The high voltage standard capacitor has many advantages such as desired linearity

small temperature coefficient and being unaffected by the external environment. We introduced a kind of 600 kV dual-purpose voltage divider based on upright-type compressed-gas high-voltage standard capacitor. The finite element analysis software of ANSOFT was used to simulate the high voltage bushing. The installation position and dimension of the grounding shield and the middle potential shield were optimized. It is found that the average of two peak values of electric field along the outer surface of busing both is 0.5 kV/mm and the bushing utilization is the best with the voltage coefficient k of 41.6%. For the design of the electrodes

the shape and size of the high voltage electrode are

determined by the value of electric field. The size of the shielded electrode is continuously optimized to uniform the electric field intensity on the surface of the low voltage electrode. In order to improve the dynamic behavior of the divider

the distance between the low voltage electrode and the out wall of the metal tank is only 25 mm. By a regression analysis

the voltage coefficient of the capacitor under power frequency voltage is less than 5×10

-5

. With the installation of low voltage arm

the step response of the divider is measured

and the partial rise time is 41.6 ns. Comparison with standard impulse resistive divider

the output waves of two dividers are in good agreement under lighting impulse voltage.