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Emerson NGA 2000 Computer Accessories User Manual

1. Bypass Busbars A B C Rectifier Input Busbars A B C Output 9 Busbars A B C Battery Eee Busbars E EI SH AAAA Input Ground Busbar DOORS AND INNER SKINS REMOVED Liebert NX Operation Figure4 Main display s
2. 14 2 4 Modes of Operation i ick e AeA GN DIA LAE PESCE WES He E EP LR 14 2 4 1 Eoad on Bypassis l4 dene T edu eerte eee a fd Ale ded e aed e eet ee ed 15 2 4 2 Input Power Failure Load on DC 16 2 439 COTE DC SOUTE c bte E edat br RE andere tt RE p et A Rer PUR RUE 16 2 4 4 Remote Emergency Power 17 2 5 Manual Operations All 17 2 5 1 Startup Single Module 18 2 5 2 Startups LEN System e suscepta tue ORE te te e bte Pe lege dr ter alie ait Grane Navas 19 2 5 8 Load Transfer and Retransfer Single Module 20 2 5 4 Maintenance Bypass Load Transfers Single Module System If Load is on UPS Bypass 20 2 5 5 Maintenance Bypass Load Transfers Single Module System If Load is on Maintenance Ya 21 2 5 6 1 N System Transfer load from UPS to 21 2 5 7 1 N System Transfer load from Bypass to 22 2 5 8 Shut Down Single Module UPS 22 2 5 9 IFN System Shutdown eroe Poe aa e ok BAe S ei eu 22 2 5 10 Load Transfer 1 N System Remove a UPS from System 23 2 5 11 Load Tr
3. Input current on each phase should be within 10 of the average input current Alarm messages indicate malfunction or impending malfunction A daily check of the Display Screen will help to provide an early detection of problems Tracing a problem to a particular section is facilitated by alarm messages and the metered parameter indications NOTICE Risk of recurring problem Can cause degraded performance and equipment damage If the UPS system has an open fuse the cause should be determined before replacing the fuse If the cause is not corrected it could recur Contact Liebert Services for assistance Reporting a Problem If a problem occurs within the UPS review all alarm messages along with other pertinent data Contact Liebert Services at 1 800 LIEBERT to report a problem or to request assistance Upstream Feeder Circuit Breaker Setting Inspections During normal UPS operations short term overload current demand from the bypass source may reach 10 times the UPS output current rating This overload current demand may be caused by the magnetizing inrush current of one or more downstream transformers i e power distribution units or faults on downstream branch circuits The instantaneous trip point s of the upstream bypass feeder breaker s must be set to support these temporary overloads The magnitude of short term overload bypass current demand is typically six to eight times the UPS current rating but must be determined b
4. 5 to 6 years Low Profile Fans gt 7 years 62 000 hours 5 to 6 years Air Filters 1 to 3 years Check four times per year Battery Lithium Logic Memory Backup 10 years 787 600 hours 8 to 9 years Battery Storage Lead Acid Wet Cell User Selection 20 Year Design Life 12 to 15 years 5 Year Design Life 2 to 3 years 10 Year Design Life 3 to 5 years Valve Regulated Lead Acid VRLA 8 to 12 years 20 Year Design Life Confirm need for replacement via load test or continuous battery performance monitoring A WARNING Risk of electric 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 the manufacturers specifications DC fuses operate at the rated battery voltage at all times A blown DC bus fuse indicates a serious problem Serious injury or damage to the equipment can result if the fuse is replaced without knowing why it failed Contact Liebert Services for assistance 33 Liebert NX Maintenance 4 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 b
5. MIB b Put the key back in the solenoid 6 If UPS bypass shutdown is required open the Bypass Input Breaker BIB This breaker is external to the UPS it may be in the Maintenance Bypass Cabinet Liebert NX 20 Operation 2 5 5 Maintenance Bypass Load Transfers Single Module System If Load is on Maintenance Bypass 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 Close the Bypass Input Breaker BIB or verify that it 1s closed This breaker is external to the UPS it may be in the Maintenance Bypass Cabinet 3 Close the UPS Backfeed Breaker BFB Refer to 2 5 1 Startup Single Module System 4 Ifusing a key interlock system a Depress the key release unit push button b Turn the key and remove it from the key release unit NOTE The UPS system is now locked in bypass and cannot be retransferred to the inverter until the key is returned c Insert the key into the lock for the Maintenance Isolation Breaker MIB d Retract the bolt Close the Maintenance Isolation Breaker MIB NOTICE Risk of improper operation sequence Can cause equipment damage Failure to close the Maintenance Isolation Breaker MIB will interrupt power to the load Open the Maintenance Bypass Breaker MBB Load is now on UPS Internal Bypass If using a key interlock system a Remove the key from the lock for the Maintenance Bypass Brea
6. Unpackaged approximate Ib kg 2 450 1 110 4450 Ib 2019kg Maximum Heat Dissipation Full Load BTU hr 41 000 45 000 54 000 72 000 90 000 108000 Color Black ZP 7021 Front Door Opening for serviceability More than 90 Degree of Protection for UPS Enclosure IP 20 with and without front door open Minimum Clearance Top In mm 24in 610mm Minimum Clearance Back In mm 0 Minimum Clearance Sides In mm 0 Location of Cable Entrance Top or Bottom UL 1778 4th Ed CSA 22 2 107 3 FCC Part 15 Class A IEC62040 2 Level 4 Criteria A EN61000 4 3 Level 3 Criteria A Standards amp Conformities EN61000 4 6 Level 4 Criteria A EN61000 2 2 Criteria A EN61000 4 4 Level 4 Criteria A ANSI C62 41 Category A3 amp B3 ISTA Procedure 1H WEEE 39 Liebert NX Specifications Liebert9NX 40 Ensuring The High Availability Of Mission Critical Data And Applications Emerson Network Power a business of Emerson NYSE EMR is the global leader in enabling Business Critical Continuity from grid to chip for telecommunication networks data centers health care and industrial facilities Emerson Network Power provides innovative solutions and expertise in areas including AC and DC power and precision cooling systems embedded computing and power integrated racks and enclosures power switching and controls infrastructure management and connectivity All solutions are supported globally by local Emerson Network
7. 2 1 2 1 1 2 2 1 2 3 1 2 4 Modes of Operation 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 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 Liebert NX 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 Inverter fails nverter overload capacity is exceeded Inverter is manually turned Off by the user NOTE Q If the inverter is asynchronous with the bypass the static switch will transfer the load from the inverter to the bypass WITH interruption in AC power to the critical load This interruption will be less than 10ms This interruption time may be altered by modifying the Output transfer interrupt time setting Battery Mode When utility AC power fails the Liebert NX protects the critical load by instantaneously channeling DC source power to the inverter which continues supporting the critical load without interruption When utility power returns and is within acceptable limits the Liebert NX automatically shifts back
8. 28 UPS component service life 33 Battery voltage nominal and float 35 Battery tetorque vales ccc eas Rev VR a RE EU hie eS Bea AE ae Roe 36 Environmental re 38 Physical specitications EP qua eae ta CEA UV A eS 39 El ct cal specifications eoo cepe EE ER EPA te 39 iii 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 A A A WARNING Risk of electric shock Can cause equipment damage injury or death This UPS has several circuits that are energized with high DC as well as AC voltages Check for voltage with both AC and DC voltmeters before working within the UPS Check for voltage with both AC and DC voltmeters before making contact Only properly trained and qualified personnel wearing appropriate safety headgear gloves shoes and glasses should be involved in installing the UPS or preparing the UPS for installation When performing maintenance with any part of the equipment under power service personnel and
9. 30 77 F 25 60 20 101 8249 9 137 5 10999 8 183 3 13749 8 229 2 16499 7 275 16499 7 275 105 1650 0 27 5 2200 0 36 7 2750 0 45 8 3299 9 55 3299 9 55 110 825 0 13 75 1100 0 18 3 1375 0 22 9 1650 0 27 5 1650 0 27 5 115 550 0 9 2 733 3 12 2 916 7 15 3 1100 0 18 3 1100 0 18 3 120 412 5 6 9 550 0 9 2 687 5 11 5 825 0 13 8 825 0 13 8 125 319 4 5 3 425 9 7 532 4 8 9 638 9 10 6 638 9 10 6 130 2222 8 7 296 3 4 9 370 3 6 2 444 4 74 444 4 74 135 152 7 2 5 203 6 3 4 254 6 4 2 305 5 5 305 5 5 140 100 6 1 7 134 2 2 2 167 7 2 8 201 3 3 4 201 3 3 4 145 36 7 48 9 61 1 1 0 73 3 1 2 73 3 1 2 150 27 7 37 0 46 2 55 4 55 4 155 7 3 9 7 12 1 14 6 14 6 160 7 3 9 7 12 1 14 5 14 5 165 7 3 9 7 12 1 14 5 14 5 The inverter overload is based on 104 40 ambient At lower ambient temperatures the overload timers automatically adjust to longer run times Liebert NX 24 Operation 2 6 2 2 6 3 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 The Overload Transfer and Output Undervolt
10. 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 Because the charging voltage level is critical to proper battery operation refer to your battery manual available on the manufacturer s Web site for information about your system For models with nominal 240 cell battery the DC bus nominal float voltage range is 2 15 to 2 30VPC Maximum equalize voltage is 2 45VPC Battery voltage at end of discharge is 1 65VPC at the UPS terminals The number of battery cells required ranges from 228 to 246 depending on the application 5 2 Other DC Sources The separate DC source manufacturer s manual available on the manufacturer s Web site provides the necessary information for the installation operation and maintenance of the DC source Use the DC source manual in conjunction with this manual 5 3 Environmental Conditions Table 7 Environmental specifications Parameter Specification Endosure The UPS is housed in a NEMA 1 enclosure The enclosure is designed for indoor use only and is not to be subjected to falling objects or precipitation Recommended Operating Temperature F C Max
