Emerson 10-30kVA installation manual Power Cabling, Cable Rating, Lug Size and Torque Requirements

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Electrical Connections

2.0ELECTRICAL CONNECTIONS

The UPS requires both power and control cabling once it has been mechanically installed. All control cables must run separate from power cables in metal conduits or metal ducts that are electrically bonded to the metalwork of the cabinets to which they are connected.

! WARNING

Before connecting input power to the NX, ensure that you are aware of the location and operation of the overcurrent protection devices that connect the UPS input/bypass supply to the power distribution panel.

De-energize and lockout or tagout all incoming high- and low-voltage power circuits before installing cables or making any electrical connections.

2.1Power Cabling

2.1.1Cable Rating

The main factors affecting the choice and size of cable are voltage, current (also taking into account overcurrent), room temperature and conditions of installation of the cable.

The power cables of the system must be sized with respect to the following description:

•UPS input cables - The UPS input cables must be sized for the maximum input current, includ- ing the maximum battery recharge current, given in Table 10, with respect to the unit rating and the input AC voltage.

•UPS bypass and output cables - The bypass and output cables must be sized for the nominal output current, given in Table 10, with respect to the unit rating and the output AC voltage.

•Battery cables - Each UPS unit has its own internal batteries factory-wired. If connecting an external battery cabinet, the battery cables must be sized for the battery discharge current at the end-of-discharge voltage, as given in Table 10, with respect to the unit rating.

NOTE

Table 10 gives nominal currents for determining the size of UPS power cables. Other important factors to consider include cable route length and coordination with protective devices.

The power cables can be sized to suit the UPS unit rating according to Table 10.

Lug Size and Torque Requirements

Refer to Table 27 for lug size and torque requirements.

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Contents Liebert NX UPS Page Table of Contents Maintenance Bypass Cabinet UPS SpecificationsOptions Figures Tables Important Safety Instructions Battery Cabinet Precautions Glossary of Symbols Internal Inspections External InspectionsUPS Location Preliminary ChecksFinal Position Considerations in Moving the NXMechanical Considerations Special Considerations for 1+N Systems10-30kVA UPS Floor InstallationClearances Cable EntryMaintenance Bypass Cabinet LiebertOptional Cabinets Power Cabling Cable RatingLug Size and Torque Requirements Cabling Guidelines UPS Input ConfigurationInput busbars Cable ConnectionsSystem Output Safety GroundProtective Devices UPS Rectifier and Bypass Input SupplyDual Input Connections Cabling ProcedureOutput System Connections-Ensure Correct Phase Rotation Common Input ConnectionsInternal UPS Battery Connections Monitor Board FeaturesControl Cables Input Dry Contacts Dry ContactsBCB box interface Maintenance Bypass Cabinet InterfaceMaintenance bypass cabinet interface BCB Box InterfaceEPO input contact relays Output Dry ContactsEPO Input-Optional Firmware Before M200 Output dry contact relaysFirmware M200 or Later EPO wiring for firmware M200 or laterSafety IntroductionUPS Batteries Removable retainer Tray handle Insulated post for cabling External Battery Cabinet InstallationMatching Battery Cabinets Connecting the BatteriesTop cable entry Battery trays BCB plate and BCB Battery tray support Service shelfTop cable entry Batteries BCB plate Installation Considerations Ends of supports Battery tray supports attachTo interior surface of NX Front door note notchedNon-Standard Batteries Connecting the Battery Cabinet to the UPSNormal UPS Mode Bypass SwitchLocating the Cabinet Bypass ModeMaintenance Mode Cable InstallationInput/Output Wiring Power Cable InstallationMaintenance bypass control wire location Line up cabinets so that mounting holes are aligned Bolting Cabinets TogetherLBS Cable DBS Cable and SettingsLoad Bus Synchronization Performance RequirementsConfiguring Parallel System Operation Features of Parallel SystemGeneral Installing Parallel System Auxiliary Dry Contact Cables Power CablesInterconnecting Parallel Control Cables Parallel System Control CablesInput Distribution Normally Closed EPO Normally Open EPOCircuit Breaker Battery Circuit Breaker BoxAvailable battery circuit breaker boxes DimensionsBattery circuit breaker box connections Conformity and Standards UPS Mechanical CharacteristicsEnvironmental characteristics Mechanical characteristicsUPS terminal UPS Electrical CharacteristicsBattery Manufacturers and Models Input RectifierDC Intermediate Circuit Time Load Inverter OutputInverter output Bypass Input Bypass inputInstallation Drawings Dimensions -top and bottom views Cable connections Location of internal batteries Battery 417mm 186mm 687mmW503 to W502 W501 3pcs W500 18pcs W506 to W507 W510 to W511 W502 to W503W504 to W505 W511 to W510 W507 to W506 W509 to W508 W505 to W504 W508 to W509Liebert -supplied interconnect wiring Refer to for key to interconnectionRun From Conductors Maintenance Bypass interconnection Run From Conductors Cabinet Type Liebert-supplied interconnect wiringLineup detail-SlimLine distribution cabinet to NX Lineup detail-1+N Type a connection to NX Interconnect wiring-1+N Type a connection to NXLineup detail-1+N Type A1 connection to NX Interconnect wiring-1+N Type A1 connection to NXLineup detail-1+N Type B connection to NX Interconnect wiring-1+N Type B connection to NXLineup detail-1+N Type B1 connection to NX Interconnect wiring-1+N Type B1 connection to NXLineup detail-1+N Type C connection to NX Interconnect wiring-1+N Type C connection to NXLineup detail-1+N Type C1 connection to NX Interconnect wiring-1+N Type C1 connection to NXLineup detail-1+N Type D connection to NX Interconnect wiring-1+N Type D connection to NXUPS Lug Size and Torque Requirements Torque specificationsBattery torque rating Initial Torque Annual Torque Battery In-lb N-mMaintenance bypass cabinet electrical data single input Current CB Size aCurrent Rating a OCP CB Size a Current Rating a CB Size a Maintenance bypass cabinet electrical data dual inputMulti-module bypass cabinet electrical data 200A E00, FR0 208 104 125 250 400 MR1 208 280 400 222 300 210 250 167 225 140 175 111 150 Maintenance bypass cabinet lug sizes Battery cabinet physical characteristics Maintenance Bypass Cabinet weightsMaintenance Bypass Cabinet Style, lb. kg Rating Distance to connection points on the NX UPS Maintenance bypass cabinet dimensionsMulti-module paralleling cabinet dimensions Cable Lengths Floor to Connection Point Inside UPSSpecifications and Technical Data Specifications and Technical Data Page That NetIti Tin
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10-30kVA specifications

