This article designs two new types of 252 kV environmentally friendly GIS double break vacuum circuit breaker voltage sharing structures

the two different equalizing methods are adopted

namely

one capacitor is connected in parallel at each break of the double-break vacuum interrupter

or two capacitors are connected in parallel at each break

comparative analysis of electric field values calculated by different voltage equalization methods

the influence of different voltage equalization methods on the electric field of the main components of the double break vacuum circuit breaker has been obtained. The calculation results show that: the voltage equalization method of parallel single capacitor in the vacuum arc-extinguishing chamber only reduces the non-uniformity coefficient between the breaks

however it will lead to excessive electric field strength of the shielding cover and the contact

the voltage equalization method of two single capacitors connected in series not only reduces the non-uniformity coefficient of the fracture

but also reduces the potential difference between the suspended shielding cover in vacuum interrupter

making the potential distribution more uniform

reducing the field strength value of the shielding cover and contacts

relative to the voltage equalization method of parallel single capacitorsand the maximum electricfield strength is reduced by 25.78%.