Aiming at defects of large output mean values and inconvenience measuring of voltage and current sensor in transformer

use micro-sensors and micro-voltage three-phase current sensors which used in smart meters to build the Lissajous diagram analysis method working frequency signal sensor micro system

which can realize accurately convert PT and CT measurement value to small value suitable for processing. This micro-system measurement precision is high

its rated operating frequency

voltage and current can match with transformers sets of PT and CT to facilitate acquisition card for data acquisition.