Emerson Liebert NXL series Operation And Maintenance Manual
  1. Manuals
  2. Brands
  3. Emerson Manuals
  4. UPS
  5. Liebert NXL series
  6. Operation and maintenance manual
Emerson Liebert NXL series Operation And Maintenance Manual

Emerson Liebert NXL series Operation And Maintenance Manual

250 to 800kva, 50/60hz, three phase single-module and 1+n
Hide thumbs
Table of Contents

Advertisement

Quick Links

Download this manual
Liebert
NXL
®
™
Operation and Maintenance Manual – 250 to 800kVA, 50/60Hz, Three Phase Single-Module and 1+N
AC Power
For Business-Critical Continuity

Advertisement

Table of Contents
loading

Related Manuals for Emerson Liebert NXL series

Summary of Contents for Emerson Liebert NXL series

  • Page 1 AC Power For Business-Critical Continuity Liebert ® ™ Operation and Maintenance Manual – 250 to 800kVA, 50/60Hz, Three Phase Single-Module and 1+N...
  • Page 2 Page ii...
  • Page 3 It is our constant endeavour to partner you to ensure the growth & success of your business; our philosophy is reflected in our mission statement “Keeping Business in Business”. Please give us your valued feedback to help us realise our mission. EMERSON NETWORK POWER Page iii...
  • Page 4 Emerson Network Power, its subsidiaries or employees for any direct or indirect loss or damage caused by omissions from or inaccuracies in this document. Emerson Network Power reserves the right to change details in this publication without notice. Page iv...

  • Page 5: Table Of Contents

    Liebert NXL UPS Operation and Maintenance Manual 250-300-400-800kVA -----------------------------------------------Table of Contents ----------------------------------------------- Table of Contents---------------------------------------------- ---------------------------------------------- ----------------------------------------------- ----------------------------------------------- Table of Contents Table of Contents ---------------------------------------------- ---------------------------------------------- INTRODUCTION......................11 General Description............................ 11 Modes of Operation ............................ 11 1.2.1 Normal Mode ............................11 1.2.2 Bypass Mode............................
  • Page 6 Liebert NXL UPS Operation and Maintenance Manual 250-300-400-800kVA MAINTENANCE ......................57 Safety Precautions ............................57 Liebert Services............................58 3.2.1 Professional Start-up ..........................58 Routine Maintenance..........................59 3.3.1 Record Log .............................. 59 3.3.2 Air Filters..............................59 3.3.3 Limited Life Components ........................60 Battery Maintenance ..........................
  • Page 7 Liebert NXL UPS Operation and Maintenance Manual 250-300-400-800kVA Figure 24 Time remaining display ..................32 Figure 25 Battery cycle monitor................... 33 Figure 26 Battery cycle monitor summary ................. 34 Figure 27 Battery cycle monitor—clear log ................ 34 Figure 28 Load on bypass (UPS not available)..............35 Figure 29 Load on bypass, UPS available................
  • Page 8 250-300-400-800kVA This manual contains information concerning the operation and maintenance of the Liebert NXL Series Uninterruptible Power System (UPS) and batteries. All relevant parts of the manual should be read prior to commencing installation. The UPS must be commissioned and serviced by an engineer approved by the manufacturer (or his agent).Failure to do could result in personnel safety risk,...
  • Page 9 Liebert NXL UPS Operation and Maintenance Manual 250-300-400-800kVA SUPPORT INFORMATION: For repair or maintenance service, contact Liebert Services, if available in your area. For areas not covered by Liebert Services, the authorized distributor is responsible for providing qualified, factory-authorized service. If you require assistance for any reason, please have the following information available: Model and size...

  • Page 10: Save These Instructions

    Liebert NXL UPS Operation and Maintenance Manual 250-300-400-800kVA MPORTANT AFETY NSTRUCTIONS SAVE THESE INSTRUCTIONS This manual contains important instructions that should be followed during installation and maintenance of your Liebert NXL™ UPS and batteries. Retain this manual for use by installing personnel. WARNING Risk of electrical shock.

  • Page 11: Introduction

    Liebert NXL UPS Operation and Maintenance Manual 250-300-400-800kVA 1 INTRODUCTION 1.1 General Description The Liebert NXL UPS provides continuous, high-quality AC power to your business-critical equipment, such as telecommunications and data processing equipment. The Liebert NXL 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.

