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PREMIUM DSP 40-80 KVA PF0.9 3/3 - UPS www.visionups.com

Check the followings
- Parallel or synchron mode selected but parallel data cable unplugged
- Call service

806 Status code

Status

Inverter system fault

Description

In parallel system SLAVE UPS started but the output voltage is not match to my
inverter output voltage

Restart

Restart UPS again

Returning to fault

Directly fault

Check the followings

Check the UPS nominal voltage ratings

Call service

807 Status code

Status

Inverter system fault

Description

In parallel system UPS decided to be master but there is AC voltage at the UPS
output

Restart

Restart UPS again

Returning to fault

Directly fault

Check the followings:
-Turn off all UPSs in parallel system and restart again
-If the code is still showned call service

820 Status code

Status

Inverter alarm

Description

In parallel system while in slave mode , MASTER communication lost for 8
periodes ,inverter stopped

Restart

Wait until UPS provide MASTER communication

Returning to fault

Fault code

821 Status code

Status

Inverter alarm

Description

MASTER syncron failed while SLAVE UPS ,inverter stopped

Restart

Wait until UPS provide MASTER synchronization

Returning to fault

Fault code

822 Status code

Status

Inverter alarm

Description

MASTER frequency exceeded minimum limit ,inverter stopped

Restart

İf master frequency is okay automatic

Returning to fault

Check the followings:
-Check each UPS output frequency selection in parallel system

Содержание Premium DSP

Страница 1: ...User manual Premium DSP 40 80KVA PF0 9 3 phase in 3 phase out Double conversion online UPS ...

Страница 2: ... information in this document is subject to change without notice Thank you for purchasing this series UPS Read this manual carfully before installation This manual provides technical support to the operator of the equipment ...

Страница 3: ...iption of Connection Terminals of the UPS 13 2 7 Battery Installation 14 III FRONT PANEL 18 3 1 Introduction 18 3 2 Front Panel Menu Descriptions 18 3 2 1 MEASUREMENTS menu 21 3 2 2 ALARM LOGS menu 22 3 2 3 INFORMATION menu 22 3 2 4 OPTIONS menu 23 3 2 5 COMMAND menu 25 3 2 6 TIME menu 25 3 2 7 SERVICE menu 25 3 2 8 ADJUST menu 26 3 2 9 User Pasword 26 3 3 Alarms and warning messages 26 3 4 Status...

Страница 4: ... 4 Switching the UPS from a Maintenance Bypass Condition to Normal Operation 53 6 2 UPS Behavior during Mains Outage 53 VII MAINTENANCE 54 7 1 Scheduled maintenance 54 7 2 Daily checks 54 7 3 Weekly checks 54 7 4 Annual Maintenance 55 7 5 Storage conditions and transportation of ups 55 VIII FAULTS AND TROUBLESHOOTING 56 8 1 General Procedure for fault checking and troubleshooting 56 8 2 Before cal...

Страница 5: ... shock Hazardous live parts inside This unit is energized from the battery supply even when the input AC power is disconnected To reduce the risk of electric shock disconnect the UPS from the mains supply before installing a computer interface signal cable Reconnect the power cables only after signaling interconnections have been made CAUTION Units are designed to operate on the concrete floor ABO...

Страница 6: ...batteries keeping the load immune from power disturbances Increased power quality The UPS has its own internal voltage and frequency regulating software which ensures that its output to the critical load is maintained within close tolerances independent of voltage and frequency variations on the mains power lines Fully digital control by three DSP controller for each UPS The UPS is controlled by 3...

Страница 7: ...d supply feature CF 3 1 Double polarity battery with common terminal Automatic and manual battery test and battery temperature compensation features 3 separate maintenance clock counters Battery charge with current limiting Automatic and manual boost charge feature Battery deep discharge protection Temperature protection with 3 separate sensors Interactive communication Diagnostic and settings wit...

Страница 8: ...h Fuse S3 Maintenance Bypass Switch S4 F7 F8 F9 Output Switch Fuse S5 F10 F11 F12 Battery Switch Fuse K1 Rectifier Input Contactor K2 Inverter Output Contactor Rectifier Charger 3 PHASE MAINS I P Battery Dual Polarity Maintenance Bypass Switch Static Bypass S2 F4 F5 F6 S1 F1 F2 F3 S5 F10 F11 F12 S3 S4 F7 F8 F9 Inverter K2 3 PHASE AC Output K1 SB ...

