Uninterruptible power supply

The 500-kVA transistorized UPS has a 72 x 39-inch footprint in a 6-pulse configuration. A 12-pulse configuration measures 96 x 39 inches. The units are line-rectified products, and the inverter sections are designed with insulated-gate bipolar transistors instead of silicon control rectifiers. Features include low acoustic noise (less than 69 dBA), front-access-only design, compatibility with Load Bus Sync option, and dual-feeder strategy.