  • Page 12: Bypass Mode

    Liebert NXL UPS Operation and Maintenance Manual 250-300-400-800kVA 1.2.2 Bypass Mode When the Liebert NXL is in bypass mode, the load is directly supported by utility power and is without 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 power if the inverter is synchronous with the bypass and any of the following occurs: •...

  • Page 13: Options

    Liebert NXL UPS Operation and Maintenance Manual 250-300-400-800kVA 1.3 Options A number of options are available from Liebert for your UPS system. (Some options are not available for all ratings.) Described below are the most frequently provided options. The first three battery items are required to complete the UPS system.

  • Page 14: Operation

    Liebert NXL UPS Operation and Maintenance Manual 250-300-400-800kVA 2 OPERATION The Liebert NXL UPS is equipped with a microprocessor-based display touchscreen designed for convenient 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 perform such tasks •...

  • Page 15: Figure 2 Main Component Locations

    Liebert NXL UPS Operation and Maintenance Manual 250-300-400-800kVA 1: Input isolator (Q1) 2: Bypass isolator (Q2) 3: Maintenance bypass isolator (Q3) 4: Output isolator (Q4) 5: Options box (Intellislot housings) 6: HMI Screen : External interface board (EIB) 250-300-400kVA : Emergency Power OFF (EPO) Figure 2 Main component locations 800kVA...

  • Page 16: Figure 3 Main Display Screen, Typical

    Liebert NXL UPS Operation and Maintenance Manual 250-300-400-800kVA Load Figure 3 Main Display screen, typical Bypass UPS input input power Battery block Figure 4 Mimic display Bypass Input —Displays the bypass input voltage and the bypass input frequency. The bypass isolator (Q2) is shown as open or closed. UPS Input Power —Displays the UPS input voltage, current and frequency.

  • Page 17: Figure 5 Monitor/Mimic Display Example: Normal Power Flow

    Liebert NXL UPS Operation and Maintenance Manual 250-300-400-800kVA Line colour – means: Green – Normal Orange – Marginal Gray – Absent Black - Unknown Figure 5 Monitor/mimic display example: Normal power flow Figure 6 Monitor/mimic display example: Utility fail Page 17...

  • Page 18: Figure 7 Monitor/Mimic Display Example: Load On Bypass, Ups On

    Liebert NXL UPS Operation and Maintenance Manual 250-300-400-800kVA Figure 7 Monitor/mimic display example: Load on bypass, UPS On Line colour – means: Green – Normal Orange – Marginal Gray – Absent Black - Unknown Figure 8 Monitor/mimic display example: Load on bypass, UPS module Off Page 18...

  • Page 19: Touchscreen Navigation

    Liebert NXL UPS Operation and Maintenance Manual 250-300-400-800kVA 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 2.2.2 Help This button will display the help menu.

  • Page 20: Configurations Menu

    Liebert NXL UPS Operation and Maintenance Manual 250-300-400-800kVA 2.2.6 Configurations Menu 2.2.6.1 2.2.6.1 2.2.6.1 2.2.6.1 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.

  • Page 21: Figure 11 System Settings Parameters

    Liebert NXL UPS Operation and Maintenance Manual 250-300-400-800kVA 2.2.6.2 2.2.6.2 2.2.6.2 2.2.6.2 System Settings User Settings These display 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. •...

  • Page 22: Figure 12 Adjustable Setpoints Parameters

    Liebert NXL UPS Operation and Maintenance Manual 250-300-400-800kVA 2.2.6.3 2.2.6.3 2.2.6.3 2.2.6.3 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.

  • Page 23: Figure 13 Battery Equalize Settings

    Liebert NXL UPS Operation and Maintenance Manual 250-300-400-800kVA 2.2.6.4 2.2.6.4 2.2.6.4 2.2.6.4 Battery Management These battery 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. Battery Equalize •...
  • Page 24 Liebert NXL UPS Operation and Maintenance Manual 250-300-400-800kVA Low Battery Warning Time • Low Battery Warning Time, minutes—2 to 15, depending on configured batteries (default: 5 minutes) Battery Temperature • Battery Temp Warning—30°C to 50°C (default: 40°C) • Battery Temp Limit—35°C to 60°C (default: 50°C) •...

