"user manual"
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1. S NN N N NN 50 006 1 Ba i M Fig 6 2 Electrical Connection Diagram AC circuit breaker Used as a protective device during electrical connection User equips this device according to maximum output voltage and current um Utility grid Rated grid voltage is 230V Solarlnfologger or User may order it from Sungrow converter device e User equips this device to monitor inverter E PV arrays There are three pairs of input terminals for inverter The allowable maximum open circuit voltage for each PV string is 500V 26 Electrical Connection 6 6 3 Connecting Inverter to AC Grid 6 3 1 AC Side Requirements NOTE Only after receiving prior approval from the local grid company as required should you connect the inverter to the grid Prior to connecting to the utility grid verify whether the grid voltage and frequency are within the range of inverter output parameters referred to Appendix Otherwise consult local grid company for solution AC Side Circuit Breaker An independent two pole circuit breaker for each inverter must be installed at the output side to ensure that the inverter can be securely disconnected under load Inverter Type Specification Recommended of AC Circuit Breaker SG4KTL 31 There are some points that are not allowed for the inverter e itis not allowed for several inverters to use the same circuit breaker e It is not2. Language 0 English 2 Francaise 3 Italia 1 Deutsch Time Date 09 11 18 Time 18 35 55 Energy adj 0000kWh Load default Password 0000 Firmware Version LCD LCD_SG4KTL_V1_B_M DSP DS SG4KTL V1 B Start confermare Com param Address 001 Protocol 0 Modbus 1 Sungrow 24 50 2009 11 17 18 35 gt Run record gt E day 156KWh ENTER ENTER 2009 11 17 15 ENTER 2 Fault record 2009 11 16 8 ENTER Varid zanovlkarid 182A F grid so0Hz P24 50 2009 11 17 18 35 P1 1 Fault rec 2 1 E tot 497600kWh gt 1 gt 2009 11 05 09 15 59 Temp 495 Campi 0001 State Run 2 gt 2009 11 05 09 15 59 Vac high 261V i nn Contrast Adj 50 Language Time ENTER ENTER Start Confirm Eneray adi feso Firmware Version ENTER Auto test Italy j 1 His inform U gt Stat sas ENTER Start Stop gt SBD Set param ___ ENTER Stop ME ED ENTER Standby time 0106 Stop Confirm Recovertime 0305 ENTER Power limit 10096 ENTER ER Power factor 1 000 E day _ 15 6kWWh P ac 4 000kW 1 V dc 3004V dc 13 64 V grid 231 0Vll grid 17 3A i
3. 2 eee e d e et ce e eae etus 46 9 2 3 Battery Malniteriancee cuocere aa nenne eee denne 46 10 Opetation of LCD Menu ana 49 10 1 Description of Button 49 10 2 Operation Mode 50 10 3 Overview of Complete LCD n ent 51 104 The Default SGre ei i iode tee DE Eng tdg ade te E dea da van dee 52 10 5 Contrast Adjustmelt itor nee sale ln 52 10 6 Current Running 53 10 7 Historical Informatior 225 222 2 ee 53 10 71 Running RECI erase ota dedicated ERR EE RO ie 53 MAPA Iro 54 10 8 Language Settings ea en ea oen dd segue v Lo A ed ue be eue d be de 55 10 9 Time Settings eee ee LE 55 10 10 Deviation of E tot 56 10 Load Detault RS 57 10 12 Firmw are Version sur eti ot decet e th caos t ned o ot ee oet cae a eoe be dite eae 57 10 13 Auto test Only for Haly e ei ebd a vty t nn 58 10 14 Running Parameters nnn nnns 59 10 15 Protective Parameters 59 10 16 Communication Parameters 61 10 16 1 A
4. 6 5 PV System Grounding Because of the transformer less design of the inverter neither the DC positive pole nor DC negative pole of the PV strings can be grounded All non current carrying exposed metal parts ofthe equipment and other enclosures in the PV power system should be grounded e g PV arrays frame and inverter enclosure Where there is only one inverter in the PV power system connect PE cable to the installation ground Where there are multiple inverters in the PV power system connect PE cables of all inverters and mounting frame of PV arrays to the same copper bus bar In this way they are in equipotential connection Inverter 1 Inverter 2 Inverter n Lo TEE T PV Arrays 1 j IT PV Arrays 2 l 1 L M7 Ss LE PV Arrays HE Mounting Frame of PV arrays Copper Bus Bar Grounding Electrode Grounding of PV Power System L N AC Circuit Breaker Inverter t AC Grounding Electrode Grounding of Inverter AC Side Fig 6 3 PV Power System Grounding SG2K5TL SG3KTL SG4KTL 31 User Manual 6 6 Communication Connection 6 6 1 Communication Types Inverter may transfer the monitored information from inverter via its integrated RS485 interfac
