Experimental investigation of interrupting capacity of low voltage circuit breaker

Abstract

The experimental results of the circuit breaker interrupting capacity are presented in the article. The scheme of the experimental workbench and diagnostic methods are described. The study was performed using high-speed shooting methods. The high-speed shooting results and diagrams for different modes are presented. The analysis of the arc divider geometry influence on the extinguishing process for different modes and power factor is completed. A parametric study of the influence of the power factor, the interrupting current magnitude and the moment of switching on the extinction of the electric arc in the circuit breaker is also performed. The influence of the arc chute geometry on the formation of a new arc attachment point is shown in the article. The test was carried out on the basis of a specially developed prototype of a low-voltage circuit breaker (AC). The obtained results can be used when designing a low-voltage circuit breaker (AC).