GSEFB (Voltage transformer for rail transportation) is designed for the use as high voltage transformer on electrically powered rail cars. The insulation consists of an outdoor-proof cycloaliphatic epoxy resin with extraordinary mechanical and electrical properties.Voltage transformers for rail transportation are used for circuit insulation voltages up to 36 kV. They are maintenance free and correspond to European and international standardsThe transformer is applicable for measuring and protective purposes and can also be used for bill/tariff metering (with PTB Certificate)