Page 2 - Contacting Liebert for Support; WARNING
B ATTERY C ABINET P RECAUTIONS The following warning applies to all battery cabinets supplied with UPS systems. Additional warn- ings and cautions applicable to battery cabinets may be found in Important Safety Instructions and 3.4 - Battery Maintenance . Contacting Liebert for Support Contact Emers...
Page 3 - TABLE OF CONTENTS
i TABLE OF CONTENTS B ATTERY C ABINET P RECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 IMPORTANT SAFETY INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11.0 I NTRODUCTION . . . . . . . . ...
Page 4 - ii; PPENDIX
ii 3.2 Liebert Services . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 3.2.1 Professional Startup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 3.3 Rou...
Page 5 - iii; FIGURES
iii FIGURES Figure 1 Typical UPS system one-line diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Figure 2 Main component locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ....
Page 6 - iv
Page 7 - SAVE THESE INSTRUCTIONS; nance of your Liebert NXL UPS and batteries.; when installing, charging or
1 I MPORTANT S AFETY I NSTRUCTIONS SAVE THESE INSTRUCTIONS This manual contains important instructions that should be followed during installation and mainte- nance of your Liebert NXL UPS and batteries. This equipment contains circuitry that is energized with high voltage. Only test equipment desig...
Page 8 - Introduction; NTRODUCTION; General Description; service to the maintenance bypass.; Figure 1; Modes of Operation; BFB
Introduction 2 1.0 I NTRODUCTION 1.1 General Description The Liebert NXL UPS provides continuous, high-quality AC power to your business-critical equip- ment, such as telecommunications and data processing equipment. The Liebert NXL UPS supplies power that is free of the disturbances and variations ...
Page 9 - Options; interrupt time setting.
Introduction 3 1.2.2 Bypass Mode When the Liebert NXL is in bypass mode, the load is directly supported by utility power and is with- out battery backup protection.The Liebert NXL’s inverter and bypass static switch will shift the load from the inverter to bypass mode without an interruption in AC p...
Page 10 - Load Bus Synchronization; —The Load Bus Sync (LBS) option keeps two independent UPS sys-; Customer Alarm Interface; —When the battery temperature exceeds a preset limit; Battery Load Testing; missioning when those options are active.
Introduction 4 • Load Bus Synchronization —The Load Bus Sync (LBS) option keeps two independent UPS sys- tems (and therefore their critical load buses) in sync, even when the modules are operating on bat- teries or asynchronous AC sources. This means that critical loads connected to both load buses ...
Page 11 - Operation; PERATION; Features; Figure 2
Operation 5 2.0 O PERATION The Liebert NXL UPS is equipped with a microprocessor-based display touchscreen designed for con- venient and reliable operation. The display is driven by an easy-to- follow, menu-prompted software. 2.1 Features The Liebert NXL interface display enables the operator to per...
Page 12 - Figure 3; —Displays the DC Bus voltage and the state of the battery charger.; Load; retransfer timeout is displayed at the bottom of the load box.
Operation 6 Figure 3 Main Display Screen, typical Figure 4 Mimic display Bypass Input —Displays the bypass input voltage and the bypass input frequency. The bypass cir- cuit breaker (BFB) is to the right of this block. The circuit breaker status is shown as open or closed. UPS Input Power —Displays ...
Page 13 - Figure 5
Operation 7 Figure 5 Monitor/mimic display example: Normal power flow Figure 6 Monitor/mimic display example: Utility fail Green – Normal Orange – Marginal Gray – Absent Black – Unknown Green – Normal Orange – Marginal Gray – Absent Black – Unknown
Page 14 - Figure 7
Operation 8 Figure 7 Monitor/mimic display example: Load on bypass, UPS On Figure 8 Monitor/mimic display example: Load on bypass, UPS module off Green – Normal Orange – Marginal Gray – Absent Black – Unknown Green – Normal Orange – Marginal Gray – Absent Black – Unknown
Page 15 - Touchscreen; Navigation; are detailed in subsequent sections.; Figure 9
Operation 9 2.2 Touchscreen Navigation 2.2.1 Main Display Screen Several menu items can be accessed from the main display screen (see Figure 3 ). These menu items are detailed in subsequent sections. Figure 9 Menu tree Liebert NXL Menu Help Menu Metering Silence Reset Configurations Status Reports S...
