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Emerson 250-400kVA Power Supply User Manual

1. Input Frequency Hz 60 Permissible Input Frequency Range Hz 55 to 65 Input THDi at nominal voltage at full load lt 10 with 6 pulse and passive filter Input Power Factor at nominal voltage gt 0 92 Flexi Power Walk In sec 3 to 30 selectable in 1 sec Increments Battery amp DC Parameters VRLA Valve Regulated Lead Acid or FLA Battery Type Flooded Lead Acid Nominal Battery Bus VDC 480V Battery Float Voltage VDC 540V End Cell Voltage VDC 384 for VRLA FLA DC Ripple Voltage in float amp Const V Ch mode lt 1 RMS value lt 3 4 Vpp Temperature Compensated Battery Charging Standard with temperature probe Output Parameters Inverter Type IGBT based Sine Sine PWM Controlled Output Power kW 225 270 360 Output Voltage 480VAC 3 ph 4 w Output Voltage Regulation lt 1 3 phase RMS average Output Voltage Regulation 100 Unb Load lt 2 3 phase RMS average Output Frequency Hz 60 Output Frequency Regulation 0 1 Output THDu at Nominal Voltage Linear Load lt 2 Output THDu at nominal voltage Including a 100kVA Non Linear Load per EN 62040 3 2 5 max Capacity to Handle Step Load Transient Recovery Linear Loads msec 0 100 or 100 0 within 5 peak to peak in one line cycle Capacity to Handle Leading PF Load a 0 5 lag to 0 9 lag Up to 0 8 wit
2. Location Input Voltage Frequency Output Voltage Frequency Battery Reserve Time TABLE OF CONTENTS BATTERY CABINET PRECAUTIONS au av 0 00 ur vnr ee eee eee eee eee eee eee eee 2 IMPORTANT SAFETY INSTRUCTIONS 00000 cee eee a 1 1 0 INTRODUCTION fo onn A ee nd sat 2 1 1 General Description sri dane ee eee ee nent nent tenn ene 2 1 2 Mod s of Operations vu sr aud Rasa oars Oa aa es Sata Oh eld Gas aes NS we eae 2 1 24 NormalM de su este e est ba SPN I A SR ea ea eda 2 L22 Bypass Mode ursine seerne Sees aes Acacia ee ok 3 12 3 Battery Mode asortert a ties 3 1 2 4 Maintenance Bypass 3 1 3 Options 25 34 85 boone Serra WR A east BE eh A BE PG 3 2 0 OPERATION 20302032 ee Ka ee ee Ee ee see Sees 5 2 1 Features m sales ker kvad see BA ly talet Pole Bee eos dae lao vie 5 2 2 Touchscreen Navigation 9 22 1 Mam Display CESEN rare seinen dei ene tek dressene ketil desse kulens se ste 9 222 Conti gurations Menu van asus aka seen seks syde ke he kaste sig 10 228 Status Reports Menu sa skudd arkade dd befal vat s 14 22A Startup Men a ad au ark debet sus eng 14 22 5 Shutdown Men 0 0 0 ccc ce ee eee narr renn naar rer 15 2 2 6 Transfer Men ul miee bb id Lede as Wd add da de 16 2 2 7 Battery Management Menu 17 XAB Meter dae OAs cohen ee adle Deere a Ae Hede me de sere de dd Sed 19 229 Helpe A ek TESE kran enk ee 19 22 10 ROSS ous fear tis Be eee ERE TTS 19 2 201 ASU
3. satt Discharging 4 ER 440 0 Input Line Fail 4 T 420 O Bypass Line Fail 0 Input Filter open 0 4 8 12 16 20 24 28 32 36 40 44 48 52 56 60 manual xfer Inhibit BREE 4 Remaining min 5 Total Disch hh mm ss 00 31 29 Charge 12 CONFIG STATUS REPORTS STARTUP SHUTDOWN TRANSFER BATT MGT METERING HELP Manual Battery Test Start Stop Manual Battery Equalize For Service only Commissioning For Service only Battery Cycle Monitor Displays how many discharges have occurred for these time periods 0 30sec 31 90sec 91 240sec 4 15min 15 30min 30 60min 60 240min 4 8hrs 8hrs and up Each discharge record will include see Figure 20 Max KW Date AH Time Start Temp C Duration End Temp C Start KW Battery CB Start Min KW Battery CB End 17 Operation Figure 20 Battery cycle monitor BYPASS B e L L 495 496 494V Freq 60 0H2 BATTERY 1 OF 2 Voltage 533 Y Temp 26 C Charge 92 Legend Inlet Air Temp 23 C 0 30 Sec 23 ase 041 8 4 2008 19 13 32 00 00 43 f 2 Detail 31 90 Sec fe 040 7 31 2008 18 45 56 00 00 46 103 3 110 2 Detail aS FT 039 1 31 2008 18 25 20 00 00 46 103 4 110 3 Detail 038 1 31 2008 18 04 15 00 00 12 48 48 57 oE Detail 4 15Min IP 037 1 31 2008 18 03 01 00 00 04 56 54 56 op Detail 15 30 Min FT 036 1 31 2008 18 01 46 00 00 16
4. tracts for battery maintenance Again the coverage needed will depend on the type of battery pur chased and the degree of support required from Liebert Services Training Customer training courses include the proper operation of the system emergency procedures preven tive maintenance and some corrective maintenance Warranties Contact Liebert Services if you have any questions regarding the warranty on your Liebert NXL UPS or the batteries 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 NOTE Service and maintenance work must be performed only by properly trained and qualified personnel and in accordance with applicable regulations as well as with manufacturers specifications 32 Maintenance 3 3 1 3 3 2 The UPS is designed for unattended operation but does require some common sense maintenance Keep good records Troubleshooting is easier if you have historical background Keep it clean Maintain the UPS free of dust and any moisture Keep it cool Battery systems must be kept 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 spec
5. Event Message Regen Terminated Event Definition Regeneration Mode is a service mode that is normally controlled by the service technician Regeneration Mode Status or Alarm messages are generally intended for the service person This status message informs the user that Regen Mode is no longer active This status message is self clearing When the condition is no longer present the alarm and any control activity tied to the alarm reverts to normal Recommended Action Under normal circumstances none If this message is active and there is no clear reason why the UPS was in Regeneration Mode or if the command to terminate Regeneration Mode was not issued contact your factory authorized service provider Remote Off BPSS The Static Bypass Switch BPSS was turned off by an external signal This indicates an external signal forcing the BPSS to remain off is active This type of signal is wired into an Input Contact Isolator and the specific channel is assigned as Remote Off BPSS This status message is self clearing When the condition is no longer present the message and any control activity tied to the status event reverts to normal Check the state of the Remote Off BPSS signal If this signal is not active or if no signal wires are present contact your factory authorized service provider Remote Off Inv The Inverter was turned off by an external signal This indicates an external signal forcing the
6. b Neither System in Maintenance Bypass c No Bypass Input or Synchronization errors present on either system If the cause of the alarm cannot be determined by checking both Systems contact your factory authorized service provider LBS Operating Load Bus Synchronization LBS is enabled and is active This status message informs the user that one system in an LBS system has lost its synchronization source usually its own Bypass and is now synchronized to the other system by the LBS controls This status message is self clearing When the condition is no longer present the alarm and any control activity tied to the alarm reverts to normal Under normal circumstances none If this message is active and there is no clear reason why the LBS circuit should be active contact your factory authorized service provider Leading Pwr Factor With a load of 80 or greater the controls have calculated the output Power Factor to be less than 95 leading Leading Power Factors result in wasted energy If the Power Factor is less than 95 leading the UPS output is de rated to compensate for output losses This alarm is self clearing When the condition is Press SILENCE to silence the audible alarm Check the Output Meter readings and verify the Output Power Factor If the displayed power factor is less than 95 leading and the load is greater than 80 reduce the load or investigate Contact your factory author
7. to transfer the load to the bypass source Note that transferring to bypass could expose the load to an outage if the bypass source fails If the battery is discharging because of a fault such as Rectifier Fault in the Active Event Window rather than an actual power outage transfer to bypass if available and contact your factory authorized service provider Batt Equalizing The batteries are being equalized Battery equalization stops automatically based on the Equalize Time Setting This status message is self clearing When the condition is no longer present the message and any control activity tied to the status event reverts to normal In normal operation no user response is required Equalize charge can be terminated at any time by pressing Battery Management Manual Battery Equalize Stop Batt Ground Fault Detected battery ground current exceeds the trip setting A possible symptom that could cause this alarm is a leaking battery This alarm has a higher detection setpoint than Battery Ground Fault Current Warning and if present means that the Battery Ground Fault Current is excessive This alarm could cause Battery Breakers to trip if the Battery Ground Fault Trip Enable setting is enabled Press SILENCE to silence the audible alarm Are any Battery Circuit Breakers tripped Perform a visual inspection of the batteries in the tripped string s Look f
8. A ANSI C62 41 Category A3 amp B3 ISTA Procedure 1H WEEE 41 SPECIFICATIONS 42 UPS Alarm and Status Messages APPENDIX UPS ALARM AND STATUS MESSAGES Table 7 shows alarm and status messages as they appear in Liebert NXL s touchscreen and in the history log along with a description and recommended actions if any If the recommended action fails to correct the condition contact your factory authorized service pro vider The Service Telephone Number can be found by pressing CONFIG Ratings More gt gt on the menu bar Table 7 Liebert NXL alarm and status messages Event Message Event Definition An Automatic Restart was enabled but has failed to complete With Automatic Restart enabled the unit automatically restarts after an End of Discharge EOD event This alarm means that one of the auto restart requirements was true but failed before the restart sequence completed For example one conditional requirement for Automatic Restart to occur is that the Rectifier Input Voltage must be within acceptable limits If during the restart sequence the input voltage drops out of tolerance the Automatic Restart will fail This alarm is self clearing When the condition is no longer present the alarm and any control activity tied to the alarm reverts to normal Auto Restart Fail The condition that caused an automatic transfer to bypass failed to clear within a
9. BPSS box Low Battery under User Settings This alarm means the If bypass is available press Transfer Bypass to Warning calculated time remaining on battery is now less transfer to bypass If the bypass is qualified the than the Low Battery Warning setpoint This alarm is self clearing When the condition is no longer present the alarm and any control activity tied to the alarm reverts to normal UPS transfers to the bypass source If bypass is not available prepare to shut down critical loads or remove non essential loads in order to extend battery run time so that critical loads may be shut down in an orderly manner 56 UPS Alarm and Status Messages Table 7 Liebert NXL alarm and status messages continued Event Message Low Power Factor Event Definition The output power factor is low The output power factor is less than 70 leading or lagging A simplified explanation of power factor is the ratio of energy being supplied to energy being used by the load For a given load the current output of the UPS goes up as power factor decreases This results in the UPS output being derated For example study the following Load 100 kw 480V amps kw X 1000 volts X power factor X 1 73 square root of 3 100kw X 1000 100000 480volts X 9PF X 1 73 747 36 100000 747 36 133 8 amps Now replace the 9 power factor typical computer load power factor with 7 power fac
10. Battery Model Retorque Manufacturer Number Value UPS12 300MR 110 in Ib UPS12 350MR 110 in Ib C amp D batteries UPS12 400MR 110 in Ib UPS12 490MR 110 in Ib UPS12 540MR 110 in Ib HX205 FR 65 in Ib HX300 FR 65 in Ib Enersys HX330 FR 65 in Ib HX400 FR 65 in Ib HX500 FR 65 in Ib If you have a different 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 36 Maintenance 3 4 2 3 5 Rack Mounted Batteries If the UPS system uses a battery other than a factory supplied Matching Battery Cabinet perform maintenance on the battery as recommended in the battery manufacturer s maintenance manual available on the manufacturer s Web site Torque Requirements All electrical connections must be tight Table 4 provides the torque values for the connections in the UPS Use these values unless the equipment is labeled otherwise NOTE Refer to the
11. EN ER In Sync Jan 31 2008 Lieberte NXL 300 KVA 11 36 30 Copyright 2006 2008 CONFIG STATUS REPORTS STARTUP SHUTDOWN TRANSFER BATT MGT METERING HELP Monitor mimic display example Utility fail BYPASS A B c NI LL 0 0 ov Freq 0 0Hz BFB Ema INPUT A B Cc nu LL o OF OV I 0 0 DA CB1 Freq 0 0Hz Legend Inlet Air Temp 22 C Low Battery warning Batt Discharging Input Line Fail O Bypass Line Fail Input Filter open 0 4 8 12 16 20 24 28 32 36 40 44 48 52 56 60 Omanual xfer Inhibit 4 Remaining min 5 Total Disch hh mm ss 00 31 29 STATUS REPORTS Charge 12 CONFIG STARTUP SHUTDOWN TRANSFER BATT MGT METERING HELP Operation Figure 7 Green Normal Orange Marginal Gray Absent Black Unknown Figure 8 Green Normal Orange Marginal Gray Absent Black Unknown BATTERY 1 OF 2 Voltage 535 Y Temp 25 Charge 91 Monitor mimic display example Load on bypass UPS On Legend Inlet Air Temp 23 C RESET SILENCE A B 0 Input Filter open cB2 open Load on Bypass DC Bus Qualified CONFIG STATUS REPORTS Oman Rexfer Inhibit cB1 open O att CB2 Open Batt CBL Open Input Filter open cB2 open a CONFIG STATUS REPORTS INPUT MODULE OUTPUT Cc A B Cc EsE 485 490 491 Y LE 487 492 489 Y Amps 11 11 11 A L N 280 282 285 Y Freq 60 0 Hz Amps 170 172 174 A BYPASS KVA 47
12. HMI front panel display press OK button when Press OK to Reset EPO Latched signal message is displayed in a dialog box Verify the REPO is cleared by observing the REPO alarm in the Active Event Window is gone Restart the UPS by pressing Startup Manual Start and follow the prompts Restart in Process Automatic Restart is in progress This message clears when the Automatic Restart sequence is complete To complete the Automatic Restart follow the prompts on the display Restart Inhibited Automatic Restart of the UPS is not allowed because of an external signal Automatic Restart Inhibit is active when signaled from an external source The signal is wired into Input Contact Interface ICI 1 Investigate and resolve the external signal forcing the UPS to remain off If you do not have an ICI or if there are no external off signals input to the UPS contact your factory authorized service provider 61 UPS Alarm and Status Messages Table 7 Liebert NXL alarm and status messages continued Event Message Service Code Active control activity tied to the alarm reverts to normal Temp Sense Fail Event Definition This event is for informational purposes and informs the user that Service Code is currently running This status message is self clearing When the condition is no longer present the alarm and any An equipment temperature sensor is reporti
13. Management System Commissioning Event Battery Cycle Management Monitoring Internal Option Settings Operation 2 2 2 Configurations Menu Rating This menu item will display a popup showing the following parameters see Figure 10 These parameters are entered during commissioning when the UPS is installed Figure 10 Nominal Input Voltage Nominal Bypass Voltage Nominal Output Voltage Nominal Source Frequency Nominal Output Frequency Nominal Cell Count Output kVA Output KW Configuration Type Rectifier Type Input Isolation Transformer Rating Parameters Nominal Input Voltage 480 Nominal Bypass Voltage 480 Nominal Output Voltage 480 Nominal Source Frequency 60 0 Nominal Output Frequency 60 0 Nominal Cell Count 240 Output KVA 300 Output K 270 Configuration Type SMS 44 Rectifier Type 6P F Input Isolation Transformer No More gt gt Close Unit Model Unit Serial Maintenance Bypass Model Maintenance Bypass Serial Battery Cabinet Model Battery Cabinet Serial Order Number 1 Order Number 2 Service Telephone Number Site ID Number Tag Number Unit Model 40sa300aaaac Unit Serial Maintenance Bypass Model Maintenance Bypass Serial Battery Cabinet Model Battery Cabinet Serial Order Number 1 Order Number 2 Service Telephone Number Site ID Number Tag Number Close 10 Operation User Settings System Settings These display settings can be changed from the
14. Operations Transfer Procedure 1 Press the Transfer menu button on the touchscreen 2 The Transfer Retransfer screen will appear in the multipurpose window see Figure 18 3 Ifthe UPS output is with synchronization with the bypass press the Bypass button This will transfer the load from UPS to Bypass Re Transfer Procedure 1 Press the Transfer menu button on the touchscreen 2 The Transfer Retransfer screen will appear in the multipurpose window see Figure 18 3 Ifthe UPS output is with synchronization with the bypass press the UPS button This will transfer the load from Bypass to UPS Maintenance Bypass Load Transfers To manually transfer the load between Maintenance Bypass and the UPS bypass line carefully follow these instructions Do not transfer the load between Maintenance Bypass and the UPS module inverter output Use the Monitor Mimic Display screen to verify the UPS bypass line is available 31 UPS with two breaker bypass cabinet Two Breaker Maintenance Bypass Cabinet ea MBB J Critical Load UPS Module Main Input Switchgear Battery AQ System MBD NOTICE Risk of equipment damage Failing to follow the proper operating sequence when operating any circuit breaker may cause damage to the connected equipment Operating a Maintenance Bypass circuit breaker out of sequence could cut off power to the critical load 26 O
