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AC Power
For Business-Critical Continuity™
® ™
Liebert NX
Operation and Maintenance Manual – 225-600kVA, Three-Phase, Single-Module & Multi-Module
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CONTACTING EMERSON NETWORK POWER FOR SUPPORT To contact Emerson Network Power Liebert Services for information or repair service in the United States, call 800-543-2378. Liebert Services offers a complete range of star-up services, repair services, preventive maintenance plans and service contracts. For repair or maintenance service outside the 48 contiguous United States, contact Liebert Services, if available in your area. For areas not covered by Liebert Services, the authorized distributo
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TABLE OF CONTENTS IMPORTANT SAFETY INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 SAVE THESE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 1.0 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 1.1 General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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2.6 Automatic Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 2.6.1 Overloads (Without Transfer) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 2.6.2 Automatic Transfers to Bypass (Overload Condition) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 2.6.3 Automatic Transfers to Bypass, UPS System Faults. . . . . . . . . . . . . . . . . . . . . . . .
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FIGURES Figure 1 Typical single module UPS system one-line diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Figure 2 Main component locations-225 to 300kVA Liebert NX. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Figure 3 Main components, 400-600kVA Liebert NX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Figure 4 Main display screen, typical. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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Important Safety Instructions IMPORTANT SAFETY INSTRUCTIONS SAVE THESE INSTRUCTIONS This manual contains important instructions that should be followed during installation of your Liebert NX UPS. Read this manual thoroughly, paying special attention to the sections that apply to your installation, before working with the UPS. Retain this manual for use by installing personnel. WARNING ! Risk of electric shock. Can cause equipment damage, injury or death. This UPS has several circuits that are
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Important Safety Instructions Battery Cabinet Precautions The following warning applies to all battery cabinets supplied with UPS systems. Additional warnings and cautions applicable to battery cabinets may be found in Important Safety Instructions on page 1 and 4.4 - Battery Maintenance. WARNING ! Risk of electric shock, fire and smoke. Can cause equipment damage, injury and death. Internal battery strapping must be verified by manufacturer prior to moving a battery cabinet after initial ins
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Introduction 1.0 INTRODUCTION 1.1 General Description The Liebert NX UPS provides continuous, high-quality AC power to your business-critical equipment, such as telecommunications and data processing equipment. The Liebert NX UPS supplies power that is free of the disturbances and variations in voltage and frequency common to utility power, which is subject to brownouts, blackouts, surges and sags. The Liebert NX utilizes the latest in high-frequency, double-conversion pulse-width modulation
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Introduction 1.2 Modes of Operation 1.2.1 Normal Mode Operating in normal mode, the Liebert NX’s rectifier derives power from a utility AC source and supplies regulated DC power to the inverter, which regenerates precise AC power to supply the connected equipment. The rectifier also uses the utility source power to charge the DC sources. 1.2.2 Bypass Mode When the Liebert NX is in bypass mode, the load is directly supported by utility power and is without DC source backup protection. ’ The Li
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Introduction 1.3 Options ® A number of options are available from Emerson for your UPS system. Some options are not available for all ratings. Described below are the most frequently provided options. Other options are available. Contact your Emerson sales representative for more information. • Battery and Racks—The batteries provide power in the event of a power outage. The Liebert NX UPS can use a variety of battery types, provided the battery plant is designed for the UPS DC voltage range
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Operation 2.0 OPERATION The Liebert NX UPS is equipped with a microprocessor-based display touchscreen designed for convenient and reliable operation. The display is driven by menu-prompted software. 2.1 Features The Liebert NX interface display enables the operator to perform such tasks as: • Quickly check operational status • Monitor the power flow through the UPS system and all meter readings • Execute operational procedures • Check status reports and event files • Adjustment programmable pa
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Operation Figure 3 Main components, 400-600kVA Liebert NX HMI Screen Main Input Circuit Breaker (CB1) Optional Backfeed Circuit Breaker (BFB) External Communication Panel FRONT DOORS REMOVED Bypass Busbars Ø A,B,C Rectifier Input Busbars Ø A,B,C Output Busbars Ø A,B,C Battery Busbars (+ / -) Input Ground Busbar DOORS AND INNER SKINS REMOVED ® ™ 7Liebert NX
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Operation Figure 4 Main display screen, typical 9 1 3 5 2 8 6 4 7 1. Bypass Input: voltage and frequency readings 4. Battery: voltage and current readings 2. Line power Input: voltage, current and fre- 5. System Status quency readings 6. Control Buttons 3. Output: voltage, current and frequency read- 7. Menu Buttons ings 8. Animated One Line Mimic 9. About Button Figure 5 Normal Mode Module Bypass UPS Module AC Input BFB Module Rectifier UPS Output AC Input DC Critical Bus Load To DC Supply Fig
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Operation Figure 7 Load on bypass Module Bypass UPS Module AC Input BFB Module Rectifier UPS Output DC Critical AC Input Bus Load To DC Supply 2.2 Touchscreen Navigation Several menu items can be accessed from the main display screen (see Figure 9). These menu items are detailed in subsequent sections. 2.2.1 Main Display Screen This is the default screen. It displays the following information: • Bypass Input Voltage • Bypass Input Frequency •Input Voltage • Input Current • Input Frequency • Ou
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Operation 2.2.2 Status This menu item displays a list of current Fault Warnings and Info. Figure 8 Status 2.2.3 Events Log Menu This menu item displays the list of Events that occurred recently while the UPS was in operation. 2.2.4 Measures Menu This menu item displays the full set of measurements for each functional block (rectifier, bypass, booster/charger, batteries, inverter and load). Table 1 Measurements for functional blocks Rectifier Bypass Inverter Chg/Boost Battery Load Booster Voltag
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Operation Figure 9 Measures menus 2.2.5 Battery Menu This menu item displays the battery status/parameters such as temperature, cell voltage, capacity and run time, as well as commands that enable the user to the user to configure and execute the battery test. Battery Status • Battery Status— Specify whether battery is charging or not • Charger Status—Specify Battery Charger status • Battery Test Status—Specify details of the last battery test ex
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Operation Battery Measures This section monitors variables applicable to the battery. Figure 10 Battery parameters ® ™ Liebert NX 12
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Operation 2.2.6 Life Menu This menu displays the information about the status of Liebert LIFE.net connections, status of calls and types of calls and allows certain specific commands to be executed. This button is not active if the LIFE.net option is not available on UPS. Figure 11 Life menu ® ™ 13 Liebert NX
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Operation 2.2.7 Settings Menu This menu item displays the LCD settings and selected language. Figure 12 Settings Menu 2.3 Animated One Line Mimic This displays all the functional blocks in the UPS. Touch any icon to obtain detailed information about the corresponding functional block. The color of the block identifies its functional status: • Green: Normal Conditions • Yellow: Warning Conditions • Red: Fault Conditions By clicking on a block, such as Rectifier or Inverter, the relevant page pro