  • Page 25: Figure 15 Typical Event Management Parameters

    Liebert NXL UPS Operation and Maintenance Manual 250-300-400-800kVA 2.2.6.5 2.2.6.5 2.2.6.5 2.2.6.5 Event Management This menu item permits changing how the Liebert NXL handles Alarms, Faults and Status information. 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 acknowledges it by pressing the “Reset”...

  • Page 26: Figure 16 Load Bus Sync Screen

    Liebert NXL UPS Operation and Maintenance Manual 250-300-400-800kVA 2.2.6.6 2.2.6.6 2.2.6.6 2.2.6.6 LBS and Internal Options NOTE These items must be enabled by service to be functional. Load Bus Synch —Enable/Disable (default: disable) Figure 16 Load Bus Sync (not available on the display screen) Input Contact Isolator Board •...

  • Page 27: Figure 18 Programmable Relay Board Screen

    Liebert NXL UPS Operation and Maintenance Manual 250-300-400-800kVA Programmable Relay Board • Assignment—0 to 4 event (default: 0) • Delay, sec—0 to 99.9 (default: 0) Figure 18 Programmable Relay Board screen Page 27...

  • Page 28: Status Reports Menu

    Liebert NXL UPS Operation and Maintenance Manual 250-300-400-800kVA 2.2.7 Status Reports Menu This menu accesses the events records. 2.2.7.1 2.2.7.1 2.2.7.1 2.2.7.1 Event Log • Event Log—Up to 2048 time/date stamped events are captured in the log. The oldest record will be overwritten with a new record once the buffer reaches 2048 events. Figure 19 Event Log 2.2.7.2 2.2.7.2...

  • Page 29: Startup Menu

    Liebert NXL UPS Operation and Maintenance Manual 250-300-400-800kVA 2.2.8 Startup Menu This menu is used to start the UPS and individual devices. 2.2.8.1 2.2.8.1 2.2.8.1 2.2.8.1 Manual start-up Manual—This will begin the UPS startup. See 2.5 - Manual Procedures for details. 2.2.8.2 2.2.8.2 2.2.8.2...

  • Page 30: Figure 21 Ups Shutdown Popup

    Liebert NXL UPS Operation and Maintenance Manual 250-300-400-800kVA 2.2.9.3 2.2.9.3 2.2.9.3 2.2.9.3 INV/RECT/BCB OFF UPS—Turns off inverter, rectifier and trips all battery breakers. Transfers to bypass, if available. NOTE The following popup window is displayed when the UPS is about to be shut down. To shut down the UPS, an operator must press OK.

  • Page 31: Transfer Menu

    Liebert NXL UPS Operation and Maintenance Manual 250-300-400-800kVA 2.2.10 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.

  • Page 32: Figure 24 Time Remaining Display

    Liebert NXL UPS Operation and Maintenance Manual 250-300-400-800kVA Figure 24 Time remaining display 2.2.11.2 2.2.11.2 2.2.11.2 2.2.11.2 Manual Battery Test Manual Battery Test — Start/Stop 2.2.11.3 2.2.11.3 2.2.11.3 2.2.11.3 Manual Battery Equalize Manual Battery Equalize — For Service only. 2.2.11.4 2.2.11.4 Commissioning 2.2.11.4 2.2.11.4...

  • Page 33: Figure 25 Battery Cycle Monitor

    Liebert NXL UPS Operation and Maintenance Manual 250-300-400-800kVA 2.2.11.5 2.2.11.5 2.2.11.5 2.2.11.5 Battery Cycle Monitoring Battery Cycle Monitor — Displays how many discharges have occurred for these time periods: 0-30sec, 31-90sec, 91-240sec, 4-15min, 15-30min, 30-60min, 60-240min, 4-8hrs, 8hrs and up. Each discharge record will include: (see Figure 25) •# •Max KW •Date...

  • Page 34: Figure 26 Battery Cycle Monitor Summary

    Liebert NXL UPS Operation and Maintenance Manual 250-300-400-800kVA Display summary (see Figure 26) • 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 26 Battery cycle monitor summary Clear Log —...

