Introduction 7
1.2 Reliability
Reliabilityis the most important design goal for Uninterruptible Power Systems.Liebert Series 600 UPS systems
havedemonstrated reliability by achieving a field-proven criticalbus MTBF in excess of one million hours. In
addition,our Quality Assurance program is certified to the requirements of ISO 9001 standards.
LiebertLarge UPS systems are ETL listed to the requirements of UL 1778.All equipment and components are
manufacturedto applicable UL, NEC,NEMA, ANSI, IEEE, and CSA standards and guidelines.

Designed for Success

Thekeys to reliability in the design of the UPS systemare using conservatively rated components,minimizing
transfersto bypass, making operator controls understandable, and providing easyaccess for maintenance and
repair.Liebert UPS systems lead theindustry in all these areas.
Forexample, the Series 600T can clear substantial overloads through the solid statestatic bypass switch without
transferringto the bypass source. By minimizing transfersto bypass, the Series 600T minimizes operationof c ir-
cuitbreakers and enhances system reliability.
Asanother example, the system control logic has been packaged into Application-SpecificIntegrated Circuits
(ASICs)to eliminate the failure-prone discrete logic boardsused in other brands of UPS products. Furthermore,
theseASICs are isolated from heat-generating components to ensure optimaloperating temperatures.

Other Factors to Consider

Reliabilitydepends on more than just UPS moduledesign. Improper installation can causeany system to fail. To
preventthis, Customer Engineers from Liebert Global Services thoroughlyinspect the installation of all our sys-
temsto ensure they are installed properly and operating within performancespecifications.
Oncea UPS is properly installed, you—the on-site equipment operator—arethe most important factor in pre-
ventingcritical bus failures or unplanned transfers tobypass. To make your task easier, theSeries 600T UPS pro-
videseasy-to-follow, prompted instructionson the industry’s largest operatordisplay screen.
Ifyou ever need help, call Liebert Global Services (24 hours a day at 1-800-543-2378). Yourattention to proper
installation,operation, and periodic maintenance willensure that your mission-critical operations receive the
bestpossible protection from electrical disturbances and outages.
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