Precision Power Center - cfconsult.net

1 POWERCONVERSION/DISTRIBUTIONP recision Power CenterTECHNICAL DATA MANUALT hree Phase15-225 kVA50 & 60 HziTable of ContentsNO-COMPROMISE Power DISTRIBUTION AT LOWER INSTALLED COST .. 1 LIEBERT PACKAGED Power SYSTEM ADVANTAGES COMPARED TO CONVENTIONAL,BUILT-UP SYSTEMS .. 2 CAPACITIES AND CONFIGURATIONS.. 3 STANDARD FEATURES FOR ALL SYSTEMS.. 5 Panelboards .. 5 ADDITIONAL FEATURES FOR ALL SYSTEMS .. 6 HARMONICS SOLUTIONS .. 8 SYSTEM MONITORING .. 8 Power Monitor Panel .. 8 Remote Monitoring Systems .. 9 PHYSICAL/ELECTRICAL DATA .. 10 HEAT OUTPUT.. 12 SYSTEM SIZING.. 13 SERVICE ACCESS AND CLEARANCE REQUIREMENTS .. 14 FiguresFigure 1 Conventional built-up system.

2 1 Figure 2 Liebert Precision Power Center .. 1 Figure 3 Liebert Precision Power Center Top exit .. 1 Figure 4 Precision Power Center , 1-4 panelboards .. 3 Figure 5 Top exit Precision Power Center , 1-2 panelboards.. 4 Figure 6 Precision Power Center diagram .. 4 Figure 7 Dimensions, clearances, 1 panelboard .. 14 Figure 8 Dimensions, clearances, 2 panelboards .. 14 Figure 9 Dimensions, clearances, 3 panelboards .. 15 Figure 10 Dimensions, clearances, 4 panelboards .. 16 Figure 11 Dimensions, clearances, Top exit unit .. 17 TablesTable 1 Features available by model.. 7 Table 2 Electrical and mechanical characteristics, 60 Hz .. 10 Table 3 Electrical and mechanical characteristics, 50 Hz.

3 11 Table 4 Electrical and mechanical characteristics, Top exit .. 12 Table 5 Heat output .. 12iiNo-Compromise Power Distribution at Lower Installed Cost1NO-COMPROMISE Power DISTRIBUTION AT LOWER INSTALLED COSTL iebert Precision Power Centers offer distribution, computer-grade grounding, and monitoring. Unlike con-ventional built-up systems, these Liebert packaged Power systems provide easy low-cost installation, simple relocation, security, proven design and performance, electrical isolation, and effective noise 1 Conventional built-up systemFigure 2 Liebert Precision Power CenterFigure 3 Liebert Precision Power Center Top ExitInputCircuitBreakerOutputCircuitBrea kerIsolation Transformer4-wire208/120 VPower Panels with RigidConduit DistributionREPOC ircuitBreakerREPOP ower Panels with Flexible Interconnecting CablesControl J-BoxPower J-BoxCircuitBreakerREPOTop exit Precision Power CenterLiebert Packaged Power System Advantages Compared to Conventional, Built-Up Systems2 LIEBERT PACKAGED Power SYSTEM ADVANTAGES COMPARED TO CONVENTIONAL.

4 BUILT-UP SYSTEMSD esirable FeaturesConventional Built-Up SystemsLiebert Packaged Power SystemProven SystemDesignNo. Each site is a one-of-a-kind installation. Design depends on engineer and Liebert Power systems are complete, proven-design, factory tested to ensure consistent performance. Designed-in distribution flexibility accommodates all installation ApprovedNot as a system. Even though listed components may be used, site-fabricated distribution is subject to acceptance by local inspecting UL listing as a complete system is an assurance of TestedNo. Testing of performance is done at the site, if at Factory testing the complete system ensures performance and safety of the QualityImprovementDoubtful.