  • Page 35: Modes Of Operation

    Liebert NXL UPS Operation and Maintenance Manual 250-300-400-800kVA 2.3 Modes of Operation This section illustrates the flow of power through disconnectors, switches and UPS components during various modes of operation. The same modes of operation apply to all configurations of the Liebert NXL. Highlighted (thick) lines in the diagrams indicate power flow and power availability.

  • Page 36: Ok To Transfer

    Liebert NXL UPS Operation and Maintenance Manual 250-300-400-800kVA 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).

  • Page 37: Off Battery

    Liebert NXL UPS Operation and Maintenance Manual 250-300-400-800kVA Use the Battery Time screen at the UPS modules to monitor the present battery voltage compared to the shutdown value. The time the battery can sustain the load depends on the size of the load and the size and condition of the battery plant. Alarm messages that indicate battery status are Battery Discharge, Low Battery and Battery Shutdown.

  • Page 38: Emergency Power Off (Epo)

    Liebert NXL UPS Operation and Maintenance Manual 250-300-400-800kVA 2.3.5 Emergency Power Off (EPO) The local Emergency Power Off (EPO) action shuts down the rectifier, inverter and static bypass and trips the battery circuit breaker. It does not however internally disconnect the input mains supply.

  • Page 39: Manual Procedures

    Liebert NXL UPS Operation and Maintenance Manual 250-300-400-800kVA 2.4 Manual Procedures The Liebert NXL UPS is designed to function while unattended by an operator. Many important functions are handled automatically by the system control logic, as explained in 2.6 - Automatic Operations. Other procedures must be performed manually. Manual procedures available to the operator include Start-up, Load Transfers and Shutdowns.
  • Page 40 Liebert NXL UPS Operation and Maintenance Manual 250-300-400-800kVA During start-up, power is supplied to the critical load through the UPS (internal) bypass line while the UPS system is being energized. Depending on the reason for the UPS system shutdown, power may be present in the bypass line. To determine this, check the Monitor/Mimic Display screen after control power is available.
  • Page 41 Liebert NXL UPS Operation and Maintenance Manual 250-300-400-800kVA 3) If the bypass line is not supplying the load, energize the bypass line by: a) Closing the Bypass Input Breaker (BIB), external to the UPS. This breaker may be in the Maintenance Bypass Cabinet. The display touch screen should start up.

  • Page 42: Load Transfer Procedures

    Liebert NXL UPS Operation and Maintenance Manual 250-300-400-800kVA Figure 35 Start-up commands 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.

  • Page 43: Maintenance Bypass Load Transfers

    Liebert NXL UPS Operation and Maintenance Manual 250-300-400-800kVA 2.4.3 Maintenance Bypass Load Transfers To manually transfer the load between Maintenance Bypass and the UPS bypass line, carefully follow these instructions. Do not transfer the load between Maintenance Bypass and the UPS module (inverter) output. Use the Monitor/Mimic Display screen to verify the UPS bypass line is available.
  • Page 44 Liebert NXL UPS Operation and Maintenance Manual 250-300-400-800kVA 2.4.3.1 2.4.3.1 2.4.3.1 2.4.3.1 Maintenance Bypass Load Transfers—If Load is on UPS Transfer the UPS system to bypass (see 2.4.2.1 - Load Transfer Procedures). Close the Maintenance Bypass Isolator (Q3). NOTE Failure to close the Maintenance Bypass Isolator (Q3) will interrupt power to the load.

  • Page 45: Shutdown Procedures

    Liebert NXL UPS Operation and Maintenance Manual 250-300-400-800kVA 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.

  • Page 46: Automatic Operations

    Liebert NXL UPS Operation and Maintenance Manual 250-300-400-800kVA 2.6 Automatic Operations The Liebert NXL UPS system is designed to function while unattended by an operator. The system control logic monitors the performance of the UPS, the availability of power sources and the current required by the critical load.

  • Page 47: Automatic Transfers To Bypass (Overload Condition)

    Liebert NXL UPS Operation and Maintenance Manual 250-300-400-800kVA 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 specified UPS system faults occur.