5. If the conditions are OK inverter feeds AC power to grid and enters into the running state 4 Observe state of LED indicators and LCD screen NOTE If inverter s commissioning fails FAULT indicator will be lit And on the LCD screen will display type of malfunction In this case malfunction must be removed and then repeat 1 to 4 If inverter s commissioning succeeds RUN indicator will be lit E3 on the LCD screen will display RUN 40 Disconnection of Inverter For maintenance work or any service work inverter must be switched off In normal operation switching off is not necessary In order to disconnect the inverter from the AC and DC power sources you should proceed with the following procedures Otherwise you will be exposed to lethal voltages or the inverter will be damaged 1 Disconnect the external AC circuit breaker and prevent it from connecting again 2 Rotate the DC switch to the OFF position A NOTICE Please strictly follow the sequence of the above procedures Otherwise it will lead to unrecoverable inverter damage 3 Wait about ten minutes until the capacitors inside the inverter have discharged 4 Measure to confirm AC output of inverter at the AC circuit breaker is voltage free 5 Pull AC connector out of the inverter 6 Release the locking part of DC connectors by pressing on the ribbing of the locking hooks with nipper pliers and pull outwards 41 SG2K5TL SG
6. e Le Ds eed deed 7 22 Product Description red erede miete 8 2 21 8 2 2 2 Dimensions Weight 9 22 3 LCD Display P nel 2 22 22 242248 reet n ei ee dr ees 9 224 e tue eat ie etant Ads o ge ee eras 10 2 3 Technical Description nin euren obtener e dense 11 2 331 Principle Description Let e Hess eure ed 11 2 32 Functions Descriptor e ce ee te e ate e Ges aerial aes 11 3 Workflow about Inverter san 13 4 Unpacking and Storage ni pte E ERE irpo 15 4 1 Unpacking and Inspection 15 42D visionum 16 4 3 Delivery Cortents 1 5 nit ete RU ye ER dt e iot et era 17 4 4 Storage of Inverter 1 aee noe Ri eed eg guod eed ce E 18 5 Installing Inverter onto Wall asian 19 5 1 Selecting Installation 19 5 2 Moving Inverter to Installation 22 5 3 nstallation Procedure rtt ede tat er rin 23 6 Electrical Connechon an Ekel 25 6 1 Terminals Description e ee i E HI RE Ian 25 6 2 Simplified Electrical Connection 26 6 9 Connecting Inverter to AG Grid
7. Commissioning Troubleshooting er No Success Y N C End Fig 3 1 Installation Flow Chart 13 SG2K5TL SG3KTL SG4KTL 31 User Manual Table 3 1 Description of Installation Flow os Moving the inverter to installation site Section 5 2 Install the inverter against the chosen wall Section 5 3 7 Electrical connections include DC AC ground and Section 6 3 6 6 communication optional connection Examine before commissioning Section 7 1 CEN Start up inverter and configure corresponding parameters Section 7 2 Troubleshooting Section 9 1 14 Unpacking and Storage 4 1 Unpacking and Inspection The unit is thoroughly tested and inspected strictly before delivery Although sturdy packaging is used damage may still occur during shipping Check the packing for any visible damage upon receiving Check the inner contents for damage after unpacking Check the completeness of delivery contents according to the supplied packing list If there is visible damage to the packaging or the inner contents or if there is something missing contact the unit dealer Do not dispose of the original packaging It is the best choice to store the inverter by re using the original packaging 186 i i H 715 Fig 4 1 Single Inverter in Original Carton and Wooden Crate unit mm 15 SG2K5TL SG3KTL SG4KTL 31 User Manual 4 2 Identifying Inv
8. parameters the corresponding frequency range for different countries can be found in Table 10 3 ask utility grid company for solution 3 If the grid voltage is within the permissible range contact Sungrow service dept Contact Sungrow service dept for solution 1 Check whether AC circuit breaker is triggered 2 Check whether AC cables are all firmly Troubleshooting 9 Fault Code Cause Troubleshooting connected 3 Check whether grid is not on service 4 If all conditions are OK and this malfunction still occurs in the LCD screen contact Sungrow service dept for solution Temp flt The ambient temperature 1 The installation site may not be optimal inverter is too high 2 There may be too much dirt on the fans 3 Check that there is abnormal noise of fans Otherwise please replace broken fan only for SGAKTL 31 4 There may be something covering heat sink 5 If the fault still exists contact Sungrow service dept DC inject DC components of inverter Contact Sungrow service dept for solution output current is too high Earth ft Earth fault happens Contact Sungrow service dept for solution Samp ft There may be malfunction of Contact Sungrow service dept for solution sample circuit Bus high The Bus voltage exceeds limit 1 Restart the inverter through LCD command 2 If the fault still exists contact Sungrow service dept Bus low The Bus voltage is too low 1 Restart the inve
