Abstract
We present a technique for modeling dynamic characteristics of a vacuum circuit breaker. In the first part of this paper, the structural dynamics and vibration characteristics of a vacuum circuit breaker are experimentally examined. From these results, a structural dynamic model of tripping is formulated with consideration of the impact phenomenon. The results of the numerical simulation using the initial design variables are compared with experimental results. The effect of design variables such as speed and overshoot of a moving contact for tripping are discussed. Finally a guiding principle to determine the design variables is proposed to optimize the dynamic characteristics of a vacuum circuit breaker.
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