Страница 9: ...ins supply disturbances and black outs when it is connected to either static or maintenance bypass supply 1 2 2 Operating Conditions of UPS UPS may be in one of the following operating conditions A Normal Operation If Mains supply is available All fuses and power switches are closed except the Maintenance Bypass Switch and the load is supplied by the Inverter Output During normal operation the Rec...

Страница 10: ...COM1 RS232 Communation Socket DB9 female Relay Output contacts Batt circuit breaker output and input Generator input Temperature sensor Relay 2 S7 On off switch S5 AC input F10 F11 F12 S1 AC input F1 F2 F3 S3 maintenance by pass S2 By Pass F4 F5 F6 S4 AC output F7 F8 F9 250 Relay 3 SNMP Optional Emergency stop Relay 4 COM2 RS232 Communation Socket DB9 female ...

Страница 11: ...lay 2 Relay 3 Emergency stop Relay 4 COM1 RS232 Communation Socket DB9 female SNMP COM2 RS232 Communation Socket DB9 female Figure 1 3 b 80 kVA switches fuses and interface connections PARALLEL PORT 2 PARALLEL PORT 1 S7 On off switch S5 Battery input F10 F11 F12 S1 AC input F1 F2 F3 S3 maintenance by pass ı S2 By Pass F4 F5 F6 S4 AC output F7 F8 F9 250 ...

Страница 12: ...rance Battery 0 2 Efficiency 100 Load up to 94 Load Crest Factor 3 1 Output Voltage THD linear load 3 Overload 125 Load 10min 150 Load 1min BATTERY Total Number 60 blocks 12V 2x30 serial 60 batteries Float Charge Voltage 250C 405V DC End of Discharge Voltage 300V DC Battery Test Automatic and Manual Boost Charge Available COMMUNICATION INTERFACES RS232 Com Port 2 each standard COM1 and COM2 Extern...

Страница 13: ...ring the shipment If any damage is noted call the shipper immediately and retain the shipping carton and the UPS 2 Carefully open the carton and take the UPS out 3 Retain the carton and packing material for future use Unit package contents 1 A user manual and Guarantee certificate 2 Battery cabinet and or shelf optional 3 Battery connection cables 2 3 Equipment Positioning ATTENTION Units are desi...

Страница 14: ...60 25 25 25 25mm2 terminal block 25mm2 terminal block 80 25 25 25 25mm2 terminal block 25mm2 terminal block NOTES The neutral conductor should be sized for 1 5 times the output bypass phase current These recommendations are for guideline purposes only and are superceded by local regulations and codes of practice 2 5 Safety Earth The safety earth cable must be connected to the earth BUS BAR and bon...

Страница 15: ... AND VOLTAGE DO NOT TURN ON THE BATTERY SWITCH F5 BEFORE STARTING THE UPS 5 Connect the copper earth bus to the safety earth of the mains distribution panel NOTE The earth and the neutral connections must be in accordance with the local rules WARNING Note that the Input Neutral N1 MUST also be connected to K10 terminal 2 6 1 Description of connection terminals of the UPS Figure 2 2 a 40 60 kVA Cab...

Страница 16: ... reasonable temperatures to obtain efficient battery operation In general a minimum space of 10 mm must be left on all vertical sides of the battery block A minimum clearance of 20 mm should be allowed between the cell surface and any walls All metal racks and cabinets must be earthed 1 Unpack each battery and check its terminal voltage with a suitable load Any battery with terminal voltage less t...

Страница 17: ...PREMIUM DSP 40 80 KVA PF0 9 3 3 UPS www visionups com 15 30x12V Batteries 30x12V Batteries 0 360V Nominal 360V Nominal 0 K1 K2 K3 K2 Figure 2 3 External Battery Connections 60x12V ...

Страница 18: ...PREMIUM DSP 40 80 KVA PF0 9 3 3 UPS www visionups com 16 Figure 2 3a DSP0 9 Series 40 60 80 KVA Internal Battery Connections 2x30 60x12V 7Ah ...

Страница 19: ...PREMIUM DSP 40 80 KVA PF0 9 3 3 UPS www visionups com 17 Figure 2 3b DSP0 9 Series 40 60 80 KVA Internal Battery Connections 2x60 120x12V 7Ah two groups of batteries with common point in parallel ...

