It is a single phase and oil-immersed voltage transformer ,It is used for electric energy metering,voltage control and relay It is a single phase and oil-immersed product,It is used for electric energy metering,voltage control and relay protection in the electric system of rated frequency 50Hz or 60Hz and rated voltage 35kvrated voltage ratio: 33000/110V; 33000/√3:110/√3:110/3 V ; 33000/√3:110/√3 ...