11. This may takes several minutes c Optional Input Breaker CB1 installed Close CB1 NOTE The rectifier will start automatically once it is powered when either RFB or 1 closed d Close Bypass Backfeed Breaker BFB The equipment mimic screen will display and the Static switch will turn On and fans will be powered On e Theload will now be powered by the bypass f Onthe HMI verify that the Rectifier and Booster are Green Liebert NX 18 Operation g Close all DC breakers NOTICE Risk of improper operation Can cause equipment damage Do not close the battery breaker until the DC bus is above 540VDC h Press the Start Inverter button on touchscreen Press Confirm on the popup window and the load will be energized from the UPS inverter NOTICE Risk of equipment damage If an abnormal situation occurs during this startup procedure open the input circuit breaker and investigate the problem Call Liebert Services if help is required 2 5 2 Startup 1 N System This section lists typical step by step instructions 1 D Before applying power to each UPS module determine the position of the following circuit breakers and switches of each UPS module Optional Input Circuit Breaker CB1 Verify that this breaker on the front of the UPS cabinet see Figures 2 and 3 is in the open position Module Output Breaker MOB Verify that this external breaker is open or tripped Module Battery Di
12. UPS System Perform a Module Shutdown to remove power from a UPS module Read all warnings in 4 0 Maintenance before performing any maintenance on your Liebert NX UPS These warnings and cautions must be observed during any work on the UPS Use the module Monitor Mimic Display to determine the operating condition of the UPS module 1 Press the Stop Inverter button on the touchscreen This will put the load on bypass 2 Open all DC breakers Open the bypass and rectifier breakers to complete the shutdown 1 N System Shutdown This section lists typical step by step instructions Perform a System Shutdown Procedure when you want to remove power from the entire UPS system Read all warnings in 4 0 Maintenance before performing any maintenance on your Liebert NX UPS These warnings and cautions must be observed during any work on the UPS Use the module Monitor Mimic Display to determine the operating condition of the UPS module 1 On each module press the Stop Inverter button on the touchscreen NOTE The inverters will stay online until the Stop inverter button is pressed on the last module 2 This will transfer the UPS system to bypass Liebert NX 22 Operation 2 5 10 2 5 11 If using a key interlock system a The OK to transfer lamp on the key release unit will light b Depress the key release unit push button c Turn the key and remove it from the key release unit d Insert the key in
13. an automatic transfer to bypass is initiated and the bypass line is available If the OK to Transfer condition is present the load transfer will be uninterrupted If the Static Switch Unable alarm message is present for any reason the automatic transfer will be interrupted for 40 to 120 milliseconds Because of the reliability of the UPS components an interrupted load transfer is a very unlikely occurrence Some installations may include a Remote Emergency Power Off mode that can be initiated automatically by a contact closure in the critical load equipment Refer to 2 4 4 Remote Emergency Power Off 25 Liebert NX Operation 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 1 Critical load was initially transferred to the bypass source due to a system overload only A manual retransfer from bypass is required if the transfer to bypass was caused by any condition other than output overload Overload has since dropped below 95 of the rated load Both the Input and the DC source MBD circuit breakers have remained closed since the overload transfer OK to Transfer signal received from the control logic for at least 10 seconds within 5 minutes of the system overload transfer A manual retransfer from bypass is required for overloads lasting 5 minutes or more Cyclic type overloads w
14. booster charger batteries inverter and load Table 1 Measurements for functional blocks Rectifier Bypass Inverter Chg Boost Battery Load Voltage L L Voltage L L Temperatures Booster Battery Voltage per phase utput Voltage Current Phase Frequency Qutput Battery Current Voltage oltage Setting Frequency Temperatures Charger Current Limit Temperatures Current kVA Battery Voltage Backup Time kW Temperatures Battery Current Capacity kVA our JM Temperatures Frequency Overload Time Remaining Load Total Load Power kW Total Load Power kVA Ambient Temperature Liebert NX 10 Operation Figure9 Measures menus Bypass Inverter Chg Boost Battery Load Rectifier Input Voltage A B 468 2V B C 4734V C A 4725V Rectifier Input Current 49A B 49A 6 5 Rectifier Input Frequency 59 9 Hz InputApparent Power A 1 3 KVA B 1 3 KVA c 1 7 KVA Module 1 Temp Sensor 1 27 80 6 F B 26 C 78 8 F 26 78 8 F Module 1 Temp Sensor2 A 26 0 788 F B 27 80 6 F c 26 C 78 8 F v 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 Bat
15. conditions before or at the time of the shutdown Some or all of the alarm conditions may have been resolved To clear these alarm messages turn Off control power see Figures 2 and 3 Wait at least 10 minutes for the control power circuitry to completely de energize After 10 minutes turn control power back On A WARNING Risk of electric shock and high short circuit current Can cause equipment damage personal injury and death If the UPS has been shut down for maintenance verify that all of the UPS system doors are closed and latched All test equipment must be removed from the system All electrical connections must be secure 1 Before applying power to the UPS module determine the position of the following circuit breakers and switches Optional Input Circuit Breaker CB1 Verify that this breaker on the front of the UPS cabinet see Figures 2 and 8 is in the open position Module Battery Disconnect MBD Verify that this external breaker is open or tripped If DC source cabinets are used verify that breakers on all the cabinets are open Bypass Circuit Breaker BFB This circuit breaker see Figures 2 and 3 should be open NOTE If power to the critical load is already supplied through this breaker keep this breaker closed 2 Start the module a Close the Rectifier Feed Breaker RFB This breaker is external to the UPS it may be in the Maintenance Bypass Cabinet b Wait until the HMI finishes booting up
16. ds ds iesus s eee usto teen 32 43 2 uius talc ue ahah ooo ER home UE a austen atl da ait eta 32 4 9 8 Limited Life Components 0 00 AEE cc eee eee eee as 33 Battery Maintenances ers o D beu a ee Sa Ene Edu cg CARE Eau ea 33 4 4 1 Battery Safety Precautions riiui heee eee es 84 Deteetmpe PLrouble 2 dace PERROS veau Eier AROS GUE ee aes 37 4 5 1 Items to check eee E nee ence eens 37 Reporting a Problem ues eve er nd Cee be Re Mads kes 37 Upstream Feeder Circuit Breaker Setting 37 SPECIFICATIONS vus VA Rex ee ee dox ne ied ee Ste cae RISO RE ee wd 38 WG SOR BS T cue du atender a UAE Ro alee CIR e ORO RI RUE 38 bud Battery Operations ioi teet orbes sce de a TRUSTe Re uA 38 Other DEC SON FGBBS acces inr Pub ERR a oo top EE TAE o es Su pd avg 38 Environmental 88 ees eho 38 Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9 Figure 10 Figure 11 Figure 12 Figure 13 Figure 14 Figure 15 Figure 16 Figure 17 Figure 18 Table 1 Table 2 Table 3 Table 4 Table 5 Table 6 Table 7 Table 8 Table 9 FIGURES Typical single module UPS system one line 3 Main component loc
17. final positive and negative terminal lugs Compare these values with those shown below The recorded nominal voltage should be no less than the value shown while the recorded float voltage should be within the range shown If a discrepancy is found contact Liebert Services Table 5 Battery voltage nominal and float Battery Voltage VDC Number of Cells Nominal Float 240 480 527 552 Power Connections Check for corrosion and connection integrity Inspect wiring for discolored or cracked insulation Clean and or retighten as required Refer to torque specifications in Table 7 35 Liebert NX Maintenance Battery Cell Terminals Check for discoloration corrosion and connection integrity Clean and tighten if necessary NOTE that when installing a new battery the initial torque value is 5 lb in more than the retorque value Table 7 shows battery retorque values Table 6 Battery retorque values Retorque Value Battery Mfr Battery Model in Ib N m UPS12 300MR 110 12 4 UPS12 350MR 110 12 4 C amp D UPS12 400MR 110 12 4 UPS12 490MRLP 110 12 4 UPS12 540MR 110 12 4 HX205 FR 65 7 3 HX300 FR 65 7 3 HX330 FR 65 7 3 HX400 FR 65 7 3 Enersys HX500 FR 65 7 3 HX540 FR 65 7 3 16HX800F 100 11 3 16HX925F 100 11 3 24HR3000 65 7 3 27HR3500 65 7 3 East Penn 31HR4000 65 7 3 31HR5000 65 7 3 If the system uses a diff
18. is full and cannot store any more data this button is pressed the UPS is forced manually to ake an immediate call to the LIFE station Buffer full call Manual call request button Shows whether the LIFE net option is Shows whether the LIFE net option has Displays the time used by the UPS to Waiting for connection Connected LIFE net data sending in progress stage 1 LIFE net data sending in progress stage 2 Ups Online Session in progress Closing connection Call delayed Routine Call Emergency call Manual Call Buffer full call 2 UPS calls status e net scheduled dd mm yy hh mm ss Displays the time of next regular UPS call Emergency calls Enabled Disabled Shows whether UPS emergency calls enabled or have been inhibited by the Life Station for a particular reason dd mmyy hh mm ss Displays the seconds countdown after which the UPS will repeat a previously unsuccessful Life communication When this button is pressed the delayed call countdown is forced to zero so that the UPS repeats the call immediately Delayed call in Reset delayed Reset delayed call call button 3 UPS connection status Not connected Wating for connection UPS is not connected to the LIFE Station The UPS has requested connection to the Life Station and is aiting for connection to be established Connected e UPS is connected to the LIFE Station LiFE net data sending In The UPS is transmitting
19. its diagnostics history to the LIFE progress stage 1 UFE net data sending In The UPS is exchanging other service data with the LIFE progress stage 2 Station UPS online session UPS has entered the online session requested by the LIFE progress Station Administrator so it can be monitored in real time Closing connection Call delayed UPS is closing the connection The UPS has scheduled a new call because the previous call ailed 13 Liebert NX Operation 2 2 7 Settings Menu This menu item displays the LCD settings and selected language Figure 12 Settings Menu 28 English Apply com El 1 Scrocn Savor After 04 00 min E f Never 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 providing detailed information will be displayed 2 3 4 Rectifier Functional Block This page displays detailed information about the current status each of the following function blocks of the Rectifier Rectifier Bypass nverter Booster Charger Battery Load 2 3 2 About Menu This button displays the Type and Size of the unit When t