15. battery test will stop Low Battery Warning Time Low Battery Warning Time minutes 2 to 60 depending on configured batteries default 5 min utes Battery Temperature Battery Temp Warning 30 C to 50 C default 40 C Battery Temp Limit 35 C to 60 C default 50 C Disconnect Enable Disable default disabled NOTE If Disconnect is set to Enable and the Battery Temp Limit is met the Battery breaker will open Figure 13 Battery Management Parameters Auto Test En Low Battery Warning Time minutes 0 Test Cycle weeks lo i Save Cancel Time of Day hh mm 00 00 Start Date mmm dd yyyy Jan 1 1970 Battery Temp Warning OC 32 0 F Test Duration minutes 0 0 Battery Temp Limit O C 32 0 F Minimum Battery Voltage 10 00 VpC foy Disconnect En Save Cancel Save Cancel W Float Voltage 3 24x W Cell Count Adjustment E 2 x Float Voltage 225vpC 540v Cell Count Adjustment jo Actual Cell Count Adjustment 240 Save Cancel Cell Count Adjustment Cell Count Adjustment 12 cells to 6 cells default 0 Float Voltage Battery Float Voltage Vpc 2 15 to 2 3 default 2 25 Save Cancel 13 Operation Event Management This menu item permits changing how the Liebert NXL handles Alarms Faults and Status informa tion Each event can be configured for the following Latch yes no Event stays active in the event window even if the fault condi
16. equipment Also observe the manufacturer s safety precautions pertaining to the battery along with the battery safety precautions in this section A WARNING Risk of electrical 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 battery disconnected high voltage at filter capacitors and power circuits should be discharged within 30 seconds 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 operator 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
17. is no longer present the alarm and any control activity tied to the alarm reverts to normal Press SILENCE to silence the audible alarm Try to identify which sensor has failed by observing the temperature reading inside the Battery Box on the One Line Display Cycle through all connected batteries by pressing the Battery Box on the display Contact your factory authorized service provider 45 UPS Alarm and Status Messages Table 7 Liebert NXL alarm and status messages continued Event Message Batt Temp Imbalance Event Definition With more than one Battery Temperature Sensor installed the controls are detecting too great a temperature difference between the individual sensors Recommended Action Press SILENCE to silence the audible alarm To attempt to identify which sensor is reporting an inconsistent temperature or an overheating battery observe the temperature reading inside the Battery Box on the One Line Display Cycle through all connected batteries by pressing the Battery Box If it appears this alarm is due to a specific cabinet or battery string being warmer than the others verify through investigation whether the string is actually getting warmer than the others or if the sensor appears to be reporting incorrectly Contact your factory authorized service provider Batt Test Failed An Automatic or Manual Battery Test Failed The battery Test Duration is adju
18. matched within specifications and the Static Switch Disconnects are closed ON An alarm message may be displayed to indicate Load On Bypass Figure 24 If no alarm is displayed the operating status is Load On UPS Figure 25 When the OK to Transfer message is displayed the load can be manually transferred from the UPS to bypass or the load can be manually retransferred from the bypass to the UPS To perform a manual transfer Use the Load Transfer Procedures screen Refer to 2 4 2 Load Transfer Procedures The UPS control logic will initiate an automatic transfer to bypass if an overload condition exceeds the system current versus time window or if a UPS fault is detected The control logic may initiate an automatic retransfer to the UPS system when the system is recovering from overloads lasting less than five minutes Refer to 2 6 Automatic Operations Figure 24 Load on bypass UPS available Figure 25 Load on UPS bypass available Dx BFB 20 Operation 2 3 3 Input Power Failure Load on Battery If the utility AC power source fails or is outside the acceptable range the battery plant becomes the power source for the UPS module inverters The UPS continues to supply power to the critical load and also to the UPS controls Use the Battery Time screen at the UPS modules to monitor the present battery voltage compared to the shutdown value The time the battery can sustain the load depends on the size of the lo
19. message and any control activity tied to the status event reverts to normal Bat Ovtemp Temperature Warming and Banery Temperature Setpoints If none of the Battery Boxes Warning Overtemperature Limit This alarm means the fee One Li Bi hibit a t AA E temperature in one or more battery compartments ban docu rola edi has risen above the warning setpoint excess of the temperature setpoint in the user This alarm is self clearing When the condition is settings contar your factor Authorized Service no longer present the alarm and any control vir t t maisbei ted activity tied to the alarm reverts to normal S PE Pee Warming IS DONG Te correctly investigate potential causes such as faulty air conditioning or air flow blockage and resolve Otherwise contact your factory authorized service provider The UPS is performing a battery self test The battery self test terminates automatically at ine end of the test During normal operation no user response is Battery test settings are adjustable and can be foret p P Batt Self Test accessed by pressing Config User Settings The battery test can be terminated at any time by the user by pressing Batt Mgt Manual Battery Test Stop Batt Sensor Fail The controls are sensing a failed Battery Temperature Sensor If a sensor reports a value outside the normal operating range of the sensor it is considered failed This alarm is self clearing When the condition
20. of a condition that could cause this alarm is cycling load to the UPS where the peak load exceeds the overload settings The UPS transfers on the overload re transfers to Inverter then the overload returns Once this occurs 5 times within one hour the user must manually transfer the UPS back online Recommended Action Press SILENCE to silence the audible alarm Press RESET to clear any active faults or alarms Provided there are no alarms or faults still present that could prevent a transfer press Transfer UPS to transfer back to Inverter If the transfer is successful press RESET to clear the alarm Otherwise contact your factory authorized service provider Excess Paralleling When the controls detect a high amplitude short duration overload condition on the output the static switch is turned on momentarily in parallel with the Inverter to attempt to clear the condition If the fault clears the controls turn off the static switch and the load remains on Inverter This fault condition indicates the UPS pulse paralleled too many times and is now locked on bypass auto re transfers to Inverter are inhibited Press SILENCE to silence the audible alarm Check the Module Output Meter and verify the output currents are normal the kVA kW percentages are less than 100 and the Rexfer Timeout is 00 00 Verify the Inverter box on the One Line Display is green Investigate any other act
21. specified time delay Auto Rexfer Failed An example of a recoverable transfer one which the controls may attempt to recover from automatically is an overload that exceeded the overload time curve Battery Circuit Breaker ff is open This status message is self clearing When the condition is no longer present the message and any control activity tied to the status event reverts to normal The Liebert NXL has eight battery circuit breakers Batt CB Open Recommended Action Press SILENCE to silence the audible alarm Check the active events to determine the status of the UPS If Auto Restart Fail is the only alarm present attempt a manual start of the unit by pressing Startup Manual Start then following the prompts to attempt to place the unit back online If the manual start fails or if there are other alarms present that won t clear contact your factory authorized service provider Press SILENCE to silence the audible alarm Press RESET to attempt to clear active events This does not clear the Auto Retransfer Failed alarm If all other alarm conditions clear attempt a manual transfer back to Inverter by pressing Transfer UPS If the transfer is successful press RESET to clear this alarm from the Active Event Window If the UPS fails to transfer and the active messages do not explain the reason contact your factory authorized se
22. temperature setpoint This is the second of two over temperature alarms The first Equipment Overtemperature Warning sets when the detected temperature is near the limit The controls react to this condition in various ways depending on which sensor is reporting the over temperature condition Recommended Action Press SILENCE to silence the audible alarm Check the One Line Display for system status 1 UPS Off a 2 UPS On Bypass a 3 UPS On Battery a If external Maintenance Bypass is available close the Maintenance Bypass Breaker MBB to restore power to the load Do not attempt to restart the UPS without first contacting your factory authorized service provider If external Maintenance Bypass is not available but the CB3 option is visible on the One Line Display verify the bypass line is green and close CB3 to restore power to the load Contact your factory authorized service provider Verify the bypass line is green If it is not contact your factory authorized service provider immediately and prepare to shut down the load If external Maintenance Bypass is available close the Maintenance Bypass Breaker MBB to place the load on Maintenance Bypass Do not attempt to re transfer to UPS without first contacting your factory authorized service provider If external Maintenance Bypass is not available but the CB3 option is visible on the One Line Display close CB3 Do not attempt to re trans
23. the breaker Press SILENCE to silence the audible alarm Check the One Line Display and the Active Event Window to determine which breaker or switch that should be open is still closed If a breaker that should be open shows closed or if the breaker in question actually is open but the fault is still present attempt to clear the fault by pressing RESET If the event does not reset contact your factory authorized service provider Byp Overload PhA The critical load is greater than 110 while the UPS is on bypass The controls may shut the unit down if the overload condition does not clear within the allotted time Allotted time is variable and is inversely proportional to the amplitude of the overload i e the greater the amplitude of the overload the less time the unit continues to support the load This alarm is self clearing When the condition is no longer present the alarm and any control activity tied to the alarm reverts to normal Press SILENCE to silence the audible alarm Observe the calculated load percentage on A phase displayed on the Module Output Meter If the A phase steady state load percentage exceeds 110 perform the following If Maintenance Bypass is available follow Standard Operating Procedures to transfer the load to Maintenance Bypass If Maintenance Bypass is not available but the system has an Internal Bypass Breaker CB3 on the One Line Display close CB3 Note that dep
24. touchscreen Press the box to the left of each parame ter to bring a popup window that will allow the parameter to be changed Backlight Brightness High or Low default Low Time 24hr format Adjust Hour Minute or Seconds Date MM DD YYYY format Adjust Month Day or Year Password Reset the password 4 characters alphanumeric case sensitive Language English Chinese French Spanish German Italian Portuguese Audio level Range 1 to 10 default 5 Phase labeling Auto ABC RST XYZ RYB RWB UVW 123 L1L2L3 default Automatic Unit Locator Location ID Alphanumeric System Number Alphanumeric Unit Number Number 1 through 99 Unit Label Alphanumeric Figure 11 System Settings parameters Backlight Brightness Hi Low Time 118 42 32 Date Dec 20 2007 Password Language English Audio Level 0 Phase Labeling Auto Unit Locator Save Cancel 11 Operation Adjustable Setpoints These warning and alarm settings can be changed from the touchscreen Press the box to the left of each parameter to bring a popup window that will allow the parameter to be changed Max Load Alarm Phase A 10 to 105 default 95 Phase B 10 to 105 default 95 Phase C 10 to 105 default 95 Delay second 0 to 60 default 5 seconds Manual Xfer Bypass Voltage Limits Manual Xfer Bypass Voltage Low Limit 1 to 20 default 5 Manual Xfer Bypass Voltag
25. 133 4 143 1 5 Detail 035 1 31 2008 11 44 59 00 32 45 150 3 150 170 Detail 30 60Min f 034 1 31 2008 00 0231 00 03 03 25 25 82 sj Detail 60 240 Min 033 1 30 2008 23 45 49 00 00 03 19 19 19 oE Detail 032 1 30 2008 22 39 32 00 20 03 146 142 147 103 Detail 4 BHrs o m 8 Hrs and up lg Summary Te Log Recon a Refresh Clear Log Close Display summary see Figure 21 Figure 21 Battery Commission Date Time Last Battery Discharge Date Time Active Battery Discharge Time Active Battery Amp Hours Active Battery KW Total Number of Discharges Battery cycle monitor summary BYPASS A B c L L 494 496 493V Freq 60 0Hz BATTERY 1 OF 2 Voltage 533 Y Charge 92 Legend Inlet Air Temp 23 C 2x 0 30Sec ev 31 90 Sec je Battery Commission Date Time Jan 24 2008 11 16 46 Last Battery Discharge Date Time Aug 4 2008 19 13 32 91 240 Sec Bo Total Battery Discharge Time 02 01 01 o m ounnnddtpe 4 15 30 Min E 30 60 Min nd 60 240 Min jo 4 BHrs fo 8 Hrs and up jo O Sumay All Records Log Records Refresh Clear Log Close 18 Operation Clear Log This command resets the Date of First Discharge Cycle A dialog box will warn that the data will be permanently lost and should downloaded before proceeding see Figure 22 Figure 22 Battery cycle monitor clear log 2 2 8 2 2 9 2 2 10 2 2 11 2 3 2 3 1 Data will be lost p
26. 43 C See battery manufacturer s recommendations Relative Humidity 0 to 95 without condensation Operating Elevation Sea level to 4900 ft 1500m without derating Storage Elevation Sea level to 50 000 ft 15 240m Audible Noise 68 dBA typical 5 Feet 1 5m from Unit 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 25 C is recommended 3 Ambient temperature is the maximum ambient temperature during any 24 hour period For operation at higher temperatures consult your Liebert sales representative or call Liebert Services at 1 800 LIEBERT 4 Exercise care during installation to ensure unimpeded airflow through the UPS 5 For operation at higher elevations consult your Liebert sales representative or call Liebert Services at 1 800 LIEBERT 39 SPECIFICATIONS Table 6 Electrical specifications Liebert NXL Model Size Input Parameters 250 300 400 Input Voltage to Rectifier VAC 480V 3 phase 3 wire Input Voltage to Bypass VAC 480V 3 phase 3 or 4 wire Permissible Input Voltage Range VAC 70 to 110
27. 48 50 A B c KW 52 53 55 E 491 494 491V PF 1 0 1 0 1 0 Freq 59 9 Hz KVA KW 146 146 Freq 59 9 Hz Dc BUS Volts 540 y Amps Float A e EEE EEE EEE In Sync Jan 31 2008 Lieberte NXL 300 KVA 11 38 05 Copyright 2006 2008 STARTUP SHUTDOWN TRANSFER BATT MGT METERING HELP Monitor mimic display example Load on bypass UPS module off Legend Inlet Air Temp 22 C INPUT MODULE OUTPUT A B Cc A B C Lak 485 492 490 kak 488 491 489 Y Amps 0 0 DA L N 281 282 285 Freq 60 0 Hz Amps 173 173 171 A BYPASS KVA 49 48 49 A B c KW 54 53 53 Rat 491 493 493 Y PF 1 0 1 0 1 0 Freq 60 0 Hz KVA KW 146 145 Freq 60 0 Hz Dc BUS Volts 0 Y Amps Float A Ke ae pe JER PEI In Sync Jan 31 2008 Lieberte NXL 300 KVA 11 43 14 Copyright 2006 2008 STARTUP SHUTDOWN TRANSFER BATT MGT METERING HELP Operation 2 2 Touchscreen Navigation 2 2 1 Main Display Screen Several menu items can be accessed from the main display screen see Figure 3 These menu items are detailed in subsequent sections Figure9 Menu tree Liebert NXL Menu Configurations Status Reports Startup Shutdown Transfer Battery Management Help Menu Metering Rating Event Log Manual Start Open Trap UPS re Silence System Settings System Status Device Control Open MBD Bypass Moe maret Reset Adjustable UPS Manual Battery Setpoints Equalize Battery Ei rete