Страница 20: ...tch L2 Load on bypass indicator lamp L3 Input voltage indicator lamp L4 Rectifier run pilot lamp L5 Battery operation indicator lamp L6 Load on UPS indicator lamp L7 Output switch on indicator lamp There are 5 control buttons on the UPS Front panel ENTER button provides selection decleration up and down buttons provides to surf on menus and buttons are used for adjustments or option selection 3 2 ...

Страница 21: ... DC measurements GENERAL General measurements ENTER EXIT ALARM LOGS UPS LOG RECORD Page1 ENTER CLEAR LOG Page1 INFORMATION RS232 Comm 1 Page1 RS232 Comm 2 Page1 Maximum UPS power Page1 Nominal voltage and frequency Page1 Inverter firmware version Page2 PFC firmware version Page2 Panel firmware version Page2 UPS Model Page3 Communication protocol Page3 Chassis nr Page3 OPTIONS LCD OPTIONS LCD panel...

Страница 22: ...tenance hourmeter Page2 Logout command Page3 ENTER EXIT PASSWORD Getting service code Page1 Type service password Page1 Type user password Page1 ENTER EXIT ADJUST in English Group adjustments Automatic settings Inverter factory options Options list Rectifier factory options Options list Panel adjustments Options list AC input adjustments AC input settings AC Bypass adjustments AC bypass settings A...

Страница 23: ...phase measured AC bypass input voltages FREQ OK 50 0 Hz Measured bypass input frequency MEASUREMENTS INVERTER MENU Level 2 All inverter measurements are located in this menu use up and down buttons to move on submenu MEASUREMENTS INVERTER Level 2 P N L1 L2 L3 Page header V 221 222 223 V Phase to neutral measured AC Inverter output voltages FREQ 50 0 Hz Measured Inverter output frequency MEASUREMEN...

Страница 24: ...rm log records ALARM LOGS Page 1 Level 1 191 03 10 12 14 33 26 Event no date and time up and down buttons move 000 07 12 12 16 58 26 Event no date and time up and down buttons move 001 07 12 12 12 24 26 Event no date and time up and down buttons move ALARM LOGS Alarm Logs PRESS HOLD ENTER FOR 3 SEC TO CLEAR LOGS 3 2 3 INFORMATION MENU Some usefull informations are located in this menu use up and d...

Страница 25: ...Press enter to select LCD backlight brightness adjust BL DELAY CLOSED Backlight delay BL DIM CLOSED Back light half option selection ENTER EXIT ENTER exit to upper menu Up upper line down next line or options ENTER select an option Level 2 Communication options Remote control ON OFF Page1 COM2 port function Page1 SNMP internal external Page1 REPO input ON OFF Page1 RELAY ALARM ASSIGN Page1 ENTER E...

Страница 26: ...menu Up upper line down next line or options ENTER select an option Level 2 Alarm options WARNING INTRVL Page1 WARNING LOG ON OFF Page1 STATUS LOG ON OFF Page1 ALF RESTART USER AUTO Page1 ENTER EXIT Page1 OPTIONS ALARM OPTIONS Page 1 Level 3 WARNING INTRVL 10 sc Warning beep interval adjustment in seconds WARNING LOG ON OFF Press enter to select warning LOG record ON OFF STATUS LOG ON OFF Press en...

Страница 27: ...e alarm buzzer 3 2 6 TIME MENU You can see Time and date information of the RTC in the UPS also you can set date and time from this menu Follow the arrows to set date and time 3 2 7 SERVICE MENU This menu contains some helpfull service information and some commands Use up and down buttons to move cursor on submenu at the end of page you move to next page SERVİCE MENU Page 1 Level 1 HOURMETER 00075...

Страница 28: ...00000 USER PASS 0000 Enter user or service password 3 3 Alarms and warning messages The internal structure of the EF300 Series UPS is modular these are PFC Rectifier module Inverter module Front panel module Module alarms and warnings are cathegorized according to modules at the front of the Alarm or warning message module information is added RXX Rectifier alarms and warnings AXX Inverter alarms ...