20. test equipment should be standing on rubber mats In case of fire involving electrical equipment use only carbon dioxide fire extinguishers or those approved for use in fighting electrical fires Extreme caution is required when performing installation and maintenance Special safety precautions are required for procedures involving handling operation and maintenance of the UPS system Observe all safety precautions in the installation manual SL 25535 and in this manual before as well as during performance of all maintenance procedures Observe all DC safety precautions before working on or near the DC system WARNING Risk of heavy unit falling over Improper handling can cause equipment damage injury or death Exercise extreme care when handling UPS cabinets to avoid equipment damage or injury to personnel The UPS module weight is up to 4450lb 2019kg Locate center of gravity symbols 4 and determine unit weight before handling each cabinet Test lift and balance the cabinets before transporting Maintain minimum tilt from vertical at all times Slots at the base of the module cabinets are intended for forklift use Base slots will support the unit only if the forks are completely beneath the unit Read all of the following instructions before attempting to move lift or remove packaging from unit or prepare unit for installation WARNING Risk of electric shock and fire Can cause equipment damage personal injury or death U
21. the UPS 5 For operation at higher elevations consult your Emerson sales representative or call Liebert Services at 1 800 LIEBERT Liebert NX 38 Specifications Table 8 Electrical specifications Input Parameters Input Voltage to Rectifier VAC 3 phase 3 wire 480V Input Voltage to Bypass VAC 3 phase 3 wire 480V Input Voltage Range VAC 10 to 30 Input Frequency Hz 60 Permissible Input Frequency Range Hz 55 65 Rectifier Power Walk In sec 1 90 selectable in 1 Sec Increments DC Parameters Battery Type VRLA Valve Regulated Lead Acid or FLA Flooded Lead Acid DC Bus Range VDC 396 600 2 27 DC Float Voltage VPC End Cell Voltage VPC 1 65 for VRLA FLA DC Ripple Voltage in Float and Const V Ch mode lt 1 RMS Value lt 3 4 Vpp Output Parameters Output Voltage 3 phase 3 wire 480V Output Voltage Regulation lt 1 3 Phase RMS Average Output Frequency Hz 60 Output Frequency Regulation t 0 1 Capacity to Handle Step Load 0 100 or 100 0 Voltage Displacement el 120 x1 el With Unbalanced Load Compliance to FCC Class A Standard Table 9 Physical specifications Liebert NX Model Size 225 250 300 400 500 600 Physical Parameters and Standards in mm Width 53 4 90 7 Depth 33 7 Height 78 6 Weight
22. the following information Bypass Input Voltage Bypass Input Frequency Input Voltage Input Current Input Frequency Output Voltage Output Current Output Frequency DC Source Voltage DC Source Current System Status System Normal Indicator When the green status box appears this means that the system is operating normally and that no warning or alarm has occurred During line power failures with all other conditions being nominal this box 1s replaced by a yellow triangle Warning Indicator This indication is activated by the presence of abnormal conditions which could affect the normal operation of the UPS These conditions do not originate with the UPS but may be caused either by the surrounding environment or by the electrical installation line power side and load side A description of the active warning s can be viewed by clicking on the yellow triangle or using the Status button at the bottom of the page Fault Indicator When the red circle with white cross appears immediate attention should be given to the severity of the alarm and service should be called promptly A description of the active alarm s can be viewed by clicking on the Status button at the bottom of the page Regardless of which indicator is active all available diagnostic information on the unit can be displayed by touching this area Control Buttons Start Inverter and Stop Inverter The touchscreen display features two buttons f
23. to Normal mode with the rectifier powering the critical load Maintenance Bypass The installation of a Maintenance Bypass Cabinet or Assembly is recommended to allow you to totally isolate the UPS from all power sources Use of the Maintenance Bypass is described in 2 0 Operation Liebert NX 4 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 and the load requirements of your application Battery Cabinets Valve regulated lead acid VRLA sealed batteries are available in matching cabinets for convenient installation and maintenance in otherwise unprotected space Depending on the UPS module rating two or more cabinets may be connected in parallel to provide the additional run time Module Battery Disconnect The UPS system utilizes a separate Module Battery Disconnect for remotely located batteries sensing circuit in the UPS module set at the battery low voltage limit trips the Module Battery Disconnect to safeguard the battery from excessive discharge The Module Battery Di
24. unexpected power loss Can cause equipment damage When the critical load is being supplied power from the bypass line the load is vulnerable to utility failure and fluctuations Figure 13 Load on bypass 5 0 5 oes os Module Bypass AC Input Critical Load Module Bypass UPS Module AC Input UPS Output Critical Load To DC Supply Figure 15 Load on UPS bypass available Module Bypass UPS Module AC Input 3 Q BFB Module Rectifier AC Input UPS out put Critical Load To DC Supply 15 Liebert NX Operation 2 4 2 Input Power Failure Load on DC Source If the utility AC power source fails or is outside the acceptable range the DC source 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 Time screen at the UPS modules to monitor the present DC source voltage compared to the shutdown value The time the DC source can sustain the load depends on the size of the load and the size and condition of the DC source The battery block in the UPS module Monitor Mimic Display indicates Charge or Discharge and the current in amperes Figure 16 Input power fail load on DC source Module Bypass UPS Module AC Input Module Rectifier
25. visits per year for the UPS The first can be conducted with the UPS operational and includes an infrared scan of key UPS components The annual visit will require taking the UPS off line for a thorough non powered inspection These visits are in addition to the general housekeeping tasks such as changing air filters that can be performed by user personnel Battery Service Agreements The same flexible Signature Program can also be applied to contracts for battery maintenance Again the coverage needed will depend on the type of battery purchased and the degree of support required from Liebert Services Training User training courses include the proper operation of the system emergency procedures preventive maintenance and some corrective maintenance Warranties Contact Liebert Services if you have any questions regarding the warranty on your Liebert NX UPS or the batteries 31 Liebert NX Maintenance 4 3 4 3 1 4 3 2 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 at 1 800 LIEBERT for further instructions The UPS is designed for unattended operation but does require some common sense maintenance Keep good records Troubleshooting is easier if you have historical backgr
26. 60 seconds Liebert NX Maintenance 4 0 MAINTENANCE 41 Safety Precautions Observe the safety precautions in Battery Cabinet Precautions on page 2 Observe all of the warnings below before performing any maintenance on the UPS and associated equipment Also observe the manufacturer s safety precautions pertaining to the DC source along with the DC source safety precautions in this section 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 specifications WARNING Risk of electric shock and high short circuit current Can cause equipment damage personal injury and death Extreme caution is required when performing maintenance Be constantly aware that the UPS system contains high DC as well as AC voltages With input power Off and the DC source disconnected high voltage at filter capacitors and power circuits should be discharged within 5 minutes However if a power circuit failure has occurred you should assume that high voltage may still exist after shutdown Check with a voltmeter before making contact AC voltage will remain on the bypass and output circuit breakers and the static bypass switch unless associated external circuit breakers are opened Check for voltage with both AC and DC voltmeters prior to making contact When the UPS system is under power both the ope
27. AC Input Critical Load To DC Supply 243 Off DC Source The DC source can be disconnected from the UPS if required for 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 fails the UPS system cannot supply power to the load NOTICE Risk of unexpected power loss to the connected load Can cause equipment damage When the UPS is operating with the module battery disconnect MBD circuit breaker s open the critical load is not protected from loss of the utility source power Figure 17 Load on UPS DC source not available 0 5 9 A 5 5 oe Module Bypass UPS Module AC Input Module Rectifier z i AC Input SA urs output Critical Bus j Load ea oa Ge eee Shoe oS Oe Liebert NX 16 Operation 2 4 4 Remote Emergency Power Off The Remote Emergency Power Off control is a user provided switch located remotely from the UPS system It usually is installed in the same room as the critical load equipment This mode can also be initiated by an automatic contact closure in the same external circuit as the manually operated switch When the Remote Emergency Power Off switch is operated the UPS will shut down and open bypas
28. AC Power For Business Critical Continuity Liebert NX Operation and Maintenance Manual 225 600kVA Three Phase Single Module amp Multi Module 4 gt EMERSON Network Power 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 distributor is responsible for providing qualified factory authorized service For Liebert Services to assist you promptly please have the following information available Part numbers Serial numbers Rating Date purchased Date installed Location Input voltage frequency Output voltage frequency DC source reserve time Product Warranty Registration To register for warranty protection visit the Service and Support section of our Web site at www liebert com Click on Product Registration and fill out the form TABLE OF CONTENTS IMPORTANT SAFETY INSTRUCTIONS lese hh hinh nnns 1 SAVE THESE INSTRUCTIONS 1 1 0 INTRODUCTION vae DID T E uA E T
