Online Uninterrupted Power Supply has fully digitized microprocessor controlled operation and LCD display front panel. The Online Uninterrupted Power Supply also has cold start function and provides pure sine-wave output with less than 3% THD. The Online Uninterrupted Power Supply gives protection from overload, short circuit, low battery, over charging, high/ low input voltage, reverse phase etc. Online Uninterrupted Power Supply of VDG series is made of quality grade raw materials that ensure long service life.