Analysis of Aseismic Capacity and Seismic Isolation of High Voltage Breaker

Abstract

According to the weakness character of seismic capacity of high voltage breaker and ensuring no damage at the time of the earthquake, the LW58-252 breaker is used as research object to carry out the aseismic capacity and seismic Isolation analysis. Firstly, the modal analysis of LW58-252 high voltage breaker is carried out, the natural frequency and mode shape of the breaker is calculated, and the easily damaged parts of the high voltage breaker are determined. Secondly, according to the standards of the IEEE Std-693-2005 and GB/T 13540-92, natural El-centro wave and Taft wave are used to carry out the level excitation of the high voltage breaker, and the time history analysis of the displacement and stress of the vulnerable parts of LW58-252 are carried out, and the maximum displacement and maximum stress of vulnerable parts are determined. Finally, the performance of Seismic Isolation of breaker is carried out, and the influence of seismic isolation on the max displacement and stress of breaker is study. The above research can provide technical support for the seismic design optimization of the breaker.