Emerson 10-30kVA Safety Ground, Protective Devices, UPS Rectifier and Bypass Input Supply

Page 18

Electrical Connections

2.1.5Safety Ground

The safety ground busbar is located below the neutral input and output busbars as shown in Figure 5 below. The safety ground cable must be connected to the ground busbar and bonded to each cabinet in the system.

All cabinets and cable conduit should be grounded in accordance with local regulations.

! WARNING

Failure to follow proper grounding procedures can result in electric shock hazard to personnel or the risk of fire, should a ground fault occur.

NOTE

Proper grounding significantly reduces problems in systems caused by electromagnetic interference.

NOTE

The ground and neutral busbars are easily accessible when the left protective cover plate is removed. Cable connections should be made before a cabinet is attached to the left side of the NX or before the UPS is placed where another obstruction, such as a wall, is against the NX’s the left side.

Figure 5 Ground and neutral busbar connections

Output neutral busbar

OUTPUT

 

INPUT

NEUTRAL

 

NEUTRAL

 

 

 

Ground busbar

Input neutral busbar

2.1.6Protective Devices

For safety, it is necessary to install circuit breakers in the input AC supply and external battery bat- tery cabinets, external to the UPS system. Given that every installation has its own characteristics, this section provides guidelines for qualified installation engineers with knowledge of operating prac- tices, regulatory standards and the equipment to be installed.

UPS Rectifier and Bypass Input Supply

•Protection from excessive overcurrents and short circuits in power supply input

External overcurrent protection for the AC output circuit is to be provided. See 6.4 - UPS Elec- trical Characteristics and Table 12 for overload capacity.

High-speed fuses and SCRs are used for internal battery circuit overcurrent protection. When an external battery supply is used, overcurrent protection for the battery circuit is to be provided by the customer.

•Dual Input

When wiring the UPS with dual inputs, the Rectifier input and the Bypass input must be pro- tected separately. Size the breakers according to the input currents shown in Table 10.

System Output

When using an external distribution panel for load distribution, the output neutral and input neutral must be separated at the input to the UPS.

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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 External Inspections Internal InspectionsPreliminary Checks UPS LocationSpecial Considerations for 1+N Systems Considerations in Moving the NXMechanical Considerations Final PositionCable Entry Floor InstallationClearances 10-30kVA UPSMaintenance Bypass Cabinet LiebertOptional Cabinets Power Cabling Cable RatingLug Size and Torque Requirements UPS Input Configuration Cabling GuidelinesCable Connections Input busbarsUPS Rectifier and Bypass Input Supply Safety GroundProtective Devices System OutputCommon Input Connections Cabling ProcedureOutput System Connections-Ensure Correct Phase Rotation Dual Input ConnectionsInternal UPS Battery Connections Monitor Board FeaturesControl Cables Dry Contacts Input Dry ContactsBCB Box Interface Maintenance Bypass Cabinet InterfaceMaintenance bypass cabinet interface BCB box interfaceOutput dry contact relays Output Dry ContactsEPO Input-Optional Firmware Before M200 EPO input contact relaysEPO wiring for firmware M200 or later Firmware M200 or LaterSafety IntroductionUPS Batteries Connecting the Batteries External Battery Cabinet InstallationMatching Battery Cabinets Removable retainer Tray handle Insulated post for cablingTop cable entry Battery trays BCB plate and BCB Battery tray support Service shelfTop cable entry Batteries BCB plate Installation Considerations Front door note notched Battery tray supports attachTo interior surface of NX Ends of supportsConnecting the Battery Cabinet to the UPS Non-Standard BatteriesBypass Switch Normal UPS ModeCable Installation Bypass ModeMaintenance Mode Locating the CabinetPower Cable Installation Input/Output WiringMaintenance bypass control wire location Bolting Cabinets Together Line up cabinets so that mounting holes are alignedPerformance Requirements DBS Cable and SettingsLoad Bus Synchronization LBS CableConfiguring Parallel System Operation Features of Parallel SystemGeneral Installing Parallel System Parallel Control Cables Parallel System Control Cables Power CablesInterconnecting Auxiliary Dry Contact CablesInput Distribution Normally Open EPO Normally Closed EPODimensions Battery Circuit Breaker BoxAvailable battery circuit breaker boxes Circuit BreakerBattery circuit breaker box connections Mechanical characteristics UPS Mechanical CharacteristicsEnvironmental characteristics Conformity and StandardsUPS Electrical Characteristics UPS terminalBattery Manufacturers and Models Input RectifierDC Intermediate Circuit Bypass Input Bypass input Inverter OutputInverter output Time LoadInstallation Drawings Dimensions -top and bottom views Cable connections Battery 417mm 186mm 687mm Location of internal batteriesW505 to W504 W508 to W509 W501 3pcs W500 18pcs W506 to W507 W510 to W511 W502 to W503W504 to W505 W511 to W510 W507 to W506 W509 to W508 W503 to W502Liebert -supplied interconnect wiring Refer to for key to interconnectionRun From Conductors Maintenance Bypass interconnection Liebert-supplied interconnect wiring Run From Conductors Cabinet TypeLineup detail-SlimLine distribution cabinet to NX Interconnect wiring-1+N Type a connection to NX Lineup detail-1+N Type a connection to NXInterconnect wiring-1+N Type A1 connection to NX Lineup detail-1+N Type A1 connection to NXInterconnect wiring-1+N Type B connection to NX Lineup detail-1+N Type B connection to NXInterconnect wiring-1+N Type B1 connection to NX Lineup detail-1+N Type B1 connection to NXInterconnect wiring-1+N Type C connection to NX Lineup detail-1+N Type C connection to NXInterconnect wiring-1+N Type C1 connection to NX Lineup detail-1+N Type C1 connection to NXInterconnect wiring-1+N Type D connection to NX Lineup detail-1+N Type D connection to NXUPS Initial Torque Annual Torque Battery In-lb N-m Torque specificationsBattery torque rating Lug Size and Torque RequirementsMaintenance bypass cabinet electrical data single input Current CB Size aCurrent Rating a OCP CB Size a Maintenance bypass cabinet electrical data dual input Current Rating a CB Size aMulti-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 Cable Lengths Floor to Connection Point Inside UPS Maintenance bypass cabinet dimensionsMulti-module paralleling cabinet dimensions Distance to connection points on the NX UPSSpecifications and Technical Data Specifications and Technical Data Page Tin NetIti That
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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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