29. E The following procedure assumes that the UPS installation inspection and initial startup have been performed by Emerson Network Power Liebert Services An Emerson authorized representative must perform the initial system startup to ensure proper system operation 17 Liebert NX Operation 2 5 1 Startup Single Module System This section lists typical step by step instructions A WARNING Risk of electric shock Can cause equipment damage personal injury and death The following procedure provides power to the critical load distribution system Verify that the critical load distribution 1s ready to accept power Make sure that personnel and equipment are ready for the critical load distribution system to be energized If the installation includes a Maintenance Bypass power may already be supplied to the critical 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 During startup 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 NOTE Q If the system was shut down in response to an Emergency Off there may be alarm messages on the touchscreen that describe system
30. Power service technicians Liebert AC power precision cooling and monitoring products and services from Emerson Network Power deliver Efficiency Without Compromise by helping customers optimize their data center infrastructure to reduce costs and deliver high availability While every precaution has been taken to ensure the accuracy and completeness of this literature Liebert Corporation assumes no responsibility and disclaims all liability for damages resulting from use of this information or for any errors or omissions 2012 Liebert Corporation All rights reserved throughout the world Specifications subject to change without notice Liebert is a registered trademark of Liebert Corporation All names referred to are trademarks or registered trademarks of their respective owners 1 25354 REV2 03 13 Emerson Network Power The global leader in enabling Business Critical Continuity Technical Support Service Web Site www liebert com Monitoring liebert monitoring emerson com 800 222 5877 Outside North America 00800 1155 4499 Single Phase UPS amp Server Cabinets liebert upstech emerson com 800 222 5877 Outside North America 00800 1155 4499 Three Phase UPS amp Power Systems 800 543 2378 Outside North America 614 841 6598 Environmental Systems 800 543 2778 Outside the United States 614 888 0246 Locations United States 1050 Dearborn Drive P O Box 29186 Columbus OH 43229 Europe Via Leonard
31. URKS SENSE QS 3 1 1 General veu iom em Lo Dee mapu PA eu ty QU hile rid Ae tls Oo ep ced 3 1 2 Modes of Operation oeaevisede x er CUNT SUR EA EUROPE NERA dr vU VY 4 1 2 L Normal Mode du nt Gilera eeu eos oa Med e RaW as Ale eat exe Guid ee 4 1 2 2 Bypass Mode s v Ed edite a AREE Eus odiosa esteem eh dien hing 4 1 2 3 Battery Mode ol EX RERO CUR ne Lo Rete a aed a en ge ee RI MS 4 12 4 Maintenance Bypass a eee el ex EC P IV UR p E Ee 4 1 3 Opti Onis iu Son ee PING MUS A Blt A Re a DER EMORY 5 2 0 OPERATION Saco ee See RE aren snail REC oa aa tare arse aed wis Re oe 6 2 1 Features 4 28428 as ebd E rue d sun Sat uito tl a hae du oret 6 2 2 Touchscreen Navigation ahh hes 9 2 2 41 Main Display Screen ee 9 10 2 98 Events Los Menu tots TR EAE Graeme c alge QA lea ent eI Ue Se AE TMs xs 10 2 2 4 Measur s Men suisse RE ae es HEA a a ee ee Ha ee ea 10 2 220 Battery Mein tbe a eee Ee choi tute e Bee OE OE ace Ec ON s era dE 11 2 26 Life Ment ia ene BESS SEA ERE EE SERE CREER SMS E NEP EHE ES 13 22 7 Settings Ment s cR eATS uERSN SEMEN Ne Me ME S RE EWEU PNE EE 14 2 3 Animated One Line 55 14 2 8 1 Rectifier Functional Block 0 0 rrr 14 29 2 About Grudn t erc o eset e ere etre caves acie RETRO nw REN eee Me Du
32. a complete electrical checkout The DC source installation is also inspected and placed on an initialization charge to ensure cell equalization Customer Operation training will be conducted during DC source charge time Load bank testing and full site acceptance testing are additional services that can be performed during a UPS startup One preventive maintenance service call can be added to the initial UPS startup agreement Battery Installation Startup When purchased with a UPS Startup this agreement provides consistent professional service for your entire UPS system This one source approach avoids conflicts that may occur during a multisource installation Note that Emerson requires an installation inspection for all batteries not installed by Emerson customer engineers Battery IEEE Certification Inspection The battery specialist will perform a detailed inspection of the entire battery system to ensure it meets current IEEE standards Maintenance Agreements The Signature Program UPS Service Agreements Liebert Services has a variety of available maintenance agreements depending on specific site needs Choose the level of support appropriate for each installation Mission critical sites can have the standard parts and labor around the clock coverage for their UPS with or without scheduled preventive maintenance visits Other sites can benefit from a variety of money saving options Emerson recommends two preventive maintenance
33. age alarm messages will initiate an automatic transfer to bypass Other UPS system faults will initiate an automatic transfer to bypass followed immediately by the shutdown and isolation of the UPS system Refer to 2 6 3 Automatic Transfers to Bypass UPS System Faults NOTE Q A load transfer to the bypass line will be completed whenever an automatic transfer to bypass is initiated If the OK to Transfer condition is present the load transfer will be uninterrupted If the Static Switch Unable alarm message is present for any reason the automatic transfer will be interrupted for 40 to 120 milliseconds Because of the reliability of the UPS components an interrupted load transfer is a very unlikely occurrence Automatic Transfers to Bypass UPS System Faults For specified UPS system faults the control logic will initiate an automatic transfer to bypass followed immediately by a shutdown and isolation of the UPS system The DC source MBD and input circuit breakers are open The bypass static switch will be closed if the bypass line is available NOTE The bypass line is usually not available during Low Battery Shutdown The following UPS system faults will initiate an automatic transfer to bypass DC Overvoltage Shutdown Inverter Fault Low Battery Shutdown Output Overvoltage and Undervoltage Overload Shutdown Equipment Overtemperature Rectifier Fuse Blown NOTE Q A load transfer to the bypass line will be completed whenever
34. ansfer 1 N System Add a UPS to the System Collective 23 2 6 3 0 3 1 3 2 3 3 3 4 4 0 4 1 4 2 4 3 4 4 4 5 4 6 4 7 5 0 5 1 5 2 5 3 Automatic Operations 24 2 6 1 Overloads Without 24 2 6 2 Automatic Transfers to Bypass Overload 25 2 6 8 Automatic Transfers to Bypass UPS System Faults 25 2 6 4 Automatic Retransfers to UPS ha 26 OPTIONS gt Oren aah Obes 27 Remote AlarmcUnit Jsa opta ee Reb A tales eee b REDEEM cab sedan Wt 27 MopUPS Shutdown and Monitoring Software 0 0 eee eee 27 Manage UPS Adapter ogg Wege s a E SIR oa ps 28 Onn eCtivaty z vi EP INO ORES hc FEE 28 3 4 1 Available Selectable Input Contacts 00 00 eee 29 3 4 8 Available Selectable Output Contacts csse 29 MAINTENANGE Cua h ge are a n aer iius muertos Gr beard ad aca c RAS or 30 Safety Precautions cce REIS meu VENE DEM eu aside a UR 30 Liebert ServIQOS uius dn ce Ro a C QU EO QUSE ae e eR ae oats ea Eod d 31 4 2 1 Professional Startup ies c s vi Pto e EXE IC Pe tee ode p V p 31 Routine Maintenancez Mr NY ae RE quce HUE AUR S Ros 32 Record Loria sees abso aR
35. ations 225 to 300kVA Liebert 6 Main components 400 600kVA Liebert 7 Maim display screen typieal ve e RP IARE RUE Bia Sales WS GigE Leu peus 8 Normal Nde oo Pow eee beheaded eto eub ebd ee eds 8 Utility fall 2 eed eho eb ide ere teet epe udi 8 Load onbypassz 4 e AN det deo e ete de dite C PR e SR o eto alin atii dup Ce deque ae don 9 10 Meas res menus 4 2 voee acm e DRE da oe detur Ee e aa eee aie Vea IS RU 11 Battery pararieters POI ee eO era de VE eres va e e eet 12 18 Settings Ment DOR Ne ro ape e a ese E RA TREAT EN 14 Toad on bypass Jueves te e ers as seconde a idu d 15 oad on bypass UPS available Rue Aes eta how esu 15 Load on UPS bypass available stes b a LEX ed ale SE 15 Input power fail load on DC 16 Load on UPS DC source not available 16 Remote Emergency Power Off 17 TABLES Measurements for functional blocks een nena 10 Current versus time curves of overload 24 Connectivity combinations sees s
36. atteries A WARNING Risk of electric shock explosive reaction hazardous chemicals and fire Can cause equipment damage personal injury and death Lead acid batteries contain hazardous materials Batteries must be handled transported and recycled or discarded in accordance with federal state and local regulations Because lead is a toxic substance lead acid batteries must be recycled rather than discarded Do not dispose of battery or batteries in a fire The battery may explode Do not open or mutilate the battery or batteries Released electrolyte is harmful to the skin and eyes It 1s toxic A WARNING Risk of electric shock and high short circuit current Can cause equipment damage personal injury and death The following precautions must be observed when working on batteries Remove watches rings and other metal objects Use tools with insulated handles Wear rubber gloves and boots Do not lay tools or metal parts on top of batteries Disconnect charging source prior to connecting or disconnecting battery terminals Determine whether the battery is grounded If it is grounded remove source of ground Contact with any part of a grounded battery can result in electrical shock The likelihood of such shock will be reduced if such grounds are removed during installation and maintenance A WARNING Risk of explosion and fire Can cause equipment damage injury and death Lead acid batteries present a r
37. brittle Because individual battery characteristics are not identical and may change over time the UPS module is equipped with circuitry to equalize battery cell voltages This circuit increases charging voltage to maintain flooded type battery cells at full capacity Because individual battery characteristics are not identical and may change over time the UPS module is equipped with circuitry to equalize battery cell voltages This circuit increases charging voltage to maintain flooded type battery cells at full capacity A WARNING Risk of electric shock explosive reaction hazardous chemicals and fire Can cause equipment damage personal injury and death Do not use equalize charging with valve regulated lead acid batteries Refer to the battery manufacturer s manual available on the manufacturer s Web site for specific information about equalize charging Matching Battery Cabinets Optional Although the individual battery cells are sealed valve regulated and require only minimal maintenance the Battery Cabinets should be given a periodic inspection and electrical check Checks should be performed at least annually to ensure years of trouble free service Voltage Records With the Battery Cabinet DC circuit breaker closed and the connected UPS operating measure and record battery float voltage With the DC circuit breaker open measure and record the nominal open circuit voltage Both these measurements should be made across the