Page 16 - Rating; Figure 10 Rating Parameters
Operation 10 2.2.2 Configurations Menu Rating This menu item will display a popup showing the following parameters (see Figure 10 ). These parameters are entered during commissioning when the UPS is installed. Figure 10 Rating Parameters • Nominal Input Voltage • Unit Model • Nominal Bypass Voltage ...
Page 17 - User Settings; System Settings
Operation 11 User Settings System Settings These display settings can be changed from the touchscreen. Press the box to the left of each parame- ter to bring a popup window that will allow the parameter to be changed. • Backlight Brightness—High or Low (default: Low)• Time (24hr format)—Adjust Hour,...
Page 18 - Adjustable Setpoints; Figure 12 Adjustable setpoints parameters; Temperature will display in both Celsius and Fahrenheit.
Operation 12 Adjustable Setpoints These warning and alarm settings can be changed from the touchscreen. Press the box to the left of each parameter to bring a popup window that will allow the parameter to be changed. Max Load Alarm • Phase A (%)—10% to 105% (default: 95%)• Phase B (%)—10% to 105% (d...
Page 19 - minimum voltage the battery test will stop.; Figure 13 Battery Management Parameters
Operation 13 Battery Test • Auto Test—Enable/Disable (default: disabled)• Test Cycle, weeks—1 to 26 (default: 13 weeks)• Time of day, hh:mm—Set Hour and Minute; sets the start time of the automatic battery test • Start Date, mm dd, yyyyy—Set Month, Day and Year• Test Duration, minutes—Automatic, 0.5...
Page 20 - Event Management; Table 7; You must press “Save” for changes to take effect.
Operation 14 Event Management This menu item permits changing how the Liebert NXL handles Alarms, Faults and Status informa- tion. Each event can be configured for the following: • Latch (yes/no)—Event stays active in the event window, even if the fault condition has been cleared, until user acknowl...
Page 21 - This menu permits shutting down the UPS and individual devices.; Figure 15 Shutdown menu; —Open the input trap filter; UPS; NOTICE; Figure 17 System shutdown popup
Operation 15 2.2.5 Shutdown Menu This menu permits shutting down the UPS and individual devices. Figure 15 Shutdown menu Open Trap —Open the input trap filter Open MBD/BCB —Opens the associated MBD or BCB breaker UPS —Turns off inverter, rectifier and trips all battery breakers. Transfers to bypass,...
Page 22 - Bypass; will switch the UPS to Bypass mode. Pressing
Operation 16 2.2.6 Transfer Menu This menu permits switching between UPS and Bypass mode. A graph in the multipurpose window shows if the UPS is in synch with the bypass. If the UPS and bypass are in synch, pressing Bypass will switch the UPS to Bypass mode. Pressing UPS will switch back to Normal (...
Page 23 - Time Remaining Graph
Operation 17 2.2.7 Battery Management Menu This menu permits configuring battery settings. Time Remaining Graph —Displays the time remaining graph in the multipurpose window; plot the battery voltage against elapsed time during a Battery Discharge Cycle (see Figure 19 ). Figure 19 Time remaining dis...
Page 24 - Figure 20 Battery cycle monitor
Operation 18 Figure 20 Battery cycle monitor Display summary (see Figure 21 ) • Battery Commission Date/Time• Last Battery Discharge Date/Time• Active Battery Discharge Time• Active Battery Amp Hours• Active Battery KW• Total Number of Discharges Figure 21 Battery cycle monitor summary
Page 25 - Clear Log; Figure 23 Load on bypass (UPS not available)
Operation 19 Clear Log —This command resets the Date of First Discharge Cycle. A dialog box will warn that the data will be permanently lost and should downloaded before proceeding (see Figure 22 ). Figure 22 Battery cycle monitor—clear log 2.2.8 Metering This button will place the metering tables i...
Page 26 - ). If no alarm is displayed, the operating status is Load On UPS; Transfer Procedures; than five minutes. Refer to; Figure 24 Load on bypass, UPS available
Operation 20 2.3.2 OK to Transfer The OK to Transfer status message will be displayed when the bypass line and UPS output power are both available, their voltage, frequency and phase synchronization are matched within specifications, and the Static Switch Disconnects are closed (ON). An alarm messag...
Page 27 - Input Power Failure—Load on Battery; Figure 26 Input power fail, load on battery
Operation 21 2.3.3 Input Power Failure—Load on Battery If the utility AC power source fails or is outside the acceptable range, the battery plant becomes the power source for the UPS module inverters. The UPS continues to supply power to the critical load and also to the UPS controls.Use the Battery...
