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Emerson Liebert ITA 5kVA, User Manual

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42      Chapter 5  UPS Operation Instructions 

Liebert

®

 ITA 5kVA And 6kVA UPS    User Manual 

CB1

CB2

SW

 

Figure 5-53    Configuration of the single UPS with external maintenance bypass 

For the UPS system which requires the power distribution to be accomplished by user, if you need to isolate the UPS 
from AC power, disconnect the external input MCB. 

Warning 

Cut off the maintenance power to prevent physical injury.

 

 

5.9   Auto Restart 

Upon mains failure, the UPS supplies power to the load through battery until the battery power is depleted, and the 
UPS will terminate output. 
Meet the following conditions, the UPS will automatically restart and recover output power supply. 

 The mains restores after battery EOD; 

 The UPS EOD Auto Restart function is enabled. 

Note 

1. The UPS EOD Auto Restart function is enabled by default if there is no customized requirement. 
2. If the Auto Restart function is not enabled, you can start the UPS manually by pressing the ON/SILENCE key. 

 

5.10   UPS Monitoring 

For the methods of the UPS background monitoring, refer to 

SiteMonitor Monitoring Software User Manual

 delivered 

with the UPS. 
 

Summary of Contents for Liebert ITA 5kVA

Page 1: ...Liebert ITA User Manual 5 6kVA UPS ...

Page 2: ......

Page 3: ...ances salts or flammable gases are present 4 Keep the air inlet and outlet well ventilated Poor ventilation will increase the internal temperature which will shorten the life of the UPS components and that of the UPS 5 Liquid or other irrelevant external objects are prohibited inside the UPS 6 In case of fire a dry chemical fire extinguisher is essential Using a foam fire extinguisher will cause e...

Page 4: ...ed to service personnel 2 The UPS meets the safety requirements completely in operator access area Only service personnel can contact the hazardous voltage inside the UPS However the risk of contacting these voltages is minimized because the components with hazardous voltage may be contacted only by using a tool to remove the protective cover No risk will exist if you follow the general norms and ...

Page 5: ...1 Location 8 2 2 2 Environmental Requirements 8 2 2 3 Installation Tools 10 2 3 External Protective Devices 10 2 3 1 Battery Input 10 2 3 2 UPS Output 10 2 4 Mechanical Installation 10 2 4 1 Tower Installation 10 2 4 2 Rack Installation 12 2 5 Connecting Power Cables 15 2 5 1 Connecting I O Cables 16 2 5 2 Connecting Battery Cables 18 2 5 3 Connecting 10A Charger Cables 21 2 6 Single UPS Commissio...

Page 6: ...ng UPS Operation Modes 40 5 7 1 Transferring UPS To Bypass Mode From Normal Mode Manually 40 5 7 2 Transferring UPS To Bypass Mode From Overload Protection 40 5 7 3 Transferring UPS To Inverter Mode From Bypass Mode Manually 40 5 7 4 Transferring UPS To Battery Mode From Mains Failure 40 5 7 5 Transferring UPS To Bypass Mode From Inner Overheating Protection 40 5 7 6 Transferring UPS To Fault Stat...

Page 7: ...9 8 2 3 Back Up Time Of Standard Battery Module For Single UPS 50 8 3 POD 50 8 3 1 1 In 1 Out 1 1 Parallel POD 50 8 3 2 1 In 1 Out 3 1 Parallel POD 51 8 3 3 3 In 1 Out 3 1 Parallel POD 52 8 3 4 Output Power Distribution POD 53 8 4 Complete Set Of Cables 54 8 4 1 Parallel Communication Cables 54 8 4 2 Battery Cable 54 8 5 Guide Rail For Rack Installation 54 8 6 Communication Options And Monitoring ...

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Page 9: ...essor DSP to achieve high system reliability with self protection and fault diagnosis functions Excellent intelligent battery management to extend the battery life Display panel with both LCD and LED indication to help you learn about the UPS operation status and operating parameters 2U thickness Tower installation and rack installation are optional to meet different installation requirements Capa...

Page 10: ...00859 17 8kg 435 85 640 You need to select battery modules according to the requirement or connect the external battery modules by yourself 1 3 Appearance And Components 1 3 1 Appearance The UPS appearance is shown in Figure 1 1 Figure 1 1 UPS appearance 1 3 2 Components Front panel As shown in Figure 1 2 the UPS front panel provides ventilation holes and display panel Display panel Ventilation ho...