  • Page 48: Automatic Retransfers To Ups

    Liebert NXL UPS Operation and Maintenance Manual 250-300-400-800kVA 2.6.4 Automatic Retransfers to UPS The following critical bus conditions must be present to initiate an automatic retransfer of the critical load from the bypass source to the UPS inverter: Critical load was initially transferred to the bypass source due to a system overload only.

  • Page 49: 1+N System Operating Procedures

    Liebert NXL UPS Operation and Maintenance Manual 250-300-400-800kVA 2.7 1+N System Operating Procedures WARNING If the input of UPS use RCD, only use the public electric devices in the system when bypass is utility. At the instant of electrical connection, the current may not be split instantaneously and this may cause the residual current circuit breakers (RCCB) to trip separately.

  • Page 50: Figure 38 Manual Start To Bypass

    Liebert NXL UPS Operation and Maintenance Manual 250-300-400-800kVA Figure 38 Manual Start to Bypass After pressed the OK button, then can choose this module (only start this module on bypass) and all modules (start all modules on bypass), as shown in figure below. Figure 39 Manual Start to Bypass (one or more modules) Press either “All Modules”...

  • Page 51: Figure 40 Rectifier On Command

    Liebert NXL UPS Operation and Maintenance Manual 250-300-400-800kVA Figure 40 Rectifier ON command Start rectifier: After bypass started, then enter the process of starting rectifier on the LCD, as shown in figure above (Rectifier section will be green). Press Ok button, then rectifier start as shown in figure below. Figure 41 Load on Bypass, UPS available Page 51...

  • Page 52: Figure 42 Load On Bypass, Bcb Closed

    Liebert NXL UPS Operation and Maintenance Manual 250-300-400-800kVA Connect battery: After inverter started, you can enable the BCB (named MBD1) through the LCD, as shown in figure above. If an elec-trip breaker is used, when you press OK button the battery will be connected into UPS system. Otherwise if manual breaker is used, when you press OK button the system will show that you can manually close the BCB.

  • Page 53: Figure 44 Parallel System View

    Liebert NXL UPS Operation and Maintenance Manual 250-300-400-800kVA After that, you can press the ”System View” button located on the top right corner of LCD and view the whole parallel system status. In the figure below are shown the breakers of the System Paralleling cabinet option (the figure below is for ‘1+1’...

  • Page 54: Cut Off And Separate One Ups Module From The Running Parallel System

    Liebert NXL UPS Operation and Maintenance Manual 250-300-400-800kVA 2.7.5 Cut off and separate one UPS module from the running parallel system Open all breakers of battery. Open all UPS breakers one by one, Q4 (output breaker), Q1 (input breaker), Q2 (bypass breaker).

  • Page 55: Figure 45 Starting 1+N System Shutdown

    Liebert NXL UPS Operation and Maintenance Manual 250-300-400-800kVA Figure 45 Starting 1+N System Shutdown If press“1+N UPS” button and press Ok then shutdown all of the UPS modules and parallel system transfer to bypass, as shown in next figure. Figure 46 1+N System Shutdown confirm Page 55...

  • Page 56: The Steps Of Operation Of Maintenance Bypass

    Liebert NXL UPS Operation and Maintenance Manual 250-300-400-800kVA If press “1 N System” button and press Ok then shutdown all of the UPS and load drop occur as shown in next figure. Figure 47 1+N System Shutdown 2.7.8 The steps of operation of maintenance bypass The maintenance bypass procedure transfers the load supply from being protected by the UPS into AC input bypass supply through a maintenance bypass breaker.

  • Page 57: Maintenance

    Liebert NXL UPS Operation and Maintenance Manual 250-300-400-800kVA 3 MAINTENANCE 3.1 Safety Precautions Observe the safety precautions inside the UPS front cover. NOTE Service and maintenance work must be performed only by properly trained and qualified personnel and in accordance with applicable regulations as well as with manufacturers’...

  • Page 58: Liebert Services

    Liebert NXL UPS Operation and Maintenance Manual 250-300-400-800kVA 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 Start-up UPS Start-up — Liebert’s Customer Engineers perform a thorough non-powered inspection of the units and will then conduct a complete electrical checkout.