Page 28 - Figure 27 Load on UPS, battery not available; and output circuit breakers will be opened (tripped). Refer to; Figure 28 Emergency modules off; CAUTION; Battery
Operation 22 2.3.4 Off Battery The battery plant can be disconnected from the UPS, if required for battery maintenance, by opening the module battery disconnect (MBD) circuit breaker. In this situation the UPS module will continue to supply conditioned power to the critical load, but if input power ...
Page 29 - Figure 29 Remote emergency power off; Manual Procedures; . Other procedures must be performed manually.; Input
Operation 23 2.3.6 Remote Emergency Power Off The Remote Emergency Power Off (REPO) mode will transfer the critical load to the bypass line and remove power from all UPS module components except the controls, bypass circuit breaker and the static switch.The Remote Emergency Power Off control is a us...
Page 30 - turn off control power (see
Operation 24 2.4.1 Startup Procedure If your installation includes a Maintenance Bypass, you may already be supplying power to the criti- cal load equipment through the Maintenance Bypass. If there is no power to the critical load, apply power through the UPS bypass line per the following procedure....
Page 31 - This will start the UPS’ rectifier. Load is still on internal bypass.; Figure 30 Startup commands; recharge current limit.; about equalize charging.
Operation 25 e. The “Close CB1” message will appear. Close CB1 (see Figure 2 ) f. The “Press OK to Issue Rectifier On Command” message will appear. Press “OK” This will start the UPS’ rectifier. Load is still on internal bypass. g. The “Press OK to Issue Inverter On Command” message appears. Press “...
Page 32 - initiate automatic load transfers and retransfers. Refer to; Transfer Procedure; transfer the load from UPS to Bypass.; Re-Transfer Procedure; transfer the load from Bypass to UPS; Figure 31 UPS with two-breaker bypass cabinet
Operation 26 2.4.2 Load Transfer Procedures Changing the load from the UPS system to the UPS bypass is called a transfer. Changing the load from UPS bypass to the UPS system is called a retransfer. Note that the UPS system control logic can initiate automatic load transfers and retransfers. Refer to...
Page 33 - the critical load may be lost.; Maintenance Bypass Load Transfers—If Load is on UPS Bypass; load, and the load is now on Maintenance Bypass.; NOTE
Operation 27 NOTICE Risk of equipment damage. The UPS system must be on internal bypass before performing the following procedures and operating MIB or MBB, or damage to the UPS may occur and the critical load may be lost. Maintenance Bypass Load Transfers—If Load is on UPS Bypass 1. If the maintena...
Page 34 - Shutdown Procedures; to bypass if available
Operation 28 2.5 Shutdown Procedures 2.5.1 Module Shutdown Procedure Perform a Module Shutdown Procedure when you want to remove power from a UPS module.Read all warnings in 3.0 - Maintenance before performing any maintenance on your Liebert NXL UPS. These warnings and cautions must be observed duri...
Page 35 - Figure 32 Current-versus-time curves of overload capacity; Load On Bypass is illustrated in; Automatic Transfers to Bypass, UPS System Faults; an interrupted load transfer is a very unlikely occurrence.
Operation 29 Figure 32 Current-versus-time curves of overload capacity 2.6.2 Automatic Transfers to Bypass (Overload Condition) The UPS system will initiate an automatic load transfer to the bypass line if an overload condition exceeds the current-versus-time curve of overload capacity or if specifi...
Page 37 - Maintenance; AINTENANCE; Safety Precautions; Observe the safety precautions in; Battery Cabinet Precautions; inside the front cover.; others approved for use in fighting electrical fires.; familiar with the circuitry.
Maintenance 31 3.0 M AINTENANCE 3.1 Safety Precautions Observe the safety precautions in Battery Cabinet Precautions inside the front cover. Observe ALL of the WARNINGS below before performing ANY maintenance on the UPS System and associated equipment. Also observe the manufacturer’s safety precauti...
Page 38 - Liebert Services; UPS Startup; Maintenance Agreements: The Signature Program; UPS Service Agreements; Training; Routine Maintenance
Maintenance 32 3.2 Liebert Services Startup, UPS maintenance, battery maintenance and training programs are available for the Liebert NXL UPS through your Liebert sales representative. 3.2.1 Professional Startup UPS Startup —Liebert’s Customer Engineers perform a thorough non-powered inspection of t...