28. Display BATTERY 1 OF 4 Voltage Disable Temp Disable Legend BIS MED Inlet Air Temp 0 C RESET SILENCE INPUT MODULE OUTPUT A B A B L L 0 0 o Y L L o 0 o Y Amps 0 0 0 L N 0 0 o Y Freq 0 0 Hz Amps 0 0 0 A BYPASS e 5 5 E A B EE 0 0 o Y PF 0 0 0 0 0 0 Freq 0 0 Hz KVA KW o 0 4 Freq 0 0 Hz Volts 0 y Rexfer Timeout 00 00 Aune Amps Float A 30 a oe isplay VE I UA A A Active pe gt In Sync Event Dec 18 2007 Lieberte NXL 300 KVA Menu Window 21 19 46 Copyright 2006 2007 Bar CONFIG STATUS REPORTS STARTUP SHUTDOWN TRANSFER BATT MGT METERING HELP Figure 4 Mimic display BYPASS Bypass A B C medie gt 0 0 0v BEB MODULE OUTPUT npu Freq 0 0Hz A B C Load LL 0 0 Ov LN 0 0 Ov INPUT UPS amp a 8 c AO DE 805 1 0 0 OA I LL 0 0 OV Voltage OV KVA 0 0 0 nput av KW 0 0 0 I 0 0 0 A CB1 Current Float CB2 o Power Freq 0 0Hz PF 00 00 0 0 KVAIKW 0 Freq 0 0Hz Battery P gt BATTERY1 OF 4 Rexfer Timeout 00 00 Block Voltage Disable Temp Disable isasi BIS1 MBD Inlet Air Temp 0 C Bypass Input Displays the bypass input voltage and the bypass input frequency The bypass cir cuit breaker BFB is to the right of this block The circuit breaker status is shown as open or closed UPS Input Power Displays the UPS input voltage current and frequency The input circuit breaker CB1 is to the right of this block The circuit breaker status is shown as open or closed Ba
29. Hi AC Power For Business Critical Continuity Liebert NXL Operation and Maintenance Manual 250 400kVA 60Hz Three Phase Single Module A A EMERSON Network Power BATTERY CABINET PRECAUTIONS The following warning applies to all battery cabinets supplied with UPS systems Additional warn ings and cautions applicable to battery cabinets may be found in Important Safety Instructions and 3 4 Battery Maintenance A WARNING Internal battery strapping must be verified by manufacturer prior to moving a battery cabinet after initial installation Battery cabinets contain non spillable batteries Keep units upright Do not stack Do not tilt Failure to heed this warning could result in smoke fire or electric hazard Call 1 800 LIEBERT before moving battery cabinets after initial installation Contacting Liebert for Support Contact Emerson Network Power Liebert Services for information or repair service in the United States at 1 800 LIEBERT 1 800 543 2378 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 Have the following information available before calling Liebert Services Part Numbers Serial Numbers kVA Rating Date Purchased Date Installed
30. Inverter to remain off is active This type of signal is wired into an Input Contact Isolator and the specific channel is assigned as Remote Off Inverter This status message is self clearing When the condition is no longer present the message and any control activity tied to the status event reverts to normal Check the state of the Remote Off Inverter signal If this signal is not active or if no signal wires are present contact your factory authorized service provider Remote Off Rect The Rectifier was turned off by an external signal This indicates an external signal forcing the Rectifier to remain off is active This type of signal is wired into an Input Contact Isolator and the specific channel is assigned as Remote Off Rectifier This status message is self clearing When the condition is no longer present the message and any control activity tied to the status event reverts to normal Check the state of the Remote Off Rectifier signal If this signal is not active or if no signal wires are present contact your factory authorized service provider REPO Shutdown The UPS shuts down in response to an active Remote Emergency Power Off REPO command Press SILENCE to silence the audible alarm Resolve the issue that precipitated the REPO For safety the UPS latches an REPO event There are two ways to clear the latch 1 Press the Reset pushbutton on the External Interface Board EIB 2 From
31. MEN CE RA me SO eS oR Ore da 19 2 3 Modes of Operation e even 19 23 1 Liadan Bypass is A da e ole vel ee Miah le wih Die de 19 232 OK AO Franster 25120 as ad Ga Lier Surt barks 20 2 3 3 Input Power Failure Load on Battery avvvvvvvavvvrr rv erre rer renne 21 2 34 OTT Batre ry usanne dt AT ene eat ate i 22 2 3 5 Em reency Module Off sunn ia de eee Sia dale ske inlets AR Gel Nee HM Seller ds 22 2 3 6 Remote Emergency Power Of 23 2 4 Manual Procedures sa sara amtet Sie ROEM sh Pe Gb a gs Red lie Get BIEN se 23 2417 Startup Procedure ieas e eat Led hg leh Sees Va de eet kn 24 2 4 2 Load Transfer Procedures ccc cee narrer rave reven 26 2 43 Maintenance Bypass Load Transfers cece een nes 26 2 5 Shutdown Procedures 28 2 5 1 Module Shutdown Procedure 28 2 6 Automatic Operations A A a hg 28 2 6 1 Overloads Without Transfer aaavavauv eee nent vr rea 28 2 6 2 Automatic Transfers to Bypass Overload Condition 0 0 00 cee eee ees 29 2 6 3 Automatic Transfers to Bypass UPS System Faults ooooooooooooooo 30 2 6 4 Automatic Retransfers to UPS 30 3 0 MAINTENANCE 0 A A Dae A ia 31 3 1 Safety Precautions ss A sun A OR A AA GN a G 31 3 2 Tiebert Services 1008 5 bss deo dried sagene is aust BOG Ly paa ne 32 3221 gt Brotessional Startup e seede one ae ete da o rater S s SAN 32 3 3 Routine Maintenance ns visse stars sa pesten be Ge aoe EGA ao Se 32 Bee Reco
32. Other UPS system faults will initiate an automatic trans fer 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 In an automatic transfer to bypass the output and bypass circuit breakers do not overlap as they do in a manual transfer The static bypass switch is fired closed the output circuit breaker is opened and the bypass circuit breaker is closed Bypass power is supplied to the critical load through the static bypass switch during the short time while both circuit breakers are open 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 29 Operation 2 6 3 2 6 4 Automatic Transfers to Bypass UPS System Faults For specified UPS system faults the control logic will initiate an automatic transfer to bypass fol lowed immediately by a shutdown and isolation of the UPS system The output battery MBD and input circuit breakers are open The bypass breaker will be closed if the bypass line is available Note that the bypass line is usually not
33. Refer to Table 7 for information about interpreting alarm messages Tracing a problem to a particular section is facilitated by alarm messages and the metered parameter indications NOTICE If the UPS system has an open fuse the cause should be determined before replacing the fuse Contact Liebert Services for assistance 37 Maintenance 3 6 3 7 3 8 Reporting a Problem If a problem occurs within the UPS review all alarm messages along with other pertinent data Con tact Liebert Services at 1 800 LIEBERT to report a problem or to request assistance Corrective Actions For each alarm message on the Display Screen you can find the recommended corrective action in Table 7 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 by analysis on a per site basis This analysis generally known as an End to End Fault Coordination Study must be don
34. a higher than normal exhaust air temperature If the Bypass is within limits the UPS reacts to this alarm by transferring to Bypass and shutting off the Inverter This alarm is self clearing When the condition is no longer present the alarm and any control activity tied to the alarm reverts to normal Press SILENCE to silence the audible alarm Check the Inlet Air Temperature on the One Line Display and verify the reading is accurate i e is the room temperature warmer than normal If the room temperature is warmer than normal investigate and resolve the issue If the room temperature is normal and the Inlet Air Temp reading on the One Line Display is higher than normal contact your factory authorized service provider Output Fault This summary event occurs when the detected system output exceeds acceptable limits in either voltage or frequency If the UPS was on Inverter at the time of the event the UPS transfers to bypass provided the bypass voltage is available If the UPS was on bypass at the time of the event the UPS shuts down rather than allowing unacceptable voltage to reach the load Press SILENCE to silence the audible alarm Check the Active Event Window and investigate other events to further analyze Press RESET to attempt to reset any latched events Check the One Line Display to determine the system status on UPS Bypass or Off Check the input and bypass dual input o
35. ad and the size and condition of the battery plant Alarm messages that indicate battery status are Battery Discharge Low Battery and Battery Shut down The voltage limits for these alarms are displayed on the UPS module Alarm Limit Settings screen These limits were selected for your installation by Liebert Services during initial startup The battery block in the UPS module Monitor Mimic Display indicates Charge or Discharge and the cur rent in amperes Figure 26 Input power fail load on battery BFB 21 Operation 2 3 4 Off Battery The battery plant can be disconnected from the UPS if required for battery maintenance by opening the module battery disconnect MBD circuit breaker In this situation the UPS module will continue to supply conditioned power to the critical load but if input power fails the UPS system cannot supply power to the load A CAUTION When the UPS system 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 27 Load on UPS battery not available 2 3 5 Emergency Module Off The Local Emergency Module Off LEMO mode will transfer the critical load to the bypass line and remove power from all UPS module components except the controls bypass circuit breaker and the static switch The Emergency Module Off control is a guarded pad next to the display touchscreen Figure 2 Lift the cov
36. aker depends on unit configuration It may be located in the UPS or it may be located external to the UPS This status message is informational If the breaker was not opened intentionally or if the breaker is BFB Open The purpose of the Backfeed Breaker is to F i sm actually closed and this message is active contact prevent leakage current through the bypass circuit ur facicky suthorized service brovidet during an outage y y P This status message is self clearing When the condition is no longer present the message and any control activity tied to the status event reverts to normal Press SILENCE to silence the audible alarm The Bypass Static Switch BPSS was turned off If CB3 is available visible if present on the One due to an extended overload Line Display close it to restore power to the load While the BPSS can sustain an overload greater DO NOT ATTEMPT TO CLOSE CB3 UNTIL THE than the Inverter and for a longer period of time SOURCE OF THE OVERLOAD IS IDENTIFIED BPSS Ovid there are still limits on the amplitude and duration AND ISOLATED Exceeded of overload that the BPSS can handle This alarm Once the overload source is isolated restart the indicates the overload was greater in amplitude UPS by pressing Startup Manual Start and and time than the BPSS can handle and follow the prompts therefore shut off to prevent damage to the If the overload condition does not clear or the equipment ove
37. arm Unstable generator voltage or Bypass Feeder Breaker tripped Bypass OF UF The bypass frequency has exceeded the bypass frequency limit of 5 Hz of nominal If this alarm is active transfers to bypass are disabled This alarm is self clearing When the condition is no longer present the alarm and any control activity tied to the alarm reverts to normal Press SILENCE to silence the audible alarm Check the frequency on the Bypass Meter If the frequency is outside the synchronization range investigate and resolve the issue This alarm is commonly the result of an uncalibrated generator or power anomalies on the utility feed Check bypass power for nominal limits If bypass frequency appears normal contact your factory authorized service provider Controller Error This is a summary event that indicates a DSP communication error The Controller Error event is a fault condition that indicates a loss of communications in the controls Press SILENCE to silence the audible alarm Press RESET to attempt to reset the fault Contact your factory authorized service provider 48 UPS Alarm and Status Messages Table 7 Liebert NXL alarm and status messages continued Event Message Controls Comm Fail Event Definition The Controls Communication Failure event indicates a loss of communications between the Controls and Human Machine Interface HMI The Controls Comm
38. arm in the Active Event Window is gone Restart the UPS by pressing Startup Manual Start and follow the prompts Equip Ovtemp This summary event indicates the UPS is nearing an over temperature condition Depending on which sensor is reporting the high temperature the UPS may do one of three things once the limit is reached shut down transfer to bypass or transfer to battery operation This is a potentially serious event Investigate possible causes for a rising temperature condition such as loss of air conditioning airflow obstructions etc If the ambient temperature is high due to loss of air conditioning and cannot be addressed immediately perform the following 1 Press Transfer Bypass to transfer the UPS to bypass 2 Press SILENCE to silence the audible alarm 3 Wait at least 15 minutes then attempt to reset the alarm by pressing RESET 4 Ifthe alarm clears and proper cooling has been restored to the UPS press Transfer UPS to transfer back to UPS If this alarm is present and no external factors are affecting proper cooling of the UPS contact your factory authorized service provider 50 UPS Alarm and Status Messages Table 7 Liebert NXL alarm and status messages continued Event Message Equip Ovtemp Limit Event Definition This summary event occurs when one or more internal temperatures have exceeded the maximum
39. attempt a transfer by pressing Transfer UPS If the transfer is successful contact your factory authorized service provider If the transfer is unsuccessful contact your factory authorized service provider ISS SCR Shorted The controls have detected voltage on the Inverter Line side side of the Inverter Static Switch This indicates that an SCR is shorted With the Output SCRs turned off there should be no voltage present inside the UPS This is a non recoverable fault and inhibits normal start up of the UPS Press SILENCE to silence the audible alarm Turn off Control Power to clear the event Wait 5 minutes before re applying Control Power If the fault fails to clear contact your factory authorized service representative 55 UPS Alarm and Status Messages Table 7 Liebert NXL alarm and status messages continued Event Message LBS Inhibited Event Definition With LBS operation enabled conditions required to allow LBS operation are not met Voltage or Frequency differences sensed by the LBS control are preventing the ability of LBS to function correctly This alarm is self clearing When the condition is no longer present the alarm and any control activity tied to the alarm reverts to normal Recommended Action Press SILENCE to silence the audible alarm Check both Systems and verify normal operation a Both Systems running online on inverter
40. available during Low Battery Shutdown The circuit diagram is the same as illustrated in Figure 28 for Emergency Module Off The following UPS system faults will initiate an automatic transfer to bypass DC Overvoltage Shutdown Hardware Shutdown Inverter Fault Low Battery Shutdown Output Overvoltage Overload Shutdown Overtemperature Timeout Rectifier Fuse Blown Reverse Power Refer to Table 7 for more information about these alarm messages NOTE Q A load transfer to the bypass line will be completed whenever 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 automati cally by a contact closure in the critical load equipment Refer to 2 3 6 Remote Emergency Power Off Automatic Retransfers to UPS In an automatic retransfer the two circuit breakers bypass and inverter output are both closed simultaneously for a short period of time overlap The following critical bus conditions must be present to initiate an automatic retransfer of the critical load from the bypas
41. battery manufacturer 5 manual available on the manufacturer 5 Web site for the proper torque values required for the battery Table 4 Torque specifications unless otherwise labeled Nut and Bolt Combinations Electrical Connections Grade 2 Standard with Belleville Washers Bolt Shaft Size Ib in Nm Ib in Nm 1 4 53 6 0 46 5 2 5 16 107 12 60 6 8 3 8 192 22 95 11 1 2 428 48 256 29 Circuit Breakers with Compression Lugs For Power Wiring Current Rating Ib in N m 400 1200 Amps 300 34 Circuit Breakers with Compression Lugs For Control Wiring AWG Wire Size or Range Ib in N m 22 14 3 5 to 5 3 0 4 to 0 6 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 mal function 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 1 of maximum discharge current Input current on each phase should be within 10 of the average input current Alarm messages indicate malfunction or impending malfunction daily check of the Display Screen will help to provide an early detection of problems
42. be energized If your installation includes a Maintenance Bypass you may already be supplying power to the criti cal load equipment through the Maintenance Bypass If there is no power to the critical load apply power through the UPS bypass line per the following procedure 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 1 Before you apply power to the UPS modules determine the position of the following circuit breakers and switches Input Circuit Breaker CB1 Verify that this breaker on the front of the UPS cabinet Figure 2 is in the Open position Module Battery Disconnect MBD Verify that this external breaker is open or tripped If battery cabinets are used verify that breakers on all the cabinets are open Bypass Circuit Breaker BFB This circuit breaker Figure 2 should be open NOTE Power to the critical load may already be supplied through this breaker Output Circuit Breaker CB2 This motorized circuit breaker Figure 2 should be open 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 conditions before or at the time of the shutdown Some o
