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Liebert STS2/PDU

Critical Power Distribution and Switching Made Easy

This is why Liebert designed the STS2/ PDU — to bring you a distribution system that will close the power delivery loop in your critical facility. Liebert STS2/PDU offers the benefits of a custom-tailored power system, with the convenience and cost savings of a pre-packaged, factory- tested unit. Housed in a single, self- contained cabinet, it combines distribution, computer-grade grounding, isolation, and power monitoring, as well as dual-source switching, to provide the protection your vital computer or communications equipment demands.
Available in 250 – 800 A capacity systems, the Liebert STS2/PDU offers flexible expansion capabilities to fit growing sites.

A Proven System

The packaged system approach of the Liebert STS2/PDU is convenient and space-saving, reducing installation time and cost compared to a conventional approach using multiple interconnected components. The Liebert STS2/PDU is built on proven system designs used in thousands of installations. And unlike the one-of-a-kind, built-up distribution constructed at the site, it undergoes thorough factory testing as a complete system to assure reliable, consistent performance.

Flexibility
– Compact single cabinet conserves valuable floorspace compared to non-packaged solutions.

– A choice of distribution options to fit site requirements

– Easily relocated when site needs change.
Higher Availability

– Computer-grade grounding automatically establishes a single point ground to meet manufacturer and code requirements

– Fully compatible with the non-linear loads of modern computer systems and other electronic equipment.

– Standard on-unit monitoring and optional centralized monitoring capability provide continuous system visibility.

Lowest Total Cost Of Ownership

– When applied as primary side switching, costs are lower due to requiring only one power distribution unit, a lower current due to 480V vs. 208V, and lower installation and wiring costs.

– Single cabinet design reduces installation time and cost.

– UL listed as complete system.

Convenient, Fast Maintenance

The Liebert STS2/PDU requires only front, top or side access for installation, operation and maintenance. Any area requiring routine maintenance is accessed through hinged or easily removed panels. The unit is constructed of replaceable subassemblies that can be easily changed by authorized personnel without exposure to high voltage.
Nameplates are provided to identify protected devices, for error-free connection and maintenance.

Operating Specifications Liebert STS2

– Input Voltage: 208, 380, 400, 415, 480 or 600 VAC, +/- 10%

– Frequency: 50 or 60 Hz, +/- 5%

– Sense and transfer time: 4ms maximum

– Overload Capability: 125% for 10 minutes,150% for 2 minutes

– Operating Temperature: 0 to 40° C

STS2

Standard Features

– Front and side accessible for installation and service

– Color touch-screen LCD interface eliminates mechanical pushbuttons

– Intuitive user interface with drop-down menus and dialog boxes

– Triple-redundant DSP digital logic

– Dual-redundant power supplies

– 100% rated, fuseless design

– Hot-swappable circuit breakers

– Flash memory enables firmware updates while supporting critical load

– CANBUS internal control wiring

– Rack-out control/power assembly on units up to 600A, to allow maintenance, service, or full replacement without disrupting the critical load

– Top and bottom cable entry

– Dual-lug installation bus

– UL listed

Optional Features

– Full range of Liebert Open Comms hardware and software

– Programmable output relays for custom customer alarms and connections

– Customizable input relays allow alarms from other devices to be displayed on Liebert STS2/PDU display

– TVSS

– Keylock Switch

– Remote Source Selection

– Subfeed Breakers

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