Emerson 10-30kVA installation manual Installing Parallel System

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Appendix

5.2.3Operating Principles Redundancy Paralleling

The 1+N parallel redundant system can noticeably improve system reliability. In normal condition, none of the UPS modules work at full load. That means that even if the load is increased, the system will not transfer to bypass. And when a UPS module shuts down due to any failure, the remaining UPS modules can still power and protect the load. When redundancy is lost due to module failure or load increase, the parallel system will trigger an alarm.

5.2.4Operation Modes Summary

The parallel system also has operation modes such as normal, battery, bypass and maintenance bypass. All UPS modules in the 1+N parallel system operate in coordination.

•Normal Mode Operation

The load is powered by the inverters of all the UPS modules in the system. If the frequency of bypass is within the synchronous range, the inverter will be synchronized with the bypass. Other- wise, the system will operate at nominal frequency.

•Battery Mode Operation

The batteries of all UPS modules power the load through their inverters. The system operates at nominal frequency.

•Bypass Mode Operation

The condition to transfer to bypass mode is essentially the same as that of single module system. The bypass of all the UPS modules powers the load.

•Maintenance Bypass Mode Operation

The sequence to transfer to maintenance bypass mode is the same as for transferring a single- module system. The maintenance bypass switches should be switched on as synchronously as pos- sible. Thus the system can be repaired without interrupting the power supply to critical load.

5.3Installing Parallel System

The basic installation procedure of parallel system is the same as that of single module system. The following sections introduce only the installation procedures specific to the parallel system.

5.3.1Conditions for Parallel System

•Each UPS module should have the same rating, the same firmware and hardware version.

•Each UPS module must have the same bypass source.

•The outputs of all UPS modules are connected altogether.

•The main inputs can be from different sources, but the phase rotation sequence of main inputs, bypass inputs and outputs must be correct and the same.

•The parallel logic cable and load sharing cable must be connected in a ring correctly (see Figure 23).

5.3.2Cabinet Installation

Parallel system composed of two or more UPS modules using parallel cabinet

The UPS modules that will form the 1+N system should be placed side-by-side. Each battery cabinet is placed next to its corresponding UPS module.

The parallel cabinet should be placed in the middle of the system.

5.3.3Preliminary Checks

Each UPS module should have the same rating, the same firmware and the same hardware version. Refer to the instructions in 5.3.1 - Conditions for Parallel System.

5.3.4Protective Devices

For each UPS, refer to Table 10. For each system, refer to Table 31.

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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 LocationSpecial Considerations for 1+N Systems Considerations in Moving the NXMechanical Considerations Final PositionCable Entry Floor InstallationClearances 10-30kVA UPSOptional Cabinets Maintenance Bypass CabinetLiebert Lug Size and Torque Requirements Power CablingCable Rating 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 ConnectionsControl Cables Internal UPS Battery ConnectionsMonitor Board Features 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 LaterUPS Batteries SafetyIntroduction Connecting the Batteries External Battery Cabinet InstallationMatching Battery Cabinets 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 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 CableGeneral Configuring Parallel System OperationFeatures of Parallel System 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 terminalDC Intermediate Circuit Battery Manufacturers and ModelsInput Rectifier 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 W502Run From Conductors Liebert -supplied interconnect wiringRefer to for key to interconnection 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 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 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 Maintenance Bypass Cabinet Style, lb. kg Rating Battery cabinet physical characteristicsMaintenance Bypass Cabinet weights 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.

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