Emerson 480V user manual General Description, Single module block diagram dual input configuration

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Operation

7.0OPERATION

7.1General Description

Liebert’s NX provides continuous, high-quality AC power to your business-critical equipment, such as telecommunications and data processing equipment. The Liebert NX UPS supplies power that is free of the disturbances and variations in voltage and frequency common to utility power, which is subject to brownouts, blackouts, surges and sags.

The Liebert NX utilizes the latest in high-frequency, double-conversion pulse width modulation tech- nology and fully digital controls to enhance its reliability and increase the ease of use. Specifically, the Liebert NX 480V utilizes soft-switching technology to greatly enhance efficiency.

As shown in Figure 38, the AC utility source is input at CB1 and the rectifier converts the AC utility into DC power. The inverter converts that DC power from the utility—or DC power from the batter- ies—into AC power for the load. The batteries power the load through the inverter in the event of a power failure. The utility source can also power the load through the static bypass.

If maintenance or repair of the UPS is necessary, the load can be switched without interruption in service to the maintenance bypass.

Figure 38 Single module block diagram (dual input configuration)

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Contents Liebert NX UPS Page Table of Contents Options UPS SpecificationsOperator Control and Display Panel Pop-Up Windows Operating InstructionsAppendix a UPS Status Messages Specifications and Technical DataTables Page Important Safety Instructions Battery Cabinet Precautions Glossary of Symbols External Inspections InstallationPreliminary Checks Internal InspectionsUPS Location Considerations in Moving the Liebert NX Battery LocationMechanical Considerations Special Considerations for Parallel SystemsClearances Floor InstallationCable Entry System CompositionCabinet arrangement-Liebert NX units and battery cabinets UPS Cable Rating Power CablingLug Size and Torque Requirements Cabling Guidelines UPS Input ConfigurationInput and output busbars Cable ConnectionsProtective Devices Safety GroundUPS Rectifier and Bypass Input Supply Output System Connections-Ensure Correct Phase Rotation Cabling ProcedureCommon Input Connections Dual Input ConnectionsMonitor Board Features Frequency Converter ModeControl Cables Dry Contacts Maintenance bypass cabinet interface Maintenance Bypass Cabinet InterfaceInput Dry Contacts Input dry contacts atBCB control interface BCB Control InterfaceMain input fault relay center Inverter mode relay centerOutput Dry Contacts Output dry contact relaysEPO input contact relays EPO Input-OptionalIndicates Pin Introduction SafetyBattery Cabinets External Battery Cabinet InstallationInstallation Considerations Connecting the BatteriesInsulated Post Tray Handle For Cabling Non-Standard Batteries Connecting the Battery Cabinet to the UPSBCB Shunt Trip Alber Monitoring System-Optional This power must be UPS protectedLoad Bus Synchronization LBS Cable and SettingsPerformance Requirements LBS CableFeatures of Parallel System Configuring Parallel System OperationGeneral Operating Principles Redundancy Paralleling Installing Parallel SystemOperation Modes Summary Power Cables Cabinet InstallationConditions for Parallel System Preliminary ChecksAuxiliary Dry Contact Cables InterconnectingCables QByp Q1Ext Q2ExtTo Load Normally Closed EPO Normally Open EPOEnvironmental characteristics UPS Mechanical CharacteristicsUPS mechanical characteristics Conformity and StandardsUPS terminal UPS Electrical CharacteristicsLiebert approved replacement batteries Rectifier input powerRated Power kVA 100 120 Battery Manufacturer Models SuppliedInverter Output DC Intermediate CircuitBypass Input Left Side GND Left Side View Front View Max. Door Swing U3819205 Ext Batt530628 Pg , Rev Battery Breaker External Battery CabinetAuxiliary Contacts Top Top Front Right Side System Front RearRear FRONTOutput Run From Conductors Ph A, B, C UPS Inputs Ph A, B, C System InputPh A, B, C UPS Outputs AC OutputPh A, B, C System Outputs Utility UPS #1-UPS #4 Module AC Ph A, B, C UPS InputsGround UPS U3819301 Isometric ViewGeneral Description Single module block diagram dual input configurationBattery Mode Normal ModeBypass Mode Bypass SuppliesParallel Redundancy Mode System Expansion Maintenance ModeDisplay Panel Layout Operator Control PanelDetailed view of control panel Mimic indicators Control buttons Navigation keysMimic display status indicators Mimic Display IndicatorsControl buttons Control ButtonsLCD Overview Audible BuzzerUPS System Information Navigation KeysIcons for navigation keys Description of items in UPS system windowLCD Menus and Data Items Menu Type Item Type Explanation Descriptions of UPS menus and data window itemsMains InputLanguage Selection Start/stop BatteryTests Set date and time Current Date and TimeCurrent status and history log records UPS Status MessagesTypes of LCD Screens Default ScreenOpening Display Screen Saver Window UPS Help ScreenPop-Up Windows UPS operating modes Liebert NX Operating ModesCircuit breakers Circuit BreakersIndicator State Startup ProcedureUPS Startup Switch from Bypass Mode to Normal Mode Switch from Normal Mode to Bypass ModeMaintenance Bypass Procedure and Powering Down the UPS Emergency Shutdown With EPO Auto RestartMulti-Module System Procedures Battery ProtectionBattery Undervoltage Pre-Warning Battery End-of-Discharge EOD ProtectionTie breaker LED Function Status Inserting One Module into a Multi-Module SystemCommissioning a Parallel System Shutdown Procedure-Complete UPS and Load ShutdownParallel System Start Up Communication and Other User Terminals Power OutputAnalog Input Interface Liebert IntelliSlot CommunicationLiebert NX communication options See 10.1.5 ConfiguringComments Baud RatesConfiguring Baud Rates Liebert IntelliSlot Web card display Relay card jumper configuration Relay Card pin configurationRelay Card Pin Function OperationAssignment MultiPort 4 CardPin Description LBS Mode-Load Bus Synchronization Remote Alarm MonitorReplacing Dust Filters Battery torque rating Torque specificationsLug Size and Torque Requirements Cable Lengths Floor to Connection Point Inside UPSParallel system current table Distance to connection points on the Liebert NX UPSCable size and tightening torques External cabinet dimensions, including side panelsLead/Lag ratings 250 10 N*m Estimated battery run time, minutes Battery Run TimesUPS status messages Services at 800-543-2378 for assistanceEvent Message Description / Suggested Action if any Bypass voltage is beyond the normal range High ambient air temperatureBypass voltage exceeds the limit Software according to the customer’s agreementAlarm if applicable Error can also leads to the alarmInverter STS Fail Condition is removedEPO Emergency Power OffUPS status messages UPS Status Messages Page Iti Ne tTi n That
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480V specifications

