The current instrument transformers LZZBJ9-36 are fully enclosed and cast in epoxy resin. The transformers are designed for electric power systems of rated frequency 50Hz/60Hz and rated vo ltage of 3 6kV. They are used for indoor mounting. The performances of the products meet standards IEC60044-1 and GB1208-2006. The products are used in metering electric energy, voltage controlling and relay protection applications.