  • Page 59: Routine Maintenance

    Liebert NXL UPS Operation and Maintenance Manual 250-300-400-800kVA 3.3 Routine Maintenance You should become thoroughly familiar with the equipment, but at no time should you go beyond the specific procedures in this manual while performing maintenance or correcting a malfunction. If you have any doubt as to what must be done, call Liebert Services for further instructions at the address shown in the beginning of this manual.

  • Page 60: Limited Life Components

    Liebert NXL UPS Operation and Maintenance Manual 250-300-400-800kVA 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.

  • Page 61: Battery Maintenance

    Liebert NXL UPS Operation and Maintenance Manual 250-300-400-800kVA 3.4 Battery Maintenance WARNING Risk of electrical shock and high short circuit current. Can cause equipment damage, personal injury and death. These maintenance procedures will expose hazardous live parts. Refer servicing to properly trained and qualified personnel working in accordance with applicable regulations as well as with manufacturers’...
  • Page 62 Liebert NXL UPS Operation and Maintenance Manual 250-300-400-800kVA • After replacing battery jars in a battery cabinet, replace the retaining straps that hold the jars in place on the shelves. This will limit accidental movement of the jars and connectors should the cabinet ever need to be repositioned or relocated.

  • Page 63: Batteries

    Liebert NXL UPS Operation and Maintenance Manual 250-300-400-800kVA 3.4.2 Batteries Although the individual battery cells are sealed (valve-regulated) and require only minimal maintenance, the rack mounted batteries should be given a periodic inspection and electrical check. Checks should be performed at least annually to ensure years of trouble- free service.

  • Page 64: Detecting Trouble

    Liebert NXL UPS Operation and Maintenance Manual 250-300-400-800kVA 3.5 Detecting Trouble It is important that the operator check the instrument readings if abnormal equipment performance is suspected. Any metered value that differs appreciably from normal could mean an impending malfunction and should be investigated. Items to check include: •...

  • Page 65: Specifications

    Liebert NXL UPS Operation and Maintenance Manual 250-300-400-800kVA 4 SPECIFICATIONS 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. The float charge voltage for a battery is equal to the number of cells in series making up the battery multiplied by the charge voltage for each cell.

  • Page 66: Table 4: Electrical Specifications (250-300-400Kva Ups)

    Liebert NXL UPS Operation and Maintenance Manual 250-300-400-800kVA Liebert NXL Model Size Units Input Parameters Input Voltage to Rectifier 380/ 400 default/ 415 - 3-phase, 3-wire plus ground Input Voltage to Bypass 380/ 400 default/ 415 3-phase, 4-wire +/-10% (*) -15% to -20% Input Voltage Range (Vac) (**) -20% to -30% (***) <-30%...
  • Page 67 Liebert NXL UPS Operation and Maintenance Manual 250-300-400-800kVA Liebert NXL Model Size Units System Parameters UPS Efficiency AC-AC 100% ≥ 93.5 (depends on rating & operating conditions) Load (w/o any power option) UPS Efficiency AC-AC 40÷80% ≥ 92.5 (depends on rating & operating conditions) Load (w/o any power option) Physical Parameters&Standards Width 6 Pulse...

  • Page 68: Table 5: Specifications (800Kva Ups)

    Liebert NXL UPS Operation and Maintenance Manual 250-300-400-800kVA Liebert NXL UPS SPECIFICATIONS Model Name Liebert NXL Nominal Power Rating at 0.9 PF Load Input Parameters 380V 400V 415V 380 / 400 / 415 (400V : default) 3-phase, 3-wires plus ground Input Voltage to Rectifier 1393 Rated Input Current (12P rectifier) @400V...
  • Page 69 Liebert NXL UPS Operation and Maintenance Manual 250-300-400-800kVA Liebert NXL UPS SPECIFICATIONS Model Name Liebert NXL Nominal Power Rating at 0.9 PF Load System Parameter UPS Efficiency AC-AC ≥ 93.5% (depends on rating & operating conditions) (without any power option) 100% Load UPS Efficiency AC-AC ≥...

