It is preconfigured with three-phase input power and single-phase output power. The AIS 3100 comes in a single tall chassis and needs no external transformers. It ships from stock and comes in 20 to 40-kVA sizes and typically works from 400-V three-phase input power. The AIS 3100 features a modern, thick-steel-plate cabinet for ruggedness. Factory-installed batteries are hot-swappable and the air filters are user replaceable.

American Power Conversion Corp., 132 Fairgrounds Rd., West Kingston, RI 02892, (800) 788-2208,