Capacitor installations are vulnerable during earthquake. The seismic behavior of 35 kV capacitor installation was studied, as well as the comparison between two methods proposed by the ‘Code for Design of Seismic of Electrical Installations’ and the ‘IEEE Std 693—2005’ for seismic design. The 35 kV capacitor installation was modeled and its seismic response was analyzed using the finite element software ANSYS. The dynamic characteristics was investigated by inputting different waves respectively, such as five amplitude modulation resonance sine waves, Elcentro earthquake wave, Landers earthquake wave and artificial earthquake wave. The result shows that the capacitor installation can meet require of seismic behavior through adding two porcelain bushings, which is higher than the middle seismic level and lower than the high seismic level defined in the ‘IEEE Std 693—2005’.