Calibration System for Electronic Instrument Transformers with Analog Output Based on LabVIEW

The output signal of electronic instrument transformers is different from that of conventional electromagnetic transformers,and the definition of error has changed.However,conventional calibration systems are not suitable for testing electronic instrument transformers.This paper introduces a calibration system based on LabVIEW for electronic instrument transformers with analog output.This calibration system can determine such performance indices of electronic instrument transformers as ratio error,phase-angle error accurately,the experimental results show that the system is stable and has high accuracy.