/Tables 9

References 13

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