Instruction/ maintenance manual of the product NX Emerson
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AC P ow er For Business-Criti cal C on tinuity™ Li eb er t ® NX ™ Operati on and Maint enanc e Manual – 225-600kV A, Three-Phas e , Single-Module & Multi-Module.
C ONT ACTING E MERSON N ETWORK P OWER FOR S UPPORT 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.
i T ABLE OF CONTENTS I MPORT ANT S AFETY I NSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 SA VE THE SE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ii 2.6 Automatic Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 2.6.1 Overloads (Withou t Transfer) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
iii FIGURES Figure 1 Typical single module UPS system on e-line diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Figure 2 Main component locations-225 to 300kVA Lie bert NX . . . . . . . . . . . . . . . . . . . . . . .
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Important Safety Instructions 1L i e b e r t ® NX ™ I MPORT ANT S AFETY I NSTRUCTIONS SA VE THESE INSTRUCTIONS This manual co ntains important ins tructions that shoul d be followed during installation of your Liebert NX UPS.
Important Safety Instructions Liebert ® NX ™ 2 Battery Cabinet Precautions The following warning appl ies to all battery ca binets supplied with UPS systems. Addit ional warnings and cautions applicab le to battery cabinets may be found in Important Safety Instructions on page 1 and 4.
Introd uction 3L i e b e r t ® NX ™ 1.0 I NTRODUCTION 1.1 General Description The Liebert NX UPS provides continuous, high-quali ty AC power to your bu siness-critical equipment, such as telecommunications and data processing equipment.
Introd uction Liebert ® NX ™ 4 1.2 Modes of Operation 1.2.1 Normal Mode Operating in normal mode, the Liebert NX’s rectif ier derives power from a utility AC source and supplies regulated DC po wer to the inverter, which regenerates precise AC power to supply the connected equipment.
Introd uction 5L i e b e r t ® NX ™ 1.3 Options A number of options are availa ble from Emerson ® for your UPS system. Some options are not available for all ra tings. Described below are the mo st frequently provided options. Other optio ns are available.
Operation Liebert ® NX ™ 6 2.0 O PERATION The Liebert NX UPS is equipped with a microprocessor-b ased display touchscreen designed for convenient and reliable operat ion.
Operation 7L i e b e r t ® NX ™ Figure 3 Main component s, 400-600kV A Liebert NX FRONT DOORS REMOVED DOORS AND INNER SKINS REMOVED HMI Screen Main Input Circuit Breaker (CB1) Optional Backfeed Cir.
Operation Liebert ® NX ™ 8 Figure 4 M ain display screen, typ ical Figure 5 Normal Mode Figure 6 Utility fail 9 1 5 3 2 8 4 7 6 1. Byp ass Input: voltage and frequency readings 2. Line power Input: voltage, current and fre- quency read ings 3. Output: voltage, current and frequency read- ings 4.
Operation 9L i e b e r t ® NX ™ Figure 7 Load on byp ass 2.2 T ouchscreen Navigation Several menu items can be accessed fr om 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.
Operation Liebert ® NX ™ 10 2.2.2 St atus This menu item displays a li st of current Fault Warnings and Info. Figure 8 St a tus 2.2.3 Event s Log Menu This menu item displays the li st of Events that occurred recently while the U PS was in operatio n.
Operation 11 Liebert ® NX ™ Figure 9 Measures menus 2.2.5 Battery Menu This menu item displays the battery status/parameter s such as temperature, cell voltage, capacity and run time, as well as commands that enable th e user to the user to configure and execute the battery test.
Operation Liebert ® NX ™ 12 Battery Measures This section monitors variabl es applicable to the battery. Figure 10 Battery parameters.
Operation 13 Liebert ® NX ™ 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 certa in specific command s to be executed. This button is not active if the LIFE.
Operation Liebert ® NX ™ 14 2.2.7 Settings Menu This menu item displays the LCD settings and sel ected language. Figure 12 Settings Menu 2.3 Animated One Line Mimic This displays a ll the functional b locks in the UPS. Touch any icon to obtain detailed information about the corresponding fu nctional block.
Operation 15 Liebert ® NX ™ 2.4.1 Load on Byp ass In this operating mode, the connected loads are supplied from line power via the Static By pass Switch.
Operation Liebert ® NX ™ 16 2.4.2 Input Power Failure—Load on DC Source If the utility AC p ower source fails or is outsid e the acceptable range, th e DC source becomes the power source for the UPS module inverters. The UP S continues to supply po wer to the critical load and also to the UPS controls.
Operation 17 Liebert ® NX ™ 2.4.4 Remote Emergency Power Off The Remote Emergency Power Off control is a us er -provided switch located remotely from the UPS system.
Operation Liebert ® NX ™ 18 2.5.1 St artup—Single Module System This section lists typical step-by- step instructions. If the installation includ es a Maintenance Bypass, power may alread y be suppli ed to the critical load equipment through the Maintenance Bypass.
Operation 19 Liebert ® NX ™ g. Close all DC breakers. NOTICE Risk of improper operation. Can cause equipment damage. Do not close the battery breaker un til the DC bus is above 540VDC. h. Press the “Start Inverter” button on touchscre en. Press “Confirm” on the popup window and the load wil l be energize d from the UPS inverter.
Operation Liebert ® NX ™ 20 2.5.3 Load T ransfer and Retransfer-Single Module System Changing the load from the UPS system to the UP S bypass is called a transfer. Chang ing the load from UPS bypass to the UPS system is called a retransfer. Note that the UPS system control logic can initiate automatic load transfer s and retransfers.
Operation 21 Liebert ® NX ™ 2.5.5 Maintenance Byp ass Load T ransfers-Single Mo dule System: If Load is on Maintenance Byp ass 1. Verify that the module’s rectifier is On and in bypass mode. See 2.5.1 - Startup—Single Module System for the startup sequence.
