Power Distribution — Vertiv™ Liebert® STS2
Liebert® STS2
A static transfer switch that gives single-corded loads the reliability of dual-corded power, switching between two independent UPS sources in a quarter cycle.
100–1,850 A
Quarter-cycle transfer
Dual-bus redundancy
or call (800) 222-1440
What’s Built In
Automatic, seamless transfer between two power sources.
- Automatic, seamless transfer between the outputs of two independent UPS systems in a dual-bus configuration
- Both 60Hz and 50Hz systems, with multiple input voltages from 208–600VAC
- If the primary UPS fails, loads transfer to the alternate source automatically
- Available from 100A to 1,850A across the ST, SR, and SX series
- Combines fast switching, power isolation, monitoring, and grounding in a single package
Gives single-cord loads the reliability of dual-cord power, or adds redundancy to devices that are already dual-corded. Designed for dual-bus power applications in a single, space-saving unit.
Model range
Three series, scaled by amperage.
ST Series, 100–1,000A
77″ H × 30–84″ W × 32″ D · 780–2,500 lbs
SR Series, 400–600A
69.4″ H × 31.7″ W × 32″ D · 1,200 lbs
SX Series, 1,200–1,850A
88″ H × 25.7″ W × 35.6″ D · 1,430 lbs
Full Specifications
Every number, for the people who ask for them.
| Amperage range | 100–1,850 A |
| Frequency | 60Hz or 50Hz |
| Input voltages | 208, 220, 240, 280, 400, 415, 480, 575, 600 VAC |
| Height | 69.4–88 in, by series |
| Width | 25.7–84 in, by amperage |
| Depth | 32–35.6 in |
| Weight | 780–2,500 lbs, by amperage |
| Warranty | One-year limited, defects in material and workmanship |
| Best fit | Single-corded loads needing dual-bus redundancy |
Exact amperage, series, and input voltage are confirmed at quote against your dual-bus configuration.
Ready to spec the STS2?
Tell us which loads are single-corded and we’ll size the switch.