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Liebert NX 10kVA User Manual

Liebert NX 10kVA
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POWER AVAILABILITY
NX™
INSTALLATION MANUAL
10-30kVA
208V, 60Hz

Table of Contents

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Liebert NX 10kVA Specifications

General IconGeneral
Capacity10 kVA
TopologyDouble Conversion Online
Output Voltage208/220/230/240 VAC
EfficiencyUp to 94%
Humidity0-95% non-condensing
Input Frequency40-70 Hz
Output Frequency50/60 Hz
Battery TypeVRLA
Form FactorTower
Communication PortsRS-232, USB
Operating Temperature0°C to 40°C (32°F to 104°F)

Summary

Important Safety Instructions

Battery Cabinet Precautions

Precautions for handling and installing battery cabinets to prevent hazards.

Installation

External Inspections

Visual checks of equipment and shipping containers for damage or missing items.

Internal Inspections

Examination of UPS and battery equipment for transit damage and verification of model/serial numbers.

Preliminary Checks

Verifying equipment identification tag to confirm type and size of the UPS.

UPS Location

Guidance on selecting an appropriate installation site considering environmental factors.

Mechanical Considerations

Details on the physical construction of the UPS, including panels, access, and cooling.

Electrical Connections

Power Cabling

Guidelines for selecting and sizing power cables based on voltage, current, and installation conditions.

UPS Input Configuration

Explanation of split bypass (dual-input) configuration and wiring for the NX system.

Control Cables

Overview of control cables, monitor board features, and auxiliary connections.

Dry Contacts

Information on input and output dry contacts for alarm signaling and system status.

UPS Startup

Procedure for starting the UPS system from a fully powered-down state.

Switching UPS to Maintenance Bypass

Procedure to transfer the load from the UPS inverter to the Maintenance Bypass line.

Powering Down the UPS

Steps to safely power down the UPS system completely.

Battery Installation

Introduction

Recommendations for matching internal and external batteries for optimal backup.

Safety

Critical safety precautions when working with UPS batteries, emphasizing lethal voltages.

UPS Batteries

Information on battery charging and handling before and after shipment.

Temperature Considerations

Impact of ambient temperature on battery performance, life, and capacity.

Battery Protection

Details on undervoltage, end-of-discharge, and fuse-blow protection mechanisms.

External Battery Cabinet Installation

Principles for fitting and connecting external battery cabinets, including overcurrent protection.

Matching Battery Cabinets

Guidance on selecting, handling, installing, and connecting battery cabinets.

Non-Standard Batteries

Requirements for using non-standard batteries, including remote disconnects.

Maintenance Bypass Cabinet

Bypass Switch

Description of the bypass switch function for load transfer.

UPS Mode

Operation of the bypass cabinet when the UPS is supplying the load.

Bypass Mode

Operation of the bypass cabinet providing an alternate power path for maintenance.

Maintenance Mode

Operation of the bypass cabinet for maintenance, where the UPS is not protected.

Mounting the Cabinet

Guidelines for mounting the maintenance bypass cabinet next to or standalone from the UPS.

Cable Installation

Steps for preparing and installing wiring for the maintenance bypass cabinet.

Bolting Cabinets Together

Procedure for physically connecting the UPS and bypass cabinets.

Operating Procedures

Steps for starting, shutting down, and transferring between UPS and bypass modes.

Options

Dual Bus Synchronizer

Functionality and requirements for the Dual Bus Synchronizer for parallel UPS systems.

Configuring Parallel System Operation

Details on setting up and configuring parallel UPS systems for reliability and expansion.

Installing Parallel System

Procedures specific to installing parallel UPS systems, including cabinet and cable connections.

Commissioning a Parallel System

Steps for checking and setting parameters for a parallel UPS system startup.

Parallel System Startup

Procedure for starting up parallel UPS modules and verifying normal operation.

Battery Circuit Breaker Box

Information on battery circuit breaker boxes for isolation and overcurrent protection.

Specifications

Conformity and Standards

List of industry standards and certifications the UPS system complies with.

UPS Environmental

Operating conditions including temperature, humidity, and noise levels for the UPS.

UPS Mechanical Characteristics

Physical dimensions, weight, ventilation, and color specifications of the UPS.

UPS Electrical Characteristics

Detailed electrical specifications including voltage, current, and battery data.

Specifications and Technical Data

Lug Size and Torque Requirements

Specifications for lug sizes and torque values for electrical connections.

Cable Lengths: Floor to Connection Point Inside UPS

Data for calculating required cable lengths from floor to internal UPS connection points.

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