Harmonic measurement device

The utility model provides a harmonic measurement device which the structure is: the three phase current that comes from the electric wire netting imports electric quantity detection unit respectively after passing through current transformer, current -to -voltage convertor and harmonic and protection circuit I in proper order, electric quantity detection unit is inputed respectively after passing through resistive voltage divider network and filtering and protection circuit I in proper order to the three phase voltage that comes from the electric wire netting, microcontroller connects between electric quantity detection unit and communication unit, and communication unit passes through the bus with data upload, an item voltage in the three phase voltage exports microcontroller to through the optical coupling isolation unit after, and microcontroller carries out analysis processes to the received signal. The utility model discloses when realizing conventional electrical measurement, solved electric wire netti