Staco Energy Products’ FLU-10S is the latest version of their FirstLine 10-kVA, three-phase Uninterruptible Power Supply (UPS).  This UPS, according to the company, has a standard battery run-time of over nine minutes (with optional batteries for extended run times). Sophisticated power electronics technology provides reliable blackout protection and power conditioning. Front-end harmonic correction eliminates the need for additional filtering, lowering the cost of operation. Robust double-conversion technology protects the connected load from sags, swells, harmonics, noise, and voltage imbalances without going to battery operation. A control panel is located on the front of the unit and includes an alarm and remote monitoring through an RS232 connection. The compact enclosure is 46-in. H x 20-in. W x 32-in. D and includes a top service entry.  FirstLine models are intended for applications with input voltage of 208, 220 and 480 VAC and a range of +10 /- 20% (166-229 VAC). Input frequency is 60Hz +/-5%. Full load walk-in from 25% to 100% of rated load in 10 seconds. Inverter output distortion is 5% THD for non-linear loads and 2% THD for linear loads. Output voltage is regulated to +/-1% of nominal at full load.