This t*e of transformer is to wear the wall epoxy resin cast fully enclosed structure. For the rated frequency 50Hz rated voltage of 10kV and below the line for energy measurement and relay protection. This t*e of transformer with high dynamic and thermal stability, high accuracy full working condition condensing t*e epoxy resin casting and so on. To facilitate the interchangeability. Be improved on the basis of the original LAJ-10 package size unchanged for energy measurement and protection monitoring for switchgear and metering cabinet, is a good power management necessary equipment.