PD194Z-E14 can measure parameters of multiple three phase or single phase power grid such as voltage, current, power, frequency, energy, demand, extreme value, total harmonic distortion, 2nd‐31st harmonics, voltage and current unbalance and multi‐rate electric energy measurement. The maximum measurement circuits of PD194Z‐E14 is four three‐phase circuits or twelve one single‐phase circuits. The meter adopts access mode of external current transformer and modular design which is convenient for user to choose different functions to meet different requirements at field.