Страница 29: ...ensor is defected or not connected R27 BATT TEMP HIGH Warning Battery ambient temperature is high R29 PFC RESET Warning Rectifier module power on R30 PLEASE WAIT Warning Rectifier waits as adjusted startup delay R31 RECTIFIER START Warning Rectifier is in soft start stage Panel module alarm codes L01 TH1 TEMP HIGH Warning TH1 temperature is high L02 TH2 TEMP HIGH Warning TH2 temperature is high L0...

Страница 30: ... discharge A27 GENERATOR MODE Warning Generator set is running A28 O P PHASE LOSS Warning Anyone of the UPS output phases there is no voltage A29 SYNCHRON BAD Warning Inverter is not synchron to by pass input A30 SHORT CIRCUIT Warning Short circuit occured at the UPS output currenty normal A31 OUTPUT SWITCH Warning Output switch of the UPS is off A32 SERVICE LOGIN Warning Service login active A34 ...

Страница 31: ...2 phase longer then allowed time 369 Overcurrent occured on L3 phase longer then allowed time 170 On L1 phase momentary short circuit conditions occured but now inverter is running 270 On L2 phase momentary short circuit conditions occured but now inverter is running 370 On L3 phase momentary short circuit conditions occured but now inverter is running 171 On L1 phase output short circuit occured ...

Страница 32: ...re is only positive alternance at the UPS output 383 L3 phase by pass SCR must be on but there is only positive alternance at the UPS output 184 L1 phase by pass SCR must be on but there is only negative alternance at the UPS output 284 L2 phase by pass SCR must be on but there is only negative alternance at the UPS output 384 L3 phase by pass SCR must be on but there is only negative alternance a...

Страница 33: ...er By pass voltage is OK but at the UPS output there is no 3 phase AC voltage INV Control activity status codes 612 INV Over RS232 interface battery quantity updated 613 INV Over CAN1 interface battery quantity updated 614 INV Over RS232 interface by pass and output frequency updated 615 INV Over CAN1 interface by pass and output frequency updated 616 INV Over RS232 interface By pass and output vo...

Страница 34: ...rator mode start command received 651 INV Over CAN1 interface generator mode start command received 652 INV Over RS232 interface start sleep mode command received 653 INV Over CAN1 interface start sleep mode command received 654 INV Over RS232 interface exit sleep mode command received 655 INV Over CAN1 interface exit sleep mode command received 656 INV Over RS232 interface service login command r...

Страница 35: ... codes 1400 PFC DC bus voltage is higher then R2131 adjustment 1401 PFC DC bus voltage is higher the R2131 adjustment 1402 PFC DC LEM current sensor error 1403 PFC module DC BUS voltage high alarm repeated 4 times within R2166 time window 1404 PFC module DC BUS voltage high alarm repeated 4 times within R2166 time window 1405 PFC board isolated power supply voltage failure 1406 PFC rectifier power...

Страница 36: ... cancel battery test command received 1643 PFC over CAN1 interface cancel battery test command received 1644 PFC over RS232 interface start boost charge mode command received 1645 PFC over CAN1 interface start boost charge mode command received 1646 PFC over RS232 interface stop boost charge command received 1647 PFC over CAN1 interface stop boost charge command received 1648 PFC over RS232 interf...

Страница 37: ...lerance wait until the input frequency is normal R06 OVERTEMPERATURE Overtemperature at rectifier module call service R07 BLACKOUT There is a short blackout at the AC input voltage of the UPS this is temporary wait until the AC input voltage is normal R08 I P OVERCURRENT Call service R09 ROTATE PHASE The phase sequency at the UPS input is reverse please refer to a technical personnel to provide co...

Страница 38: ... battery ambient temperature if hot use air cooling system If batteries are internal check the UPS ambient temperature if normal call service L02 TH2 TEMP HIGH L04 TH2 TEMP LOW UPS TH2 cabinet inside temperature is out of tolerance check the followings If UPS air inlets and outlets covred by dust clean If any material prevents air flow at UPS air inlets or outlets take the material If UPS ambient ...

Страница 39: ...es overload event then current is normal A07 SHORT CIRCUIT There is short circuit at the output of the UPS check installation and loads A08 ON MAINTENANCE The maintenance by pas switch of the UPS is ON 1 position there is a lock on this switch which prevents unauthorized personnel use A09 MANUAL BYPASS Load is transferred to by pass from UPS command menu transfer the load to the inverter A10 BATTE...

