Liebert NX UPS System user manual Hot-Standby UPS Modules, Control Cables Intermodule Control

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UPS Multi-Module Installation

3.2.4Control Cables Intermodule Control

Shielded and double insulated control cables available in lengths of 5, 10 and 15 meters must be must be interconnected in a ring configuration between UPS modules as shown below. The parallel control board is mounted on the top, behind protective cover of each UPS module (refer to Figure 23). The ring configuration ensures high reliability of the control. Refer to Figure 16.

Figure 16 Connection of 1+N system parallel control cables

1

2

3

UPS

4

5

6

Parallel Board

Parallel Board

Parallel Board

Parallel Board

Parallel Board

Parallel Board

X3

P5

X3

P5

X3

P5

X3

P5

X3

P5

X3

P5

X4

X4

X4

X4

X4

X4

X2-2

X2-1

X2-2

X2-1

X2-2

X2-1

X2-2

X2-1

X2-2

X2-1

X2-2

X2-1

P2

P1

P2

P1

P2

P1

P2

P1

P2

P1

P2

P1

X1-1

X1-2

X1-1

X1-2

X1-1

X1-2

X1-1

X1-2

X1-1

X1-2

X1-1

X1-2

P3

P4

P3

P4

P3

P4

P3

P4

P3

P4

P3

P4

3.3Hot-Standby UPS Modules

3.3.1Cabinet Installation

Place the UPS modules side by side and interconnect as shown below.

The hot standby mode comprises two series connected UPS modules of the same rating. One module is designated as the hot standby master (downstream), and the other module is designated as the hot standby slave (upstream). Their roles are determined by power connection and configuration soft- ware. In normal operation, both slave and master operate in normal mode and the output from one upstream (slave) UPS feeds the bypass input to the other (downstream/master) UPS. The output of the downstream (master) UPS is connected to the critical load and is always synchronised to the out- put of the upstream (slave) UPS. If the inverter of the UPS connected to the load fails, the inverter of the upstream (slave) UPS supplies the load through the downstream (master) UPS bypass circuit. The system can be programmed to cycle the downstream (master) UPS between normal mode and bypass mode so that both ups are equally exercised.

NOTE

If it is a hot-standby system, the master (downstream) must be turned on first.

3.3.2External Protective Devices

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

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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 Earth Leakage RCD External BatteryUPS Output Maximum steady state AC and DC currents Power CablesDistance from floor to connection point on the equipment 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 Connection Principles Battery Power CablesItem # Item Name Connecting the Battery Battery ControlBattery Room Design Fitting the BatteriesX23 X24 Monitor Board GeneralX24 X21Paralleled UPS Modules Cabinet InstallationDistribution Cabinet 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 SwitchMulti Module UPS-1+N Redundant Control Power Supply BoardSocket Outlet Modes of Operation Maintenance Mode Manual Bypass Bypass ModeECO Mode Single UPS Only Parallel Redundancy Mode System ExpansionBattery Protection settings by commissioning engineer Battery Management-Set During CommissioningNormal Function Rotary switch configurations Power SwitchesUPS operating modes Indicator State Start-Up ProcedureUPS Startup 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 EPOLanguage Selection Command PasswordChanging the Current Date and Time Isolating One Module in a Multi-Module System LED Function Status Inserting One Module into a Multi-Module SystemComponent # Function UPS control and display panel componentsButton Function Audible Alarm Buzzer Mimic Power FlowLCD Monitor and Menu keys Direct Access Push Buttons KeysMenu key Icons and their meaning 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 SaverProtection Battery Ground Fault DetectionTerminal Name Definition 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 jumpersAssignment SiteNet MultiPort4 Intellislot pin assignmentPin Description 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