  • Page 70: Appendix A-Ups Alarm And Status Messages

    Liebert NXL UPS Operation and Maintenance Manual 250-300-400-800kVA 5 APPENDIX A-UPS ALARM AND STATUS MESSAGES Table 6 shows alarm and status messages as they appear in Liebert NXL’s touch-screen and in the history log, along with a description and recommended actions, if any. If the recommended action fails to correct the condition, contact your factory-authorized service provider.
  • Page 71 Liebert NXL UPS Operation and Maintenance Manual 250-300-400-800kVA Event Message Event Definition Recommended Action Batt Discharging The UPS is on battery. Press “SILENCE” to silence the audible The most common reason for going to alarm. battery is a loss of rectifier input power Observe the One-Line Display.
  • Page 72 Liebert NXL UPS Operation and Maintenance Manual 250-300-400-800kVA Event Message Event Definition Recommended Action Batt Ovtemp One or more of the Battery Temperature Press “SILENCE” to silence the audible Limit Sensors is reporting a temperature alarm. above the limit setpoint. There are two Observe the One-Line Display.
  • Page 73 Liebert NXL UPS Operation and Maintenance Manual 250-300-400-800kVA Event Message Event Definition Recommended Action Batt Self Test The UPS is performing a battery self During normal operation, no user test. response is required. The battery self test terminates The battery test can be terminated at any automatically at the end of the test.
  • Page 74 Liebert NXL UPS Operation and Maintenance Manual 250-300-400-800kVA Event Message Event Definition Recommended Action Batt Test Inhibit The conditions required to perform an Check the Active Event Window and automatic battery test are not met. investigate other events to further When the battery test is inhibited, the analyze.
  • Page 75 Liebert NXL UPS Operation and Maintenance Manual 250-300-400-800kVA Event Message Event Definition Recommended Action BPSS Unable A problem has been detected in the Press “SILENCE” to silence the audible Bypass Static Switch. alarm. Press “RESET” to attempt to clear the fault.
  • Page 76 Liebert NXL UPS Operation and Maintenance Manual 250-300-400-800kVA Event Message Event Definition Recommended Action Bypass Breaker The bypass isolator has failed to (Q3) Close Fail respond to a close signal. Bypass Breaker The bypass isolator has failed to (Q3) Open Fail respond to an open signal.
  • Page 77 Liebert NXL UPS Operation and Maintenance Manual 250-300-400-800kVA Event Message Event Definition Recommended Action Controls The Controls Communication Failure If the alarm does not clear, or if the alarm Comm Fail event indicates a loss of communications condition returns, contact your factory- between the Controls and Human authorized service provider.
  • Page 78 Liebert NXL UPS Operation and Maintenance Manual 250-300-400-800kVA Event Message Event Definition Recommended Action EPO Shutdown The UPS shuts down in response to an Press “SILENCE” to silence the audible active Emergency Power Off (EPO) alarm. command. The EPO signal means the Resolve the issue that precipitated the front panel EPO button was pressed.
  • Page 79 Liebert NXL UPS Operation and Maintenance Manual 250-300-400-800kVA Event Message Event Definition Recommended Action Equip Ovtemp This summary event occurs when one or Press “SILENCE” to silence the audible Limit more internal temperatures have alarm. exceeded the maximum temperature Check the One-Line Display for system setpoint.
  • Page 80 Liebert NXL UPS Operation and Maintenance Manual 250-300-400-800kVA Event Message Event Definition Recommended Action Excess Auto The UPS has re-transferred too many Press “SILENCE” to silence the audible Rexfers times and is now locked on bypass. alarm. The UPS attempts to perform an Press “RESET”...
  • Page 81 Liebert NXL UPS Operation and Maintenance Manual 250-300-400-800kVA Event Message Event Definition Recommended Action Inlet Ovtemp The air flowing into the UPS is too Press “SILENCE” to silence the audible warm. alarm. This alarm is self-clearing. When the Check the Inlet Air Temperature on the condition is no longer present, the alarm One-Line Display and verify the reading and any control activity tied to the...
  • Page 82 Liebert NXL UPS Operation and Maintenance Manual 250-300-400-800kVA Event Message Event Definition Recommended Action Fuse Fail This is a summary event that indicates Press “SILENCE” to silence the audible a fuse has opened. There are several alarm. fuses that can cause this fault. Check the One-Line Display and other The Fuse Failure event is caused by one indicators to determine the state of the...