38. creen typical EMERSON NETWORK POWER 9 Bypass Input UPS Output A B 468 2V A B 480 0 V 1 4739 V PhaseA 14 471 0V B C 3 sy Phase B 14A 59 9 Hz C A 480 0 V Phase C 0 0A 59 9 Hz UPS Module AB 468 2V PhaseA 49A B C 4729V Phase B 4 9A Voltage 544V C A 4725V 8 Phase C 65A 6 Current 01 4 Stat Stop Reset uj 599Hz Inverter Inverter w Fault e Cell Voltage 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 7T Menu Buttons ings 8 Animated One Line Mimic 9 About Button Figure5 Normal Mode Module Bypass UPS Module 1 Module Rectifier AC Input Critical Load To DC Supply Figure 6 Utility fail Module Bypass UPS Module AC Input Module Rectifier AC Input UPS Output Critical Load To DC Supply Liebert NX 8 Operation Figure7 Load on bypass 2 2 2 2 1 Module Bypass UPS Module Module Rectifier gt 1 O UPS Output Critical Load To DC Supply Touchscreen Navigation Several menu items can be accessed from the main display screen see Figure 9 These menu items are detailed in subsequent sections Main Display Screen This is the default screen It displays
39. e display touchscreen and system logic to function properly a Close the Bypass Input Breaker BIB This breaker is external to the UPS possibly in the Maintenance Bypass Cabinet The display touchscreen should startup b Close the Rectifier Feed Breaker RFB This breaker is external to the UPS possibly in the Maintenance Bypass Cabinet c Bypass Circuit Breaker BFB This circuit breaker should be open see Figures X and X for the location d Optional Module Output Breaker MOB This circuit breaker should be open This breaker is external to UPS possibly in the paralleling gear Apply power to the module If the equipment does not have CB1 installed the rectifiers of all modules will start automatically If is installed close CB1 for all modules and allow the rectifiers on all modules to start Verify the rectifier has started and that the LCD is fully functional before proceeding The Inverter and BPSS will be Off 3 Close the MOB breaker associated with this module a Inverter will automatically start when MOB is closed b Once the inverter has started and synchronized to the rest of system the module will add itself to the critical bus 23 Liebert NX Operation 2 6 Automatic Operations The Liebert NX UPS system is designed to function while unattended by an operator The system control logic monitors the performance o
40. erent model battery contact Liebert Services for the required torque value To access battery cell terminals disconnect the inter tier cable and two shelf retaining screws Once disconnected insulate with protective boot or electrical tape the cables to prevent accidental shorts The battery shelf can now be pulled out Tighten each terminal connection to the retorque value When replacing a battery the terminal connections must be cleaned and tightened Disconnect and insulate the cables connected to the battery Secure each battery shelf with retaining screws when maintenance is complete Other DC Sources If the UPS system uses a DC source other than a factory supplied Matching Battery Cabinet perform maintenance on the DC source as recommended in the DC source manufacturer s maintenance manual available on the manufacturer s Web site Liebert NX 36 Maintenance 4 5 4 5 1 4 6 4 7 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 If the UPS has not operated on battery power during the last 10 hours the batteries should require little charging current Battery mimic should indicate normal DC voltage with the battery charge current no more than 196 of maximum discharge current
41. ete set of manageability options including WEB Telne and Out Of Band accessibility in addition to the full featured embedded SNMP agent Event messages are also available as e mail and SNMP Traps a truly versatile tool for managing Liebert NX UPS systems in a network environment The software features DHCP Network Configuration Supports automatic IP settings configuration using the DHCP protocol The DHCP server must be located on a network that is accessible from the LAN that ManageUPS II is connected to Multiple Network Access Methods Site power and UPS status information can be accessed securely from any computer on your network View UPS system status in real time for situational decision support Access via Telnet SNMP or Web Browser SNMP Agent conforms to RFC1628 Standard UPS MIB Network Shutdown ManageUPS includes a UPS status server and a network shutdown controller Use these features with host shutdown software RCCMD MopUPS NSA MopUPS Professional or MopUPS P R to ensure safe shutdown of multiple servers workstations or PCs in TCP IP network environments Event and Data Logging ManageUPS II keeps a log file of UPS events and environment data On board log file viewer lets you filter records for easy analysis For details see http connectivity Emersonpower com Connectivity Table 3 gives details of the various combinations of connectivity solutions that can be used with the Liebert NX Only one of
42. f the UPS the availability of power sources and the current required by the critical load The system control logic Determines what overload conditions can be sustained without a transfer to bypass nitiates an automatic transfer to bypass to sustain an overload or when selected UPS faults occur Can initiate an automatic retransfer to the UPS after an overload has been cleared Initiates an automatic transfer to bypass and emergency module shutdown when specified UPS faults occur 2 6 1 Overloads Without Transfer The UPS system is capable of sustaining full output voltage 2 of the nominal voltage for overload conditions that remain within under the current versus time curve of overload capacity Figure 2 Note that the time scale 1s not linear For high current demands of short duration momentary overloads the critical load is supplied simultaneously by both the UPS system and the bypass line Whenever an overload condition occurs you should determine the cause of the overload If an overload condition exceeds the overload capacity the UPS system initiates an automatic load transfer to the bypass line For overloads above the Input Current Limit a DC source such as a battery system or a generation source must be available The Input Current limit has a default setting of 12596 rated output current Table 2 Current versus time curves of overload capacity Overload Time sec min Load 104 F 40 C 95 F 35 86 F
43. hich occur up to five select range is 0 to 5 times in 60 minutes are automatically returned to the inverter for each event including the Nth overload NOTE If you do not want the UPS system to initiate any automatic retransfers this can be set during the initial commissioning or by calling your local Liebert Services representative Liebert NX 26 Options 3 0 OPTIONS 3 1 Remote Alarm Unit A remote alarm panel is available for displaying important individual UPS messages The length of the connection cable must not exceed 1000ft 3 2 MopUPS Shutdown and Monitoring Software The MopUPS Professional software package provides safe system shutdown and power management With advanced features such as network shutdown scheduled shutdown and restart event messaging event logging data logging real time viewing UPS diagnostics and remote access MopUPS has everything necessary for preserving data and maximizing system uptime The software features 1 Remote management Site power and UPS status information can be accessed securely from any computer on your IP based network View event history and voltage logs for trend analysis View UPS system status in real time for situational decision support Access is based on User Authentication with 128 bit MD5 encryption 2 Remote messaging Keeps you informed anywhere fault and recovery messages are sent via SNMP Trap or e mail Body of e mail will include URL for quic
44. his area is touched you will obtain Serial Number FW details and IP and MAC addresses 2 4 Modes of Operation This section illustrates the flow of power through circuit breakers switches and UPS components during various modes of operation The same modes of operation apply to all configurations of the Liebert NX Highlighted thick lines in the diagrams indicate power flow and power availability These illustrations do not show an alternate power source generator and automatic transfer switch external to the UPS that might be present These illustrations do not show optional CB1 installed If 1 is installed it is assumed to be closed Liebert NX 14 Operation 2 4 4 Load on Bypass In this operating mode the connected loads are supplied from line power via the Static Bypass Switch The Static Bypass Switch is used to provide power to the loads If an overload or short circuit on UPS output occurs the Static Bypass Switch is automatically activated to provide uninterrupted power to the loads The Bypass operating condition is displayed From this operating mode the UPS automatically reverts to on line operation after the fault is corrected Bypass operation can also be specifically selected from the control panel using the push button Load on Bypass is shown in Figure 13 The UPS system could be in this mode of operation during either initial startup or UPS system shutdown or isolation for maintenance NOTICE Risk of
45. imum Operating Temperature F C 77 25 ambient 104 40 ambient design temperature without derating see Notes 2 and 3 Minimum Operating Temperature F C 32 0 Storage Temperature F C 13 to 158 25 to 70 Typical Battery Temperature Requirements Average annual temperature must not exceed 80 F 27 C Peak temperature must not exceed 109 F 43 C See battery manufacturer s recommendations Relative Humidity 0 to 95 without condensation Operating Elevation ft m Sea level to 3000 1000 without derating Storage Elevation ft m Sea level to 50 000 15 240 Audible Noise 5ft 1 5m from Unit 68 dBA typical Notes on Environmental Specifications 1 This category of electronic equipment is agency rated for use in an atmosphere free of conductive particles Some industrial facilities may require a room air filtration system to keep the UPS free of excess moisture and contaminants 2 The UPS system is designed to operate continuously at 104 F 40 C However design equipment life expectancy will be extended with lower temperatures 77 F 25 C is recommended 3 Ambient temperature is the maximum ambient temperature during any 24 hour period For operation at higher temperatures consult your Emerson sales representative or call Liebert Services at 1 800 LIEBERT 4 Exercise care during installation to ensure unimpeded airflow through
