This model voltage and current combined transformer (another name is metering tank) is applied to three-phase circuit of AC 50HZ and rated voltage being 10-35kV, to be used for voltage, current and energy measuring as well as protective relaying. It is suitable for urban, rural outdoor transformer substation as well as kinds of voltage transformer substations. This product can replace oil-immersed type combined trandformer (metering tank).

It is composed of two sets single-phase wholly insulated voltage transformers forming V/V wiring mide, and two current transformers are seperately series connected to A and C phase. Moreover, the second ary coil of current transformers owns tap, through which gains different current changing. Based on three-phase two-component V/V wiring mode, the corresponding upgraded product is three-phase three-component Y/Y wiring high voltage power metering tank.