The 4300 Series is a state-of-the-art UPS designed for the needs of the IT industry. This newly designed UPS has the one of the largest input voltage/frequency windows in the industry. This allows for the unit to extend the life of the battery. The front end IGBT design allows the 4300 Series to work optimally at 0 to 100% load with less than 3% THD on the input. This allows for one-to-one sizing of the generator. Optional matching cabinet accessories (battery cabinet and maintenance bypass cabinet) allow for sixty combinations of three-phase/three-wire and three-phase/four-wire input/output voltages. Front end IGBT design allows UPS to work optimally at 0-100% load with less than 3% THD on the input—enabling one-to-one sizing of a generator.