Paralleled UPS Modules | Liebert NX UPS System manual

UPS Multi-Module Installation

3.2Paralleled UPS Modules

The basic installation procedure of a parallel system comprising two or more UPS modules is the same as that of single module system. The following sections only introduce the installation proce- dures specific to the parallel system.

3.2.1Cabinet Installation

Place the UPS modules side by side and interconnect as shown in Figure 14. The distribution panel (external bypass cabinet) is optional but recommended for ease of maintenance and system testing.

Figure 14 Typical 1+N system block diagram with common input supply, with separate batteries and optional output / bypass distribution panel

SUPPLIED BY OTHERS

INPUT MAINS	INPUT MAINS
SUPPLY L1, L2, L3, N	SUPPLY L1, L2, L3, N

UPS1 CB1

RECTIFER

FUSES

STATIC

SWITCH

SW1-C

UPS2

FUSES

CB1

RECTIFER

SW1-C

STATIC

SWITCH

CHARGER	CHARGER
BATTERY 1	BATTERY 2
INVERTER	INVERTER
	SW1-D
SW1-A	SW1-A
L1, L2, L3, N	L1, L2, L3, N
Q1EXT	Q2EXT
QUPS	QBYP
	Distribution Cabinet

TO LOAD

27

Image 35

Liebert NX UPS System user manual Paralleled UPS Modules, Cabinet Installation, Distribution Cabinet

Contents

Liebert NX UPS Page Table of Contents Dual Bus System UPS MULTI-MODULEINSTALLATION Operator Control Panel and Display Operating ProceduresOPTIONS-FORASSEMBLY Inside the UPS Cabinet Technical Specifications Figures Tables Options Model Identification Feature Set for Region InputOutput Aust/NZ Conformity and Standards Safety Precautions Battery Voltage Exceeds 400VDC User-Serviceable Parts Preliminary Checks Introduction Storage External Battery RoomLocation UPS Room Moving the Cabinets PositioningSystem Cabinets 2 10 to 30kVA UPS External 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 Termination Output System Connections Control Cables and Communication Monitor Board Features Input Dry Contacts X3 Ancillary Control and AlarmsMaintenance Bypass Cabinet Interface Dry Contacts Jumper connection for BCB interface External Circuit-Breaker Interface J28 Output Dry ContactsOutput dry contact relays +12V J13 J21 X6 Analog Input Interface Emergency Power Off InputX5 Auxiliary DC Power Output X7 External Battery Temperature Detector Interface Serial Ports RS232-1 and RS232-2 External Bypass Switch InterlockBattery Start Facility Battery Start Button Battery Installation Hazardous battery voltage present behind covers Safety Battery Cabinet Name W2 L=5m Name W1 L=30m Battery Temperature Sensor OptionalMoving the Battery Cabinets Cable W2 is packed with the temperature sensor General Arrangement Drawings Battery cabinet bottom cable entry location Bottom cable entry Battery cabinet internal layout Item # Item Name Battery Power CablesConnection Principles Fitting the Batteries Battery ControlConnecting the Battery Battery Room Design X21 GeneralX23 X24 Monitor Board X24 Distribution Cabinet Cabinet InstallationParalleled UPS Modules External Protective Devices Power Cables Control Cables Intermodule Control Hot-Standby UPS Modules Input Distribution Upstream Dual Bus System Parallel Board DBS Cable X2-2 X1-1 Parallel System Control WiresExtended Dual Bus Synchronization Option DBS Interface Box Parallel Board X2-2 X1-1 Parallel System Installation 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 Switch Socket Outlet Redundant Control Power Supply BoardMulti Module UPS-1+N Modes of Operation Parallel Redundancy Mode System Expansion Bypass ModeMaintenance Mode Manual Bypass ECO Mode Single UPS Only Normal 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 Bypass Powering Down the UPS and Maintaining Power to Load Auto Restart Emergency Shutdown With EPO Changing 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 System Button Function UPS control and display panel componentsComponent # Function Audible Alarm Buzzer Mimic Power Flow Menu key Icons and their meaning Direct Access Push Buttons KeysLCD Monitor and Menu keys Displayed on the front LCD. When not activated, Load System Battery RecordsLanguage Settings Command Version When configured, input transformer voltages are Menu Type Item Type Explanation Detailed Description of Menu ItemsUPS system window Descriptions of UPS menus and data window items Number to be dialed to send an alarm notification Message Description / Suggested Action if any UPS messages Bypass voltage exceeds the limit UPS is confirmed to overload and the overload times out UPS messages Prompt Meaning Dynamic Energy Flow Chart and UPS Help ScreenPrompt Pop-Up Windows Prompt windows, meanings Default screen Default Screen Saver Terminal Name Definition Battery Ground Fault DetectionProtection AC Fan Redundant Fan for Power ModuleFan120 Fan120 OC Web Card data summary window OC Web Card SNMP/HTTP Network Interface Card Relay card jumpers Relay Card pin configurationRelay Card Multiport-4 Card Pin Description SiteNet MultiPort4 Intellislot pin assignmentAssignment OC485 Web Card Modbus, Jbus, IGM Net Remote Alarm Monitor Dust Filter for 10-30kVA Dust filter replacement Overall efficiency, heat losses and air exchange Environmental characteristicsConformity and Standards Compliance with European, international standards Rectifier AC input mains Mechanical characteristics Inverter output to critical load Bypass mains input Technical Specifications Technical Specifications Page That Ne tIti Ti n