| Title |
Evaluation Technique of Linearity of Ratio Error and Phase Angle Error of Voltage Transformer Comparison Measurement Equipment |
| Keywords |
Voltage Transformer ; Ratio Correction Factor ; Ratio Error ; Phase Angle Error ; Burdens ; Linearity |
| Abstract |
Both ratio error and phase angle error in voltage transformer(VT) depend on values of burden of VT used. A method of evaluation for linearity of ratio error and phase angle error in VT measurement equipment have been developed using the standard resistance burdens, with negligible AC-DC resistance difference less than 10^-6. These burden consists of five standard resistors, with nominal resistance of 100 Ω, 1 kΩ, 10 kΩ, 100 kΩ, and 1 MΩ. The developed method has been applied in VT measurement equipment of industry and the validity of the developed method has been verified by showing the consistency of the result of linearity obtained using VT with wide ratio error. |