Страница 40: ...shown at the end of 10 seconds the mesage will be cleared A26 BATTERY LOW The DC BUS or battery voltage of the UPS is low still UPS is running but DC voltage is going down If this alarm occures during mains failure it means that there is no energy from batteries this is normal But if this alarm occures during mains OKEY call service A27 GENERATOR MODE UPS is running in generator mode when generato...

Страница 41: ...ows us the output current is very high higher then 150 the UPS limited the output current This status is temporary but if continues call service A38 FUSE FAILURE Call service A39 PSP FAILURE Call service A43 USER LOGIN User logged in to UPS this is only warning A45 SERV PASSWORD Call service UPS start impossible ...

Страница 42: ...Redundant UPSs in parallel therefore provides increased reliability for the critical load connected to the parallel system output If power demand increases in a certain UPS application exceeding the power rating of an already installed stand alone UPS a second or more UPS of the same model and power rating can be added in parallel to the existing UPS to increase the output power capacity Schematic...

Страница 43: ...sonnel can access this menu PARALLEL mode This mode is used for operation of at least two 1 1 configuration UPS units connected in parallel for increased reliability If this mode is selected the load is shared equally by each UPS available in the parallel system N 1 numbers of UPS units during normal operation In case of a failure of any one of the UPS units the faulty UPS is isolated from the par...

Страница 44: ...Parallel Port 1 Parallel Port 2 Figure 4 2 c 4 units in parallel All the units must be set for the same operation mode and must have a different UPS number CAUTION You must never set the operation modes of parallel connected UPS units to ONLINE otherwise serious damage may occur in UPSs Figure 4 2 a 2 units in parallel if port2 jumper is not shorted Figure 4 2 DSP0 9 Series Parallel UPS Signal Cab...

Страница 45: ...llel UPS Power Connections BATTERIES U V W N LOAD FUSES AC OUTPUT BYPASS AC INPUT MAIN AC INPUT AC DISTRIBUTION BOARD U1 V1 W1 N1 U2 V2 W2 N2 UPS1 K3 K2 K2 K4 K5 K6 K7 K8 K9 K10 K11 K12 K13 K14 K1 U V W N AC OUTPUT1 BATTERIES UPS2 K3 K2 K2 K4 K5 K6 K7 K8 K9 K10 K11 K12 K13 K14 K1 U V W N AC OUTPUT2 FUSES BATTERIES UPS3 K3 K2 K2 K4 K5 K6 K7 K8 K9 K10 K11 K12 K13 K14 K1 U V W N AC OUTPUT3 FUSES LOAD...

Страница 46: ...on The Operation mode of this UPS is different with MASTER UPS in parallel system Restart Change operating mode and Restart UPS again Returning to fault Directly fault In parallel UPS system master and slave UPS operating modes must be same 803 Status code Status Inverter system fault Description Parallel Operation mode is selected but there is no paralleling board Restart Install parallel communi...

Страница 47: ...Returning to fault Directly fault Check the followings Turn off all UPSs in parallel system and restart again If the code is still showned call service 820 Status code Status Inverter alarm Description In parallel system while in slave mode MASTER communication lost for 8 periodes inverter stopped Restart Wait until UPS provide MASTER communication Returning to fault Fault code 821 Status code Sta...

Страница 48: ... batteries are used at each UPS the battery discharge timebe same for each UPS If the other UPS is continue to run check the batteries of this UPS Call service 825 Status code Status Inverter alarm Description SLAVE DC voltage zone 7 My DC voltage zone 1 inverter down Restart İf mains input voltage is okay automatic Returning to fault Check the followings Check the mains input power of the UPS Che...

Страница 49: ...tatus code Status Inverter warning Description SLAVE UPS L3 phase output is not connected to load Restart 831 Status code causes are valid for L3 phase 841 Status code Status Inverter warning Description MASTER UPS L1 phase output is not connected to load Restart Possible causes of this status code Check L1 phase UPS output fuse Check L1 phase output switch LEG Check the SLAVE UPS L1 phase output ...

Страница 50: ...verter warning Description Enter to sleep mode command received from parallel system Restart Returning to fault 853 Status code Status Inverter warning Description Exit from sleep mode command received from parallel system Restart Returning to fault 854 Status code Status Inverter warning Description REPO remote emergency power off command received from parallel system Restart Returning to fault 8...