46. isk of fire because they generate hydrogen gas which is explosive In addition the electrical connections must be protected against short circuits and other sources of sparks The following procedures should be followed Do not smoke when near batteries Do not cause flame or spark in battery area Discharge static electricity from your body before touching batteries by first touching a grounded metal surface 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 need to be repositioned or relocated Regular maintenance of the battery module is an absolute necessity Periodic inspections of battery and terminal voltages specific gravity and connection resistance should be made Strictly follow the procedures outlined in the battery manufacturer s manual available on the manufacturer s Web site Valve regulated lead acid sealed cell batteries do require periodic maintenance Although maintenance of electrolyte levels is not required visual inspections and checks of battery voltage and connection resistance should be made Liebert9NX 34 Maintenance NOTICE Risk of improper cleaning Can cause equipment damage Batteries should be cleaned with a dry cloth or a cloth lightly moistened with water Do not use cleaners on the batteries Solvents can make the battery cases
47. k link back to UPS Web page Many pager systems will forward e mail to your wireless pager so you can be informed anywhere 3 Safe system shutdown Preserves data integrity and minimizes recovery delays with automated system shutdown MopUPS monitors the UPS for power failure low battery or other events that jeopardize com puter power and initiates controlled system shutdown While it is always possible to use a serial connection Emerson recommends employing a ManageUPS network SNMP adapter for communication between MopUPS Professional and Liebert NX so that multiple Server Systems can communicate with the UPS via Ethernet With Liebert NX in redundant parallel configuration MopUPS P R Edition monitors all the connected Liebert NX units simultaneously It acquires load data estimated capacities and other measurements from individual modules and groups them together according to whether the system 1s serial or parallel redundant and whether it is centralized or parallel distributed with or without redundancy This special edition of MopUPS can analyze module specific conditions and report situations that may affect redundancy or power margin ManageUPS Net Adapter is required when using MopUPS P R Edition For more details see http connectivity Emersonpower com 27 Liebert NX Options 3 3 3 4 Manage UPS Adapter ManageUPS NET Adapter III offers an open approach to network power management by delivering a compl
48. ker MBB to lock it open b Reinsert the key into the solenoid The UPS system may now be transferred from bypass to UPS see 2 5 3 Load Transfer and Retransfer Single Module System 2 5 6 1 N System Transfer load from UPS to Bypass 1 On each module press the Stop Inverter button on touchscreen NOTE The inverters will stay online until the Stop inverter button is pressed on the last module 2 3 This will transfer the UPS system to bypass If transferring to a wrap around Maintenance Bypass a Ifusing a key interlock system 1 The OK to transfer lamp on the key release unit will light 2 Depress the key release unit push button 3 Turn the key and remove it from the key release unit 4 Insert the key into the lock for the Maintenance Bypass Breaker MBB 5 Retract the bolt b Close the Maintenance Bypass Breaker MBB c Open the Maintenance Isolation Breaker MIB The UPS system is now isolated from the critical load and the load 1 now on Maintenance Bypass d Ifusing a key interlock system 1 Remove the key from the lock for the Maintenance Isolation Breaker MIB 2 Replace the key into the solenoid 21 Liebert NX Operation 2 5 7 2 5 8 2 5 9 1 N System Transfer load from Bypass 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 Forevery module in the system close the Bypass I
49. llable batteries Keep units upright Do not stack Do not tilt Call 1 800 LIEBERT before moving battery cabinets after initial installation For systems using DC sources other than batteries refer to the manufacturer s recommendations for handling and care NOTE Materials sold hereunder cannot be used in the patient vicinity e g use where UL cUL or IEC 60601 1 is required Medical applications such as invasive procedures and electrical life support equipment are subject to additional terms and conditions NOTICE This unit complies with the limits for a Class digital device pursuant to Part 15 Subpart J of the FCC rules These limits provide reasonable protection against harmful interference in a commercial environment This unit generates uses and radiates radio frequency energy and if not installed and used in accordance with this instruction manual may cause harmful interference to radio communications Operation of this unit in a residential area may cause harmful interference that the user must correct at his own expense Liebert NX 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 1s free of the disturbances and variations in voltage and frequency common to utility power which 1s subject to brow
50. nder 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 Only test equipment designed for troubleshooting should be used This is particularly true for oscilloscopes Always check with an AC and DC voltmeter to ensure safety before making contact or using tools Even when the power is turned Off dangerously high potential electric charges may exist at the capacitor banks and at the DC connections All wiring must be installed by a properly trained and qualified electrician All power and control wiring must comply with all applicable national state and local codes One person should never work alone even if all power is disconnected from the equipment A second person should be standing by to assist and to summon help in case of an accident 1 LiebertNX 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 A 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 installation Battery cabinets contain non spi
51. nouts blackouts surges and sags The Liebert NX utilizes the latest in high frequency double conversion pulse width modulation technology and fully digital controls to enhance its reliability and increase the ease of use As shown in Figure 1 the AC utility source is input to the rectifier converts the AC utility into DC power The inverter converts that DC power from the utility or DC power from the DC source into AC power for the load The DC source will power the load through the inverter in the event of a power failure The utility source can also power the load through the static bypass If maintenance or repair of the UPS is necessary the load can be switched without interruption in service to the optional maintenance bypass Figure1 Typical single module UPS system one line diagram Module Bypass UPS Module AC Input L 3 Wire GND Module Rectifier AG Input __ UPS Output Critical 3 Wire GND 3 Wire Load 2 Wire GND See Note 2 To DC Supply 1 UPS rectifier bypass input and output cables must be run in separate conduits 2 All power cables from DC supply should be sized for a total maximum of 2V drop at maximum discharge current 3 Control wiring and power wiring must be run in separate conduits 4 Emerson recommends installing grounding conductors 5 Standard configuration has CB1 removed If CB1 is required option must be ordered 3 LiebertNX Introduction 1
52. nput Breaker BIB or verify that it 15 closed This breaker is external to the UPS it may be in the Maintenance Bypass Cabinet 3 For every module in the system close the Module Output Breaker MOB or verify that it is closed This breaker is external to the UPS it may be in the Maintenance Bypass Cabinet 4 Place all modules in Bypass mode see Steps 1 and 2 in 2 5 2 Startup 1 N System 5 Iftransferring to a wraparound Maintenance Bypass a Ifusing a key interlock system 1 Depress the key release unit push button 2 Turn the key and remove it from the key release unit 3 Insert the key into the lock for the Maintenance Isolation Breaker MIB 4 Retract the bolt b Close the Maintenance Isolation Breaker MIB c Openthe Maintenance Bypass Breaker MBB Load is now on UPS Internal Bypass d Ifusing a key interlock system 1 Remove the key from the lock for the Maintenance Bypass Breaker MBB to lock it open 2 Reinsert the key into the solenoid 6 Select the Start Inverter icon on the USER LCD of Module 1 It is recommended that you start with Module 1 and then continue in order when instructed to do so 7 Verify that Inverter pending on command message is displayed in the INVERTER section of the Status screen 8 Repeat Steps 6 and 7 for the remaining modules After the Start Inverter icon the last module has been selected all inverters will turn On simultaneously Shut Down Single Module
53. o Da Vinci 8 Zona Industriale Tognana 35028 Piove Di Sacco PD Italy 39 049 9719111 39 049 5841 257 Asia 29 F The Orient Square Building F Ortigas Jr Road Ortigas Center Pasig City 1605 Philippines 63 2 687 6615 Fax 63 2 730 9572 EmersonNetworkPower com AC Power Embedded Computing Outside Plant Racks amp Integrated Cabinets Connectivity Embedded Power Power Switching amp Controls Services DC Power Infrastructure Management amp Monitoring Precision Cooling Surge Protection Emerson Business Critical Continuity Emerson Network Power and the Emerson Network Power logo are trademarks of Emerson Electric Co or one of its affiliated companies 2012 Emerson Electric Co
54. o test done Start Battery Stop Battery test Test Battery Test progress bar BATTERY ME Voltage Current Temperature Capacity Estimated Runtime 544V 0 2A 20 C 4 F 80 96 94m Liebert NX 12 Operation 2 2 06 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 LIFE net status LIFE net option LIFE net Present Disabled Operating mode Service Current UPS date time 11 03 11 12 22 01 Ups calls status 11 03 11 12 20 00 Enabled Next scheduled call Emergency calls Delayed call in 1 LIFE net status LIFE net option Present Not present available on the UPS LIFE net Enabled Disabled been started Current UPS dd mm yy hh mm ss date time time stamp the Life data Set Sampling Set sampling service mode Toggles LIFE net operating modes between service and sampling service is used when UPS maintenance is Mode button in progress ype Routine call Emergency call Manual call he UPS is making its regular call he UPS is making an Emergency call e UPS is making a Manual Call or an automatic extra call to an emergency condition which is no longer active he UPS is making a call to empty its diagnostics history buffer which