Page 11: ...itch connects the inverter to the load and the mains supplies DC power to the inverter through the rectifier PFC circuit The inverter then converts DC power into pure sine wave AC power and supplies the AC power to the load through the electronic transfer switch 3 When the mains is abnormal the rectifier PFC circuit boosts the battery voltage and supplies it to the inverter The inverter then conve...

Page 12: ...ains after processing of the rectifier and the inverter and meanwhile the charger is charging the battery the operation mode is Normal mode In Normal mode the MAINS indicator and the INVERTER indicator are on 1 5 2 Bypass Mode If the overload overtime inverter or rectifier failure appears during the UPS operation in Normal mode the UPS will transfer to Bypass mode that is the load is powered by th...

Page 13: ...nergy saving operation mode For power equipment insensitive to power grid quality you can use the ECO mode for power supply through bypass to reduce the power loss When the bypass voltage is normal the inverter is in no load state the load is supplied by the bypass AC source and the BYPASS indicator is on Note 1 In ECO mode if the bypass failure or abnormal bypass voltage appears when the output i...

Page 14: ... phase 305Vac 478Vac at full load Single phase 120Vac 176Vac 3 phase 210Vac 305Vac linear derating Single phase 120Vac 3 phase 210Vac at half load Frequency 50Hz 60Hz 5Hz Input Power factor Single phase 0 99 3 phase 0 95 Rated power 4 5kW 4 8kW Voltage 220 230 240Vac 3 Frequency In Normal mode the output tracks the bypass frequency when the bypass frequency is within 50Hz 60Hz 5Hz Frequency track ...

Page 15: ...onic current I 16A IEC EN61000 3 2 16A I 75A IEC EN61000 3 12 YD T1095 2001 level 2 15 Surge protection IEC EN 61000 4 5 endurance level 4 4kV live line to earth level 3 2kV during live lines Protection level IP20 Operating temperature 0 C 40 C Storage temperature 40 C 70 C battery excluded 20 C 55 C battery included Relative humidity 5 95 non condensing Ambient condition Altitude 1500m derating i...

Page 16: ...ories and models against the delivery list If any problem is found please notify the dealer immediately 2 2 Installation Preparation 2 2 1 Location To extend the UPS life the chosen place must offer Convenient wiring Adequate operator access area Good ventilation to meet the heat dissipation requirements No corrosive gas such as sulfur dioxide and so on No excessive moisture or heat source No exce...

Page 17: ...y environmental temperature should keep constant because the environmental temperature is the main factor to affect the battery capacity and life The battery standard operating temperature is 20 C operation above this temperature will shorten the battery life and operation below this temperature will reduce the battery capacity If the battery average temperature in operation rises from 20 C to 30 ...

Page 18: ...protective devices must be installed at the external AC input end of the UPS This section provides the general guidance for qualified installation engineer The qualified installation engineer should learn about the local wiring regulations and other related information 2 3 1 Battery Input If the battery module option is provided by Emerson the battery module has a built in overcurrent protective d...

Page 19: ...ng the display panel you do not need to open the chassis of the UPS 2 Install the plastic panel 1 Take out the plastic panel from the UPS package 2 Align the plastic panel with the UPS display panel and gently press the metal buckles on both sides of the plastic panel into the square holes on the UPS front panel according to the direction shown in Figure 2 3 Square hole Plastic panel Display panel...

Page 20: ... with the battery module and then assemble the support base extensions and the support bases through the fastenings as shown in Figure 2 6 Support base Support base extension Fastening Figure 2 11 Installing the support base with support base extension 5 Place the UPS and battery module if applicable on the support bases and support base extensions Each UPS needs four support bases to install as s...

Page 21: ...res of the guide rails are as follows 1 Take out the guide rails one left guide rail and one right guide rail guide rail screws and panel screws from the package distinguish the left guide rail and right guide rail according to Figure 2 9 and confirm its retractable function respectively Installation hole 6 pcs Left guide rail Right guide rail Figure 2 14 Appearance of the guide rail Distinguish t...

Page 22: ...n the rack and push it completely into the rack Use four panel screws M4 16 to fix the UPS in the rack through the installation hole 2 of the brackets as shown in Figure 2 13 UPS Rack Installation hole 2 4 pcs Screw 4 pcs Figure 2 18 Installing the UPS Installation procedures for UPS with battery modules The installation method of the battery module is the same as that of the UPS Repeat the instal...

