The measurement method and error influence factor for capacitance and dielectric loss angle tangent value are analyzed through introducing the principle and basic structure of 750 kV capacitor voltage transformer.It is concluded

throughout comparison and analysis between on-site test result and delivery test result

that the errors generated by such test method is small

which can fully meet the need of actual operation

have a positive guiding significance to determine accurately site equipment status and improve the measurement accuracy and efficiency of high voltage class CVT parameter.