Liebert 30-130kVA manual Setting Up External Communication Devices, Load on Bypass, OK to Transfer

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Operation

3.5.5Setting Up External Communication Devices

All external communication devices, including the modem, are optional equipment. Connections to communication ports are made by wiring cables to terminal boards. Connection points are shown on the Control Wiring Interconnect Diagram in the Installation Manual. Contact Liebert Global Services for assistance when attaching an external device to your UPS system.

Any terminal that accepts the standard 7-bit ASCII codes and conforms to the data link requirements can be used to interface with the Npower UPS. If a printer is used, the terminal must support it. The UPS does not send or receive any printer control commands.

Data link requirements are:

•Asynchronous RS-232 communication

•Terminals may be configured as DTE or DCE

•Baud Rate:

Modem 1200 or 2400

Terminal 9600 only

•Data Bits: 8

•Stop Bits: 1

•Parity: None

•Handshaking: Not required

•Full Duplex

3.6Modes Of Operation

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

3.6.1Load on Bypass

Load on bypass, with the UPS not available, is shown in the figure below. The UPS system could be in this mode of operation during either initial startup or UPS system shutdown and isolation for maintenance.

Figure 112Load on bypass, UPS not available

MIMIC DISPLAY

SERV

SS

RECT. INV. LOAD

BATTERY

SYS. STATUS

NORM

3.6.2OK to Transfer

The OK to Transfer status message will be displayed when the bypass line and UPS system output power are both available, their voltage, frequency, and phase synchronization are matched within specifications, and the Static Switch Disconnects are closed (ON). An alarm message may be dis- played to indicate Load on Bypass. If no alarm is displayed, the operating status is Load On UPS.

When the OK to Transfer message is displayed, you can perform a manual transfer of the load from the UPS system to bypass, or a manual retransfer of the load from bypass to the UPS system. See 3.3.6 - Manual Transfer for more information.

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Contents Npower UPS Page Table of Contents Maintenance Communication InterfacesFigures Page Tables Page Important Safety Instructions Overview of Manual System Description Safety Precautions Factory Backup and Service AssistanceReliability VersatilityInput Power Failure Modes Of OperationNormal Load On UPS RechargeCHG Mimic DisplaySYS. Status Operator Controls OptionsGeneral Component Description Battery SystemUPS Module Controls Hardware Detailed Component DescriptionsFirmware Input Power Factor Battery Charging CircuitRectifier/Charger OperationBattery Disconnect Battery Charge Current LimitingBattery Equalize Charge Circuit Operation After End-of-dischargeNonlinear Load Characteristics Unbalanced Load CharacteristicsStatic Bypass Switch Static Switch Backfeed ProtectionTransfer and Retransfer Conditions Operation Operation Operator Control Panel Navigation ButtonsRotary Switch Rotary switchConfiguration User SettingsSecurity Access and Passwords Prev Cancel Save & ExitDisplay Screens and Procedures Menu TreePrimary Screens Secondary ScreensMain Menu Screen Mimic Display ScreenFaults Faults / AlarmsRect DischgMimic Display SYS. StatusDC BUS / Battery Status Input StatusFreq Temps DEG C Inlet AIR Outlet AIR Heat SinksBypass Input Status Freq .9 HZ 213 214 Phase DiffOutput Load Status Active Faults and Alarms Faults and AlarmsUser Shutdown EXI TSystem Ratings NextSecond Scenario Manual StartupAuto Startup Input Modify Current Limit Target and Ramp Values Modify DC BUS SET Point Target and Ramp ValuesServ Skip AbortSIB External Maintenance Bypass External maintenance bypass switch, dual-input UPSExternal maintenance bypass switch, single-input UPS Multiple Battery Cabinets External Maintenance Bypass Switch ConfigurationsUser Shutdown ShutdownStatus Reports System StatusHistory LOG Clear History Logs Clear Event LOG Status ReportsTotal Event LOGEvent Log History LOG 02 / 10OUT-V IN-V Load Freq OutputSBS Line Trap SBS Load Input of / UFConfiguration Screens ExitDC BUS Volts Input FrequencyOutput Frequency PrevSystem Settings Cancel Save & ExitSystem Settings Current DateNext PREV. Cancel Save & Exit Current TimeOrder Number TimeEnter Password Single / Dual InputDual Output Transformer Bypass WIND. no10% Passive Filter Settings OptionsActive Filter LBS Generator Auto Restart OptionsPulse Rectifier Battery GND Fault Green Machine Alternate Power Pole FAN noLine Drop Compensation Prev ExitAuto Dial Communication OptionsNext Exit Pager Support Configuration Pager Enabled Pager Number Pager PINModem Health Check Auto Dial YES Auto Dial OUT PagerPREV. Cancel Next PREV. Cancel Factory Settings 10 % Passive Filter SettingsNext Cancel Alarm Mask LatchingDial FreezeAlarm / Fault Name Alarm / Fault Name Battery Fuse FailAlarm / Fault Name F E Save & Exit CancelCustomer Alarm Interface Auto DialProgrammable Output Relay Board # Customer Alarm InterfaceRemote LED Board # STD SET User Defined Relay AssignmentsSTD SET Prog Relay # UP Down ADD Remove Clear ExitNavigating Protocol Manual TransferBattery Management Battery TestAuto Test Battery Cycle Battery DurationBattery Equalizer MIN MAX WeeksEnabled Disabled AutoManual Stop StartBattery Temp Compensation Charge TemperatureBattery Temperature Compensation Charge Equalize Time PeriodBattery Temp Compensation Battery Cycle MonitorSummary Clear BCM Battery Cycle MonitorClear Summary YES / no Summary Seconds Discharge CyclesTime Down Battery Time Low Warning BATT. EOD Lower SET Point BATT. EOD Upper SET PointBATT. Time LOW Warning Battery SupplementAuto Restart Alarm Notifications Auto Restart Trigger ConditionSystem Status System Status MonitoringSystem Status Sign OFF Date 10/30/01Next Prev Save & Exit Sign OFF Date 10/30/02Accumulated Backup Hours Accumulated Operating Hours on UPSAccumulated Operating Hours on Bypass Accumulated # of Brown OutsFaults, Alarms, Status FaultsAlarm / Fault Name F E Delay On Battery Input Contact #1UP Down Description L Latching...D DialSummary Alarm Messages Alarms, functions, and corrective actionsContact Liebert Global Service to check Excess load from the UPS and attempt to EPO Maximum heat sink temperature limit This is a summary event based on Battery is discharging. This occurs RMS input current has reached Output kVA or kW or RMS current has With the load on UPS, PhaseB output KVA Condition only causes an alarm, but should Push-button switch located on See 3.3.7 Battery Management All of the alarms before attempting to Communication Interfaces StatusWorldwide Reporting 1 RS-232 Port Local Reporting TerminalAuto-Dial Requesting Information Dial Out PagerRemote Alarm Status Panel SiteScanLoad on Bypass Setting Up External Communication DevicesOK to Transfer Input Power Failure Load on Battery Momentary OverloadsAutomatic Operations OverloadsAutomatic Transfers to Bypass Automatic Re-transfers to UPSAutomatic Module Off Line Maintenance Routine Maintenance Battery MaintenanceRecord Log Air FiltersBattery Safety Precautions Battery voltage record Torque RequirementsReporting a Problem Detecting TroubleCorrective Actions Recommended Test EquipmentMaintenance 101 Maintenance 102 Page Ne t