Page 23: ...lected according to the current value shown in this table the max allowable voltage drop is 4Vdc Do not ring the cables to avoid increasing the electromagnetic interference EMI 1 The input mains current of the rectifier and the bypass 2 Non linear load switch mode power affects the neutral cable design of the output and the bypass The neutral cable current may exceed the rated phase current up to1...

Page 24: ...the I O terminal block Note 1 Do not reverse the input neutral line and live line 2 Do not use a wall socket to feed power to the UPS Otherwise the socket may be burned 3 Connect the output neutral line and live line and ground line correctly and reliably For the sake of safety the ground line must be connected firstly 4 Install a three pole or quadrupole linkage breaker on the mains input neutral...

Page 25: ...ine terminal of the UPS I O terminal block and tighten the fixing screws Short the input live line terminal V input live line terminal W and input live line terminal U1 using the shorting wire label W01 as shown in Figure 2 19 6 Connect the output L line N line and PE line respectively to the output live line terminal output neutral line terminal and output ground line terminal of the UPS I O term...

Page 26: ...attery module connection principle diagram Warning 1 As shown in Figure 2 21 DC battery MCBs must be added between the battery string and the UPS 2 The bat_PE of the UPS must be connected to the metal enclosure of the battery cabinet directly and reliably and the wiring of the Bat and the Bat should be laid side by side and be the same direction to make sure that only one point for the system is g...

Page 27: ...or long back up UPS battery cabinet is used The long back up UPS provides a battery cable B which has a PP45 plug on one end and three OT terminals on the other end as shown in Figure 2 24 It is used to connect the battery cabinet to the UPS Figure 2 29 Battery cable B The connection procedures are as follows 1 Disconnect the input MCB of the external battery cabinet 2 Connect the red line and bla...

Page 28: ...rocedures are as follows 1 Make sure that all the external input MCBs and output MCBs of the UPS are open 2 Use voltmeter to measure and confirm that there is no DC voltage on the battery port on the UPS rear panel see Figure 1 3 3 Connect the red black and yellow terminal of one end of the battery cable A to the corresponding terminal of the battery port on the rear panel of the UPS and connect t...

Page 29: ... accessory of the standard UPS but also the option of the long back up UPS 3 The maximal allowable charge current of the standard battery module is 2 16A and the maximal allowable charge current of the long back up UPS is 4A therefore when the standard battery module is used to connect with the long back up UPS the number of the standard battery modules is not less than 3 2 5 3 Connecting 10A Char...

Page 30: ...ase keep the protective cover appropriately When the control port is not used restore the protective cover to its original place to avoid electrical shock 3 The maximal allowable charge current of the battery module is 2 16A and the maximal allowable charge current of the 10A charger is 10A therefore when the standard battery module is used to connect with the long back up UPS the battery shared m...

Page 31: ...lf test cycle Set the self test cycle of the battery Disabled ECO function Set whether ECO function is enabled Enabled EOD startup Set whether startup is automatic Enabled Parameters setting of the optional LCD display panel The parameters of the single UPS can be set through the LCD display panel the parameters are listed in Table 2 6 Table 2 8 Setting parameter of the single UPS Parameter Descri...

Page 32: ...rs status 4 Measure whether the inverter output voltage is normal 2 6 4 Battery Mode Startup 1 Close the battery MCB press the ON SILENCE key for more than one second the UPS will start up and enter the self test status including the battery self test All LED indicators blink the buzzer beeps at intervals After the self test the UPS will enter the standby mode 2 Press the ON SILENCE key for more t...

Page 33: ...Chapter 2 Single UPS Installation And Commissioning 25 Liebert ITA 5kVA And 6kVA UPS User Manual Figure 2 37 Indicators status ...

Page 34: ...dancy for the system 3 2 Requirements A UPS system composed of multiple parallel connected UPSs is equivalent to a large UPS system Nevertheless it provides increased system reliability To ensure equal utilization of all UPSs and compliance with relevant wiring regulations the following requirements must be met 1 All single UPSs must have the same capacity and must be connected to the same main an...

Page 35: ... the user requirements the I O cable connections are divided into two types 1 in 1 out default and 3 in 1 out Using the parallel POD power distribution In the UPS parallel system it is recommended to use POD provided by Emerson to perform power distribution Refer to Liebert ITA 5kVA And 6kVA UPS Parallel Power Distribution Unit User Manual for the power cable connection Self distribution The block...

