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Emerson Liebert NX - User Manual

Emerson Liebert NX
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AC Power
For Business-Critical Continuity™
Liebert NX
UPS
User Manual–10-20, 400V, 50/60Hz, 3x1

Table of Contents

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Emerson Liebert NX Specifications

General IconGeneral
TopologyDouble Conversion Online
Frequency50/60 Hz
DimensionsVaries by model
WeightVaries by model
Product TypeUPS
Battery TypeLithium-ion
Communication PortsSNMP
Operating Temperature0°C to 40°C (32°F to 104°F)
Humidity0% to 95% (non-condensing)

Summary

Important Safety Precautions

Save These Instructions

Instructions to save for future reference and safe operation.

Single Module UPS Installation

Introduction

Overview of positioning and cabling requirements for the UPS.

Preliminary Checks

Steps to perform before installing the UPS, checking for damage and correct equipment.

Location

UPS Room

Guidelines for selecting a suitable room for UPS installation, considering ventilation and temperature.

External Battery Room

Recommendations for the environment where external batteries should be mounted.

Storage

Instructions for storing the equipment before installation to protect against environmental factors.

Positioning

System Cabinets

Information on how UPS modules and battery cabinets are designed to be positioned.

Internal UPS Batteries

Details about the UPS's internal battery configuration and options.

Moving the Cabinets

Safety precautions and methods for moving UPS and battery cabinets.

External Protective Devices

Rectifier and Bypass Input

Guidelines for overcurrent protection and split-bypass input requirements.

Earth Leakage (RCD)

Requirements for residual current devices installed upstream of the UPS.

External Battery

Protection requirements for external batteries.

UPS Output

Protective devices for load distribution.

Power Cables

Cable Termination

Procedures for connecting power cables to the UPS input and output terminals.

Control Cables and Communication

Monitor Board Features

Details on the monitor board's capabilities for managing system parameters and alarms.

Dry Contacts

Input Dry Contacts

Description of input dry contacts for external signals.

Maintenance Bypass Cabinet Interface

Interface details for the maintenance bypass cabinet.

External Circuit-Breaker Interface

Interface for connecting an external battery circuit breaker.

Output Dry Contacts

Description of output dry contacts for alarm signals.

Emergency Power Off Input

How to use the Emergency Power Off (EPO) function.

External Bypass Switch Interlock

Interlock protection for external bypass switches.

Battery Start Facility

Procedure for starting the UPS using the battery.

Battery Installation

Introduction

Overview of UPS battery banks, autonomy time, and configurations.

Safety

Critical safety precautions when working with UPS batteries.

Battery Cabinet

Introduction

Use of battery cabinets for larger battery configurations and autonomy.

Temperature Considerations

Impact of temperature on battery performance and lifespan.

Battery Power Cables

Connection Principles

Broad principles for fitting and connecting battery power cables.

Fitting the Batteries

Guidelines for unobstructed space and clearance when fitting batteries.

Connecting the Battery

Steps and recommendations for connecting battery cables.

Battery Room Design

Conditions for cell layout, service platforms, and battery protection.

Battery Control

UPS Multi-Module Installation

General

Requirements for multi-module UPS installation and remote emergency stop.

Paralleled UPS Modules

Cabinet Installation

Procedure for placing and interconnecting UPS modules in a parallel system.

External Protective Devices

Reference to single module installation for protective devices.

Power Cables

Similarities and differences in power cable wiring for parallel systems.

Control Cables

Intermodule control cable configuration for parallel systems.

Hot-Standby UPS Modules

Cabinet Installation

Placing and interconnecting UPS modules for hot standby configuration.

External Protective Devices

Reference to single module installation for protective devices.

Power Cables

Power cable wiring for upstream and downstream UPS in hot standby.

Dual Bus System

Cabinet Installation

Installation of UPS modules for dual bus systems with static transfer switch.

External Protective Devices

Reference to single module installation for protective devices.

Power Cables

Power cable wiring for dual bus systems.

Control Wires

Connecting DBS cables for dual bus configuration.

Extended Dual Bus Synchronization Option (DBS Interface Box)

Using DBS interface box for non-NX UPS configurations.

Installation Drawings

Operation

Introduction

Overview of Liebert NX UPS functionality and basic operation.

Split-Bypass Input

Explanation of the split-bypass configuration for the UPS.

Static Transfer Switch

How the static transfer switch manages load connection between inverter and bypass.

Battery Temperature Compensation

How internal and external sensors optimize battery management.

Multi Module UPS-1+N

Features of NX Multi-Module UPS Configurations

Compatibility and configuration of multi-module UPS systems.

Requirements for Paralleling of UPS Modules

Conditions for paralleling UPS modules for higher reliability.

Modes of Operation

Normal Mode

Description of the UPS operating in double-conversion mode, supplying the load.

Battery Mode (Stored Energy Mode)

UPS operation during AC mains failure, powered by batteries.

Battery Management-Set During Commissioning

Normal Function

Settings for charging current, boost voltage, float charge, and temperature compensation.

Advanced Functions (Software Settings Performed by the Commissioning Engineer)

Battery self-test and other advanced settings configured by engineers.

Battery Protection (settings by commissioning engineer)

Operating Procedures

Introduction

Instructions for switching modes, resetting, and operating the UPS.

Power Switches

Explanation of the input circuit breaker (CB1) and rotary switch (SW1) functions.

UPS Startup

Start-Up Procedure

Step-by-step guide to starting the UPS from a powered-down state.

Verify Switching Between Operation Modes

Procedures for switching between normal, battery, and bypass modes.

Switching the UPS from Normal to Maintenance Bypass

Powering Down the UPS

Powering Down the UPS and Maintaining Power to Load

Emergency Shutdown With EPO

Auto Restart

Reset After Shutdown for Emergency Stop (EPO Action) or Other Conditions

Language Selection

Changing the Current Date and Time

Command Password

Isolating One Module in a Multi-Module System

Inserting One Module into a Multi-Module System

Operator Control Panel and Display

Introduction

Overview of the control panel as the access point for monitoring and control.

Mimic Power Flow

Explanation of the LEDs on the mimic flow chart indicating UPS status.

Audible Alarm (Buzzer)

Description of the audible alarm sounds and their meanings.

Direct Access Push Buttons (Keys)

Functions of direct access buttons like EPO, Inverter ON/OFF.

LCD Monitor and Menu keys

How to navigate and use the LCD monitor and menu keys.

All Status and Event Messages Displayed on the UPS Front Panel

Prompt (Pop-Up) Windows

Dynamic Energy Flow Chart and UPS Help Screen

Default Screen Saver

Options-For Assembly Inside the UPS Cabinet

Protection

Optional equipment for protecting the UPS system.

Battery Ground Fault Detection

Optional device to detect battery leakage current for safety.

Redundant Fan for Power Module

OC Web Card - SNMP;HTTP Network Interface Card

Relay Card

Multiport-4 Card

OC485 Web Card - Modbus, Jbus, IGM Net

Configuring Baud Rates

How to set baud rates for communication cards.

Liebert NX Remote Alarm Monitor

Optional panel for remote status and alarm monitoring.

Dust Filter

Procedure for installing and replacing dust filters.

Technical Specifications

Conformity and Standards

List of European and international standards the UPS conforms to.

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