Liebert STS2 SR 400A

Liebert STS2 SR 400A | FeatureInfographics

For maximum availability applications, Liebert STS2 SR static transfer switch provides an automatic, seamless transfer between your critical load and the outputs of two independent UPS systems in a dual-bus power configuration. If the primary UPS should fail, the switch will automatically transfer the loads to the alternate UPS.

Features

Automatic switching for dual bus loads
Patented Optimized Transfer option
Matches first generation Liebert STS1 footprint while optimizing conduit landings
Accepts existing Liebert STS1 ancillary accessories and sidecar cabinets
Offers primary or secondary side switching
100% rated, fuseless design
Top and bottom cable entry/exit
Unity communication network card

Benefits

Operates efficiently Compact, space-saving design
Ideal replacement for first generation Liebert STS1 switches
Optimized transfer algorithm ensures smooth, safe power switching
Internal CANBUS protocol: high-bandwidth communication between system components via twisted-pair cables.
Triple redundant logic with dual power feeds.
Standard on-unit monitoring and optional centralized monitoring capability provide continuous system visibility.
When applied as primary side switching, cost are lower due to requiring only one power distribution unit, a lower current due to 480V vs. 208V, and lower installation and wiring cost.