Dynamic simulation of a high-voltage circuit breaker considering the mechanical efficiency

A performance of a high-voltage circuit breaker is mainly dependent on the mechanical efficiency of spring operating mechanism. To predict the performance of the circuit breaker, the analysis of the performance of the circuit breaker is required. In this paper, the analysis model including friction and efficiency of spring was developed to predict a dynamic behavior of circuit breaker. The analysis model was developed by using 1-D based multi-physics tool, the friction and efficiency of spring were measured by using an electric linear actuator, a hydrostatic actuator and a high speed camera. The friction and efficiency of spring were acquired in experiment, the acquired data were applied in analysis model. The simulation results were compared to experimental results in dynamic behavior of circuit breaker. Hence, it is possible to predict the dynamic characteristics of the circuit breaker.