Emerson NX manual Options

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Introduction

1.3Options

A number of options are available from Emerson® for your UPS system. Some options are not available for all ratings. Described below are the most frequently provided options. Other options are available. Contact your Emerson sales representative for more information.

•Battery and Racks—The batteries provide power in the event of a power outage. The Liebert NX UPS can use a variety of battery types, provided the battery plant is designed for the UPS DC voltage range and the load requirements of your application.

•Battery Cabinets—Valve-regulated, lead-acid (VRLA) sealed batteries are available in matching cabinets for convenient installation and maintenance in otherwise unprotected space. Depending on the UPS module rating, two or more cabinets may be connected in parallel to provide the additional run time.

•Module Battery Disconnect—The UPS system utilizes a separate Module Battery Disconnect for remotely located batteries. A sensing circuit in the UPS module, set at the battery low voltage limit, trips the Module Battery Disconnect to safeguard the battery from excessive discharge. The Module Battery Disconnect has an undervoltage release mechanism designed to ensure that during any shutdown or failure mode all battery potential is removed from the UPS system.

•Maintenance Bypass—This switchboard provides make-before-break maintenance bypass. It includes: Maintenance Bypass Breaker (MBB) and Maintenance Isolation Breaker (MIB).

•Load Bus Synchronization—The Load Bus Sync (LBS) option keeps independent UPS systems (and therefore their critical load buses) in sync, even when the modules are operating on DC source or asynchronous AC sources. This means that critical loads connected to both load buses can switch seamlessly between the two.

•Temperature-CompensatedCharging—When the battery temperature exceeds a preset limit (typically 77°F [25°C]), this optional circuit proportionally reduces float charging voltage to prevent overcharging the battery.

•Battery Load Testing-When activated, this option forces the battery string to assume the load for a short period of time.

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Liebert®NX™

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Contents Liebert NX Product Warranty Registration Table of Contents Options MaintenanceSpecifications Figures Page Important Safety Instructions Battery Cabinet Precautions General Description Typical single module UPS system one-line diagramMaintenance Bypass Normal ModeBypass Mode Battery ModeOptions Main component locations-225 to 300kVA Liebert NX FeaturesFront Doors Removed Main display screen, typical System Status Touchscreen NavigationMain Display Screen Measures Menu Rectifier Bypass Inverter Chg/Boost Battery LoadStatus Events Log MenuBattery Test Battery MenuBattery Status Battery parameters Battery MeasuresLife menu Life MenuAbout Menu Settings MenuAnimated One Line Mimic Rectifier Functional BlockLoad on bypass, UPS available Load on BypassOff DC Source Input Power Failure-Load on DC SourceManual Operations-All Systems Remote Emergency Power OffStartup-Single Module System Startup-1+N System Load Transfer and Retransfer-Single Module System Transfer ProcedureRetransfer Procedure 6 1+N System Transfer load from UPS to Bypass 9 1+N System Shutdown 7 1+N System Transfer load from Bypass to UPSShut Down-Single Module UPS System Load Transfer-1+N System Add a UPS to the System Collective Load Transfer-1+N System Remove a UPS from System CollectiveCurrent-versus-time curves of overload capacity Automatic OperationsOverloads Without Transfer Automatic Transfers to Bypass Overload Condition Automatic Transfers to Bypass, UPS System FaultsAutomatic Retransfers to UPS MopUPS Shutdown and Monitoring Software Remote Alarm UnitConnectivity combinations Manage UPS AdapterConnectivity Available Selectable Output Contacts Available Selectable Input ContactsSafety Precautions Training Liebert ServicesMaintenance Agreements The Signature Program Professional StartupAir Filters Routine MaintenanceRecord Log Component Expected Life Replace Battery MaintenanceUPS component service life Limited Life ComponentsBattery Safety Precautions Number of Cells Nominal Float 240 480 527 Matching Battery Cabinets-OptionalBattery voltage, nominal and float Battery Voltage, VDCRetorque Value Battery retorque valuesBattery Mfr Battery Model # In-lb N-m Other DC SourcesItems to check include Reporting a ProblemUpstream Feeder Circuit Breaker Setting Inspections Detecting TroubleOther DC Sources Battery OperationEnvironmental specifications DC SourcesPhysical specifications Electrical specificationsSpecifications LiebertNX Page Care Ne tIs t Twor k
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