Liebert LTS
T he Cornerstone of High-Availability Power Systems
AC Power Systems for
Business-Critical Continuity
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Tel: +852-2690-4118

We’re Emerson Network Power , backed by Emerson, a global company that brings technology and engineering together to provide innovative solutions for the benefit of our customers.
We’re the world leader in providing Business-Critical Continuity ™ to organizations like yours, enabled by our product and service centres of expertise.
Liebert is the market leader in dual-bus power systems, building the world’s most reliable
UPS and Static Transfer Switch products.
For maximum availability applications, the Liebert LTS solution provides an automatic, seamless transfer of your business-critical loads between outputs of two independent UPS
Systems in a dual-bus power configuration.

The Power to Protect
Your Critical Operations
Triple logic redundancy for uninterrupted power control.
Liebert LTS Solution, with solid-state digital bus transfer, further extends the market leadership with design benefits unmatched by com petitive products.
• 100% rated, fuseless design
• Flash memory enables firmware updates while
supporting critical loads
• Easily replaceable control/power assembly on units up to 400A
to allow maintenance, service, or full replacement
• True Internal Triple Redundancy of the logic DSP
(Digital Signal Processing)
• Internal Dual-Bus Control Power, with two power supplies
• Input Surge Protection
Product Overview
The Liebert LTS Solution enables the technology behind dual-bus power systems.
A Static Transfer Switch can be connected between the critical load and the outputs of two independent power sources.
If the primary should fail, the switch will automatically transfer the load to the surviving source.
One-Line Diagrams

The solution for your configuration
True Front-Access Design: all mechanical and electronic components are accessible
from the front of the unit. For installation and service no side or rear access is required.
Optimized Transfer Option: eliminates downstream transformer inrush saturation
(patented algorithm), and greatly improves operation when used in primary side
switching applications.
Figure 1 Standard LTS transfer
Transformer Fluxes Transformer Fluxes
Primary Currents Primary Currents
Figures 1 and 2: Show results for the standard HiSwitch2 vs. the optimized HiSwitch2 for the same condition (alternate source lags 120 degrees) respectively. The optimized transfer control algorithm minimizes the transformer saturation current resulting from an out of phase transfer.

Uninterrupted Power for
Uninterrupted Business Operations
Optimized Transfer Option enhances Cost-Efficient System Operation
Top and bottom cable entry: no additional cabinet required and no additional cost
Plug in optional boards to enhance your system reducing the initial cost
System Configuration with Optional Output Isolation Transformer
Large LCD Display
The Liebert LTS provides excellent local communications through its LED-based mimic diagram and LCD panel.
While the mimic shows the live power path, the back-lit contrast-adjusting LCD provides you with detailed data on the unit through a user-friendly menu.
System Configuration with Optional Intput Isolation Transformer
**Built-in Optional Transformers for 63A &
100A only.

Liebert LTS Solution has a wide choice of monitoring and communications options to keep you connected to your critical power protection system.
Communications
• RS-232 Terminal Port (Standard)
• RS-232 / RS-485 MOD Bus Protocol (Standard)
• SNMP hardware and software provides a connectivity
to TCP/IP-Based network (Optional)
• The Liebert LTS is capable of providing up to five relay outputs,
customizable eight analogue inputs and eight relay outputs (optional).
Dual Bus System Configuration

Ensuring The High Availability of
Mission-Critical Data And Applications
Technical Specifications
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Emerson Network Power
Enabling Business-Critical
Continuity™
We’re here to prepare you for the unknown, whatever comes your way, navigating with you through changing business environments and the uncharted demands they place on your technology infrastructure.
That’s what we mean by
Business-Critical Continuity™

Tel: +852-2690-4118
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Emerson Network Power, a business of Emerson (NYSE:EMR), is the global leader in enabling Business-Critical Continuity™.
The company is the trusted source for custom, adaptive and ultra-reliable solutions that enable and protect its customers’ business-critical technology infrastructures. Backed by the largest global services organization in the industry, Emerson
Network Power offers a full range of innovative power, precision cooling, connectivity and embedded products and services for computer, communications, healthcare and industrial systems. Key product brands within the Emerson Network Power family include Liebert, Knuerr, ASCO, Astec, Lorain.
Emerson Network Power.
The global leader in enabling business-critical
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