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Electrical Connections
2.3.4Output Dry Contacts
There are three output dry contact relays at the X1 slot (see Figure 9 and Table 4).
Figure 9 Output dry contacts and EPO wiring for firmware before M170
X1
| J13 | | | J21 | | | J25 | |
BFP C | BFP S | BFP O | INV C | INV S | INV O | ACF C | ACF S | ACF O |
NOTE: The black square on each slot
indicates Pin 1.
Table 4 | Output dry contact relays |
| | |
Position | Name | Description |
| | |
J13.2 | BFP_O | Bypass feedback protection relay. Normally open. Closed when bypass SCR is shorted. |
| | |
J13.3 | BFP_S | Bypass feedback protection relay center |
| | |
J13.4 | BFP_C | Bypass feedback protection relay. Normally closed. Open when bypass SCR is shorted. |
| | |
J21.2 | INV_O | Inverter mode relay. Normally open. Closed when UPS is in inverter mode. |
| | |
J21.3 | INV_S | Inverter mode relay center |
| | |
J21.4 | INV_C | Inverter mode relay. Normally closed. Open when UPS is in inverter mode. |
| | |
J25.2 | ACF_O | Main input fault relay. Normally open. Closed when main input is in fault. |
| | |
J25.3 | ACF_S | Main input fault relay center |
| | |
J25.4 | ACF_C | Main input fault relay. Normally closed. Open when main input is in fault. |
| | |
NOTE
All auxiliary cables of terminal must be double-insulated. Wire should be 20-16AWG stranded for maximum runs between 82 and 197 feet (25-60m), respectively.
Liebert NX UPS
Page
Table of Contents
UPS Specifications
Options
Operator Control and Display Panel
Pop-Up Windows
Operating Instructions
Appendix a UPS Status Messages
Specifications and Technical Data
Tables
Page
Important Safety Instructions
Battery Cabinet Precautions
Glossary of Symbols
External Inspections
Installation
Internal Inspections
Preliminary Checks
UPS Location
Special Considerations for Parallel Systems
Battery Location
Considerations in Moving the Liebert NX
Mechanical Considerations
System Composition
Floor Installation
Clearances
Cable Entry
Cabinet arrangement-Liebert NX units and battery cabinets
UPS
Power Cabling
Cable Rating
Lug Size and Torque Requirements
Cabling Guidelines
UPS Input Configuration
Input and output busbars
Cable Connections
Safety Ground
Protective Devices
UPS Rectifier and Bypass Input Supply
Dual Input Connections
Cabling Procedure
Output System Connections-Ensure Correct Phase Rotation
Common Input Connections
Frequency Converter Mode
Monitor Board Features
Control Cables
Dry Contacts
Input dry contacts at
Maintenance Bypass Cabinet Interface
Maintenance bypass cabinet interface
Input Dry Contacts
BCB control interface
BCB Control Interface
Output dry contact relays
Inverter mode relay center
Main input fault relay center
Output Dry Contacts
EPO Input-Optional
EPO input contact relays
Indicates Pin
Introduction
Safety
Battery Cabinets
External Battery Cabinet Installation
Connecting the Batteries
Installation Considerations
Insulated Post Tray Handle For Cabling
Connecting the Battery Cabinet to the UPS
Non-Standard Batteries
BCB Shunt Trip
Alber Monitoring System-Optional
This power must be UPS protected
LBS Cable
LBS Cable and Settings
Load Bus Synchronization
Performance Requirements
Configuring Parallel System Operation
Features of Parallel System
General
Installing Parallel System
Operating Principles Redundancy Paralleling
Operation Modes Summary
Preliminary Checks
Cabinet Installation
Power Cables
Conditions for Parallel System
Interconnecting
Auxiliary Dry Contact Cables
Cables
Q1Ext Q2Ext
QByp
To Load
Normally Closed EPO
Normally Open EPO
Conformity and Standards
UPS Mechanical Characteristics
Environmental characteristics
UPS mechanical characteristics
UPS terminal
UPS Electrical Characteristics
Battery Manufacturer Models Supplied
Rectifier input power
Liebert approved replacement batteries
Rated Power kVA 100 120
DC Intermediate Circuit
Inverter Output
Bypass Input
Left Side
GND
Left Side View Front View
Max. Door Swing
U3819205
Batt
Ext
530628 Pg , Rev
External Battery Cabinet
Battery Breaker
Auxiliary Contacts
Top
Top Front Right Side
System
Front Rear
Rear
FRONTOutput
Run From Conductors
AC Output
Ph A, B, C System Input
Ph A, B, C UPS Inputs
Ph A, B, C UPS Outputs
Utility UPS #1-UPS #4 Module AC Ph A, B, C UPS Inputs
Ph A, B, C System Outputs
Ground UPS
U3819301
Isometric View
General Description
Single module block diagram dual input configuration
Bypass Supplies
Normal Mode
Battery Mode
Bypass Mode
Parallel Redundancy Mode System Expansion
Maintenance Mode
Display Panel Layout
Operator Control Panel
Detailed view of control panel
Mimic indicators Control buttons Navigation keys
Mimic display status indicators
Mimic Display Indicators
Control buttons
Control Buttons
LCD Overview
Audible Buzzer
Description of items in UPS system window
Navigation Keys
UPS System Information
Icons for navigation keys
LCD Menus and Data Items
Input
Descriptions of UPS menus and data window items
Menu Type Item Type Explanation
Mains
Start/stop Battery
Language Selection
Tests
Set date and time
Current Date and Time
Current status and history log records
UPS Status Messages
Default Screen
Types of LCD Screens
Opening Display
Screen Saver Window
UPS Help Screen
Pop-Up Windows
UPS operating modes
Liebert NX Operating Modes
Circuit breakers
Circuit Breakers
Startup Procedure
Indicator State
UPS Startup
Switch from Bypass Mode to Normal Mode
Switch from Normal Mode to Bypass Mode
Maintenance Bypass Procedure and Powering Down the UPS
Emergency Shutdown With EPO
Auto Restart
Battery End-of-Discharge EOD Protection
Battery Protection
Multi-Module System Procedures
Battery Undervoltage Pre-Warning
Tie breaker
LED Function Status
Inserting One Module into a Multi-Module System
Commissioning a Parallel System
Shutdown Procedure-Complete UPS and Load Shutdown
Parallel System Start Up
Liebert IntelliSlot Communication
Power Output
Communication and Other User Terminals
Analog Input Interface
Baud Rates
See 10.1.5 Configuring
Liebert NX communication options
Comments
Configuring Baud Rates
Liebert IntelliSlot Web card display
Pin Function Operation
Relay Card pin configuration
Relay card jumper configuration
Relay Card
MultiPort 4 Card
Assignment
Pin Description
Remote Alarm Monitor
LBS Mode-Load Bus Synchronization
Replacing Dust Filters
Cable Lengths Floor to Connection Point Inside UPS
Torque specifications
Battery torque rating
Lug Size and Torque Requirements
Parallel system current table
Distance to connection points on the Liebert NX UPS
External cabinet dimensions, including side panels
Cable size and tightening torques
Lead/Lag ratings
250 10 N*m
Estimated battery run time, minutes
Battery Run Times
Services at 800-543-2378 for assistance
UPS status messages
Event Message Description / Suggested Action if any
Software according to the customer’s agreement
High ambient air temperature
Bypass voltage is beyond the normal range
Bypass voltage exceeds the limit
Condition is removed
Error can also leads to the alarm
Alarm if applicable
Inverter STS Fail
EPO
Emergency Power Off
UPS status messages
UPS Status Messages
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