Electric energy quality analyzer

The invention discloses an electric energy quality analyzer, which comprises a main board, a sampling board, a function board, a display key unit and a power board. The main board, the sampling board, the function board and the display key unit are respectively in electric signal connection with the power board. The electric energy quality analyzer can accurately and reliably collect and record electric quantity parameters such as voltage and current in each phase line, can automatically construct a power grid harmonic graph according to the collected and recorded electric quantity parameters of each phase line, analyzes the conditions of power grid harmonic distortion rate, three-phase balance degree and the like, and further judges the quality of a power grid, when the electric energy of the power grid is abnormal, an alarm can be given to facilitate electric energy management; moreover, according to the collected and recorded electric quantity parameters in the phase lines and the accumulated amount of the