Critical space limitations in today’s

high-speed, high-volume Internet and Corporate data centers have resulted in the need for integration of power delivery systems to the critical loads. L-3 Communications/Power Systems Group’ fault tolerant static transfer switch with an integrated power distribution unit (STS-PDU) provides uninterrupted power to vital loads while also transforming and distributing power at voltages required by the critical computers — all from a space-saving, small-footprint unit. The STS-PDU starts with L-3/Power

Systems Group advanced technology and high reliability fault tolerant STS. It is able to automatically transfer critical loads from a primary power source to an alternate power source in less than 1/4 cycle, under any emergency condition — more than 16 times faster than the fast-est electromechanical switch. By making available one of two completely separate and redundant power sources to all critical loads, it is the ultimate power protection for even the most critical applications. This unit also provides for 480

volts to 208 volts (or any worldwide volt-age) transformation as required by most computer loads. Using the most recognized and utilized magnetics technology leader in the industry, the STS-PDU comes with two

premium isolation/step down transformers from L-3/Power Magnetics. These are also available with optional harmonic cancella-tion features for high-harmonic content environments. The STS-PDU has been designed to be the smallest package available in the industry and does not require rear access. This feature alone saves thousands of square feet and space by eliminating a 3.5 foot aisle between the rear of the equipment and the walls. This system adds redundancy to your power delivery systems while sav-ing you valuable revenue-generating space.

STS-PDU-I

T h e P o w e r i s H e r e™

B U L L E T I N 9 2 5 POWER SYSTEMS GROUP

STS-PDU-ISTS Power Distribution Unit (STS-PDU-I)

Standard Features

n Redundant logic powern Manual bypass/isolationn Plug-in circuit breakersn Extensive self-monitoringn Remote control and monitoringn Additional RS-485 control and

monitoring portn All adjustable digital set parametersn UL 1008 compliantn UL 1012 listedn Fault tolerant transfer logicn 1/4 cycle transfer without cross connection for all conditionsn Non-fused hockey puck SCRs (Type II and III operation)n Data loggern K-factor 4-20 isolation transformers (shielded)n Automatic/manual transfer controln Comprehensive metering and alarmsn Open- and shorted-SCR detectionn 560,000 hours MTBF calculated (10 million hours MTBF actual field

operation as of June 30, 2002)n UL approved short circuit tested

Applications:

n Internet and corporate data centers

n Telecommunications centers

Options:

n Remote monitoring & BMS interface

n Harmonic cancellation transformers

n I-line output distributionn High impedance and low

inrush transformersn High resolution, color LCD

paneln Multiple 42-pole output

power panels

STS-PDU-I

Basic SpecificationsElectrical Characteristics:Current Rating: 200, 400, 600, 800 AEfficiency: 97% nominalInput: 480, 600 VAC, 3-ph, 3 or 4 W, 60 Hz 380, 400 VAC, 3-ph, 4 W, 50 HzOutput: 208/120 VAC, 3-ph, 4 W, 50 - 60 Hz 380, 400 VAC, 3-ph, 4 W, 50 Hz

Operational Characteristics:Sense Time: Less than 2 ms upon loss of souurceSense & Transfer Time: 1/4 cycle upon loss of sourceRS-485 Port: Offers remote status & operation accessUser Adjustable Settings: Overvoltage Undervoltage Retransfer ON/OFF Retransfer delay time Phase Angle Error Transfer Delay (optional) Transfer Inhibit (overload)

Panel Indicators: Summary Alarm Source 1 Active Source 2 Active Source 1 Preferred Source 2 Preferred Auto Retransfer On Auto Retransfer Off Load Power On Breaker StatusPanel Controls: Fault Reset Lamp Test Auto Retransfer On Auto Retransfer Off Select Source 1 Select Source 2 Control EnableMetering: Input V, I, kVA, kW, PF Output V, I, kVA, kW, PF

Environmental Specifications:Operating Temperature Range: 0°C to 40°CRelative Humidity: 0% to 95% noncondensing

Physical Specifications:Output Dimensions (in/mm) weight Rating H x W x D lbs/kg) 400A 88/224 x 96/244 x 34/87 4400 / 2000

600A 88/224 x 96/244 x 34/87 5200 / 2363

800A 88/224 x 116/295 x 34/87 6300 / 2864

Dedicated logic provides the fastest and most reliable operation for the critical switching functions, while the microprocessor attends to system level functions.

Power Systems Group901 E. Ball RoadAnaheim, CA 92805-5916 U.S.A.(800) 777-4638 Fax: (714) 956-7903E-mail: infopscs@L-3Com.comhttp://www.L-3Com.com/PSCS.html

© Copyright, L-3 Communications/SPD Technologies. All rights reserved. Appropriate for public release as defined in EAR Part 734.7(a). BN1214925 10/02 Qty: 1.5M Printed in U.S.A

Standard Control Panel

STATIC TRANSFER SWITCH

SOURCE 1 SOURCE 2

SETPOINT CONTROLSOFTWARE

RS 485 PORT

TO CRITICAL LOAD

REMOTEINPUT/OUTPUT

Control Panel

Control Panel

Microprocessor

Volt/Amp/Freq Sense

Dedicated Logic

Volt/Amp/Freq Sense

B U L L E T I N 9 2 5

Specifications subject to change without notice.

STS-PDU

16.25

13.88

REDUNDANT POWER CENTER