43. breaker motorized must also be closed Refer to 2 4 1 Startup Procedure 2 Ifthe maintenance bypass cabinet or switchboard has an optional two key interlock system press the button on the maintenance bypass cabinet to remove the key from the solenoid 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 3 Ifusing a key interlock system insert the key into the lock for the Maintenance Isolation Breaker MIB to enable it to be closed 4 Close the Maintenance Isolation Breaker MIB 5 Open the Maintenance Bypass Breaker MBB Load is now on UPS Internal Bypass 6 Ifusing a key interlock system remove the key from the lock for the Maintenance Bypass Breaker MBB to lock it open 7 Ifthe maintenance bypass cabinet or switchboard has an optional 2 key interlock system replace the key into the solenoid 27 Operation 2 5 2 5 1 Shutdown Procedures Module Shutdown Procedure Perform a Module Shutdown Procedure when you want to remove power from a UPS module Read all warnings in 3 0 Maintenance before performing any maintenance on your Liebert NXL UPS These warnings and cautions must be observed during any work on the UPS NOTE Service and maintenance work must be performed only by properly trained and qualified personnel and in accordance with applicable regulations as well as with manufac
44. by properly trained and qualified personnel and in accordance with applicable regulations as well as with manufacturers specifications Be constantly aware that the UPS system contains high DC as well as AC voltages With input power off and the battery disconnected high voltage at filter capacitors and power circuits should be discharged within 30 seconds However if a power circuit failure has occurred assume that high voltage still exists after shutdown Check with a voltmeter before making contact AC voltage will remain on the system bypass the UPS output terminals 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 operator 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 the chassis ground Any contact between floating circuits and the chassis is a lethal shock hazard Exercise caution that the test instrument exterior does not make contact either physically or electrically with earth ground This equipment contains circuitry that is energized with high voltage Only test equipment designated 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 o
45. chronization The Load Bus Sync LBS option keeps two independent UPS sys tems and therefore their critical load buses in sync even when the modules are operating on bat teries or asynchronous AC sources This means that critical loads connected to both load buses can switch seamlessly between the two Customer Alarm Interface This optional interface board allows the input and display of eight alarms from customer supplied contacts each with a customer selected name of up to 19 charac ters The following attributes can be programmed for each alarm latching audible event log and time delay 0 to 99 9 seconds Temperature Compensated Charging When the battery temperature exceeds a preset limit typically 77 F 259C this optional circuit proportionally reduces float charging voltage to pre vent overcharging the battery Battery Load Testing When activated this option forces the battery string to assume the load for a short period of time The UPS then compares the test results to data collected during the UPS commissioning to see if the battery system appears to meet specifications The Liebert NXL will display status events for Battery Equalize Battery Self Test and Battery Com missioning when those options are active Operation 2 0 OPERATION The Liebert NXL UPS is equipped with a microprocessor based display touchscreen designed for con venient and reliable operation The display is driven by an easy to fo
46. continue This will energize the load on the UPS internal bypass 24 Operation e The Close CB1 message will appear Close CB1 see Figure 2 f The Press OK to Issue Rectifier On Command message will appear Press OK This will start the UPS rectifier Load is still on internal bypass g The Press OK to Issue Inverter On Command message appears Press OK The motorized Module Output Breaker CB2 will close The rectifier will be On and the Inverter will be on standby Load is still on internal bypass h The Press OK to Issue Transfer Command message appears Press OK The load is now energized from the UPS Inverter NOTICE Risk of equipment damage If any abnormal situation occurs during this startup procedure open the input circuit breaker and investigate the problem Call Liebert Services if help is required 4 When the Module DC Bus voltage is at 100 you can manually close the module battery disconnect MBD circuit breaker external to the UPS The Battery block in the Monitor Mimic Display indicates the battery voltage and charge current NOTE The battery charge current may increase quickly but then should slowly decrease If the system is recovering from a battery shutdown or an input power failure the UPS rectifier will be recharging the battery Recharge current can be more than 100 Amps The maximum allowable recharge current for your unit will depend on the kVA rat
47. d with a UPS Start Up 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 Liebert requires a mandatory installation inspection for all batteries not installed by Liebert 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 LGS has a variety of available maintenance agree ments 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 Liebert recommends two preventive maintenance visits per year for the UPS The first can be con ducted 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 changing air filters etc that can be performed by customer personnel Battery Service Agreements The same flexible Signature Program can also be applied to con
48. e High Limit 1 to 15 default 5 Inlet Air Temp Warning Inlet Air Temp Warning 30 C to 40 C default 35 C NOTE Temperature will display in both Celsius and Fahrenheit Figure 12 Adjustable setpoints parameters Manual fer Bypass Voltage Low Limit D Phase A fo Manual xfer Bypass Voltage High Limit 0 Phase B 0 Phase C 2 0 Save Cancel Delay seconds D Inlet Air Temp Warning lo c 32 0 F Save Cancel Save Cancel Battery Management These battery settings can be changed from the touchscreen Press the box to the left of each parame ter to bring a popup window that will allow the parameter to be changed Battery Equalize Equalize Voltage Vpc 2 30 to 2 40 default 2 3 Equalize Time hours 0 to 200hours default 0 NOTE Battery Equalize must be enabled by service to be functional If Battery Equalize is disabled the feature will not be available and the menu item will not be displayed 12 Operation Battery Test Auto Test Enable Disable default disabled Test Cycle weeks 1 to 26 default 13 weeks Time of day hh mm Set Hour and Minute sets the start time of the automatic battery test Start Date mm dd yyyyy Set Month Day and Year Test Duration minutes Automatic 0 5 minute to 30 of full load Operating Time default automatic Minimum Battery Voltage lead acid only 1 75VPC to 1 95VPC default 1 75VPC this is the minimum voltage the
49. e 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 set tings as well as the module input rectifier feeder breaker trip settings to ensure that they are cor rect 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 NOTE 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 NOTE While Liebert can provide typical guidelines the responsibility for the proper breaker trip settings outside the Liebert manufactured UPS equipment resides with the owner Contact Liebert Services at 1 800 LIEBERT for further details 38 SPECIFICATIONS 4 0 SPECIFICATIONS 4 1 Battery Operation The separate battery manufacturer s manual available on the manufacturer s Web site provides the necessary information for the installation
50. e eee dition is Check the status of Module Battery Disconnect MBD Open MBD If it is open the alarm is normal no longer present the alarm and any control activity tied to the alarm reverts to normal If the Module Battery Disconnect is closed contact your factory authorized service provider 58 UPS Alarm and Status Messages Table 7 Liebert NXL alarm and status messages continued Event Message Multiple Fan Fail Event Definition This summary event is active when more than one fan has failed Recommended Action Press SILENCE to silence the audible alarm Press RESET to clear the alarm If the alarm will not clear contact your factory authorized service provider On Gen Active The UPS input source is generator An external signal is being used to inform the UPS when the power source is generator rather than utility and the signal is active This status message is self clearing When the condition is no longer present the message and any control activity tied to the status event reverts to normal Under normal conditions no user action is required If the UPS is not actually on generator and this message is active contact your factory authorized service provider Outlet Ovtemp Limit The difference between the inlet air temperature and the outlet air temperature is too great This alarm means excessive heat is being generated internally resulting in
51. ed load percentage is less than 100 and the alarm is still active contact your factory authorized service provider Inv Overload Ph C An overload condition is active on C phase C phase load condition exceeds 105 A countdown timer is displayed on the One Line Display in response to this alarm and indicates the time remaining until a transfer to bypass occurs The length of time remaining until transfer is inversely proportional to the severity of the overload This alarm is self clearing When the condition is no longer present the alarm and any control activity tied to the alarm reverts to normal Press SILENCE to silence the audible alarm Check the Module Output Meter and note the C phase load percentage If possible reduce C phase loading If the steady state load remains above 105 allow the UPS to transfer to bypass and contact your factory authorized service provider If the displayed load percentage is less than 100 and the alarm is still active contact your factory authorized service provider Inv Ovid Exceeded This message is displayed in response to an overload on one or more output phases When an overload occurs the controls display a countdown timer that displays the time remaining until a transfer to bypass occurs The length of the timer is inversely proportional to the amplitude of the overload When the timer reaches zero the UPS transfers to bypass and populates the Active Event Wi
52. eleased electrolyte is harmful to the skin and eyes It is toxic A WARNING Risk of electrical 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 e 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 mainte nance Lead acid batteries can present a risk of fire because they generate hydrogen gas In addition the electrical connections must be protected against accidental short circuits which can cause 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 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 ever need to be r
53. ending on the severity of the overload the possibility exists that CB3 could trip if the overload exceeds the breaker rating Investigate the overload condition If the Module Output Meter does not indicate an overload condition perform the previous steps and contact your factory authorized service provider Byp Overload PhB The critical load is greater than 110 while the UPS is on bypass The controls may shut the unit down if the overload condition does not clear within the allotted time Allotted time is variable and is inversely proportional to the amplitude of the overload i e the greater the amplitude of the overload the less time the unit continues to support the load This alarm is self clearing When the condition is no longer present the alarm and any control activity tied to the alarm reverts to normal Press SILENCE to silence the audible alarm Observe the calculated load percentage on B phase displayed on the Module Output Meter If the B phase steady state load percentage exceeds 110 perform the following If Maintenance Bypass is available follow Standard Operating Procedures to transfer the load to Maintenance Bypass If Maintenance Bypass is not available but the system has an Internal Bypass Breaker CB3 on the One Line Display close CB3 Note that depending on the severity of the overload the possibility exists that CB3 could trip if the overload exceeds the breaker rating Inve
54. ending on the severity of the overload the possibility exists that CB3 could trip if the overload exceeds the breaker rating Investigate the overload condition If the Module Output Meter does not indicate an overload condition perform the previous steps and contact your factory authorized service provider Bypass Breaker CB3 Open Fail The bypass circuit breaker has failed to respond to an open signal Bypass Line Fail The bypass source is not present Bypass Not Avail This summary event indicates a problem with the detected bypass voltage If bypass is not available transfers to bypass are disabled This alarm is self clearing When the condition is no longer present the alarm and any control activity tied to the alarm reverts to normal Press SILENCE to silence the audible alarm Observe the One Line Display The bypass power line feeding the static switch is green when bypass power is within normal operating range If the line feeding the static switch is orange gray or black bypass voltage is out of tolerance Also check the bypass voltage readings on the Bypass Meter When the bypass returns to normal this alarm clears automatically If all indications checked above are normal and the alarm is still present contact your factory authorized service provider If there is a problem indicated with the bypass voltage investigate and resolve the issue Examples of conditions that could cause this al
55. epositioned 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 mainte nance of electrolyte levels is not required visual inspections and checks of battery voltage and connec tion resistance should be made NOTICE Risk of 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 brittle 35 Maintenance Because individual battery characteristics are not identical and may change over time the UPS mod ule is equipped with circuitry to equalize battery cell voltages This circuit increases charging voltage to maintain flooded type battery cells at full capacity 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 i
56. equirements of your application This option is required to com plete the UPS system Battery Cabinets Valve regulated lead acid VRLA sealed batteries are available in match ing 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 pro vide the additional run time This option is required to complete the UPS system Module Battery Disconnect The UPS system utilizes a separate Module Battery Disconnect for remotely located batteries A 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 Disconnect has an undervoltage release mechanism designed to ensure that dur ing any shutdown or failure mode all battery potential is removed from the UPS system This option is required to complete the UPS system Input Current Distortion Filter This filter reduces input current reflected harmonic distor tion to less than 7 reflected THD at full load The filter is factory installed in the UPS This fil ter also improves the input power factor to better than 0 92 lagging at full load Two Breaker Maintenance Bypass This switchboard provides make before break mainte nance bypass It includes Maintenance Bypass Breaker MBB and Maintenance Isolation Breaker MIB Introduction Load Bus Syn
57. er the global leader in enabling business critical Technical Support Service continuity ensures network resiliency and adaptability through _ Web Site a family of technologies including Liebert power and cooling www liebert com Monitoring technologies that protect and support business critical systems Liebert solutions employ an adaptive architecture that responds jg ig monitoring emersonnetworkpower com to changes in criticality density and capacity Enterprises benefit Outside the US 614 841 6755 from greater IT system availability operational flexibility and Single Phase UPS reduced capital equipment and operating costs 800 222 5877 upstech emersonnetworkpower com Outside the US 614 841 6755 Three Phase UPS 800 543 2378 powertech emersonnetworkpower com 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 Leonardo Da Vinci 8 Zona Industriale Tognana 35028 Piove Di Sacco PD Italy wt za i R 39 049 9719111 ile every precaution has been taken to ensure the accuracy and completeness of this literature Liebert Corporation assumes no Fax 39 049 5841 257 responsibility and disclaims all liability for damages resulting from use of Asia this information or for any errors or omissions 7 F Dah Sing Financial Centre 2008 Liebert Corporation 3 108 Gloucester Road Wanchai All rights reserved th
