The voltage transformer of this type is single-phase, casting resin insulated and fully enclosed products. It is used for metering electric energy, voltage control and relay protection in the e;ectriic non-useful-ground neutral system up to rated frequency 50HZ or 60HZ and rated voltage 3kV, 6kV, and 10kV.

These voltage transformers are casting resin insulated, fully enclosed type. The iron core and winding are casting together. It is small and light. The secondary outlet line is wrapped by outlet box and has three exits with different direction feed lines.