1.Protecting power stealing from those cheating methods, including reversion of in-or-out lines, by pass of current-loop, short current, and others, like magnetic disturbance, DC distrubance,and so on. 2.Advanced technologies of large-scale dedicated IC (Integrated Circuit), large screen wide temperature LCD(Liquid Crystal Display), measurements for electric parameters. 3.Computation and display of the accumulated three-phase P, Q and S; measurement and display of the real time P and Q. |