Static Transfer Switch has integrated power distribution.

Press Release Summary:

Model STS2/PDU integrated static transfer switch and power distribution center is designed to reduce space requirements and simplify power system design and installation. Available with various distribution options, it features triple-redundant logic and redundant power supplies as well as color touch screen display. Single solution delivers switching, power isolation, distribution, monitoring, and computer-grade grounding in self-contained package.

Original Press Release:

Emerson Network Power Introduces the Liebert STS2/PDU

New Static Transfer Switch Features Integrated Power Distribution

To Reduce Space Requirements and Simplify Power System Design and Installation

COLUMBUS, Ohio, February 17, 2004 -Emerson Network Power, a business of Emerson (NYSE:EMR) and the world leader in high availability power protection through its Liebert brand, today introduced the Liebert STS2/PDU. This new integrated static transfer switch and power distribution center is designed to reduce space requirements and simplify the design, installation and management of high availability power systems.

The Liebert STS2 provides fast switching between AC power sources, enabling even single-corded computer systems to benefit from the increased availability made possible by dual-bus power systems. It features triple-redundant logic and redundant power supplies for outstanding reliability, and a color Touch Screen display for easy operation and management. Two Liebert Precision Power Centers have now been integrated into the STS2 cabinet to create the Liebert STS2/PDU, a single solution that delivers switching, power isolation, distribution, monitoring and computer-grade grounding in a self-contained package.

"Our customers continue to seek new solutions to increase the availability of critical systems as simply and efficiently as possible," said Bill Barcus, Product Manager, Liebert Corporation. "This new system combines our market-leading static transfer switch with a complete power distribution system to provide a compact, factory-tested solution that simplifies the design and management of high availability power systems."

In addition to saving space, the STS2/PDU eliminates on-site wiring of the static transfer switch to two power distribution units, simplifying installation and enhancing installation reliability. This factory built and tested system ensures all wiring is properly sized, all connections have been tested, and all grounding is optimized for the system.

Key features of the Liebert STS2/PDU

- 100 percent rated in 250A, 400A, 600A and 800A sizes.

- Automatically establishes a single-point ground in accordance with the National Electrical Code.

- Centralized monitoring and alarm display for the transfer switch and power distribution system simplify power system management

- Front and side access increases location flexibility.

- Compact design saves 10 square feet of floor space compared to transfer switch and power distribution in separate cabinets.

- Built-in transformers eliminate harmonic neutral currents that can exist in building wiring systems.

- Main input breaker provide overcurrent protection and power disconnect.

- Available with wide range of distribution options, including output circuit breaker, subfeed circuit breakers, and inline and I-line panelboards.

For more information about the Liebert STS2/PDU or any other Liebert products, visit or call 1-800-877-9222.

About Liebert

Liebert, an Emerson Network Power company, is the world leader in systems that protect the availability of computers and other sensitive electronics. Liebert delivers unparalleled protection of critical systems through a complete range of power, environmental and monitoring systems that are tailored to application requirements by a network of local representatives that average better than 16 years of experience in the industry. Liebert Global Services is the world's largest service team dedicated to the maintenance and on-site repair of critical computer support systems. For more information on Liebert, visit

About Emerson Network Power

Emerson Network Power is an Emerson business that provides a full spectrum of reliable power solutions, including inbound power, connectivity, power supplies, power systems and precision cooling, backed by the largest global services organization in the power industry. These Emerson companies serve the needs of telecommunications networks, data centers, health care and industrial facilities worldwide. For more information, visit

About Emerson

St. Louis-based Emerson ( is a global leader in bringing technology and engineering together to provide innovative solutions to customers in electronics and telecommunications; process control; industrial automation; heating, ventilating and air conditioning; and appliance and tools. Sales in fiscal 2003 were $14 billion.

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