# Investigation and Numerical Simulation of a High-Current AC Circuit Breaker

## Authors

• I. Murashov Peter the Great St.Petersburg Polytechnic University
• V. Frolov Peter the Great St.Petersburg Polytechnic University
• A. Kvashnin Peter the Great St.Petersburg Polytechnic University
• J. Valenta Brno University of Technology
• D. Simek Brno University of Technology
• L. Dostal Brno University of Technology
• P. Kloc Brno University of Technology

## Keywords:

circuit breaker, plasma, simulation, mathematical model

## Abstract

The article is devoted to the study of the high-current AC circuit breaker. The results of the study are presented for various configurations of the arc divider. The study includes methods of spectral diagnostics and high-speed camera shooting synchronized with the electrical characteristics of the circuit breaker (current, voltage) in time. The obtained results allow to determine the composition of the plasma and dynamics of changes in the composition of the discharge in time. Calculation of the plasma composition and properties is made according to the obtained data, which makes it possible to take into account the products of circuit breaker materials ablation in numerical simulation. Non-stationary two-dimensional mathematical model with a moving mesh is developed. The obtained results allow to correct and verify the developed mathematical model of the circuit breaker operation. The evaluation of the arc divider influence is presented in the article.

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2019-11-29

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