55. or starting and shutting down the inverter The start stop control incorporates a safety feature for preventing accidental operation When the start or stop function for the inverter is selected a pop up window appears asking for confirmation of the action Reset Fault Reset faults becomes red when there is a system fault Alarm Silence Silence the buzzer in the case of an alarm NOTE If screen is inactive for 30 seconds the LCD will revert to this page 9 LiebertNX Operation 2 2 2 Status This menu item displays a list of current Fault Warnings and Info Figure8 Status WARNING FAULT External Battery Breaker open A Battery Temperature Probe 34 019 24 017 Close the Battery Breaker Temperature probe is not connected or broken 14 003 Battery Charging 04 000 1 Battery Warning 08 005 1 MUN reboot required MUN initialization finished but reboot is required 00 009 i Inverter on Rectifier Inverter is supported by Rectifier 02 002 i Rectifier On 02 013 4 Precharge Finished 06 002 4 Inverteris On 06 005 i Source of synchronization is the bypass Bypass o9 01 002 i Bypass is off amp Charger 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
56. ound Keep it clean Maintain the UPS free of dust and moisture Keep it cool Battery systems must be kept in the range of 72 77 F 22 26 C in order to meet design specifications for capacity and longevity The UPS will reliably meet all performance specifications and design life at temperatures up to 104 F 40 However performance and longevity will be optimized when the UPS is operated at the same temperature as the batteries Contact your local Emerson sales representative or call 1 800 LIEBERT for further details Keep connections tight Tighten all connections at installation and at least annually thereafter see Table 6 Battery retorque values Keep it inspected Periodically inspect external upstream and downstream circuit breakers to assure that the trip current settings are correct Become familiar with typical ambient conditions surrounding equipment so that abnormal conditions may be more quickly recognized Know what typical meter readings are and where adjustable settings should be Record Log Set up a maintenance log to record scheduled checks and any abnormal conditions The log should have space for all metered parameter indications including phase readings alarm messages UPS mode of operation air filter replacement date and observation notes A second log should be maintained for the DC source as directed by the DC source manufacturer A periodic walk through inspection of the UPS and DC source
57. r life cycle and require replacement in less than 10 years The following components utilized in your UPS system have a limited life cycle and are specifically exempt from warranty To prevent a wear out failure of one of these components affecting your critical load operations Emerson recommends these components be periodically inspected and replaced before the expected expiration of their life cycle The expected life of each component listed below is simply an estimate and is not a guarantee Individual users may have site specific requirements maintenance and other environmental conditions that affect the length of the component s useful life cycle In most cases replacement components must exactly match the original component specifications These replacement components are not readily available from third party component distributors For assistance with your specific component specifications replacement component selection and sourcing call 1 800 LIEBERT For customers using Liebert Services preventive maintenance periodic inspection of these components is part of this service as well as recommending component replacement intervals to customers to avoid unanticipated interruptions in critical load operations Battery Maintenance Table 4 UPS component service life Component Expected Life Replace in Power AC Filter Capacitors gt 7 years 62 000 hours 5 to 6 years Power DC Filter Capacitors gt 7 years 62 000 hours
58. rator and any test equipment must be isolated from direct contact with earth ground and the UPS chassis frame by using rubber mats Some components within the cabinets are not connected to chassis ground Any contact between floating circuits and the chassis is a lethal shock hazard Use differential oscilloscopes when measuring a floating circuit Exercise caution that the test instrument exterior does not make contact either physically or electrically with earth ground In case of fire involving electrical equipment use only carbon dioxide fire extinguishers or others approved for use in fighting electrical fires WARNING Risk of electric shock and high short circuit current Can cause equipment damage personal injury and death Always identify connecting wiring prior to disconnecting any wiring Do not substitute parts except as authorized by Emerson Corporation Maintain the UPS cabinets free of foreign materials such as solder wire cuttings etc Contact Liebert Services if you are not sure of the procedures to follow or if you are unfamiliar with the circuitry Liebert9NX 30 Maintenance 4 2 4 2 1 Liebert Services Startup UPS maintenance DC source maintenance and training programs are available for the Liebert NX UPS through your Emerson sales representative Professional Startup UPS Startup Emerson customer engineers perform a thorough non powered inspection of the units and will then conduct
59. rooms is advised to check for visible and audible indications of problems Log the inspection metered parameter indications and any discrepancies Air Filters The air filters must be inspected and serviced on a regular schedule The period between inspections will depend upon environmental conditions Under normal conditions the air filters will require cleaning or replacement approximately every two months Abnormal or dusty conditions will require more frequent cleaning and replacement of air filters Inspect installations in new buildings more often then extend the inspection period as experience dictates All Liebert NX models have a replaceable air filter inside the front doors These filters can be changed while the UPS is in operation 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 specifications Liebert9NX 32 Maintenance 4 3 3 Limited Life Components 4 4 The Liebert NX 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 currently available component material manufacturing technology limitations and the general function and use of the component a few components in your Liebert NX will have a shorte
60. s circuit breakers All power through the UPS is removed from the load Typically the REPO circuit also opens the circuit breakers that provide power to the bypass lines and the UPS controls Refer to 2 5 8 Shut Down Single Module UPS System Figure 18 Remote Emergency Power Off 2 5 SSS tpm um 1 Module Bypass AC Input Module Rectifier 1 9 Manual Operations All Systems The Liebert NX UPS is designed to function while unattended by an operator The system control logic automatically handles many important functions as explained in 2 16 Automatic Operations Other procedures must be performed manually Manual procedures available to the operator include startup load transfers and shutdowns These procedures are performed by using the touchscreen and some manually operated circuit breakers and switches This section lists typical step by step instructions Startup Including initial startup recovering from input power failure recovering from DC source shutdown and recovering from shutdowns for emergencies or maintenance Load Transfers Including transfers from UPS to bypass and retransfers from bypass to the UPS system Maintenance Bypass Load Transfers Including transfers from internal bypass to maintenance bypass and transfers from maintenance bypass to internal bypass Shutdowns Including module shutdowns for maintenance and emergency shutdowns NOT
61. s and Inverter both Off Stop battery test see Note 4 below Notes 1 Each signal can be inverted 2 Each signal can have a turn on delay applied from 0 60 seconds 3 Each signal can have a turn off delay applied from 0 60 seconds 4 To guarantee that the command is accepted keep the function active at least 10 15 seconds 3 4 2 Available Selectable Output Contacts Summary Alarm fault warning Residual Battery Autonomy is Expiring Inverter On Bypass Active AS400 like Inverter Operation Self Clocked Summary Fault Bypass Stopped Due to Fault Summary Warning Imminent Shutdown Inverter Overload Rectifier Mains Failure Battery Overtemperature Battery Prewarning Level Load 25 Load 50 Load 75 Load 100 Load 105 Power Loss Prewarning Backfeed Fault Notes 1 Each signal can be inverted Inverter Not On Rectifier or Bypass Mains Failure Load Supplied by battery Maintenance Bypass Switch Closed Shutdown Command Pending Inverter Stopped Due to Fault Rectifier Fault Inverter Over Temperature warning Battery Undervoltage Rectifier or Bypass Mains Failure Bypass Mains Failure SGS on Standby Generator Set Battery Capacity 25 Battery Capacity 50 Battery Capacity 75 Battery Capacity 100 Line Fault Summary Alarm OR Line Fault Power Loss Alarm 2 Each signal can have a turn on delay applied from 0 to 60 seconds 3 Each signal can have a turn off delay applied from 0 to
62. s reports and event files Adjustment programmable parameters The touchscreen display has a blue background and multicolored text The display turns On automatically but dims and the backlight goes out after 15 minutes of inactivity Touching the screen will reactivate the backlight for 15 minutes If any screen other than the mimic screen is accessed that screen will be displayed for 5 minutes without any interaction If there is no activity for 5 minutes the display will revert to the basic mimic screen Figure2 Main component locations 225 to 300kVA Liebert NX HMI Screen Bypass Busbars A B C Rectifier Input Busbars A B C Optional Main Input Circuit Breaker CB1 Backfeed Circuit Breaker Output Busbars A B C Input Ground Busbar Battery Busbars FRONT DOORS REMOVED DOORS AND INNER SKINS REMOVED Liebert NX 6 Operation Figure3 Main components 400 600kVA Liebert NX HMI Screen Main Input Circuit Breaker CB1 Optional Backfeed Circuit Breaker BFB External Communication Panel E Jol LT b 2 hi B a Hg
