The Eksi 3C3 Series UPS is a new generation of three-phase high frequency online UPS developed the latest and designed and manufactured with the application experience, which, with the advanced DSP digital control technology adopted, so as to upgrade effectively the product performance and reliability and with a unique heat dissipation and structural design used, so as to achieve higher power density integration and miniaturization, is widely used in the small- and medium-sized data centers, the network management centers and the enterprise server rooms as a key equipment for the power supply and protection and as a good solution scheme provided for such statuses occurred in the commercial electric grid as the power interruption, too high or too low voltage, instantaneous drop of voltage, damped oscillation, harmonic distortion, clutter interference and frequency fluctuations, so as to provide the users with safe and reliable power supply protection.