The Emerson 10-30 kVA, 208V uninterruptible power supply (UPS) solution is a robust system designed to provide reliable power protection for critical applications in commercial and industrial settings. This UPS is ideal for safeguarding IT equipment, communication systems, and other sensitive electronics against power disturbances and interruptions.

One of the standout features of the Emerson 10-30 kVA UPS is its modular design, allowing for flexibility and scalability. This means that as the power needs of a facility grow, the UPS can be easily expanded without requiring a complete system overhaul. This modularity contributes to a more efficient use of resources and minimizes operational costs.

The UPS also incorporates advanced technologies such as double-conversion online architecture, which provides the highest level of power quality. This technology ensures that the output power is consistently clean and stable, effectively eliminating harmful voltage fluctuations and frequency variations. Consequently, connected load receives a pure sine wave output, preventing potential damage or operational issues with sensitive equipment.

Another key feature is the high efficiency rating of the Emerson UPS, which exceeds 95 percent in typical operating conditions. This high efficiency translates to reduced energy costs and a smaller carbon footprint, aligning with modern sustainability goals. The cooling system is designed to be efficient as well, ensuring optimal performance while maintaining a compact footprint.

The user-friendly interface enhances operability, featuring an intuitive LCD display that allows for easy monitoring of critical power parameters. Users can access real-time data related to battery health, load levels, and operational status, which aids in effective management of the power supply.

Battery management is another critical aspect of the Emerson UPS. It employs advanced battery management technologies to ensure optimal battery life and performance. Features such as intelligent battery testing and monitoring help predict potential battery failures before they occur, allowing for proactive maintenance and minimized downtime.

In summary, the Emerson 10-30 kVA, 208V UPS offers a combination of modularity, high efficiency, advanced technologies, and effective power management features that cater to the demanding needs of critical applications. With its reliable performance and user-friendly operation, this UPS solution is an excellent choice for organizations looking to protect their valuable equipment from power disturbances.
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