Adopting indirect method to realize test of ratio, ratio error and phase angle error, and etc.
Through Ratio and admittance test, calculate out the error of 80%-120% rated voltage under rated burden and lower limit burden.
Small size and light weight, suitable for field test of Capacitance PT.
Voltage ratio test.
Check wiring and judge wrong wiring, meanwhile show “reverse polarity” or “secondary open” or “wrong ratio” and correct primary voltage value.
Test No-load error under 2.2KV.
Test the error generated by primary & secondary rated burden.
Test secondary excitation admittance and get no-load error under 80%, 100% and 120% rated voltage.
Test the error of secondary winding 1n1a and 2n2a under rated burden and lower limit burden under 80%,100% and 120% rated voltage, and process the error value.