58. er and press the pad The load will be transferred to bypass and the battery MBD input and output circuit breakers will be opened tripped Refer to 2 5 Shutdown Procedures Figure 28 Emergency modules off 22 Operation 2 3 6 Remote Emergency Power Off The Remote Emergency Power Off REPO mode will transfer the critical load to the bypass line and remove power from all UPS module components except the controls bypass circuit breaker and the static switch The Remote Emergency Power Off control is a 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 all UPS circuit breakers are opened including the bypass circuit breaker 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 Shutdown Procedures Figure 29 Remote emergency power off i 2 4 i Input Manual Procedures The Liebert NXL UPS is designed to function while unattended by an operator Many important func tions are handled automatically by the system control logic as explained in 2 6 Automatic Opera tions Other procedures must be performed manually Man
59. erator must press OK Figure 17 System shutdown popup AN Pressing Ok will shut off the UPS output completely Load Drop will occur ok Cancel 15 Operation 2 2 6 Transfer Menu This menu permits switching between UPS and Bypass mode graph in the multipurpose window shows if the UPS is in synch with the bypass If the UPS and bypass are in synch pressing Bypass will switch the UPS to Bypass mode Pressing UPS will switch back to Normal Inverter Mode see Figure 18 Figure 18 Transfer retransfer commands BYPASS A B e EE De o o Freq 0 0Hz INPUT A B LL 0 o I o 0 Freq 0 0Hz BATTERY 1 OF 4 Voltage Disable Temp Disable Charge 0 Legend Piet MED Inlet Air Temp 0 C RESET SILENCE Transfer Retransfer 30 o 30 In Sync UPS BYPASS CONFIG STATUS REPORTS STARTUP SHUTDOWN TRANSFER BATT MGT METERING HELP 16 Operation 2 2 7 Battery Management Menu This menu permits configuring battery settings Time Remaining Graph Displays the time remaining graph in the multipurpose window plot the battery voltage against elapsed time during a Battery Discharge Cycle see Figure 19 Figure 19 Time remaining display BYPASS A B C e L L o o ov my Freq 0 0Hz BFB INPUT A B C ey L L o o ov I o o DA cB1 Freq 0 0Hz Legend Inlet Air Temp 22 C RESET SILENCE Low Battery warning 460 1
60. ermanently You must download the data Are you sure you want to clear the log Yes Cancel Metering This button will place the metering tables in the multipurpose window Help This button will display the help menu Reset This button will reset any non active latched events Silence This button will silence the audible alarm 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 Lie bert NXL 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 at your installation Load on Bypass Load on Bypass with the UPS not available is shown in Figure 23 The UPS system could be in this mode of operation during either initial startup or UPS system shutdown and isolation for mainte nance NOTICE Risk of equipment damage When the critical load is being supplied power from the bypass line it is exposed to utility failure and fluctuations Figure 23 Load on bypass UPS not available 19 Operation 2 3 2 OK to Transfer The OK to Transfer status message will be displayed when the bypass line and UPS output power are both available their voltage frequency and phase synchronization are
61. ery Maintenance A WARNING Risk of electrical shock and high short circuit current Can cause equipment damage personal injury and death These maintenance procedures will expose hazardous live parts Refer servicing to properly trained and qualified personnel working in accordance with applicable regulations as well as with manufacturers 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 34 Maintenance 3 4 1 Battery Safety Precautions Servicing of batteries should be performed or supervised by personnel knowledgeable of batteries and the required precautions Keep unauthorized personnel away from batteries When replacing batteries use the same number and type of batteries 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 R
62. ess SILENCE to silence the audible alarm Examine the One Line Display The Rectifier input line feeding the Input Breaker should be green If not investigate source power to the UPS If input power is good and this alarm is active contact your factory authorized service provider Internal Comm Error This is a summary event caused by an interruption in communication between the controls and a device on the Controller Area Network CAN The Internal Communication Error event indicates a loss of communications between the controls and an external device The Internal Communication Error is displayed when the controls detect a loss of communication to a device on the Controller Area Network CAN An infrequent occurrence that resets immediately is probably not serious Press SILENCE to silence the audible alarm Press RESET to clear the alarm If the alarm cannot be reset or if the alarm condition returns contact your factory authorized service provider Inv Overload Ph A An overload condition is active on A phase A phase load condition exceeds 105 A countdown timer is displayed on the One Line Display in response to this alarm and indicates the time remaining until a transfer to bypass occurs The length of time remaining until transfer is directly proportional to the severity of the overload This alarm is self clearing When the condition is no longer present the alarm and any co
63. essage it means the contact channel is set to default but the default message was erased If the display shows Case 2 the user programmed event is active and the displayed text is customer defined If the display shows Case 3 the contact is active but was not pre programmed default condition If the display shows Case 4 the controls force the Rectifier into Reduced Input Current Limit operation this limits the amount of current available to charge the battery typically during generator operation This alarm message is self clearing When the condition is no longer present the message and any control activity tied to the alarm will revert to normal Check the wires landed on Input Contact Isolator X If the signal is not active or no wires are present contact your factory authorized service provider Input Contact Interface 1 Communication Failure Input Contact Interface 1 has failed to communicate in a timely fashon Input Contact Interface 2 Communication Failure Input Contact Interface 2 has failed to communicate in a timely fashon Input Current Imbal The detected input currents are not balanced This latching alarm indicates a potential problem in the input filter The controls automatically open the filter contactor in response to this condition The filter contactor must be manually closed once it opens in response to this alarm Press SILENCE to silence
64. f 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 Table 1 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 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 an lithium logic memory 10 years 87 600 hours 8 to 9 years Battery storage Lead acid wet cell user selection 10 to 20 years 1 to 2 years before end of life 5 years 3 to 4 years Valve regulated lead acid VRLA 10 years 6 to 8 years 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 ser vices periodic inspection of these components is part of this service as well as recommending compo nent replacement intervals to customers to avoid unanticipated interruptions in critical load operations Batt
65. fer to UPS without first contacting your factory authorized service provider Verify the bypass line is green If it is not contact your factory authorized service provider immediately and prepare to shut down the load If the bypass line is green press Transfer Bypass to transfer the load to bypass If there is a CB3 present on the One Line Display close CB3 If CB3 is not present and external Maintenance Bypass is available close the MBB to place the load on Maintenance Bypass If both CB3 and Maintenance Bypass are present first close CB3 then close the external MBB If CB3 or external Maintenance Bypass is not available shut down the UPS by pressing Shutdown UPS and contact your factory authorized service provider 51 UPS Alarm and Status Messages Table 7 Liebert NXL alarm and status messages continued Event Message Excess Auto Rexfers Event Definition The UPS has re transferred too many times and is now locked on bypass The UPS attempts to perform an automatic transfer back to Inverter if the reason for the transfer to bypass is determined by the controls to be automatically recoverable for example a temporary overload The number of times the UPS attempts to recover from an automatic transfer to bypass is limited When the number of transfers exceeds the number allowable default is 5 transfers per hour the UPS remains on bypass and display this message An example
66. g on the One Line Display is higher than normal contact your factory authorized service provider 52 UPS Alarm and Status Messages Table 7 Liebert NXL alarm and status messages continued Event Message Inp Phase Rotation Event Definition The correct input phase rotation should be clockwise or A B C This alarm indicates the sensed input phase rotation is counter clockwise If this alarm occurs on an operational unit it typically indicates upstream work was performed input side and the input wiring was connected incorrectly This alarm is self clearing When the condition is no longer present the alarm and any control activity tied to the alarm reverts to normal Recommended Action Press SILENCE to silence the audible alarm Verify correct phase rotation at the input If the phase rotation is correct contact your factory authorized service provider Input Contact XY The displayed text for this alarm is dependent on settings In response to this alarm the user may see 1 of 4 possible messages 1 No message but the help icon lowercase i is present 2 A custom message programmed by the user 3 Input Contact XY if the contact is unconfigured 4 Reduced Rect ILimit if the contact is programmed as Pre assigned If this event is active an external signal is wired into Channel Y of Input Contact Isolator X If the display shows Case 1 above blank m
67. ground In case of fire involving electrical equipment use only carbon dioxide fire extinguishers or others approved for use in fighting electrical fires A WARNING Risk of electrical 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 Liebert 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 not familiar with the circuitry 31 Maintenance 3 2 3 2 1 3 3 Liebert Services Startup UPS maintenance battery maintenance and training programs are available for the Liebert NXL UPS through your Liebert sales representative Professional Startup UPS Startup Liebert s Customer Engineers perform a thorough non powered inspection of the units and will then conduct a complete electrical checkout The battery installation is also inspected and placed on an initialization charge to ensure cell equalization Customer Operation training will be conducted during battery charge time Load bank testing and full site acceptance testing are additional services that can be performed dur ing a UPS startup One preventive maintenance service call can be added to the initial UPS startup agreement Battery Installation Startup When purchase
68. h the following ratings a Subject to maximum kVA rating b 0 9 lag to Nom c at 0 95 Lead b Subject to maximum kW rating c Subject to maximum kW rating d at 0 9 Lead d Subject to 12 5 kW derate or same rating and 10 C temp derate e at 0 8 Lead e Subject to 25 kW derate or 12 5 kW derate and 10 C Temp Derate Voltage Displacement el 120 1 el with 100 unbalanced load Compliance to FCC Class A Overload Conditions FL Standard 110 for 60 minutes 125 for 10 minutes 150 for 1 minute 40 SPECIFICATIONS Table 6 Electrical specifications continued Liebert NXL Model Size 250 300 400 System Parameter UPS Efficiency AC AC 100 Load 93 9 94 94 2 UPS Efficiency AC AC 50 Load 93 2 93 3 93 4 Physical Parameters amp Standards in mm Width 71 8 1823 78 5 1993 78 5 1993 Depth 33 5 850 33 5 850 39 4 1000 Height 76 8 1950 Weight Ib kg approx 4165 1889 4890 2218 5450 2472 Color Front Door Opening for serviceability Charcoal ZP 0420 More than 180 Degree of Protection for UPS Enclosure IP 20 with and without front door open Standards amp Conformities UL 1778 CSA 22 2 107 3 FCC Part 15 Class A IEC62040 2 Level 4 Criteria A EN61000 4 3 Level 3 Criteria A EN61000 4 6 Level 4 Criteria A EN61000 2 2 Criteria A EN61000 4 4 Level 4 Criteria
69. he 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 NXL protects the critical load by instantaneously channeling battery power to the inverter which continues supporting the critical load without interruption When utility power returns and is within acceptable limits the Liebert NXL automatically shifts back 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 Opera tion Options A number of options are available from Liebert for your UPS system Some options are not available for all ratings Described below are the most frequently provided options The first three battery items are required to complete the UPS system The remaining options provide improved sys tem performance or convenience Other options are available Contact your Liebert sales representa tive for more information Battery and Racks The batteries provide power in the event of a power outage The Liebert NXL UPS can use a variety of battery types provided the battery plant is designed for the UPS DC voltage range and the load r
70. he Battery Box If the Common Battery Disconnect and or the individual battery cabinet or string reporting the over temperature condition is tripped check the following settings Press User Settings Battery Management Battery Temperature to check the current Battery Temperature Setpoints If none of the Battery Boxes on the One Line Display exhibit a temperature in excess of the temperature setpoint in the user settings contact your factory authorized service provider If the overtemperature limit is being reported correctly investigate potential causes such as faulty air conditioning or air flow blockage and resolve Otherwise contact your factory authorized service provider One or more of the Battery Temperature Sensors is reporting a temperature above the warning setpoint There are two user adjustable Battery Temperature Setpoints Battery Over Press SILENCE to silence the audible alarm Observe the One Line Display To identify which battery cabinet is reporting the temperature condition press the Battery Box on the One Line Display to cycle through each battery compartment or string The temperature display is located under the voltage reading in the Battery Box Press User Settings Battery Management Battery Temperature to check the current Battery Batt Mgt Battery Test This status message is self clearing When the condition is no longer present the
71. ifications and design life at temperatures up to 104 F 40 C and can be slightly derated for operation at even higher temperatures or higher alti tudes However performance and longevity will be optimized when the UPS is operated at the same temperature as the batteries Contact your local Liebert sales representative or call 1 800 LIEBERT for further details Keep connections tight Tighten all connections at installation and at least annually thereaf ter See torque requirements Table 4 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 condi tions may be more quickly recognized Know what typical meter readings are and where adjust able 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 battery module as directed by the battery manufacturer A periodic walk through inspection of the UPS and battery rooms is advised to check for visible and audible indications of problems Log the inspection metered parameter indications and any discrep ancies Air Filters The air fil
72. ing and your factory set battery recharge current limit 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 Figure 30 Startup commands BYPASS BFB ry MODULE INPUT A T DC BUS NI OUTPUT cB2 BATTERY 1 OF 4 Woltage Disable Temp Disable Legend prsi MED Inlet Air Temp 0 C RESET SILENCE INPUT MODULE OUTPUT A B C A B C EL 0 0 o Y PEE 0 0 OD Y Amps 0 0 DA L N D D o Y Freq 0 0 Hz Amps 0 0 0 A BYPASS KYA o 0 0 A B c KW o 0 0 pep 0 0 o Y PF 0 0 0 0 0 0 Freq 0 0 Hz KVA KW 07 0 TT Freq 0 0 Hz Volts D y Rexfer Timeout 00 00 Amps Float A 30 o 20 eel el ae el lp aa JR M Is In Sync anual Start 7 Lieberte NXL 300 KVA Device Control Copyright 2006 2007 CONFIG STATUS REPORTS STARTUP SHUTDOWN TRANSFER BATT MGT METERING HELP 25 Operation 2 4 2 2 4 3 Figure Load Transfer Procedures Changing the load from the UPS system to the UPS bypass is called a transfer Changing the load from UPS bypass to the UPS system is called a retransfer Note that the UPS system control logic can initiate automatic load transfers and retransfers Refer to 2 6 Automatic