  • Page 83 Liebert NXL UPS Operation and Maintenance Manual 250-300-400-800kVA Event Message Event Definition Recommended Action Input Contact Input Contact Interface #1 (or #2) has Interface #1 (or failed to communicate in a timely fashion. Communication Failure Input Current The detected input currents are not Press “SILENCE”...
  • Page 84 Liebert NXL UPS Operation and Maintenance Manual 250-300-400-800kVA Event Message Event Definition Recommended Action Input Not Avail This summary alarm means there is a Press “SILENCE” to silence the audible problem with input power. It is not alarm. acceptable to the Rectifier. Examine the One-Line Display.
  • Page 85 Liebert NXL UPS Operation and Maintenance Manual 250-300-400-800kVA Event Message Event Definition Recommended Action Inverter Fault This summary event indicates a Press “SILENCE” to silence the audible potentially serious problem in the alarm. Inverter. Check the One-Line Display to determine The controls react to an Inverter fault in the state of the UPS.
  • Page 86 Liebert NXL UPS Operation and Maintenance Manual 250-300-400-800kVA Event Message Event Definition Recommended Action Leading Pwr With a load of 80% or greater, the Press “SILENCE” to silence the audible Factor controls have calculated the output alarm. Power Factor to be less than .95 leading. Check the Output Meter readings and Leading Power Factors result in wasted verify the Output Power Factor.
  • Page 87 Liebert NXL UPS Operation and Maintenance Manual 250-300-400-800kVA Event Message Event Definition Recommended Action Low Power The output power factor is low. Press “SILENCE” to silence the audible Factor The output power factor is less than alarm. 70% leading or lagging. A simplified Evaluate the load on the UPS.
  • Page 88 Liebert NXL UPS Operation and Maintenance Manual 250-300-400-800kVA Event Message Event Definition Recommended Action Maintenance The external maintenance bypass Bypass breaker indicates that it is in the open Breaker(MBB) position. Open Man Rexfer This summary event means the The condition clears from the Active Inhibit conditions required to perform a manual Event Window when manual re-transfers...
  • Page 89 Liebert NXL UPS Operation and Maintenance Manual 250-300-400-800kVA Event Message Event Definition Recommended Action Multiple Fan Fail This summary event is active when Press “SILENCE” to silence the audible more than one fan has failed. alarm. Press “RESET” to clear the alarm. If the alarm will not clear, contact your factory-authorized service provider.
  • Page 90 Liebert NXL UPS Operation and Maintenance Manual 250-300-400-800kVA Event Message Event Definition Recommended Action Output Fault This summary event occurs when the Press “SILENCE” to silence the audible detected system output exceeds alarm. acceptable limits in either voltage or Check the Active Event Window and frequency.
  • Page 91 Liebert NXL UPS Operation and Maintenance Manual 250-300-400-800kVA Event Message Event Definition Recommended Action Redundant Fan This alarm indicates a fan has failed Press “SILENCE” to silence the audible Fail alarm. Contact your factory-authorized service provider. Regen Active Regeneration Mode is a service mode Under normal circumstances, none.
  • Page 92 Liebert NXL UPS Operation and Maintenance Manual 250-300-400-800kVA Event Message Event Definition Recommended Action Regen Regeneration Mode is a service mode Under normal circumstances, none. If Terminated that is normally controlled by the this message is active, and there is no service technician.
  • Page 93 Liebert NXL UPS Operation and Maintenance Manual 250-300-400-800kVA Event Message Event Definition Recommended Action REPO Shutdown The UPS shuts down in response to an Press “SILENCE” to silence the audible active Remote Emergency Power Off alarm. (REPO) command. Resolve the issue that precipitated the REPO.
  • Page 94 Liebert NXL UPS Operation and Maintenance Manual 250-300-400-800kVA NOTES: ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ Page 94...
  • Page 95 Page 95...
  • Page 96 Racks & Integrated Cabinets Connectivity Embedded Power Power Switching & Controls Services DC Power Monitoring Precision Cooling Surge Protection Business-Critical Continuity, Emerson Network Power and the Emerson Network Power logo are trademarks and service marks of Emerson Electric Co. ©2009 Emerson Electric Co.

Table of Contents