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AC Power
™
For Business-Critical Continuity
®
Liebert STS2 Static Transfer Switch2
The Cornerstone of High-Availability Power Systems
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The Power to Protect Your Critical Operations For maximum availability applications, the Liebert Static Transfer Switch2 (STS2) 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. Liebert is the market leader in dual-bus power systems, building the world’s most reliable UPS and Static Transfer Swit
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True Front-Access Design All mechanical and electronic components of the Liebert STS2 are accessible from the front of the unit for installation and service—no side or rear access required. This gives you several immediate benefits: Greater freedom in system design. The Liebert STS2 can be placed adjacent to or in back of other equipment. It can also be placed against a wall or partition. Simplified installation, with ample space for cable connections through top and bottom access plates. Less
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Optimized Transfer Option Enhances Cost-Efficient System Operation Liebert offers a patented optimized transfer option for the Liebert STS2 that greatly improves operation when used in primary side switching applications. Figure 1 Standard STS2 transfer Figures 1 and 2 show results for the standard STS2 vs. the optimized STS2 load voltages for the same condition (alternate source lags 120 degrees) respectively. The optimized transfer transformer fluxes control algorithm minimizes the transform
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Figure 2 Optimized STS transfer Liebert’s transfer control does more than balance the flux. Due to our unique approach to the optimized transfer algorithm, transfer time should not be the only performance measure for this new optimized switch. Liebert’s method, whenever possible, also seeks to minimize voltage disturbances while maintaining transformer flux balance. It takes both voltage disturbance and volt-second balance into consideration. Liebert has a unique flux balance algorithm that d
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Liebert STS2 Communication and Product Options Options and Accessories Liebert STS2 has a wide choice of monitoring and communications options to keep you connected to your Seismic Anchors — To ensure stability for the unit in the event of seismic activity, anchors are available for securing the unit to critical power protection system. a concrete floor to meet seismic Zone 4 requirements. Seismic Floor Stand — Designed to level the unit and provide RS-232 Terminal Port — Standard on all units,
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Critical Space Support from Emerson Network Power Service Total Service Capability Remote Monitoring — Always There, Always Alert Emerson Network Power Service provides a Basic, Essential and The key to providing proper service for your critical power systems is being aware of Preferred level of maintenance and service that allows you to that equipment’s operating status at any given time. For customers who need to have select the complement of critical power system services that these vital pro
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Ensuring The High Availability Of Mission-Critical Data And Applications. Liebert Corporation Specifications 1050 Dearborn Drive P.O. Box 29186 1 Heat Uncrated Dimensions Uncrated Shipping Dimensions Shipping Columbus, Ohio 43229 1 Amp Output (WxDxH) Weight (WxDxH) Weight 800 877 9222 Phone (U.S. & Rating (KW) (inches) (mm) (lbs) (kg) (inches) (mm) (lbs) (kg) Canada Only) 614 888 0246 Phone (Outside U.S.) 100 0.8 30x32x77 762x813x1956 780 354 48x44x82 1016x1194x2082 880 399 614 841 6022 FAX