73. ive alarms or faults before attempting to clear this fault Press RESET to clear the fault If the Event Window is clear press Transfer UPS to transfer the load back to Inverter If the UPS button is grayed out or pressing the UPS button does not transfer the unit back to Inverter or ifthe UPS immediately transfers back to bypass contact your factory authorized service provider This is a summary event that indicates a fuse has opened There are several fuses that can cause this fault Press SILENCE to silence the audible alarm Check the One Line Display and other indicators to Fuse Fail The Fuse Failure event is caused by one or more determine the state of the unit and take appropriate fuses reporting a failed status The UPS may or action may not transfer to bypass as a result of the failed Contact your factory authorized service provider fuse Press SILENCE to silence the audible alarm Check the Inlet Air Temperature on the One Line Display and verify the reading is accurate i e is the The air flowing into the UPS is too warm room temperature warmer than normal Inlet Ovtemp This alarm is self clearing When the condition is If the room temperature is warmer than normal no longer present the alarm and any control activity tied to the alarm reverts to normal investigate and resolve the issue If the room temperature is normal and the Inlet Air Temp readin
74. ized service no longer present the alarm and any control representative activity tied to the alarm reverts to normal Load on Bypass The load is being supplied by bypass None Load on Maint Byp The load is on Maintenance Bypass None Low Batt Capacity One or more battery circuit breakers are open This alarm applies if the system includes more than one battery circuit breaker and at least one is closed but one or more are open This alarm is self clearing When the condition is no longer present the alarm and any control activity tied to the alarm reverts to normal Press SILENCE to silence the audible alarm To clear this alarm verify all battery breakers are closed Investigate any open breakers The Battery has reached End of Discharge EOD Press SILENCE to silence the audible alarm Once power is restored attempt a normal restart of Low Batt There is no longer enough energy left in the the UPS Shutdown battery to run the Inverter with the current load If the restart tailescontaci Palais ae If bypass is available the UPS attempts to i Je eee ones y P service provider transfer the load to bypass at EOD Check to see if bypass is available by observing the The battery is nearly depleted and the unit shuts One Line Display Acceptable bypass voltage is down very soon indicated by a green power line feeding the Static The Low Battery Warning setpoint is adjustable Bypass Switch
75. llow menu prompted software 2 1 Features The Liebert NXL 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 status reports and history files Adjustment programmable parameters access limited by security access function Adjustment output voltage before performing a manual load transfer The touchscreen is a white background display with multicolor text The display turns on automati cally but after 15 minutes of inactivity the backlight will go out and the display will appear very dim Touching the screen will reactivate the backlight the backlight will again be active for 15 minutes If any screen other than the mimic screen is accessed that screen will be displayed for 5 minutes with out any interaction If there is no activity for 5 minutes the display will revert to the basic mimic screen Figure 2 Main component locations HMI SCREEN EPO BUTTON INTELLISLOT HOUSINGS INPUT OUTPUT CONNECTIONS BEHIND INNER DOOR EXTERNAL INTERFACE BOARD eee ee EN 5 MOTTA IM MODULE OUTPUT BACKFEED MAIN INPUT CIRCUIT BREAKER BREAKER CIRCUIT BREAKER CB2 BFB CB1 Operation Figure 3 Main Display Screen typical BYPASS BFB ry MODULE INPUT SS DC BUS T ry OUTPUT SJT B1 cB2 Mimic
76. nal Maintenance Bypass Breaker MBB Liebert does not recommend the user or operator attempt this without first speaking with an authorized service associate from Liebert Maintenance Bypass Breaker MBB Open The maintenance bypass breaker indicates that it is in the open position Man Rexfer Inhibit This summary event means the conditions required to perform a manual transfer to Inverter online are not met Inverter must be in sync with bypass This status message is self clearing When the condition is no longer present the message and any control activity tied to the status event reverts to normal The condition clears from the Active Event Window when manual re transfers are enabled A possible reason for this condition is an unstable generator If the generator frequency is not stable or not at 60 Hz the Inverter may have difficulty maintaining or acquiring synchronization with the bypass source To check the synchronization of the Inverter to bypass click Transfer and observe the synchroscope A non sync condition is indicated by a varying phase angle error rather than a stable 0 degree indication If the unit is not on generator and the bypass voltage otherwise appears normal contact your factory authorized service provider 57 UPS Alarm and Status Messages Table 7 Liebert NXL alarm and status messages continued Event Message Manual Xfer Inhibit E
77. ndividual battery cells are sealed valve regulated and require only minimal mainte nance 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 oper ating 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 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 2 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 Visually inspect wiring for dis colored or cracked insulation Clean and or retighten as required Refer to torque specifications in Table 4 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 8 shows battery retorque values Table 3 Battery retorque values Battery
78. ndow with this alarm This fault is non latching When the underlying condition is no longer present this fault and any control activity tied directly to this fault reverts to normal Press SILENCE to silence the audible alarm Observe the load percentages for each phase on the Module Output Meter If the load is less than 100 attempt to transfer back to Inverter by pressing Transfer UPS If the transfer is successful investigate the reason for the overload and take appropriate action If the transfer is unsuccessful contact your factory authorized service provider Inverter Fault This summary event indicates a potentially serious problem in the Inverter The controls react to an Inverter fault in different ways depending on the root event that caused the fault If bypass is available the controls transfer to static bypass A restart may or may not be possible Press SILENCE to silence the audible alarm Check the One Line Display to determine the state of the UPS If both the Rectifier and Inverter are shut off press RESET to attempt to clear any latched alarms or faults Attempt a restart by pressing Startup Manual Start and follow the prompts to place the UPS back in service If the startup fails contact your factory authorized service provider If the Rectifier and Inverter appear to be running press RESET to attempt to clear any latched alarms or faults then
79. ng an invalid temperature The controls ignore temperatures from a failed sensor Recommended Action Under normal circumstances none If this message is active and Service Code is not loaded contact your factory authorized service provider Press SILENCE to silence the audible alarm Press RESET to clear the alarm If the alarm cannot be reset or if the alarm condition returns contact your factory authorized service provider Xfer to Byp Failed An event such as an Inverter fault caused an attempted automatic transfer to bypass and the transfer failed The controls detect the Static Bypass Switch BPSS failed to assume the load and the Inverter was off Press SILENCE to silence the audible alarm Check the Event Log by pressing Status Reports Event Log to investigate why the UPS tried to transfer to bypass and why the BPSS failed If CB3 is available as displayed on the One Line Display close CB3 to restore power to the load Press RESET to attempt to clear any latched alarms or faults If conditions appear normal attempt to restart the UPS by pressing Startup Manual Start and follow the prompts Contact your factory authorized service provider 62 UPS Alarm and Status Messages NOTES 63 UPS Alarm and Status Messages 64 Ensuring The High Availability Of Mission Critical Data And Applications Emerson Network Pow
80. nly and observe the One Line color Green indicates good power present orange means power is present but outside nominal range and gray means power is not present If the load is off and the input voltage is ok attempt to restart the UPS by pressing Startup Manual Start and follow the prompts If the Input Meter indicates input or bypass is not available investigate and resolve the power problem If the load is on bypass and all alarms are reset press Transfer UPS to attempt to transfer back to Inverter If the issue cannot be resolved contact your factory authorized service provider 59 UPS Alarm and Status Messages Table 7 Liebert NXL alarm and status messages continued Event Message Rectifier Fault Event Definition This summary event indicates a potentially serious condition in the Rectifier circuit The controls respond to this by turning off the Rectifier opening the input filter contactor and placing the UPS on battery operation This fault is non latching When the underlying condition is no longer present this fault and any control activity tied directly to this fault reverts to normal Recommended Action Observe the One Line Display and the Active Event Window for current UPS condition On Battery Observe the color of the Bypass Line on the One Line Display If green bypass is available This is significant because if the batteries fail the UPS
81. nnect device indicates that it is Q1 Open in the open position Input Disconnect The externally mounted input isolator indicates Q11 Open that it is in the open position Input Filter Cycle The Input Filter Disconnect is locked open The Input Filter Disconnect Cycle counter has exceeded the setpoint The Input Filter Disconnect opens automatically as determined by the disconnect settings or because of an unusual condition An example of a setting would be to automatically open the filter disconnect under light load conditions to improve the input power factor An example of an unusual condition would be unbalanced currents on the input possibly because of a suspect component in the filter itself Press SILENCE to silence the audible alarm Attempt to manually close the disconnect by pressing Startup Device Control Close Trap If the condition which caused the filter disconnect to lock open is still present it re opens If the disconnect cannot be manually closed or the alarm cannot be cleared contact your factory authorized service provider Input Not Avail This summary alarm means there is a problem with input power It is not acceptable to the Rectifier If the unit is running normally when this event occurs the UPS goes to battery This alarm is self clearing When the condition is no longer present the alarm and any control activity tied to the alarm reverts to normal Pr
82. nsfer to the UPS after an overload has been cleared Initiates an automatic transfer to bypass and emergency module shutdown when specified UPS faults occur 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 32 Note that the time scale is not linear For high current demands of short duration momentary overloads the critical load is supplied simul taneously 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 28 Operation Figure 32 Current versus time curves of overload capacity 10 min 1 min 110 125 150 2 6 2 Automatic Transfers to Bypass Overload Condition The UPS system will initiate an automatic load transfer to the bypass line if an overload condition exceeds the current versus time curve of overload capacity or if specified UPS system faults occur Load On Bypass is illustrated in Figure 24 The Overload Transfer and Output Undervoltage alarm messages will initiate an automatic transfer to bypass and the Load On Bypass message will be displayed The active event window will display the Automatic Transfer to Bypass message
83. ntact your factory authorized service provider EMO Shutdown An Emergency Module Off EMO command has been detected The EMO signal means the front panel EMO button was pressed A Remote EMO would display the REMO Shutdown alarm In response to an EMO the UPS transfers to Bypass and shuts off Press SILENCE to silence the audible alarm Resolve the issue that precipitated the EMO For safety the UPS latches an EPO event To clear the latch press the EMO Reset pushbutton on the External Interface Board EIB Verify the EMO is cleared by pressing RESET and observing that the EPO alarm in the Active Event Window is gone Restart the UPS by pressing Startup Manual Start and follow the prompts 49 UPS Alarm and Status Messages Table 7 Liebert NXL alarm and status messages continued Event Message EPO Shutdown Event Definition The UPS shuts down in response to an active Emergency Power Off EPO command Recommended Action Press SILENCE to silence the audible alarm Resolve the issue that precipitated the EPO For safety the UPS latches an EPO event There are two ways to clear the latch 1 Press the EPO Reset pushbutton on the External Interface Board EIB 2 From HMI front panel display press OK button when Press OK to Reset EPO Latched signal message is displayed in a dialog box Verify the EPO is cleared by observing the EPO al
84. ntrol activity tied to the alarm reverts to normal Press SILENCE to silence the audible alarm Check the Module Output Meter and note the A phase load percentage If possible reduce A phase loading If the steady state load remains above 105 allow the UPS to transfer to bypass and contact your factory authorized service provider If the displayed load percentage is less than 100 and the alarm is still active contact your factory authorized service provider 54 UPS Alarm and Status Messages Table 7 Liebert NXL alarm and status messages continued Event Message Inv Overload Ph B Event Definition An overload condition is active on B phase B phase load condition exceeds 105 A countdown timer is displayed on the One Line Display in response to this alarm and indicates the time remaining until a transfer to bypass occurs The length of time remaining until transfer is directly proportional to the severity of the overload This alarm is self clearing When the condition is no longer present the alarm and any control activity tied to the alarm reverts to normal Recommended Action Press SILENCE to silence the audible alarm Check the Module Output Meter and note the B phase load percentage If possible reduce B phase loading If the steady state load remains above 105 allow the UPS to transfer to bypass and contact your factory authorized service provider If the display
85. o be configured with a delay to correct and the value exceeds the setpoint raise prevent nuisance alarms due to cycling loads red the alarm or reduce the load The alarm is self clearing Once the load level E 3 decreases to less than 95 of the level setting Contact your factory authorized service provider the alarm clears The user adjustable maximum load alarm threshold was exceeded This is a notification Press SILENCE to silence the audible alarm only type alarm meaning the UPS takes no Check the kW load displayed for C phase acion other than sounding an au alarm To check the setpoint for the alarm press Config based on this setpoint The setting allows the user User Settings Adjustable Setpoints Max Load to monitor the load status of the UPS 95 J P 3 Alarm Max Load For example if the current load on Phase C is Compare the setpoint to the displayed load O i i O Serre rd er Ve ae gee eee percentage If the load percentage displayed is Th alarm may also be confidured witha dela to correct and the value exceeds the setpoint raise may 9 y the setpoint to clear the alarm or reduce the load prevent nuisance alarms due to cycling loads below the setpoint The alarm is self clearing Once the load level i gt A decreases to less than 95 of the level setting Contact your factory authorized service provider the alarm clears Press SILENCE to silence the audible alarm Us Rane ce
86. onitor mimic display example Utility fall 0 eee nas 7 Monitor mimic display example Load on bypass UPS On 0 0 cece 8 Monitor mimic display example Load on bypass UPS module off o o o ooooooo o 8 Menu tree rane Aiea a Siete Ate aaa ane Life sos Seeds a ee 9 R tins Para meter ii A pw BM a spakene bree dit 10 System Settings parameters 1 0 eee eee eee teen nes 11 Adjustable setpoints parameters 12 Battery Management Parameters 00 ccc eee cece eee e eee vann 13 Typical Event Management Parameters eee eee eens 14 Shutdown menu ve ashi ge ae RGA eee He 5 a teite de kalas Ghana 15 UPS shutdown popup A ee Boh AA ed ne Bb ok ee ade 15 System shutdown popup 2 ccc eee eee eee enn a a aa naa van 15 Transfer retransfer commander 16 Time remaining display 17 Battery ey cle MORO A A Gr TTS dad 18 Battery cycle monitor UM 18 Battery cycle monitor clear log 19 Load on bypass UPS not available ooo 19 Load on bypass UPS available vr v rava cece ren n ne ees 20 Load on UPS bypass available een teen rav vr 20 Input power fail load on battery 21 Load on UPS battery not available 22 Emergency modules of pund nede eee ee Pal ke EG Meer bi der de eget la 22 Remote emergency power AL 23 Startup commands resa ask s dada ses da UR AP ad DA lal Ud db dah atl clado dla ok 25 UPS with two breaker bypass Cabinet 26 Current
