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.
Highlights
The most famous and most used protection device is circuit breaker
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
Different non-stationary mathematical models were created for analysis the circuit breaker operations previously, but all of these models did not take into account moving process of movement contact and ablation processes [1,2,3]
Summary
The most famous and most used protection device is circuit breaker. And there is no universal method for design of a circuit breaker at the moment, but taking into account the development of computing technology, the possibility of multiphysical simulation [1] and optimization of the circuit breaker design appears. Different non-stationary mathematical models were created for analysis the circuit breaker operations previously, but all of these models did not take into account moving process of movement contact and ablation processes [1,2,3]. Laplace smoothing [4,5,6] introduces deformed mesh positions x and y as degrees of freedom in the model and it can be described in the static case by the following equation:. In the transient case (which is most interesting for non-stationary mathematical model of a circuit breaker operation), it can be described by the following equation:. The circuit breaker prototype was produced for experimental studies with special windows (see Figure 1) for high-speed shooting and spectral analysis.
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