Operation Liebert ® NX ™ 22 2.5.7 1+N System: T ransfer load from Byp ass to UPS 1. Verify that the module’s rectifier is On and in bypass mode. See 2.5.1 - Startup—Single Module System for the startup sequence. 2. For every module in the sy stem, close the B ypass Input Breaker (BIB) or verify that it is closed.
Operation 23 Liebert ® NX ™ 3. If using a key interlock system, a. The “OK to transfer” lamp on the key-release unit will light. b. De press the key-releas e unit push bu tton. c. Turn the key and remove it from the key-release unit. d. Insert the key into the lo ck for the Maintenance Byp ass Breaker (MBB) .
Operation Liebert ® NX ™ 24 2.6 Automatic Operations The Liebert NX UPS system is designed to functi on while unattended by an operator. The system control logic monitors the performance of the UPS, the availabili ty of power s ources and the current required by the critical load.
Operation 25 Liebert ® NX ™ 2.6.2 Automatic T ransfers to Byp ass (Overload Condition) The UPS system wi ll initiate an au tomatic load transfer to the bypass line if an overload conditi on exceeds the current-versus-ti me curve of overload capacity or if specified UPS system faults occur.
Operation Liebert ® NX ™ 26 2.6.4 Automatic Retransfers to UPS The following critical bus conditio ns must be present to ini tiate an automatic retra nsfer of the critical load from the bypass source to the UPS inverter: 1. Critical load was initially transfer red to the bypass source due to a sy stem overload only.
Options 27 Liebert ® NX ™ 3.0 O PTIONS 3.1 Remote Alarm Unit A remote alarm pa nel is availabl e for displaying important indiv idual UPS messages. The leng th of the connection cable must not exceed 1000f t.
Options Liebert ® NX ™ 28 3.3 Manage UPS Adapter ManageUPS NET Adapter III of fers an open approac h to network power manage ment by delive ring a complete set of manageabi lity options includ ing: WEB, Telne and Out-Of- Band accessibility, in addition to the full-featu red, embedded SNMP ag ent.
Options 29 Liebert ® NX ™ 3.4.1 A vailable Selectable In put Cont act s •O n G e n • Fast Power Of f • MBB Aux Contacts • Start battery test (see Note 4 below) • Fault acknowled ge • Bypass and Inverter both Off • Stop battery test (see Note 4 below) Notes 1.
Maintenance Liebert ® NX ™ 30 4.0 M AINTENANCE 4.1 Safety Precautions Observe the safety precautions in Battery Cabinet Precautions on page 2 . Observe all of th e warnings belo w before performing any maintenance on the UPS and associated equipment.
Maintenance 31 Liebert ® NX ™ 4.2 Liebert Services Startup, UPS maintenance, DC so urce maintenance and training pr ograms are available for the Liebert NX UPS through your Emerson ® sales representative.
Maintenance Liebert ® NX ™ 32 4.3 Routine Maintenance You should become thoroughly familiar with the equipment, but at no time should you go beyo nd the specific procedures in this manual wh ile performing mainten ance or correcting a malfunction.
Maintenance 33 Liebert ® NX ™ 4.3.3 Limited Life Component s The Liebert NX UPS has a design life well in exce ss 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 w herever practical and cost- effective.
Maintenance Liebert ® NX ™ 34 4.4.1 Battery Safety Precautions Servicing of batteries should be performed or supe rvised by personnel know ledgeable of batte ries and the required precautions. Keep unauthorized person nel away from batteries. When replacing batteries, use the sa me number and type of batteries.
Maintenance 35 Liebert ® NX ™ NOTICE Risk of improper cleaning. Can cause equipment damage. Batteries should be clea ned with a dry cloth or a cloth lightly moistene d with water. Do not use cleaners on the batteries. So lvents can make the battery cases brittle.
Maintenance Liebert ® NX ™ 36 Battery Cell Terminals : Check for discolo ration, corrosion and connectio n integrity. Clean and tighten if necessary. NOTE that when instal ling a new ba ttery, the initial torqu e value is 5 lb.- in. more than the retorque value.
Maintenance 37 Liebert ® NX ™ 4.5 Detecting T rouble It is important that the operator check the inst rument readings if abnormal equipment performance is suspected. Any metered valu e that differs ap preciably from no rmal could mean an impending malfunction an d should be in vestigated.
Specifications Liebert ® NX ™ 38 5.0 S PECIFICATIONS 5.1 DC Sources 5.1.1 Battery Operation The separate battery manufacturer ’s manual, availabl e on the manufacturer’s Web site, provides the necessary informati on for the insta llation, operatio n and maintenance of the battery.
Specifications 39 Liebert ® NX ™ T able 8 Electrical specificat ions Input Parameters Input Voltage to Rectifier, VAC, 3-phase, 3-wire 480V Input Voltage to Bypass, VAC, 3-phase, 3-wire 480V Input .
Specifications Liebert ® NX ™ 40.
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Ensuring The Hi gh Av ailabi lit y Of Mission-Critic al Data And Ap plic ations. Emerson Net work P ower , a business of Emer son (NYSE:EMR), is the global leader in enabling Business-Critic al Continuity ™ from grid to chip f or telecommunication networks, data centers, health care and industrial facilities.
An important point after buying a device Emerson NX (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Emerson NX yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Emerson NX - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Emerson NX you will learn all the available features of the product, as well as information on its operation. The information that you get Emerson NX will certainly help you make a decision on the purchase.
If you already are a holder of Emerson NX, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Emerson NX.
However, one of the most important roles played by the user manual is to help in solving problems with Emerson NX. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Emerson NX along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
