Toshiba's 4200FA Series is a state-of-the-art designed three-phase UPS offering a number of options to meet customer needs. The 4200FA Series has the largest input voltage/frequency window in the industry, which allows the unit to be user-friendly to the batteries, thus extending overall battery life. Backed by a standard three-year warranty, the 4200FA XT models allow for internal isolation transformers to be built in the cabinet. The XT is manufactured for extreme conditions and ideal for a wide variety of three-phase voltage applications.