Emerson 480V user manual Cable Connections, Input and output busbars

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Electrical Connections

2.1.4Cable Connections

The rectifier input, bypass and output are easily accessible from the front of the unit for installation. All require lug type terminations. They are connected to busbars on the front side of the Liebert NX and below the circuit breaker, as shown in Figure 4. These busbars are accessible when the front side panel is removed. Busbars to connect external batteries are accessible from the front of the UPS.

NOTE

External connection access requires removal of a protective panel on the lower front of the UPS.

Figure 4 Input and output busbars

Battery Input

Connections

Rectifier Input Busbars (Phases are indicated by

letters below the

bars)

Bypass Input Busbars (Phases are indicated by letters below the bars)

NOTE

Output Busbars (Phases are indicated by letters below the bars)

Ground

Busbar

There is no battery fuse in the UPS; the battery cabinet must include a circuit breaker to cut off the current in case of short circuit. Refer to Table 8 for current ratings.

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Contents Liebert NX UPS Page Table of Contents Operator Control and Display Panel UPS SpecificationsOptions Operating Instructions Pop-Up WindowsSpecifications and Technical Data Appendix a UPS Status MessagesTables Page Important Safety Instructions Battery Cabinet Precautions Glossary of Symbols Installation External InspectionsUPS Location Internal InspectionsPreliminary Checks Battery Location Considerations in Moving the Liebert NXMechanical Considerations Special Considerations for Parallel SystemsFloor Installation ClearancesCable Entry System CompositionCabinet arrangement-Liebert NX units and battery cabinets UPS Lug Size and Torque Requirements Power CablingCable Rating UPS Input Configuration Cabling GuidelinesCable Connections Input and output busbarsUPS Rectifier and Bypass Input Supply Safety GroundProtective Devices Cabling Procedure Output System Connections-Ensure Correct Phase RotationCommon Input Connections Dual Input ConnectionsControl Cables Frequency Converter ModeMonitor Board Features Dry Contacts Maintenance Bypass Cabinet Interface Maintenance bypass cabinet interfaceInput Dry Contacts Input dry contacts atBCB Control Interface BCB control interfaceInverter mode relay center Main input fault relay centerOutput Dry Contacts Output dry contact relaysIndicates Pin EPO Input-OptionalEPO input contact relays Safety IntroductionExternal Battery Cabinet Installation Battery CabinetsInsulated Post Tray Handle For Cabling Connecting the BatteriesInstallation Considerations BCB Shunt Trip Connecting the Battery Cabinet to the UPSNon-Standard Batteries This power must be UPS protected Alber Monitoring System-OptionalLBS Cable and Settings Load Bus SynchronizationPerformance Requirements LBS CableGeneral Configuring Parallel System OperationFeatures of Parallel System Operation Modes Summary Installing Parallel SystemOperating Principles Redundancy Paralleling Cabinet Installation Power CablesConditions for Parallel System Preliminary ChecksCables InterconnectingAuxiliary Dry Contact Cables To Load Q1Ext Q2ExtQByp Normally Open EPO Normally Closed EPOUPS Mechanical Characteristics Environmental characteristicsUPS mechanical characteristics Conformity and StandardsUPS Electrical Characteristics UPS terminalRectifier input power Liebert approved replacement batteriesRated Power kVA 100 120 Battery Manufacturer Models SuppliedBypass Input DC Intermediate CircuitInverter Output Left Side GND Left Side View Front View Max. Door Swing U3819205 530628 Pg , Rev BattExt Auxiliary Contacts External Battery CabinetBattery Breaker Top Top Front Right Side Front Rear SystemRear FRONTOutput Run From Conductors Ph A, B, C System Input Ph A, B, C UPS InputsPh A, B, C UPS Outputs AC OutputGround UPS Utility UPS #1-UPS #4 Module AC Ph A, B, C UPS InputsPh A, B, C System Outputs Isometric View U3819301Single module block diagram dual input configuration General DescriptionNormal Mode Battery ModeBypass Mode Bypass SuppliesMaintenance Mode Parallel Redundancy Mode System ExpansionOperator Control Panel Display Panel LayoutMimic indicators Control buttons Navigation keys Detailed view of control panelMimic Display Indicators Mimic display status indicatorsControl Buttons Control buttonsAudible Buzzer LCD OverviewNavigation Keys UPS System InformationIcons for navigation keys Description of items in UPS system windowLCD Menus and Data Items Descriptions of UPS menus and data window items Menu Type Item Type ExplanationMains InputTests Start/stop BatteryLanguage Selection Current Date and Time Set date and timeUPS Status Messages Current status and history log recordsOpening Display Default ScreenTypes of LCD Screens UPS Help Screen Screen Saver WindowPop-Up Windows Liebert NX Operating Modes UPS operating modesCircuit Breakers Circuit breakersUPS Startup Startup ProcedureIndicator State Switch from Normal Mode to Bypass Mode Switch from Bypass Mode to Normal ModeMaintenance Bypass Procedure and Powering Down the UPS Auto Restart Emergency Shutdown With EPOBattery Protection Multi-Module System ProceduresBattery Undervoltage Pre-Warning Battery End-of-Discharge EOD ProtectionTie breaker Inserting One Module into a Multi-Module System LED Function StatusShutdown Procedure-Complete UPS and Load Shutdown Commissioning a Parallel SystemParallel System Start Up Power Output Communication and Other User TerminalsAnalog Input Interface Liebert IntelliSlot CommunicationSee 10.1.5 Configuring Liebert NX communication optionsComments Baud RatesConfiguring Baud Rates Liebert IntelliSlot Web card display Relay Card pin configuration Relay card jumper configurationRelay Card Pin Function OperationPin Description MultiPort 4 CardAssignment Replacing Dust Filters Remote Alarm MonitorLBS Mode-Load Bus Synchronization Torque specifications Battery torque ratingLug Size and Torque Requirements Cable Lengths Floor to Connection Point Inside UPSDistance to connection points on the Liebert NX UPS Parallel system current tableLead/Lag ratings External cabinet dimensions, including side panelsCable size and tightening torques 250 10 N*m Battery Run Times Estimated battery run time, minutesEvent Message Description / Suggested Action if any Services at 800-543-2378 for assistanceUPS status messages High ambient air temperature Bypass voltage is beyond the normal rangeBypass voltage exceeds the limit Software according to the customer’s agreementError can also leads to the alarm Alarm if applicableInverter STS Fail Condition is removedEmergency Power Off EPOUPS status messages UPS Status Messages Page Ne t ItiTi 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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