1.  Energy Saving PrincipleCooling Down to Save Power:  "Harmonic Wave" and "Surge" both increase iron & line            losses of the inductive load, and the impedance of electric  transmission line of            switch arcing also induces temperature rise and power consumption. Yinying YY            Series Energy Saving Power Supply can eliminate the "Harmonic Wave" and "Surge",            and also can abate this part of power consumption.Buffering to Save Power:  Yinying YY Series can cut down the impacts brought on the             electrometer by the "Instantaneous Currents" of internal and external circuits,   &nb