Page 36: ...y port 192Vdc 27A PE Paralleled address Control port Input switch 230 400Vac 40A Intellislot Battery port 192Vdc 27A PE Paralleled address Control port Input switch 230 400Vac 40A Intellislot Battery port 192Vdc 27A PE UPS1 UPS2 UPS3 UPS4 Figure 3 40 Parallel cable connection schematic diagram of 3 1 parallel system Note The parallel cables provided by Emerson must be used for the parallel system ...

Page 37: ...ning For Parallel System 1 Power on and commission each UPS of the parallel system respectively namely power on one UPS each time and other UPSs are in the turn off status the specific commissioning procedures are as follows 1 Close the external input MCB output MCB battery MCB and input MCB of one UPS the UPS is powered on Ensure that other UPSs are in the turn off status If POD is configured clo...

Page 38: ...d close the corresponding input MCB and output MCB of the POD Follow the preceding steps to start the inverter of the second UPS check that there is no alarm on the LCD display screen and confirm that the UPS parallel works normally 3 Follow the preceding methods to start up the inverter of the third or the fourth UPS to connect the UPS into the parallel system Warning During the parallel startup ...

Page 39: ...cations 1 UPS state indicators FAULT indicator MAINS indicator BATTERY indicator BYPASS indicator and INVERTER indicator The FAULT indicator is red and the other indicators are green 2 UPS load battery capacity and fault orientation indicator includes five indicators of which four indictors are green and one indicator is yellow The yellow indicator indicates UPS load over capacity or battery capac...

Page 40: ...d capacity 76 95 load capacity 96 105 load capacity Normal mode 105 load capacity 2Hz 0 25 battery capacity 1Hz 26 50 battery capacity 1 3Hz 51 75 battery capacity 1 3Hz 76 95 battery capacity 1 3Hz Battery mode 96 battery capacity 1 3Hz 105 load capacity Bypass mode 105 load capacity 2Hz 105 load capacity Inverter standby 105 load capacity 2Hz Non operation mode Short fault Charger failure fan ov...

Page 41: ... one second silences the alarm and do the same operation can resume the alarm beep 4 2 LCD Display Panel The LCD display panel provides LED indicators a LCD display screen and control keys as shown in Figure 4 2 FAULT indicator BYPASS indicator MAINS indicator BATTERY indicator INVERTER indicator LCD display screen ENTER key ON SILENCE key OFF key CYCLE key Figure 4 42 LCD display panel The functi...

Page 42: ...wn in Figure 4 3 the interface of the 5kVA UPS is the same as the interface shown in Figure 4 3 except the capacity LIEBERT ITA 6KVA UPS EMERSON NETWORK POWER CO LTD Figure 4 43 Power on interface 2 Menu interface The menu interface includes running interface alarm message interface and setting interface the main menu interface is shown in Figure 4 4 RUNNING ALARM MESSAGE SETTING Figure 4 44 Main ...

Page 43: ...ature for radiator Fan fault Auxiliary supply failure Input neutral line in disconnected Parallel line fault Current sharing fault Parallel address conflict Module communication fault Alarm message menu Figure 4 45 Structure diagram of the menu interface The parameters of the single UPS can be set through the LCD display panel the parameters are listed in Table 4 5 Table 4 14 Setting parameter of ...

Page 44: ...o charge the battery for eight hours before putting the UPS into first operation to ensure adequate back up time 3 The display panel of the 6k VA UPS is the same with that of the 5kVA UPS except the silkscreen Take the display panel of the 5kVA UPS for example in this chapter 5 1 Check Before Power On Before power on check the following items 1 Check that the UPS input cables and output cables are...

Page 45: ...te 1 If the UPS transfers from Normal mode to Bypass mode three times within one hour due to overload it will remain in Bypass mode for one hour afterwards and cannot transfer back to Normal mode until the overload fault is removed 2 Single UPS can start up in Normal mode and Bypass mode refer to 2 6 3 Normal Mode Startup and 2 6 4 Battery Mode Startup for details 3 Refer to 3 5 2 Startup Commissi...

Page 46: ...ill be removed Figure 5 49 Indicators states 5 4 2 Battery Manual Self Test Battery manual self test includes battery in position test and battery state test In normal state when the mains is normal the rectifier output is not overloaded meanwhile the battery voltage is not less than 12V press and hold the ON SILENCE key for four seconds the battery will start self test the BATTERY indicator will ...

