The theoretical study and error analysis about on-site Calibrating technology of Low-voltage metering device composition error

摘要

The paper mainly discusses how to calculate composition error of low-voltage metering device. The composition error of metering device, the error of power meter and the ratio error of CT were calculated also by comparing the standard power meter with the calibrated power meter .The formula of error calculation was put forward, that will has an important guiding significance for the development of on-site calibrating instrument