5 Because of the variables in design and installation, site-fabricated distribution does not consistently offer computer-grade Power isolation or ground Because packaged Power systems have shielded isolation transformers close to the load, they offer Power line noise attenuation and controlled Since site-fabricated distribution seldom includes an isolation transformer in the computer room, a local single point ground system that minimizes common mode disturbances is difficult to The packaged Power system with isolation transformer automatically establishes a local single-point ground for the critical load. The Power grounding point is the same as the computer system grounding point, minimizing common mode DistributionPossibly.

6 Only if the entire distribution panel is dedicated to the computer and the panel is in the computer Power distribution panel is in the computer room. Access is limited to authorized IdentificationPossibly. Circuit number and receptacle references might be supplied, depending on the installing electrician and available Identification tags adjacent to each circuit breaker provide circuit identification and description of load served. Each cable is tagged with circuit number and cable Some add-on monitoring systems are available, but monitoring also depends on the installing electrician and available Built-in Power parameter monitoring, alarm, and control capabilities are standard in packaged Power of InstallationNo.

7 All site-fabricated distribution wiring becomes part of premises A packaged system requires only a single connection to the premises SystemExpansionNo. Conduit installation and wire pulling is time-consuming, and can hamper operations while in New cable(s) can be routed quickly with minimal SystemRearrangementNo. Site-fabricated distribution cannot be easily rearranged. Old conduit and wiring must be removed and new installed. Yes. Even after major equipment rearrangement, redistributing Power from packaged systems becomes a simple matter of re-routing the flexible interconnecting To MoveNo. New distribution must be built at the new site and old conduit and wiring usually must be removed from the former The package is easily moved with the computer system to the new and Configurations3 CAPACITIES AND CONFIGURATIONSL iebert packaged Power systems provide isolation, monitoring control, conditioning, and local single-point ground to ensure computer-grade sizes ranging from 15 kVA to 225 kVA in a wide variety of configurations, the Liebert packaged distribu-tion and conditioning systems can meet the requirements of almost any 4 Precision Power Center , 1-4 panelboards15-30 kVA, 1 panelboard50-225 kVA, 4 panelboards50-225 kVA.

8 3 panelboards 50-125 kVA, 2 panelboardsCapacities and Configurations4 Figure 5 Top exit Precision Power Center , 1-2 panelboardsFigure 6 Precision Power Center diagram15-30 kVA, 1 panelboard50-225 kVA, 2 panelboardsHigh Voltage J-BoxLow Voltage J-BoxSurge ArresterInput Circuit BreakerRemoteMonitoringSystemMonitoringa ndControlSingle PointGroundSpikeSuppression ModuleLocal DisplaySubfeed Output BreakerMainCircuit BreakerMainCircuit BreakerOutputPanelboardOutputPanelboardS hielded Isolation TransformerStandard Features for All Systems5 STANDARD FEATURES FOR ALL SYSTEMSAll Liebert distribution and conditioning systems incorporate standard features that ensure load pro-tection and simplify Power Centers use quality, dry type, shielded isolation transformers for noise reduction up to 120 dB, with harmonic voltage distortion of percent.

9 Depending on kVA capacity, output impedance is between 3 and percent, while full-load efficiency is between and 98 transformer has temperature sensors in the windings to provide an alarm if internal temperature exceeds 180 C. It will shut down the system if inter-nal temperature exceeds 200 C. Full Class H 220 C transformer insulation and all copper windings are used for long life and efficient main input circuit breaker provides either manual control, or automatic shutdown of the system in the event of an overcurrent condition. The breaker is sized for 125 percent of the system input full load amperes. In addition to manual and thermal-mag-netic trip, the input breaker can be tripped by an electrically actuated shunt trip mechanism.

10 As a standard feature, the shunt trip of the input circuit breaker is activated by the 200 C temperature sen-sor, local Emergency Power Off switch, and Manual Restart local Emergency Power Off (EPO) switch is an illuminated push button, easily accessible for emer-gency shutdown, but fully guarded by a hinged cover to prevent accidental manual restart circuit shunt-trips the main input breaker whenever input Power fails. This iso-lates the system from repetitive Power applications during fault-clearing operations by the utility, and allows an orderly restart of the system when normal Power manual restart circuit can be disabled by the manual restart select switch.