87. 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 man ual 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 527 to 561VDC Maximum equalize voltage is 585VDC Battery voltage at end of discharge is 386VDC at the UPS ter minals 389VDC at the battery The number of battery cells required will range from 236 to 244 depending on the application 4 2 Environmental Conditions Table 5 Environmental specifications Parameter Specification The UPS is housed in a NEMA 1 enclosure The enclosure is designed for indoor Enclosure use only and is not to be subjected to falling objects or precipitation Recommended Operating Temperature F C 77 25 ambient Maximum Operating Temperature F C 104 40 ambient design temperature without derating see Notes 2 and 3 Minimum Operating 0 C Temperature F C Storage Temperature F C 13 to 158 25 to 70 Typical Battery Average annual temperature must not exceed 80 F 27 C Peak temperature Temperature Requirements must not exceed 109 F
88. or signs of leaking battery acid or excessively corroded battery terminals If there are no visible signs of defective batteries press RESET to try and clear the alarm Close any open breakers one at a time pressing RESET after each one to see which string is causing the alarm The string reporting the fault when online will not allow the alarm to reset Once the location is identified or if the battery string tests are inconclusive contact your factory authorized service provider 44 UPS Alarm and Status Messages Table 7 Liebert NXL alarm and status messages continued Event Message Batt Ovtemp Limit Event Definition One or more of the Battery Temperature Sensors is reporting a temperature above the limit setpoint There are two user adjustable Battery Temperature Setpoints Battery Over Temperature Warning and Battery Overtemperature Limit The temperature in one or more battery compartments has risen above the limit setpoint Depending on user settings the controls may trip the battery breaker associated with the over temperature condition Recommended Action Press SILENCE to silence the audible alarm Observe the One Line Display To identify which battery cabinet is reporting the temperature condition press the Battery Box on the One Line Display to cycle through each battery compartment or string The temperature display is located under the voltage reading in t
89. peration NOTICE Risk of equipment damage The UPS system must be on internal bypass before performing the following procedures and operating MIB or MBB or damage to the UPS may occur and the critical load may be lost Maintenance Bypass Load Transfers lf Load is on UPS Bypass 1 Ifthe maintenance bypass cabinet or switchboard has an optional two key interlock system press the button on the maintenance bypass cabinet to remove the key from the solenoid 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 insert the key into the lock for the Maintenance Bypass Breaker MBB to enable it to be closed 3 Close the Maintenance Bypass Breaker MBB 4 Open the Maintenance Isolation Breaker MIB The UPS system is now isolated from the critical load and the load is now on Maintenance Bypass 5 Ifusing a key interlock system remove the key from the lock for the Maintenance Isolation Breaker MIB to lock it open 6 Ifthe maintenance bypass cabinet or switchboard has an optional 2 key interlock system replace the key into the solenoid 7 If UPS bypass shutdown is required open the Bypass Input Breaker BIB Maintenance Bypass Load Transfers lf Load is on Maintenance Bypass 1 Close the Bypass Input Breaker BIB or verify BIB is closed Note that UPS Bypass circuit
90. r all of the alarm conditions may have been resolved To clear these alarm messages turn off control power see Figure 2 Wait at least 10 minutes for the control power circuitry to completely de energize After 10 minutes turn control power back on and wait two minutes before continuing A WARNING Risk of electrical 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 2 Power must be provided to the UPS controls so the operator can use the display touchscreen and so the system logic can function properly The display touchscreen may be used to monitor UPS system status even when the UPS modules are not operating This will be the usual condition unless you are recovering from a maintenance shutdown 3 Ifthe bypass line is not supplying the load energize the bypass line by a Closing the Bypass Input Breaker BIB external to the UPS This breaker may be in the Maintenance Bypass Cabinet The display touchscreen should start up b Pressing the Start Up then Manual Start menu buttons see Figure 30 c The Close BFB message appears in the multipurpose window Close the BFB breaker see Figure 2 d A Press OK to issue BPSS On Command message appears Press OK to
91. r using tools Even when the power is turned Off dangerously high voltage may exist at the capacitor banks Observe all battery precautions when near the battery for any reason ONLY properly trained and qualified service personnel should perform maintenance on the UPS system When performing maintenance on any part of the equipment under power service personnel and test equipment should be standing on rubber mats The service personnel should wear insulating shoes for isolation from direct contact with the floor earth ground One person should never work alone A second person should be standing by to assist and summon help in case an accident should occur This is particularly true when work is performed on the bat tery Introduction 1 0 INTRODUCTION 1 1 General Description The Liebert NXL UPS provides continuous high quality AC power to your business critical equip ment such as telecommunications and data processing equipment The Liebert NXL UPS supplies power that is free of the disturbances and variations in voltage and frequency common to utility power which is subject to brownouts blackouts surges and sags The Liebert NXL 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 at CB1 and the rectifier converts the AC utility into DC po
92. rd Loga ne ag Ate es A Sse WW ow CAs ete ia 33 33 25 Ar Filters a A n n TE Gs alle pasa e phd tesa Ree ae 33 3 3 3 Limited Life Components 34 3 4 Battery Mamtenanc evjisnsdrn elns des Ge ha AE GS 34 3 4 1 Battery Safety Precautions awauuavvr vr r ce eee E tent e ene 35 3 4 2 Torque Requirements 37 3 5 Detecting Troubles sis Dar bt ad SAGN 37 3 6 Reporting a Problem iia A E A AWE ONE BEE etg 38 3 7 Corrective Actions iaa ba a O AAA E is li 38 3 8 Upstream Feeder Circuit Breaker Setting Inspections o oooooooooomomomo o 38 40 SPECIFICATIONS pater FASER Sale aa 39 4 1 Battery Operation oa Ad tios AM 39 4 2 Environmental Conditions 66008 otk hie Vee a eee ae 8 A Bale PAP a 8 39 APPENDIX A UPS ALARM AND STATUS MESSAGES 00 00 cee eeu nr A43 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 Figure 19 Figure 20 Figure 21 Figure 22 Figure 23 Figure 24 Figure 25 Figure 26 Figure 27 Figure 28 Figure 29 Figure 30 Figure 31 Figure 32 Table 1 Table 2 Table 3 Table 4 Table 5 Table 6 Table 7 FIGURES Typical UPS system one line diagrama 2 Main component locations 5 Main Display Screen typical 6 Mime display s rskader ies OER ROE AE Ride ORES AEB aS 6 Monitor mimic display example Normal power flow 0 0 eee nes 7 M
93. rload is cleared but the UPS does not restart contact your factory authorized service provider Press SILENCE to silence the audible alarm BPSS Unable A problemi Nas been detected nithe Bypass Sele Press RESET to attempt to clear the fault Switch Contact your factory authorized service provider 46 UPS Alarm and Status Messages Table 7 Liebert NXL alarm and status messages continued Event Message Breaker Close Fail Event Definition This is a summary event that informs the user that a circuit breaker that was either signaled to close or was manually closed failed to report a closed status The Breaker Close Fail event indicates a mismatch between the expected state of a breaker and the reported state of the breaker Recommended Action Press SILENCE to silence the audible alarm Check the One Line Display and the Active Event Window to determine which breaker or switch is open If the open breaker cannot be reset or closed or if all breakers are closed but the One Line Display does not agree or the alarm cannot be cleared contact your factory authorized service provider Breaker Open Fail This is a summary event that informs the user a circuit breaker that was either signaled to open or was manually opened failed to report an open status The Breaker Open Fail event indicates a mismatch between the expected state of a breaker and the reported state of
94. roughout the world Specifications subject to change H K without notice ong Kong Liebert is a registered trademark of Liebert Corporation 852 2572220 All names referred to are trademarks Fax 852 28029250 or registered trademarks of their respective owners SL 25425 REVO 02 08 Emerson Network Power The global leader in enabling Business Critical Continuity EmersonNetworkPower com I AC Power I Embedded Computing I Outside Plant Il Racks amp Integrated Cabinets HI Connectivity I Embedded Power I Power Switching amp Controls I Services HI DC Power Il Monitoring I Precision Cooling Il Surge Protection Business Critical Continuity Emerson Network Power and the Emerson Network Power logo are trademarks and service marks of Emerson Electric Co 2008 Emerson Electric Co
95. rvice provider Press SILENCE to silence the audible alarm Check the status of Battery Circuit Breaker ff If it is open the alarm is normal If Battery Circuit Breaker is closed contact your factory authorized service provider 43 UPS Alarm and Status Messages Table 7 Liebert NXL alarm and status messages continued Event Message Batt Discharging Event Definition The UPS is on battery The most common reason for going to battery is a loss of rectifier input power power outage This alarm is self clearing When the condition is no longer present the alarm and any control activity tied to the alarm reverts to normal Recommended Action Press SILENCE to silence the audible alarm Observe the One Line Display If the input line is orange black or gray the battery discharging condition is normal If the input line on the One Line Display is green check the Active Event Window for potential fault conditions that could explain why the UPS is on battery An example of this could be Rectifier Fault Monitor the UPS during the battery discharge The display shows the discharge curve of the battery When the Battery Voltage Line touches the End of Discharge Line the UPS shuts down Check the bypass line on the One Line Display If the line feeding the Static Bypass Switch BPSS is green the unit can be transferred to bypass by pressing Transfer Bypass
96. s 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 2 Overload has since dropped below 100 of the rated load 3 Both the Input and the Battery MBD circuit breakers have remained closed since the overload transfer 4 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 5 Cyclic type overloads which 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 30 Maintenance 3 0 MAINTENANCE 3 1 Safety Precautions Observe the safety precautions in Battery Cabinet Precautions inside the front cover NOTE Service and maintenance work must be performed only by properly trained and qualified personnel and in accordance with applicable regulations as well as with manufacturers specifications Observe ALL of the WARNINGS below before performing ANY maintenance on the UPS System and associated
97. stable The battery test fail criteria were met before the end of the timed battery test For example there must be at least 25 load to run the battery test If during the battery test the load drops below 25 the test fails Press SILENCE to silence the audible alarm Contact your factory authorized service provider Batt Test Inhibit The conditions required to perform an automatic battery test are not met When the battery test is inhibited the system delays the test for 7 days If conditions are satisfied after 7 days the UPS performs the battery test at that time Examples of conditions required to run the automatic battery test are at least 20 load all battery breakers closed normal operation etc Check the Active Event Window and investigate other events to further analyze If there are other active events in the Active Event Window press RESET to clear the events Check the One Line display to verify the UPS is online Check the Module Output Meter and verify the kW load is between 20 100 Press the Battery Box on the One Line Display and verify all battery strings show at least 90 charged and all battery breakers are closed If the issue cannot be resolved contact your factory authorized service provider Batt Test Passed The Battery Test passed None The Backfeed Breaker is open The Backfeed Breaker feeds the Static Bypass Switch BPSS The physical location of the bre
98. stigate the overload condition If the Module Output Meter does not indicate an overload condition perform the previous steps and contact your factory authorized service provider 47 UPS Alarm and Status Messages Table 7 Liebert NXL alarm and status messages continued Event Message Byp Overload PhC Bypass Breaker CB3 Close Fail Event Definition The critical load is greater than 110 while the UPS is on bypass The controls may shut the unit down if the overload condition does not clear within the allotted time Allotted time is variable and is inversely proportional to the amplitude of the overload i e the greater the amplitude of the overload the less time the unit continues to support the load This alarm is self clearing When the condition is no longer present the alarm and any control activity tied to the alarm reverts to normal The bypass circuit breaker has failed to respond to a close signal Recommended Action Press SILENCE to silence the audible alarm Observe the calculated load percentage on C phase displayed on the Module Output Meter If the C phase steady state load percentage exceeds 110 perform the following If Maintenance Bypass is available follow Standard Operating Procedures to transfer the load to Maintenance Bypass If Maintenance Bypass is not available but the system has an Internal Bypass Breaker CB3 on the One Line Display close CB3 Note that dep
99. ters 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 NXL models have a replaceable air filter located inside the front doors These filters can be changed while the UPS is in operation 33 Maintenance 3 3 3 Limited Life Components 3 4 The Liebert NXL UPS has a design life well in excess of 10 years Well maintained units can continue to provide economic benefits for 20 years or more Long life components are used in the UPS wherever practical and cost effective However due to the currently available component material manufactur ing technology limitations and the general function and use of the component a few components in your Liebert UPS will have a shorter 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 criti cal load operations Liebert recommends these components be periodically inspected and replaced before the expected expiration o
100. the audible alarm Press RESET to attempt to clear the alarm condition If the alarm clears press Startup Device Control Close Trap to manually close the filter contactor If the contactor remains closed check the Input Meter and verify the input currents are balanced If the contactor re opens and the Input Current Imbalance returns silence the alarm leave the filter contactor open and contact your factory authorized service provider 53 UPS Alarm and Status Messages Table 7 Liebert NXL alarm and status messages continued Event Message Input Current Limit Event Definition An active Input Current Limit alarm means the detected input current RMS exceeds the limit setpoint default is 125 This may be normal depending on various operating conditions such as input voltage level output load level and whether the batteries have recently discharged This alarm is self clearing When the condition is no longer present the alarm and any control activity tied to the alarm reverts to normal Recommended Action Press SILENCE to silence the audible alarm Observe the meters on the One Line Display for input voltage level battery charge discharge current and output load percentage kW Investigate any abnormal readings If the reason for the alarm cannot be determined contact your factory authorized service provider Input Disconnect The rectifier disco
101. tion has been cleared until user acknowledges it by pressing the Reset button Audible yes no Will set Audible alarm when event occurs Event log yes no Will display event in Event log when it occurs NOTE You must press Save for changes to take effect See Table 7 for a list of alarms fault and status messages Figure 14 Typical Event Management Parameters 2 2 3 2 2 4 Status Audible Event Log gt o o LELLLIE afefefefefe afefefefefe Batt Equalizing Batt Self Test o o Batt Test Inhibit Batt Test Passed o o LBS Operating Load on Bypass Alarms Faults Sta Save Cancel Status Reports Menu A This menu accesses the events records Event Log Up to 1024 time date stamped events are captured in the log The oldest record will be overwritten with a new record once the buffer reaches 1024 events System Status Total Operating Hours Total number hours the UPS has been operational Battery Operating Time A running total of the battery discharge time for all events since the log was last cleared Startup Menu This menu is used to start the UPS and individual devices Manual This will begin the UPS startup See 2 4 Manual Procedures for details Devices Close Trap This will start the Input filter if installed Close MBD BCB If MBD is motor operated the Close command will Enable and energize the motor to close If MBD is not mo