Page 47: ...de turning off UPS from Battery mode and turning off UPS from Bypass mode Turning off UPS from Normal mode Press and hold the OFF key for one second until the buzzer beeps the UPS inverter stops operating and transfers to Bypass mode At this moment the MAINS indicator and BYPASS indicator will turn on press and hold the OFF key for ten seconds the UPS enters standby state At this moment the UPS is...

Page 48: ...eeds the rated value and preset time it will transfer to Bypass mode from Normal mode and send out rapid alarm sound every 0 5 second At this moment the UPS output voltage is the mains voltage and redundant loads must be removed until the UPS does not generate overload alarm Wait for five minutes and the output will transfer to Normal mode automatically To protect the load and UPS transferring to ...

Page 49: ... transfers to static bypass and the inverter turns off 2 Close the maintenance bypass MCB on the front panel of the POD the load power is supplied by the maintenance bypass Warning If you need to maintain the UPS wait for 10 minutes approximately until the capacitance and voltage of the internal DC bus finish discharging 3 Open the UPS input MCB and output MCB 5 7 8 Transferring UPS To Inverter Mo...

Page 50: ...upplies power to the load through battery until the battery power is depleted and the UPS will terminate output Meet the following conditions the UPS will automatically restart and recover output power supply The mains restores after battery EOD The UPS EOD Auto Restart function is enabled Note 1 The UPS EOD Auto Restart function is enabled by default if there is no customized requirement 2 If the...

Page 51: ...act card RS485 card RS232 card and JBUS MODBUS adapter card Intelligent card slot Baffle of the intelligent card slot Intelligent card Figure 6 54 Intelligent card installation 6 2 1 SIC Card SIC SNMP card is a network management card which provides the UPS air conditioner static transfer system STS server power management system SPM and other intelligent devices produced by Emerson with network c...

Page 52: ...s or in Standby UPS Faulty Each dry contact output provides both normally open and normally closed ports for user The dry contact card can also receive three routes digital signal inputs two of which control the UPS turn on and turn off respectively the third is reserved Refer to the corresponding user manual for the installation and operation guide 6 2 6 Extended Dry Contact Card Besides the func...

Page 53: ...for at least 12 hours when the battery has not been charged or discharged for two months continuously Note 1 Check the screws that fix the battery connecting components periodically If the screws are loose tighten them immediately 2 Ensure that all safety equipment is complete and that the function is normal especially that the settings of the battery management parameters are correct 3 Measure an...

Page 54: ...ld the ON SILENCE key for four seconds the battery self test will start to check whether the battery is normal If any battery problem is found find out the reason immediately and take measures to solve the problem 7 6 Troubleshooting In the event of UPS abnormity and fault shoot the trouble according to the instructions in Table 7 1 If the fault persists seek technical support and service from the...

Page 55: ...er beeps for a long time the FAULT indicator is on and the LED displays OUTPUT SHORT UPS output short circuit Remove the load short circuit fault and restart the UPS 12 The buzzer beeps for a long time the FAULT indicator is on and the LED displays RECTIFIER FAIL INVERTER FAIL AUX SUPPLY FAIL or OUTPUT FAIL UPS internal fault The UPS needs repair Seek technical assistance from the local service ce...

Page 56: ...es UPS R5 UF LCD ITA 0050 LCD assembly for 5kVA UPS only for 5kVA UPS R5 LCD assembly UF LCD ITA 0060 LCD assembly for 6kVA UPS only for 6kVA UPS R5 UH62SA1SL3 Parallel cable for Liebert ITA 5kVA 6kVA 10kVA UPS ROHS Complete set of cables UH62SA1SL2 Battery cable for Liebert ITA 5kVA 6kVA UPS optional only for long back up UPS standard UPS is configured with the battery cable ROHS UF SNMP810 SIC c...

Page 57: ... please consult the dealers 3 The maximal allowable charge current of the standard battery module is 2 16A the maximal allowable charge current of the standard UPS is 4A and the maximal allowable charge current of the 10A charger is 10A therefore the number of the standard battery modules should be based on the charge capacity when you build the system 8 2 2 Appearance Of Battery Module Adjust the...