The Emerson 480V power systems play a critical role in modern industrial applications, providing reliable and efficient power distribution. These systems are designed for facilities that require robust performance and operational efficiency while adhering to safety regulations. With voltage ratings at 480V, they cater primarily to industries such as manufacturing, data centers, and commercial buildings.

One of the main features of the Emerson 480V systems is their scalability. These systems can be easily adapted and expanded as operational demands grow, thereby reducing initial investment costs and providing a flexible solution for evolving business needs. This ability to scale is crucial in a fast-paced environment where demands can change rapidly.

The Emerson 480V systems also incorporate advanced technologies for improved performance and safety. One key technology is the use of smart grid solutions. This enables real-time monitoring, diagnostics, and control, allowing facility managers to optimize energy consumption and reduce operational costs. Furthermore, these systems often include integrated protection devices that enhance safety measures by minimizing the risk of electrical faults, overloads, or short circuits.

Energy efficiency is another characteristic that distinguishes Emerson 480V systems from traditional alternatives. With advanced power management features, these systems effectively reduce energy waste and lower electricity bills. Emerson’s commitment to sustainability is evident in its designs, which aim to minimize environmental impact through energy-efficient technologies.

The build quality of Emerson 480V systems is also noteworthy. They are designed to withstand harsh industrial environments and are constructed with high-grade materials that promote longevity and reliability. The modular design allows for easy maintenance and repair, which further extends the lifespan of the system.

Additionally, Emerson 480V systems are equipped with user-friendly interfaces that facilitate ease of operation. This ensures that operators can efficiently manage and control power distribution without extensive training. The combination of performance, scalability, safety features, and user-centric design makes Emerson 480V systems an ideal choice for businesses looking to enhance their electrical infrastructure.

In summary, Emerson 480V power systems are a leading solution for industrial power distribution, characterized by their scalability, smart technology integration, energy efficiency, robust build quality, and user-friendly operation. These attributes make them a valuable investment for any organization aiming to improve its electrical management and operational performance.
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