Страница 51: ...STER mode started Restart Returning to fault 858 Status code Status Inverter warning Description In parallel system there is no MASTER communication packages output switch turned on after 2 seconds MASTER mode started during on bypass Restart Returning to fault 859 Status code Status Inverter alarm Description In parallel system transfer the load to maintenance bypass command received Restart Retu...

Страница 52: ...switch switch to 1 position 3 Turn on S7 On Off switch to 1 position LCD panel activates and INV RESET or PFC RESET message appears on the display meaning that the rectifier starts to operate 4 Turn ON S4 AC Output switch switch to 1 position 5 A few seconds later red bypass light L2 on front panel turns off and green inverter light L6 turns on L6 light indicates that the UPS has started normal op...

Страница 53: ...4 switches to 0 position In this case bypass voltage is connected directly to the output of UPSs and the critical load is supplied via maintenance bypass switch No AC or DC supply is connected to the inside and the circuits of UPSs 5 2 4 Switching the UPS from a Maintenance Bypass Condition to Normal Operation 1 Turn on S1 AC Input switch to 1 position 2 Turn on S2 Bypass switch to 1 position 3 Tu...

Страница 54: ...put switch to 0 position 2 Turn off S7 On Off switch to 0 position 3 Turn off S5 Battery switch to 0 position 4 Turn off S2 Bypass switch to 0 position 5 Turn off S1 AC Input switch to 0 position After performing the above procedure UPS is completetely shut down In this case PFC rectifier and inverter is not operating and the batteries are not being charged 6 1 3 Switching the UPS from a Normal Op...

Страница 55: ...ecessary loads for that moment But do not turn on these loads again during battery operation After a short period of time when the line voltage is available again UPS returns to normal operation automatically and the alarm message on the display disappears Shut down the critical loads in a period of minimum possible autonomy time depends on the Ah capacity charge status age of the batteries actual...

Страница 56: ...nter as warnings FAN MAINTENANCE counter BATTERY MAINTENANCE counter GENERAL MAINTENANCE counter This type of protective maintenance prevents small problems turning up to big failures DSP0 9 Series UPS has been designed to require very low user maintenance work User should only make below maintenance procedure for long years of trouble free operation 7 2 Daily Checks Observe the UPS daily and chec...

Страница 57: ...authorized service should be done at least two times a year in order to provide safe and efficient operation your UPS and battery group UPS generates a warning message when the maintenance time has expired 7 5 Storage Conditions and Transportation of UPS 1 Check battery charge status by performing a manual battery test before living the UPS in a storage place If charge level is not high enough lea...

Страница 58: ...must be systematically followed while trying to indicate the error Fault determination First step is to record the messages indicator panel LEDs operating parameter values and last status of switches This must be done before Fixing interventions After recording all indications check the meaning of the fault and alarm messages using The operator control indicator panel If anything related follow th...

Страница 59: ...ate Quick BATTERY TEST BATTERY TEST until battery low alarm CANCEL battery test Turn off UPS output voltage immediately SHUTDOWN Turn off UPS output voltage after delay WAITING SHUTDOWN Turn off UPS output voltage SHUTDOWN and turn on UPS output voltage WAITING RESTART CANCEL SHUTDOWN RENAME UPS These commands are evaluated only if REMOTE CNTRL ON option is selected in OPTİONS COMMUNICATION OPTION...

Страница 60: ...m is connected with another phone and listen the modem sound NOTE Not all the modems are compatible with the command set on UPS In such a case modem should be set by connecting a PC 9 3 2 Functioning Principle The remote operator by means of a PC and a modem device and using the remote connection function of the control software calls the UPS through the number to which this is connected The NULL ...

Страница 61: ...put REPO 9 10 External TH1 temperature sensor input 11 12 Function programmable relay contact output 2 13 14 Function programmable relay contact output 3 15 16 Function programmable relay contact output 4 ATTENTION Maximum 42Vac or 60Vac voltage may be applied to the dry contacts of the interface Dry contact relay outputs are NO Normally Open type ie the relay is not activated if alarm is not pres...

Страница 62: ...ficiency Therefore user profits economically as well as supporting to create a cleaner environment and protecting our world sources 2 Every electric powered device is designed appropriate to a defined power level Device capacity should be selected according to its load requirement for an efficient operation 3 Ensure to operate your device in convenient electrical conditions defined in technical sp...

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