Seismic test of seismic simulated shaking table is one of the important means for seismic design and verifi-cation of electrical equipment. 1 100 kV column circuit breaker with fully composite bushing is used as the researchobject. Based on the seismic test method of UHV electrical equipment

seismic simulated shaking table tests underfour states of link and shock absorber are carried out. Through white noise sweep and artificial standard time historywave seismic test

the natural frequency of circuit breaker and acceleration and strain response of key parts can beobtained. By comparing and analyzing the seismic response characteristics of circuit breaker in four different states

the dynamic and seismic performance of circuit breaker with link and shock absorber is mastered. The maximumstrain of circuit breaker in four different states occurs at the support of the bracket and the bottom of the compositebushing under the action of seismic wave

the seismic responses of circuit breaker are complex and the structurepresents obvious nonlinear characteristics. Under the action of seismic wave

the anti-seismic ability of circuit break-er can be effectively improved by setting link and installing shock absorber.