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AC Power
For Business-Critical Continuity™
™
Liebert NX UPS
User Manual–40-120kVA, 480V, 60Hz
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TABLE OF CONTENTS IMPORTANT SAFETY INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 GLOSSARY OF SYMBOLS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 1.0 INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 1.1 External Inspections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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3.4 Non-Standard Batteries. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 3.5 BCB Shunt Trip . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 3.6 Alber Monitoring System—Optional. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 4.0 OPTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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8.10 Current Date and Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65 8.11 UPS Status Messages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66 8.12 Types of LCD Screens . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67 8.12.1 Opening Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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11.0 SPECIFICATIONS AND TECHNICAL DATA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .88 11.1 Lug Size and Torque Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88 11.2 Cable Lengths: Floor to Connection Point Inside UPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88 11.3 Cable size and tightening torques . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90 1
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Figure 41 Mimic display indicators location. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58 Figure 42 Location of control buttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59 Figure 43 Buzzer location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60 Figure 44 Sections of the LCD. . . . . .
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Table 29 Lead/Lag ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90 Table 30 Cable size tightening torque at Liebert NX 40kVA UPS terminals. . . . . . . . . . . . . . . . . . . . . . . . 90 Table 31 Cable size tightening torque at Liebert NX 60kVA UPS terminals. . . . . . . . . . . . . . . . . . . . . . . . 90 Table 32 Cable size tightening torque at Liebert NX 80kVA UPS terminals. . . . . . . . . . . . . .
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IMPORTANT SAFETY INSTRUCTIONS SAVE THESE INSTRUCTIONS This manual contains important instructions that should be followed during installation of your ™ Liebert NX UPS and ancillary equipment. 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 ! Exercise extreme care when handling UPS cabinets to avoid equipment damage or injury to personnel. The UPS modu
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WARNING ! Under typical operation and with all UPS doors closed, only normal safety precautions are necessary. The area around the UPS system should be kept free of puddles of water, excess moisture and debris. Special safety precautions are required for procedures involving handling, installation and maintenance of the UPS system and the batteries. Observe all safety precautions in this manual before handling or installing the UPS system. Observe all precautions in this manual, before as w
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GLOSSARY OF SYMBOLS Risk of electrical shock Indicates caution followed by important instructions ! AC input AC output Requests the user to consult the manual i - + Indicates the unit contains a valve-regulated lead acid battery PbH2SO4 R Recycle DC voltage Equipment grounding conductor Bonded to ground AC voltage 3
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Installation 1.0 INSTALLATION Liebert’s NX Uninterruptible Power Supply system 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 fre- quency 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 modu
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Installation 1.2 Internal Inspections 1. Remove any packaging material, then visually examine the UPS and battery equipment for transit damage, both internally and externally. Report any such damage to the shipper and to Liebert immediately. 2. Check the nameplate inside the cabinet door to verify that the model number and rating correspond to the ones specified. Record the model number and serial number in the front of this installation manual. This information is necessary should service b
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Installation Battery Location Batteries must be installed in Liebert NX 480V battery cabinets or battery room. Temperature is a major factor in determining battery life and capacity. Battery manufacturers recommend an operat- ing temperature of 77°F (25°C). Ambient temperatures higher than this reduce battery life; tempera- tures lower than this reduce battery capacity. In a typical installation, battery temperature should be maintained between 74°F and 80°F (23-27°C). Batteries should be plac
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Installation 1.6.1 Clearances There are no ventilation grilles on the sides or rear of the UPS. The unit may be placed with the rear against a wall and optional cabinets on either side. To enable routine tightening of power terminations within the UPS, make sure there is sufficient clearance in front of the Liebert NX to permit free passage of personnel with the door fully opened. Leave a minimum of 8 in. (203mm) between the top of the UPS and the ceiling to permit adequate air circulation ab
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Installation Figure 1 Cabinet arrangement—Liebert NX units and battery cabinets Liebert Liebert Battery Battery NX NX Cabinet Cabinet UPS UPS Front of Units Front of Units Liebert Liebert Battery Battery Battery Battery Battery Battery NX NX Cabinet Cabinet Cabinet Cabinet Cabinet Cabinet UPS UPS Front of Units Front of Units Liebert Liebert Liebert Liebert Battery Battery Multi-Module Battery Battery NX NX NX NX Cabinet Cabinet Parallel Cabinet Cabinet Cabinet UPS UPS UPS UPS Front of Units 8
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Installation Figure 2 Cabinet arrangement—Liebert NX units, battery cabinets and Liebert FPC Liebert Liebert Liebert Liebert Foundation Battery Battery Foundation NX NX Cabinet Cabinet Power Power UPS UPS Center Center Front of Units Front of Units Liebert Liebert Liebert Liebert Battery Battery Battery Battery Battery Battery Foundation Foundation NX NX Cabinet Cabinet Cabinet Cabinet Cabinet Cabinet Power Power UPS UPS Center Center Front of Units Front of Units Liebert Multi-Module Lie
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Electrical Connections 2.0 ELECTRICAL CONNECTIONS The UPS requires both power and control cabling once it has been mechanically installed. All control cables must run separate from power cables in metal conduits or metal ducts that are electrically bonded to the metalwork of the cabinets to which they are connected. WARNING ! Before connecting input power to the Liebert NX, ensure that you are aware of the location and operation of the overcurrent protection devices that connect the UPS input
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Electrical Connections 2.1.2 UPS Input Configuration Figure 3 illustrates the Liebert NX in a split bypass (dual-input) configuration. In this configuration the Static Bypass and the Maintenance Bypass lines are supplied from a separate feed from the Main input. Both sources must be protected externally with properly sized protective devices. By default, the unit ships with internal links installed between the bypass input and main input (Single Input configuration). To wire the unit as a du
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Electrical Connections 2.1.4 Cable Connections The rectifier input, bypass and output are easily accessible from the front of the unit for installation. All require lug type terminations. They are connected to busbars on the front side of the Liebert NX and below the circuit breaker, as shown in Figure 4. These busbars are accessible when the front side panel is removed. Busbars to connect external batteries are accessible from the front of the UPS. NOTE External connection access requires re