Page 58: ...m 43 3m 1h15m 2h20m 3h43m 5h55m 6 43AH 40m 55m 1h26m 2h45m 4h40m 6h21m 7 50AH 44m 58 3m 1h32m 3h4m 4h43m 6h40m 8 56AH 58m 83 3m 1h57m 3h16m 4h51m 7h05m 9 65AH 1h10m 1h32m 2h13m 3h45m 5h41m 8h11m 10 72AH 1h23m 1h57m 2h30m 4h18m 6h31m 9h27m Note The data in Table 8 3 is only for your reference because the back up time of batteries is affected by battery parameters factories and models aging degree a...

Page 59: ...over Figure 8 60 Rear panel of the 1 in 1 out 1 1 parallel POD 8 3 2 1 In 1 Out 3 1 Parallel POD The appearance of the 1 in 1 out 3 1 parallel POD is show in Figure 8 7 Plastic panel Figure 8 61 Appearance of 1 in 1 out 3 1 parallel POD Remove the plastic panel to reveal the front panel of the 1 in 1 out 3 1 parallel POD as shown in Figure 8 8 UPS1 input MCB UPS4 input MCB Maintenance bypass MCB w...

Page 60: ... O port UPS3 I O port External 10A charger port UPS4 I O port A Figure 8 63 Rear panel of the 1 in 1 out 3 1 parallel POD 8 3 3 3 In 1 Out 3 1 Parallel POD The appearance of the 3 in 1 out 3 1 parallel POD is show in Figure 8 10 Plastic panel Figure 8 64 Appearance of 3 in 1 out 3 1 parallel POD Remove the plastic panel to reveal the front panel of the 3 in 1 out 3 1 parallel POD as shown in Figur...

Page 61: ... 1 out 3 1 parallel POD The rear panel of the 3 in 1 out 3 1 parallel POD is shown in Figure 8 12 POD I O terminal block with protective cover 10A output socket 4 rows 16A output socket 3 pcs A UPS1 I O port External 10A charger port UPS2 I O port UPS3 I O port UPS4 I O port A External 10A charger port Figure 8 66 Rear panel of the 3 in 1 out 3 1 parallel POD 8 3 4 Output Power Distribution POD Th...

Page 62: ...el system three communication cables are required in 2 1 parallel system four communication cables are required in 3 1 parallel system 8 4 2 Battery Cable The battery cable is optional when the long back up UPS is selected The battery cable is an accessory of the standard UPS when the standard UPS is selected See Table 8 6 for its description Refer to 2 5 2 Connecting Battery Cables for detailed i...

Page 63: ...US card UF MODBUS210 Select it when the UPS is connected to the monitoring system of building Dry contact card UF DRY310 Provide four routes relay signal outputs and three routes digital signal inputs Extended dry contact card UF DRY320 Provide four routes relay signal outputs three routes digital signal inputs RS232 and RS485 communication function and four routes analog signal acquisition functi...

Page 64: ...ITA 0050 and UF LCD ITA 0060 are LCD display panel options for 5kVA and 6kVA UPS respectively The commissioning has been completed before delivery You need to install the LCD display panel in accordance with the UPS Refer to 4 2 LCD Display Panel for its menu structure function description and interface The appearance of the LCD display panel assembly is shown in Figure 8 17 Figure 8 71 Appearance...

Page 65: ...ay panel Note 1 There is no need to open the USP chassis cover in process of replacing the LCD display panel 2 Note the screw position and clip on the other side when installing and removing the display panel assembly During installation first put the clip on the side of the display panel into the UPS chassis then fix the screws when removing the display panel reverse the procedures 3 The rotation...

Page 66: ...ion Dimension Height Width Depth Weight UF BSO 0050 Battery shared module When a battery string of large capacity supplies power to several 5kVA UPSs at the same time the battery shared module is needed 377mm 435mm 85mm 6kg For the details of the battery shared module refer to UF BSO 0050 ITA UPS Battery Shared Module User Manual ...

Page 67: ... Electromagnetic interference ESD Electrostatic discharge ECO Economic EOD End of discharge FLP Field lighting power system I O Input output MCB Miniature circuit breaker PE Protective earth PFC Power factor correction POD Parallel power distribution unit RCCB Residual current circuit breaker RCD Residual current detector SPM Server power management system STS Static transfer switch UPS Uninterrup...

Page 68: ...eads by applying a unique combination of industry expertise technology and resources to make the future of our customers enterprises and networks possible While every precaution has been taken to ensure the accuracy and completeness of this literature Emerson Network Power assumes no responsibility and disclaims all liability for damages resulting from use of this information or for any errors or ...

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