Liebert NX UPS System user manual External Protective Devices, Power Cables

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UPS Multi-Module Installation

Figure 15 Dry contacts, multiple UPS modules with distribution panel

Input Distribution

UPS 1

UPS 2

UPS N

M3 Board	M3 Board	M3 Board
X3	X3	X3
Ext. Maint. Ext. Out	Ext. Maint. Ext. Out	Ext. Maint. Ext. Out

1

2

3

4

1

2

3

4

1

2

3

4

Q1ExtQ2ExtQnExt

QUPS	Distribution Panel	QByp
		QByp

To Load

3.2.2External Protective Devices

Refer to the instructions in 1.0 - Single Module UPS Installation.

3.2.3Power Cables

The wiring of power cables is similar to that of single module system. The Bypass and the Main input sources must be referenced to the same neutral potential and input earth leakage monitoring devices, if installed, must be located upstream of the common neutral sinking point. Refer to the instructions in 1.0 - Single Module UPS Installation.

NOTE

The length and specification of power cables including the bypass input cables and UPS output cables should be the same. This facilitates load sharing when operating in bypass mode.

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Contents Liebert NX UPS Page Table of Contents UPS MULTI-MODULEINSTALLATION Dual Bus SystemOperating Procedures OPTIONS-FORASSEMBLY Inside the UPS CabinetTechnical Specifications Operator Control Panel and DisplayFigures Tables Feature Set for Region Input OutputAust/NZ Options Model IdentificationSafety Precautions Conformity and StandardsUser-Serviceable Parts Battery Voltage Exceeds 400VDCIntroduction Preliminary ChecksExternal Battery Room LocationUPS Room StoragePositioning System Cabinets2 10 to 30kVA UPS Moving the CabinetsExternal Protective Devices External Battery Earth Leakage RCDUPS Output Power Cables Maximum steady state AC and DC currentsDistance from floor to connection point on the equipment Cable Termination Common Input ConnectionsOutput System Connections Monitor Board Features Control Cables and CommunicationX3 Ancillary Control and Alarms Maintenance Bypass Cabinet InterfaceDry Contacts Input Dry ContactsExternal Circuit-Breaker Interface Jumper connection for BCB interfaceOutput Dry Contacts Output dry contact relays+12V J13 J21 J28Emergency Power Off Input X5 Auxiliary DC Power OutputX7 External Battery Temperature Detector Interface X6 Analog Input InterfaceExternal Bypass Switch Interlock Battery Start FacilityBattery Start Button Serial Ports RS232-1 and RS232-2Battery Installation Safety Hazardous battery voltage present behind coversBattery Cabinet Battery Temperature Sensor Optional Moving the Battery CabinetsCable W2 is packed with the temperature sensor Name W2 L=5m Name W1 L=30mBattery cabinet bottom cable entry location General Arrangement DrawingsBottom cable entry Battery cabinet internal layout Battery Power Cables Connection PrinciplesItem # Item Name Battery Control Connecting the Battery Battery Room Design Fitting the BatteriesGeneral X23 X24 Monitor BoardX24 X21Cabinet Installation Paralleled UPS ModulesDistribution Cabinet Power Cables External Protective DevicesHot-Standby UPS Modules Control Cables Intermodule ControlInput Distribution Upstream Dual Bus System Control Wires Extended Dual Bus Synchronization Option DBS Interface BoxParallel 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 Static Transfer Switch Battery Temperature CompensationRedundant Control Power Supply Board Multi Module UPS-1+NSocket Outlet Modes of Operation Bypass Mode Maintenance Mode Manual BypassECO Mode Single UPS Only Parallel Redundancy Mode System ExpansionBattery Management-Set During Commissioning Battery Protection settings by commissioning engineerNormal Function Power Switches Rotary switch configurationsUPS operating modes Start-Up Procedure Indicator StateUPS Startup Verify Switching Between Operation Modes Switching the UPS from Normal to Maintenance Bypass Powering Down the UPSPowering Down the UPS and Maintaining Power to Load Emergency Shutdown With EPO Auto RestartCommand Password Language SelectionChanging the Current Date and Time Isolating One Module in a Multi-Module System Inserting One Module into a Multi-Module System LED Function StatusUPS control and display panel components Component # FunctionButton Function Mimic Power Flow Audible Alarm BuzzerDirect Access Push Buttons Keys LCD Monitor and Menu keysMenu key Icons and their meaning Load System Battery Records Language Settings Command VersionWhen configured, input transformer voltages are Displayed on the front LCD. When not activated,Detailed Description of Menu Items UPS system windowDescriptions of UPS menus and data window items Menu Type Item Type ExplanationNumber to be dialed to send an alarm notification UPS messages Message Description / Suggested Action if anyBypass voltage exceeds the limit UPS is confirmed to overload and the overload times out UPS messages Dynamic Energy Flow Chart and UPS Help Screen Prompt Pop-Up WindowsPrompt windows, meanings Prompt MeaningDefault Screen Saver Default screenBattery Ground Fault Detection ProtectionTerminal Name Definition Redundant Fan for Power Module Fan120Fan120 AC FanOC Web Card SNMP/HTTP Network Interface Card OC Web Card data summary windowRelay Card pin configuration Relay CardMultiport-4 Card Relay card jumpersSiteNet MultiPort4 Intellislot pin assignment AssignmentPin Description Remote Alarm Monitor OC485 Web Card Modbus, Jbus, IGM NetDust filter replacement Dust Filter for 10-30kVAEnvironmental characteristics Conformity and StandardsCompliance with European, international standards Overall efficiency, heat losses and air exchangeMechanical characteristics Rectifier AC input mainsInverter output to critical load Bypass mains input Technical Specifications Technical Specifications Page Ne t ItiTi n That