This data sheet provides the requirements for a complete on-line, PWM-type UPS system, as discussed in PIP ELSAP04 - Pulse-Width-Modulated (PWM) Uninterruptible Power Supply (UPS) System. The categories covered on this data sheet are site conditions; electrical characteristics; batteries; rectifier/charger; integral maintenance bypass device; UPS controls, monitoring, and communications; remote maintenance bypass switch; enclosures; inspection and testing; documentation; and a space for ¿other requirements.¿