Voltage Transformers are used to step down the voltage from a high value (say 33000 V) to a lower value (110 V) suitable for measuring instruments like voltmeters, energy meters and protective relays. Residual Voltage Transformers (RVTs) are special type of Voltage Transformers used to protect the Capacitor Banks from Earth fault.
Specification
Advantages : Provides electrical isolation between high voltage power circuit and measuring instruments
