Emerson 250-400kVA manual Metering, Help, Reset, Silence, Load on Bypass

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Operation

Clear Log—This command resets the Date of First Discharge Cycle. A dialog box will warn that the data will be permanently lost and should downloaded before proceeding (see Figure 22).

Figure 22 Battery cycle monitor—clear log

2.2.8Metering

This button will place the metering tables in the multipurpose window.

2.2.9Help

This button will display the help menu.

2.2.10Reset

This button will reset any non-active latched events.

2.2.11Silence

This button will silence the audible alarm.

2.3Modes of Operation

This section illustrates the flow of power through circuit breakers, switches and UPS components during various modes of operation. The same modes of operation apply to all configurations of the Lie- bert NXL. Highlighted (thick) lines in the diagrams indicate power flow and power availability.

These illustrations do not show an alternate power source (generator) and automatic transfer switch (external to the UPS) that might be present at your installation.

2.3.1Load on Bypass

Load on Bypass, with the UPS not available, is shown in Figure 23. The UPS system could be in this mode of operation during either initial startup or UPS system shutdown and isolation for mainte- nance.

NOTICE

Risk of equipment damage. When the critical load is being supplied power from the bypass line, it is exposed to utility failure and fluctuations.

Figure 23 Load on bypass (UPS not available)

Bypass

Input

BFB

CB1

	DC Bus	Module
	DC Bus	Output
	CB2	Output

Battery System

MBD

19

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Contents Liebert NXL Contacting Liebert for Support Battery Cabinet PrecautionsTable of Contents Specifications Figures Page Important Safety Instructions General Description Normal ModeModes of Operation Battery Mode Bypass ModeMaintenance Bypass OptionsIntroduction Main component locations FeaturesMimic display Monitor/mimic display example Utility fail Monitor/mimic display example Normal power flowMonitor/mimic display example Load on bypass, UPS On Menu tree Touchscreen Navigation Main Display ScreenRating Parameters Configurations Menu RatingSystem Settings parameters User SettingsAdjustable setpoints parameters Adjustable SetpointsCell Count Adjustment Status Reports Menu Event ManagementStartup Menu Shutdown menu Shutdown MenuTransfer Menu Transfer/retransfer commandsTime remaining display Battery Management MenuDisplay summary see Figure Metering ResetHelp SilenceLoad on bypass, UPS available OK to TransferInput power fail, load on battery Input Power Failure-Load on BatteryEmergency Module Off Off BatteryRemote Emergency Power Off Manual ProceduresStartup Procedure Startup commands Transfer Procedure Load Transfer ProceduresRe-Transfer Procedure Maintenance Bypass Load TransfersMaintenance Bypass Load Transfers-If Load is on UPS Bypass UPS Shutdown Procedure Shutdown ProceduresSystem Shutdown Procedure Automatic OperationsCurrent-versus-time curves of overload capacity Automatic Transfers to Bypass Overload ConditionAutomatic Retransfers to UPS Automatic Transfers to Bypass, UPS System FaultsSafety Precautions Routine Maintenance Liebert ServicesAir Filters Record LogUPS component service life Battery MaintenanceLimited Life Components Component Expected Life ReplaceBattery Safety Precautions Battery voltage, nominal and float Matching Battery Cabinets-OptionalBattery retorque values Detecting Trouble Torque specifications, unless otherwise labeledRack-Mounted Batteries Torque RequirementsUpstream Feeder Circuit Breaker Setting Inspections Reporting a ProblemCorrective Actions Environmental specifications Battery OperationParameter Specification Environmental ConditionsBattery & DC Parameters Electrical specificationsLiebert NXL Model Size 250 Input ParametersSystem Parameter Liebert NXL Model SizePhysical Parameters & Standards, in mm Specifications Event Message Event Definition Recommended Action Liebert NXL alarm and status messagesObserve the One-Line Display. If the input line is Observe the One-Line Display. To identify which Do not Attempt to Close CB3 Until Reset Displayed on the Module Output Meter. If UPS controls monitor the DC Bus positive Resolve the issue that precipitated the EPO Check the One-Line Display for system status UPS, to transfer back to Inverter If this alarm occurs on an operational unit, it Attempt to manually close the disconnect by Module Output Meter. If the load is less than Output Power Factor. If the displayed power factor Until a service visit has been made and action taken When manual transfers are enabled Under normal conditions, no user action is required Observe the One-Line Display and the Active Event If the command to terminate Regeneration Mode If the alarm cannot be reset, or if the alarm condition UPS Alarm and Status Messages UPS Alarm and Status Messages Page Iti Ne tTi n That