Emerson 10-30kVA, 208V Bypass Mode, Maintenance Mode, Locating the Cabinet, Cable Installation

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Maintenance Bypass Cabinet

4.3Bypass Mode

When the Maintenance Bypass Cabinet is in the Bypass mode, it provides an alternate path for power to the connected equipment. Should the UPS need to be taken out of service for limited maintenance or repair, manual activation of the bypass will cause an immediate transfer of the equipment from the UPS inverter to the bypass source. In this mode, power will still be supplied to the UPS; however, the load is NOT protected by the UPS.

4.4Maintenance Mode

When the maintenance bypass cabinet is in the Maintenance mode, it provides an alternate path for power to the connected equipment. Should the UPS need to be taken out of service for limited mainte- nance or repair. In this mode of operation, no power is supplied to the UPS and the load is NOT pro- tected by the UPS.

4.5Locating the Cabinet

This Maintenance Bypass Cabinet may be mounted to the left of the UPS or installed as a stand-alone unit. In either case, ensure that the unit is in a well-ventilated area and that there is clearance for access to the switches and cable connections as required by national and local codes.

4.6Cable Installation

4.6.1Wiring Preparation

Be sure that the unit is not connected to any AC utility power source or UPS before installing any wir- ing to this unit. This Maintenance Bypass Cabinet should be installed by a qualified / certified electri- cian.

! WARNING

Please read this section thoroughly before attempting to install wiring to this unit.

Removing the Cover Plates

Plates cover the input and output terminals on the front of the Maintenance Bypass Cabinet (see Figure 18). Remove these and keep the screws and plates for reinstallation.

Figure 18 Maintenance Bypass Cabinet—access plate removed

Extract screws from corners to remove the access plate

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Contents Liebert NX UPS Page Table of Contents Options Maintenance Bypass CabinetUPS Specifications Figures Tables Important Safety Instructions Battery Cabinet Precautions Glossary of Symbols External Inspections Internal InspectionsPreliminary Checks UPS LocationConsiderations in Moving the NX Mechanical ConsiderationsSpecial Considerations for 1+N Systems Final PositionFloor Installation ClearancesCable Entry 10-30kVA UPSMaintenance Bypass Cabinet BatteryLiebert Optional CabinetsLug Size and Torque Requirements Power CablingCable Rating UPS Input Configuration Cabling GuidelinesCable Connections BussmannSafety Ground Protective DevicesUPS Rectifier and Bypass Input Supply System OutputCabling Procedure Output System Connections-Ensure Correct Phase RotationCommon Input Connections Dual Input ConnectionsControl Cables Internal UPS Battery ConnectionsMonitor Board Features Dry Contacts Input Dry ContactsMaintenance Bypass Cabinet Interface Maintenance bypass cabinet interfaceBCB Box Interface BCB box interfaceOutput Dry Contacts EPO Input-Optional Firmware Before M200Output dry contact relays EPO input contact relaysFirmware M200 or Later UPS Batteries SafetyIntroduction External Battery Cabinet Installation Matching Battery CabinetsConnecting the Batteries Removable retainer Tray handle Insulated post for cablingTop cable entry Batteries BCB plate Top cable entry Battery trays BCB plate and BCBBattery tray support Service shelf Installation Considerations Battery tray supports attach To interior surface of NXFront door note notched Ends of supportsConnecting the Battery Cabinet to the UPS Non-Standard BatteriesBypass Switch Normal UPS ModeBypass Mode Maintenance ModeCable Installation Locating the CabinetPower Cable Installation Input/Output WiringMaintenance bypass control wire location Bolting Cabinets Together Line up cabinets so that mounting holes are alignedDBS Cable and Settings Load Bus SynchronizationPerformance Requirements LBS CableGeneral Configuring Parallel System OperationFeatures of Parallel System Installing Parallel System Power Cables InterconnectingParallel Control Cables Parallel System Control Cables Auxiliary Dry Contact CablesInput Distribution Normally Open EPO Normally Closed EPOBattery Circuit Breaker Box Available battery circuit breaker boxesDimensions Circuit BreakerMidpoint Busbar Detail DPN U3813078 Rev. N Front ViewBottom View UPS Mechanical Characteristics Environmental characteristicsMechanical characteristics Conformity and StandardsUPS Electrical Characteristics UPS terminalDC Intermediate Circuit Battery Manufacturers and ModelsInput Rectifier Inverter Output Inverter outputBypass Input Bypass input Time LoadInstallation Drawings Dimensions -top and bottom views Main components-typical unitCable connections Battery 417mm 186mm 687mm Location of internal batteriesW501 3pcs W500 18pcs W506 to W507 W510 to W511 W502 to W503 W504 to W505 W511 to W510 W507 to W506 W509 to W508W505 to W504 W508 to W509 W503 to W502Run From Conductors Liebert -supplied interconnect wiringRefer to for key to interconnection Maintenance Bypass interconnection A00, BR0 Liebert-supplied interconnect wiringRun From Conductors Cabinet Type Distribution Cabinet Load AC Connection Neutral Ground Distribution CabinetIsolated Ground Interconnect wiring-1+N Type a connection to NX Interconnect wiring-1+N Type A1 connection to NX Interconnect wiring-1+N Type B connection to NX Utility AC Source UPS #1-UPS #4 Module AC InputInterconnect wiring-1+N Type B1 connection to NX Interconnect wiring-1+N Type C connection to NX Ph A, B, C-system InputPh a ,B, C UPS Input Ph a ,B, C LoadInterconnect wiring-1+N Type C1 connection to NX + N Cabinet Side View + N Parallel CabinetInterconnect wiring-1+N Type D connection to NX Lineup detail-1+N Type D connection to NXUPS Torque specifications Battery torque ratingInitial Torque Annual Torque Battery In-lb N-m Lug Size and Torque RequirementsCurrent Rating a OCP CB Size a Maintenance bypass cabinet electrical data single inputCurrent CB Size a Maintenance bypass cabinet electrical data dual input Current Rating a CB Size aMulti-module bypass cabinet electrical data SR0, W00 200A300A TR0 E00, FR0G01, GR1 208 104 125 250 400 MR1 UR0, Y00208 280 400 222 300 210 250 167 225 140 175 111 150 Maintenance bypass cabinet lug sizes Maintenance Bypass Cabinet Style, lb. kg Rating Battery cabinet physical characteristicsMaintenance Bypass Cabinet weights Maintenance bypass cabinet dimensions Multi-module paralleling cabinet dimensionsCable Lengths Floor to Connection Point Inside UPS Distance to connection points on the NX UPSSpecifications and Technical Data Specifications and Technical Data Page Ne t ItiTi n That
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10-30kVA, 208V 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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