This model of voltage instrument transformers includes four versions: JDZ9-36, JDZF9-36, JDZX9-36 and JDZXF9-36. The units are cast in epoxy resin and fully enclosed. The units are suitable for electric systems of rated frequency of 50/60Hz and rated voltage of 36kV and below. They are used in indoor service conditions. The products are designed in accordance with Standards IEC60044-2 and GB1207-2006.