JDZ(X)9-15,20 voltage transformer , epoxy resin casting and fully enclosed construction, is used indoor for measuring current, electric energy and protective relaying in the electric system with the frequency 50Hz or 60Hz and highest voltage for equipment 17.5kV (Up to 24 kV) .

The product has the feature of high reliability, low magnetism of core, large creep distance of external insulation and maintenance free etc.