63. sconnect MBD Verify that this external breaker is open or tripped If DC source cabinets are used verify that breakers on all the cabinets are open Bypass Circuit Breaker BFB This circuit breaker see Figures 2 and 3 should be open Apply power to all modules If the equipment does not have CB1 installed the rectifiers of all modules will start automatically If is installed close for all modules and allow the rectifiers on all modules in the system to start Verify that the rectifier on each module has started and that the LCD is fully functional before proceeding Make sure none of the UPS module inverters has started After all module rectifiers are started and the LCDs are functional with no parallel module warnings or faults Close the MOB for Module 1 Close the BFB for Module 1 and ensure the BPSS is active for the module inverter is Off The BPSS should automatically activate when ready Close the MOB for the remaining modules Close the BFB the remaining modules Verify that all module static switches are active Select the Start Inverter icon on the USER LCD of Module 1 It is recommended that you start with Module 1 and then continue in order when instructed to do so Verify that Inverter pending on command message is displayed in the INVERTER section of the Status screen Repeat Steps 4 and 5 for the remaining modules NOTE After the Start Inverter icon on the last module is
64. sconnect has an undervoltage release mechanism designed to ensure that during any shutdown or failure mode all battery potential is removed from the UPS system Maintenance Bypass This switchboard provides make before break maintenance bypass It includes Maintenance Bypass Breaker MBB and Maintenance Isolation Breaker MIB Load Bus Synchronization The Load Bus Sync LBS option keeps independent UPS systems and therefore their critical load buses in sync even when the modules are operating on DC source or asynchronous AC sources This means that critical loads connected to both load buses can switch seamlessly between the two Temperature Compensated Charging When the battery temperature exceeds a preset limit typically 77 F 25 C this optional circuit proportionally reduces float charging voltage to prevent overcharging the battery Battery Load Testing When activated this option forces the battery string to assume the load for a short period of time 5 LiebertNX 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 statu
65. selected all inverters will turn On simultaneously It will not be necessary to check the Inverter pending on command on the last module 19 Liebert NX Operation 2 5 3 2 5 4 Load Transfer and Retransfer Single Module System 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 2 6 Automatic Operations Transfer Procedure 1 Press the Stop Inverter menu button on the touchscreen 2 Theload will transfer to Bypass mode and Inverter will turn Off Retransfer Procedure 1 Press the Start Inverter menu button on the touchscreen 2 TheInverter will synchronize with the bypass and transfer the load to Normal mode Maintenance Bypass Load Transfers Single Module System If Load is on UPS Bypass Follow these instructions to manually transfer the load between the Maintenance Bypass and the UPS bypass line Do not transfer the load between the Maintenance Bypass and the UPS module inverter output Use the Monitor Mimic Display screen to verify that the UPS bypass line is available NOTICE Risk of improper operation Can cause equipment damage Failing to follow the proper sequence when operating any circuit breaker may cause damage to the connected equipment Operating a Maintenance Bypass circui
66. t breaker out of sequence could cut Off power to the critical load NOTICE Risk of improper operation Can cause equipment damage The UPS system must be on internal bypass before the following procedures are performed or the MIB or the MBB is operated Doing so may damage to the UPS and the critical load may be lost 1 Transfer the UPS system to bypass see 2 5 3 Load Transfer and Retransfer Single Module System The OK to transfer lamp on the key release unit will light NOTE If the maintenance bypass cabinet or switchboard has any other type of custom interlock follow the specific instructions for that interlock system to remove the key 2 Ifusing a key interlock system a Depress the key release unit push button turn the key and remove from key release unit NOTE The UPS system is now locked in bypass and cannot be retransferred to the inverter until the key is reinserted b Insert the key into the lock for the Maintenance Bypass Breaker MBB retract the bolt 3 Close the Maintenance Bypass Breaker MBB NOTICE Risk of improper operation sequence May cause equipment damage Failure to close the Maintenance Bypass Breaker MBB will interrupt power to the load 4 Openthe Maintenance Isolation Breaker MIB The UPS system is now isolated from the critical load and the load is now on Maintenance Bypass 5 If using a key interlock system a Remove the key from the lock for the Maintenance Isolation Breaker
67. tery Test Status Specify details of the last battery test executed Automatic Battery Test Status Specify details related to Automatic battery test Battery Test The following commands can be set using this page Enable automatic battery test Using this command the Automatic Battery test is enabled using the existing parameter configuration Configure and manage Manual Battery test Features Test duration and Min Voltage can be modified using the and button Start battery using dedicated command button Start Battery Test Test duration can be monitored on a dedicated progress bar Battery test progress bar While the test is running it can be aborted with a dedicated Stop command button Stop Bat tery Test Battery test status provides immediate information about test status 11 Liebert NX Operation Battery Measures This section monitors variables applicable to the battery Figure 10 Battery parameters Battery Status Battery Test Battery Measurement Battery Status Battery warning Charger Status Charger is on Battery Test Status Lasttest date 27 02 01 19 00 00 Result No test done Automatic Battery Test Status Test Status Enabled Test Interval 74 h Inhibit time 24 h Next Schedule time 39004 min Automatic Battery Test Enable Automatic Battery Test Manual Battery Test Test Duration 00 10 min sec Min Voltage 1 65 V Battery Test Status Battery Test Status N
68. the combinations may be used at a time Other combinations may be possible For further information see http connectivity Emersonpower com The following interfaces can be found on the Liebert NX Table 3 Connectivity combinations Interface Description Input Output Serial CAN Slot available for use with a connectivity option typically ManageUPS NET Ill Adapter XS6 Slot for the LIFE net slot modem Serial Standard serial interface RS232 COM female Available if XS3 slot is empty or MUN III card is installed Standard serial interface RS 232 COM for external LIFE net kit e g X6 LIFE net GSM modem only is XS6 is empty male Not available ifa Serial XS6 slot modem is installed XS3 Serial X3 Serial X19 2x15 pole screw connector for parallel UPS connection X20 RJ45 interface for synchronization with external signal TB1 ad screw connector for input contacts see 3 4 1 Available Input electable Input Contacts TB2 Padua Dr uaa contacts see 3 4 2 Available Output XT 3 8 4 pole screw for EPO input and output Input and Output XT1 External battery temperature sensor connection Input TB3 Battery Interface and SKRU Key Status Input and Output TB4 SKRU Enable Status Input and Output Liebert NX 28 Options 3 4 1 Available Selectable Input Contacts On Gen Fast Power Off MBB Aux Contacts Start battery test see Note 4 below Fault acknowledge Bypas
69. to the lock for the Maintenance Bypass Breaker MBB e Retract the bolt Close the Maintenance Bypass Breaker MBB Open the Maintenance Isolation Breaker MIB The UPS system is now isolated from the critical load and the load is now on Maintenance Bypass If using a key interlock system a Remove the key from the lock for the Maintenance Isolation Breaker MIB b Replace the key into the solenoid Open the MOB breakers of each module If UPS bypass shutdown is required open the Bypass Input Breaker BIB This breaker is external to the UPS it may be in the Maintenance Bypass Cabinet Load Transfer 1 N System Remove a UPS from System Collective 1 Ensure there are enough modules online to support the load before proceeding 2 Open the MOB breaker of the module to be removed Load Transfer 1 N System Add a UPS to the System Collective NOTICE Risk of loss of power to the critical load Can cause equipment damage Do not turn On control power to an offline module if the collector bus is being fed by the bypass line s of the UPS module s connected to the collector bus Doing so will turn Off the static switch es of any module connected to the collector bus and remove power from the load bus This section lists typical step by step instructions The touchscreen will list all steps required for the process based on the unit s condition and other factors 1 Provide power to all the UPS controls to permit th
70. y analysis on a per site basis This analysis generally known as an End to End Fault Coordination Study must be done by a registered professional engineer experienced in this activity and familiar with local codes and related requirements Liebert strongly recommends periodic inspections of the bypass feeder breaker instantaneous trip settings as well as the module input rectifier feeder breaker trip settings to ensure that they are correct For a variety of reasons although typically during circuit breaker maintenance procedures by others trip settings have been known to be inadvertently left improperly set Correct trip setting of these circuit breakers is most important to achieving high availability from your Liebert UPS system For further information regarding proper trip settings for your feeder breakers call 1 800 LIEBERT The instantaneous trip setting of the breaker feeding the UPS bypass input should be high enough to accommodate short duration overloads The bypass static switch power path inside the UPS can draw up to 10 times the system s rated current for up to three cycles While Emerson can provide typical guidelines the responsibility for the proper breaker trip settings outside the Emerson manufactured UPS equipment resides with the owner Contact Liebert Services at 1 800 LIEBERT for further information 37 Liebert NX Specifications 5 0 SPECIFICATIONS 5 1 DC Sources 5 1 1

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