102. tor 100kw X 1000 100000 480volts X 7PF X 1 73 581 28 100000 581 28 172 amps The load remains the same but the current required to supply it is roughly 30 higher The extra current is wasted energy that can result in nuisance trips of breakers overheating of cables and other unwanted conditions The UPS cannot control the output power factor This alarm is notification to the Recommended Action Press SILENCE to silence the audible alarm Evaluate the load on the UPS For more information contact your factory authorized service provider Main Control Fault The UPS has transferred to Bypass due to a loss of communications with the Main Controller All Transfers Startup Shutdown and Metering screens are locked out The Controls attempt to reestablish communications but will not return the load to inverter automatically Press SILENCE to silence the audible alarm Contact your factory authorized service provider If communications are reestablished the One Line Display will be restored however Liebert does not recommend attempting to return the load to inverter until a service visit has been made and action taken to determine why the fault occurred Action will involve resetting the UPS controls by removing and then reapplying control power Therefore it will be necessary to utilize maintenance bypass either by closing the optional CB3 internal bypass breaker or by closing the optional exter
103. torized the Close command will Enable the breaker UVR The MBD BCB must be closed manually If no MBD is selected do not display this setting 14 Operation 2 2 5 Shutdown Menu This menu permits shutting down the UPS and individual devices Figure 15 Shutdown menu BYPASS A B e ESE O 0 o Freq 0 0Hz BATTERY 1 OF 4 Voltage Disable Temp Disable Charge 0 Legend mba Inlet Air Temp 0 C RESET SILENCE i Shutdown open Trap open MBD UPS system CONFIG STATUS REPORTS STARTUP SHUTDOWN TRANSFER BATT MGT METERING HELP Open Trap Open the input trap filter Open MBD BCB Opens the associated MBD or BCB breaker UPS tTurns off inverter rectifier and trips all battery breakers Transfers to bypass if available NOTE The following popup window is displayed when the UPS is about to be shut down To shut down the UPS an operator must press OK Figure 16 UPS shutdown popup Pressing Ok will shut off the UPS and transfer the load to Bypass Static Switch if available The UPS output will completely shut off if Bypass Static Switch is not available Load Drop will occur ok Cancel System Turns off inverter rectifier and trips all battery breakers Will shutdown UPS completely NOTICE Risk of equipment damage This command will result in the load being shut down The following popup window is displayed when the UPS is about to be shut down To shutdown the UPS an op
104. transfers safely to the bypass line If the UPS is on battery and the bypass line on the One Line Display is not green contact your factory authorized service provider immediately and prepare to shut down as the UPS turns off once the batteries are depleted Press SILENCE to silence the audible alarm Press RESET to attempt to clear the fault condition If the Rectifier Fault clears press Startup Manual Start Rectifier to attempt to restart the Rectifier If this is successful observe normal operation of the Rectifier indicated on the One Line Display by a green outline around the Rectifier box and normal DC Bus voltage on the DC Bus Meter If the Rectifier starts normally attempt to close the input filter contactor by pressing Startup Device Control Close Trap If the UPS is not on battery but transferred to bypass contact your factory authorized service provider If the Rectifier Fault was cleared by pressing RESET but the fault returns as soon as a Rectifier restart is attempted contact your factory authorized service provider Redundant Fan Fail This alarm indicates a fan has failed Press SILENCE to silence the audible alarm Contact your factory authorized service provider Regen Active Regeneration Mode is a service mode that is normally controlled by the service technician Regeneration Mode Status or Alarm messages are generally intended for the ser
105. tring is a leaking battery If the condition will not clear repeat the test with If your system includes an optional Battery each connected battery string Ground Fault Monitor check if the Battery Ground Once the location is identified or if the battery string Fault message is present also tests are inconclusive contact your factory authorized service provider Press SILENCE to silence the audible alarm e Press RESET to clear the fault in positive DC Bus has a ground fault M Perform a visual inspection of the batteries Look for e UPS controls monitor the DC Bus positive half for a voltage imbalance caused by current signs of leaking battery acid or excessively gen ye corroded battery terminals fow to ground This fault means excessive If there are no visible signs of defective batteries ground current is detected 9 i i DE Link In normal operation with the batteries connected open One Battery Breaker Fress RESET ere Gnd Fault if the condition clears If the condition clears you the most likely cause of a current path to ground is a leaking battery If your system includes an optional Battery Ground Fault Monitor check if the Battery Ground Fault message is present also have isolated the problem to that battery string If the condition will not clear repeat the test with each connected battery string Once the location is identified or if the battery string tests are inconclusive co
106. ttery Block Displays the battery voltage and the charge or discharge current to or from the bat tery Pressing this icon switches among the connected battery strings The Module Battery Discon nect MBD is to the right of this block The circuit breaker status is shown as open or closed DC Bus Displays the DC Bus voltage and the state of the battery charger Load Displays the output line voltage phase voltage current KVA kW power factor and fre quency The critical load current per phase is also displayed in this block During an overload the time remaining before transfer is displayed at the bottom of the load box After an overload transfer retransfer timeout is displayed at the bottom of the load box Operation Figure 5 Green Normal Orange Marginal Gray Absent Black Unknown Figure 6 Green Normal Orange Marginal Gray Absent Black Unknown Monitor mimic display example Normal power flow BATTERY 1 OF 2 Voltage 535 Y Temp 26 C Charge 91 Legend Inlet Air Temp 22 C RESET SILENCE INPUT MODULE OUTPUT AA AAA A B A B c L L 485 490 491 Y L L 480 480 480 V Load UPS oso 11 Amps 181 182 177 A L N 277 277 277 v Freq 60 0 Hz Amps 169 169 170 A pc Bus qualified 4 DIR KVA 47 47 48 A B c KW 52 52 52 L L 492 494 491V PF 1 0 1 0 0 98 Freq 60 0 Hz KVA KW 141 140 Freq 59 9 Hz DC BUS Volts 540 v Amps Float A e gt 9 per ep
107. turers specifications Use the module Monitor Mimic Display to determine the operating condition of the UPS module UPS Shutdown Procedure NOTE This shutdown turns Off the inverter and the rectifier and trips all battery breakers Transfers to bypass if available 1 Press the Shutdown menu button on the touchscreen The Shutdown screen will appear in the multipurpose window see Figure 15 2 Press the UPS button This brings up a warning dialog box see Figure 16 3 Press OK to shut down the UPS System Shutdown Procedure 2 6 2 6 1 NOTE This shutdown turns Off the inverter and the rectifier and trips all battery breakers Will shut down UPS completely 1 Press the Shutdown menu button on the display touchscreen The Shutdown screen will appear in the multipurpose window see Figure 15 2 Press the System button This brings up a warning dialog box see Figure 17 3 Press OK to shut down the system Automatic Operations The Liebert NXL UPS system is designed to function while unattended by an operator The system control logic monitors the performance of the UPS the availability of power sources and the current required by the critical load The system control logic Determines what overload conditions can be sustained without a transfer to bypass Initiates an automatic transfer to bypass to sustain an overload or when selected UPS faults occur Can initiate an automatic retra
108. ual 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 The touchscreen lists all steps required for each manual procedure This section lists step by step con trols to operate and conditions to observe in the following manual procedures Startup including initial startup recovering from input power failure recovering from battery 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 transferring from internal bypass to mainte nance bypass and transferring from maintenance bypass to internal bypass Shutdowns including module shutdowns for maintenance and emergency shutdowns NOTE The following procedure assumes that the UPS installation inspection and initial startup have been performed by Liebert Services A Liebert authorized representative must perform the initial system startup to ensure proper system operation 23 Operation 2 4 1 Startup Procedure A CAUTION The following procedure provides power to the critical load distribution system Verify that the critical load distribution is ready to accept power Make sure that personnel and equipment are ready for the critical load distribution system to
109. unication Failure event is displayed when the HMI detects a loss of communication with Controls on the Controller Area Network CAN An infrequent occurrence that resets immediately is probably not serious Recommended Action If the alarm does not clear or if the alarm condition returns contact your factory authorized service provider Controls Reset This alarm means one or more critical settings have been changed by user during UPS operation The change s will not take effect until after a UPS Press SILENCE to silence the audible alarm Required Controls reset This operation should only be performed by an authorized service personnel This alarm is cleared after UPS Controls reset Press SILENCE to silence the audible alarm Press RESET to clear the fault The negative DC Bus has a ground fault Perform a visual inspection of the batteries Look for The UPS controls monitor the DC Bus negative signs of leaking battery acid or excessively half for a voltage imbalance caused by current corroded battery terminals flow to ground This fault means excessive If there are no visible signs of defective batteries DC Link ground current is detected open one Battery Breaker Press RESET and see Gnd Fault In normal operation with the batteries connected if the condition clears If the condition clears you the most likely cause of a current path to ground have isolated the problem to that battery s
110. vent Definition This summary event means the conditions required to perform a manual transfer to bypass are not met Inverter must be in sync with bypass This status message is self clearing When the condition is no longer present the message and any control activity tied to the status event reverts to normal Recommended Action The condition clears from the Active Event Window when manual transfers are enabled A possible reason for this condition is an unstable generator If the generator frequency is not stable or not at 60 Hz the Inverter may have difficulty maintaining synchronization with the bypass source To check the synchronization of the Inverter to bypass click Transfer and observe the synchroscope A non sync condition is indicated by a varying phase angle error rather than a stable 0 degree indication If the unit is not on generator and the bypass voltage otherwise appears normal contact your factory authorized service provider Max Load Alarm PhA The user adjustable maximum load alarm threshold was exceeded This is a notification only type alarm meaning the UPS takes no action other than sounding an audible alarm based on this setpoint The setting allows the user to monitor the load status of the UPS For example if the current load on Phase A is 50 the user can set this setpoint to 80 and an alarm is received if the added load exceeds 80 The alarm may also be configured
111. versus time curves of overload capacity 0 29 TABLES UPS component service life ee eee e ee eee een are 34 Battery voltage nominal and float ee cent rv rea 36 Battery retorque values 36 Torque specifications unless otherwise labeled 0 0c ccc tenes 37 Environmental specifications 39 BlectricalspecificatiOns saan eve ik ce Sk ee A ad SA ase Bhs Ace G 40 Liebert NXL alarm and status messages nunnana nananana 43 iii IMPORTANT SAFETY INSTRUCTIONS SAVE THESE INSTRUCTIONS This manual contains important instructions that should be followed during installation and mainte nance of your Liebert NXL UPS and batteries A WARNING Risk of electric shock Can cause equipment damage injury or death Exercise extreme care when handling UPS cabinets to avoid equipment damage or injury to personnel Refer to separate installation manual for equipment handling information and installation procedures Follow all battery safety precautions in 3 0 Maintenance when installing charging or servicing batteries In addition to the hazard of electric shock gas produced by batteries can be explosive and sulfuric acid can cause severe burns In case of fire involving electrical equipment use only carbon dioxide fire extinguishers or others approved for use in electrical fire fighting Extreme caution is required when performing maintenance Service and maintenance work must be performed only
112. vice person This status message informs the user the UPS is in Regeneration Mode This status message is self clearing When the condition is no longer present the alarm and any control activity tied to the alarm reverts to normal Under normal circumstances none If this message is active and there is no clear reason why the UPS is in Regeneration Mode contact your factory authorized service provider Regen Failure Regeneration Mode was initiated and terminated because of an abnormal condition Once Regeneration Mode is active any condition for example an Inverter Overload other than the user manually stopping Regeneration Mode causes this message to appear Regeneration Mode is a service mode that is normally controlled by the service technician Regeneration Mode Status or Alarm messages are generally intended for the service person This status message informs the user the UPS is in Regeneration Mode This status message is self clearing When the condition is no longer present the alarm and any control activity tied to the alarm reverts to normal Press SILENCE to silence the audible alarm Press RESET to attempt to clear the alarm If Regeneration Mode was not manually initiated by service or if this alarm will not reset contact your factory authorized service provider 60 UPS Alarm and Status Messages Table 7 Liebert NXL alarm and status messages continued
113. wer The inverter converts that DC power from the utility or DC power from the batter ies into AC power for the load The batteries 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 maintenance bypass Figure 1 Typical UPS system one line diagram 1 2 1 2 1 Battery System MBD Modes of Operation Normal Mode Operating in normal mode the Liebert NXL 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 con nected equipment The rectifier also uses the utility source power to charge the batteries Introduction 1 2 2 1 2 3 1 2 4 1 3 Bypass Mode When the Liebert NXL is in bypass mode the load is directly supported by utility power and is with out battery backup protection The Liebert NXL s inverter and bypass static switch will shift the load from the inverter to bypass mode without an interruption in AC power if the inverter is synchronous with the bypass and any of the following occurs Inverter fails Inverter 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 t
114. with a delay to prevent nuisance alarms due to cycling loads The alarm is self clearing Once the load level decreases to less than 95 of the level setting the alarm clears Press SILENCE to silence the audible alarm Check the kW load displayed for A phase To check the setpoint for the alarm press Config User Settings Adjustable Setpoints Max Load Alarm Compare the setpoint to the displayed load percentage If the load percentage displayed is correct and the value exceeds the setpoint raise the setpoint to clear the alarm or reduce the load below the setpoint Contact your factory authorized service provider The user adjustable maximum load alarm threshold was exceeded This is a notification only type alarm meaning the UPS takes no action other than sounding an audible alarm based on this setpoint The setting allows the user to monitor the load status of the UPS Press SILENCE to silence the audible alarm Check the kW load displayed for B phase To check the setpoint for the alarm press Config User Settings Adjustable Setpoints Max Load Alarm Max Load For example if the current load on Phase B is Campatehe Seteaintie the displaved load Alarm Ph B 50 the user can set this setpoint to 80 and an p t If th y d t p da laved i alarm is received if the added load exceeds 80 POreentage C QAC percentage CISp aysa 1S The alarm may als

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