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We’re Emerson Network Power, backed by Emerson, a global
company that brings technology and engineering together to
provide innovative solutions for the bene»t 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
con»guration.
One-Line Diagrams
Flexibility
The solution for your con»guration
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
Figure2 2Optimized
OptimizedHiSwitch2
LTS transfer
Figure
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.
Large LCD Display
For TN A.C. wiring system application (neutral solidly grounded): Separately derived input sources shall present neutrals referenced
to the same Earth potential. Alternatively, an isolation transformer shall be fitted to at least one of the input sources instead.
**Built-in Optional Transformers for 63A &
100A only.
Communications and Product Options
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 »ve relay outputs,
customizable eight analogue inputs and eight relay outputs (optional).
Dual Bus System Configuration
Technical Specifications
Emerson Network Power
Enabling Business-Critical
Continuity™
That’s what we mean by
Business-Critical Continuity™
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