Liebert NX UPS System user manual Cable Termination, Common Input Connections

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Single Module UPS Installation

1.6.1Cable Termination

NOTE

The operations described in this section must be performed by authorised electricians or qualified technical personnel. If you have any difficulties, do not hesitate to contact our Customer Service and Support Department. See the back page of this manual for contact information.

Once the equipment has been finally positioned and secured, connect the power cables as described in the following procedure.

Refer to the appropriate cable connection drawing in 4.0 - Installation Drawings.

1.Verify that the UPS equipment is isolated from its external power source and all the UPS power isolators are open. Check that these supplies are electrically isolated and post any necessary warning signs to prevent their inadvertent operation.

2.Open the door to the UPS cabinet and remove the front protective cover to gain access to the connections bars.

3.Connect the safety earth and any necessary bonding earth cables to the copper earth busbar located on the floor of the equipment below the power connections. All cabinets in the UPS must be connected to the user’s ground connection.

NOTE

The earthing and neutral bonding arrangement must be in accordance with local and national codes of practice.

Identify and make power connections for incoming cables according to one of the two procedures below, depending on the type of installation.

Common Input Connections

4.For common bypass and rectifier inputs, connect the AC input supply cables between the mains distribution panel and the UPS input (mA-mB-mC-N terminals) and tighten the connections to 5Nm (M6 Bolt). Ensure correct phase rotation.

Split-Bypass Connections

5.If a split-bypass configuration is used, connect the AC input supply cables to the rectifier input busbars (mA-mB-mC-N terminals) and the AC bypass supply cables to the bypass input (bA-bB-bC-N terminals) and tighten the connections to 5 Nm (M6 Bolt). Ensure correct phase rotation.

NOTE

For split-bypass operation, ensure that the linking busbars between bypass and rectifier input are removed.

The AC input and the AC bypass supplies must be referenced to the same neutral point.

Frequency Converter Mode

If a frequency converter configuration is used, connect the AC input supply cables to the rectifier input busbars (U1-V1-W1-N terminals) to 5Nm for M6 bolts, to 13Nm for M8 bolts or to 26Nm (M10 bolt). Ensure correct phase rotation and tighten the connections. There will not be any AC bypass supply cables to the bypass input (U3-V3-W3-N terminals).

NOTE

For frequency converter operation, ensure that the linking busbars between bypass and rectifier input are removed.

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Contents Liebert NX UPS Page Table of Contents Dual Bus System UPS MULTI-MODULEINSTALLATIONOPTIONS-FORASSEMBLY Inside the UPS Cabinet Operating ProceduresTechnical Specifications Operator Control Panel and DisplayFigures Tables Output Feature Set for Region InputAust/NZ Options Model IdentificationConformity and Standards Safety PrecautionsBattery Voltage Exceeds 400VDC User-Serviceable PartsPreliminary Checks IntroductionLocation External Battery RoomUPS Room StorageSystem Cabinets Positioning2 10 to 30kVA UPS Moving the CabinetsExternal Protective Devices UPS Output External BatteryEarth Leakage RCD Distance from floor to connection point on the equipment Power CablesMaximum steady state AC and DC currents Common Input Connections Cable TerminationOutput System Connections Control Cables and Communication Monitor Board FeaturesMaintenance Bypass Cabinet Interface X3 Ancillary Control and AlarmsDry Contacts Input Dry ContactsJumper connection for BCB interface External Circuit-Breaker InterfaceOutput dry contact relays Output Dry Contacts+12V J13 J21 J28X5 Auxiliary DC Power Output Emergency Power Off InputX7 External Battery Temperature Detector Interface X6 Analog Input InterfaceBattery Start Facility External Bypass Switch InterlockBattery Start Button Serial Ports RS232-1 and RS232-2Battery Installation Hazardous battery voltage present behind covers SafetyBattery Cabinet Moving the Battery Cabinets Battery Temperature Sensor OptionalCable W2 is packed with the temperature sensor Name W2 L=5m Name W1 L=30mGeneral Arrangement Drawings Battery cabinet bottom cable entry locationBottom cable entry Battery cabinet internal layout Item # Item Name Battery Power CablesConnection Principles Connecting the Battery Battery ControlBattery Room Design Fitting the BatteriesX23 X24 Monitor Board GeneralX24 X21Distribution Cabinet Cabinet InstallationParalleled UPS Modules External Protective Devices Power CablesControl Cables Intermodule Control Hot-Standby UPS ModulesInput Distribution Upstream Dual Bus System Extended Dual Bus Synchronization Option DBS Interface Box Control WiresParallel Board X2-2 X1-1 Parallel System Parallel Board DBS Cable X2-2 X1-1 Parallel SystemInstallation Drawings General arrangement-10-30kVA UPS module External Battery Input Output Main Input Bypass Input NXe 10-30kVA Top View Internal battery layout and connecting-GP12120 F2 12AH/12V Internal battery layout Split-Bypass Input Battery Temperature Compensation Static Transfer SwitchSocket Outlet Redundant Control Power Supply BoardMulti Module UPS-1+N Modes of Operation Maintenance Mode Manual Bypass Bypass ModeECO Mode Single UPS Only Parallel Redundancy Mode System ExpansionNormal Function Battery Management-Set During CommissioningBattery Protection settings by commissioning engineer UPS operating modes Power SwitchesRotary switch configurations UPS Startup Start-Up ProcedureIndicator State Verify Switching Between Operation Modes Powering Down the UPS Switching the UPS from Normal to Maintenance BypassPowering Down the UPS and Maintaining Power to Load Auto Restart Emergency Shutdown With EPOChanging the Current Date and Time Command PasswordLanguage Selection Isolating One Module in a Multi-Module System LED Function Status Inserting One Module into a Multi-Module SystemButton Function UPS control and display panel componentsComponent # Function Audible Alarm Buzzer Mimic Power FlowMenu key Icons and their meaning Direct Access Push Buttons KeysLCD Monitor and Menu keys Language Settings Command Version Load System Battery RecordsWhen configured, input transformer voltages are Displayed on the front LCD. When not activated,UPS system window Detailed Description of Menu ItemsDescriptions of UPS menus and data window items Menu Type Item Type ExplanationNumber to be dialed to send an alarm notification Message Description / Suggested Action if any UPS messagesBypass voltage exceeds the limit UPS is confirmed to overload and the overload times out UPS messages Prompt Pop-Up Windows Dynamic Energy Flow Chart and UPS Help ScreenPrompt windows, meanings Prompt MeaningDefault screen Default Screen SaverTerminal Name Definition Battery Ground Fault DetectionProtection Fan120 Redundant Fan for Power ModuleFan120 AC FanOC Web Card data summary window OC Web Card SNMP/HTTP Network Interface CardRelay Card Relay Card pin configurationMultiport-4 Card Relay card jumpersPin Description SiteNet MultiPort4 Intellislot pin assignmentAssignment OC485 Web Card Modbus, Jbus, IGM Net Remote Alarm MonitorDust Filter for 10-30kVA Dust filter replacementConformity and Standards Environmental characteristicsCompliance with European, international standards Overall efficiency, heat losses and air exchangeRectifier AC input mains Mechanical characteristicsInverter output to critical load Bypass mains input Technical Specifications Technical Specifications Page Iti Ne tTi n That
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