Page 39 - —Troubleshooting is easier if you have historical background.
Maintenance 33 The UPS is designed for unattended operation, but does require some common-sense maintenance. • Keep good records —Troubleshooting is easier if you have historical background. • Keep it clean —Maintain the UPS free of dust and any moisture. • Keep it cool —Battery systems must be kept...
Page 40 - Battery Maintenance; Table 1; Component
Maintenance 34 3.3.3 Limited Life Components The Liebert NXL UPS has a design life well in excess of 10 years. Well-maintained units can continue to provide economic benefits for 20 years or more. Long-life components are used in the UPS wherever practical and cost-effective. However, due to the cur...
Page 41 - following procedures should be followed:
Maintenance 35 3.4.1 Battery Safety Precautions Servicing of batteries should be performed or supervised by personnel knowledgeable of batteries and the required precautions. Keep unauthorized personnel away from batteries.When replacing batteries, use the same number and type of batteries. Lead-aci...
Page 42 - to maintain flooded type battery cells at full capacity.; Matching Battery Cabinets—Optional; Voltage Records; than the retorque value.; Table 8; shows battery retorque values.; Table 2; Enersys
Maintenance 36 Because individual battery characteristics are not identical and may change over time, the UPS mod- ule is equipped with circuitry to equalize battery cell voltages. This circuit increases charging voltage to maintain flooded type battery cells at full capacity. Matching Battery Cabin...
Page 43 - Rack-Mounted Batteries; Table 4; Detecting Trouble; Items to check include:
Maintenance 37 Rack-Mounted Batteries If the UPS system uses a battery other than a factory-supplied Matching Battery Cabinet, perform maintenance on the battery as recommended in the battery manufacturer’s maintenance manual, available on the manufacturer’s Web site. 3.4.2 Torque Requirements All e...
Page 44 - Reporting a Problem; Upstream Feeder Circuit Breaker Setting Inspections
Maintenance 38 3.6 Reporting a Problem If a problem occurs within the UPS, review all alarm messages along with other pertinent data. Con- tact Liebert Services at 1-800-LIEBERT to report a problem or to request assistance. 3.7 Corrective Actions For each alarm message on the Display Screen, you can...
Page 45 - SPECIFICATIONS; PECIFICATIONS; Battery Operation; depending on the application.; Environmental Conditions; Notes on Environmental Specifications; of excess moisture and contaminants.; Table 5; Parameter
SPECIFICATIONS 39 4.0 S PECIFICATIONS 4.1 Battery Operation The separate battery manufacturer’s manual, available on the manufacturer’s Web site, provides the necessary information for the installation, operation and maintenance of the battery. Use the battery manual in conjunction with this manual....
Page 46 - Table 6; Liebert NXL Model Size
SPECIFICATIONS 40 Table 6 Electrical specifications Liebert NXL Model Size 250 300 400 Input Parameters Input Voltage to Rectifier, VAC 480V 3-phase, 3-wire Input Voltage to Bypass, VAC 480V 3-phase, 3- or 4-wire Permissible Input Voltage Range, VAC 70% to 110% Input Frequency, Hz 60 Permissible Inp...
Page 47 - System Parameter
SPECIFICATIONS 41 System Parameter UPS Efficiency AC-AC 100% Load, % 93.9% 94% 94.2% UPS Efficiency AC-AC 50% Load, % 93.2% 93.3% 93.4% Physical Parameters & Standards, in (mm) Width 71.8 (1823) 78.5(1993) 78.5(1993) Depth 33.5 (850) 33.5 (850) 39.4 (1000) Height 76.8 (1950) Weight, lb (kg) appr...
Page 49 - UPS Alarm and Status Messages; Event Message
UPS Alarm and Status Messages 43 A PPENDIX A - UPS A LARM AND S TATUS M ESSAGES Table 7 shows alarm and status messages as they appear in Liebert NXL’s touchscreen and in the history log, along with a description and recommended actions, if any.If the recommended action fails to correct the conditio...
Page 69 - NOTES
Page 72 - AC Power
EmersonNetworkPower.com Ensuring The High Availability0f Mission-Critical Data And Applications. Emerson Network Power, the global leader in enabling business-criticalcontinuity, ensures network resiliency and adaptability througha family of technologies—including Liebert power and coolingtechnologi...