9. 1 Press ENTER to enter general control screen from the default screen 2 Press V to navigate arrow pointer to Set param and then press ENTER 3 Press gt to move cursor to the right and press button V to set password 1111 4 Press ENTER to confirm command 5 Press V to navigate arrow pointer to Pro param and then press ENTER 59 SG2K5TL SG3KTL SG4KTL 31 User Manual 6 Input the password that be acquired from Sungrow 7 Choose the corresponding country code of the inverter installation country If the inverter installation site is not included in the following list installer should choose item Other and manually set corresponding protective parameters according to the following table Country setting 0 GB 1 DE 2 FR 3 IT 4 ES B AT 6 AU 7 CZ B BE 9 Other Table 10 3 Range of Protective Parameters Great Britain SG2K5TL 31 SG3KTL 31 Other 230V 276V 184V 230V 50Hz 53Hz 47 50Hz Default 264V Default 184V Default 51 5Hz Default 47 5Hz 60Hz 63Hz 57Hz 60Hz Default 61 5Hz Default 57 5Hz If the inverter installation country is not included in installer should choose Other and set corresponding protective parameters according to the inverter installation country requirement not exceeding ranges in the above table 1 Press gt to move arrow to item Other and press button ENTER to confirm selection 60 Operation of LCD Menu 10 2 Press gt to
10. Fgid s0 0H2 Pra peraih ENTER Temp 495C ENTER p Y Password 000000 E tot 497600KWh CO2reduce 29760kg E month 450kWh T tot 156700h T day 246min gt l Set param Sys param ENTER Power Curve CANO i es Address 10 09 11 18 Password 0000 ENTER Com param ENTER Protocol 0 0V Vnorm 0 0V Ttrip 0000ms Mgrid min 0 0V Vnorm 0 0V 00005 Fgrid max 0 0Hz Fnorm 0 0Hz 0000ms Fgrid min 0 00Hz Fnorm 0 00Hz 0000ms Fig 10 1 Menu Tree 51 SG2K5TL SG3KTL SG4KTL 31 User Manual 10 4 The Default Screen The LCD is initialized upon energized of inverter and then enters into the default menu Current date and time are also displayed 4 000 kW 15 6 kWh 497600 kWh t 2009 11 18 18 35 NOTE P ac the current output power of inverter E day generated energy in the current day E tot the overall accumulative generated energy State the inverter s operation mode If there is no button operation in two minutes it will go back to default screen 10 5 Contrast Adjustment 1 Press ESC to enter into contrast adjustment screen 2 Press V to increase the setting value and press gt to
11. Grid DANGER Make sure that all the DC and AC cables to the inverter are not live before you start the electrical work Connect the inverter exclusively to TN or TT mains as the following procedures 1 Disconnect AC circuit breaker and prevent it from reconnection inadvertently 2 Plug AC connector into corresponding AC terminal underneath the inverter 3 Connect PE cable to the grounding electrode Where there are multiple inverters in the PV power system connect PE cables of all inverters and mounting frame of PV arrays to the same copper bus bar which may establish equipotential connection 4 Connect phase cable and N cable to the AC circuit breaker 5 Check whether cables are firmly secured NOTE No consuming load may be connected to power supply cables from the inverter to the AC circuit breaker In addition ensure that the ground cable is laid as far away from and not directly in parallel to the power supply cable DANGER Danger to human life due to high voltage existing inside the inverter Do not turn on the AC side circuit breaker until all inverter electrical connections have completed 31 SG2K5TL SG3KTL SG4KTL 31 User Manual 6 4 Connecting Inverter to PV Arrays DANGER Lethal voltage exists PV arrays produce electrical energy when exposed to light and thus can create an electrical shock hazard Wiring of the PV arrays should only be performed by qualified personnel Prior to conn
12. allowed to connect loads between inverter and circuit breaker Residual Current Device With an integrated universal current sensitive residual current monitoring unit inside the inverter is able to distinguish the fault currents from normal capacitive leakage currents The inverter will disconnect immediately from mains as soon as a fault current of more than limit value has been detected However if an external RCD or residual current breaker is mandatory the switch must trigger at a failure current of 100mA or higher Requirements of Inverter Parallel Grid Connection If several inverters are operated in parallel connection to grid there are different requirements according to different scenarios 27 SG2K5TL SG3KTL SG4KTL 31 User Manual Scenario 1 Several inverters are operated in parallel connection to the single phase Low Voltage grid Inverter 1 Inverter 2 Inverter n Requirements The sum of all inverters in parallel connection is limited to THIRTY Scenario 2 Several inverters are operated in parallel connection to the three phase Low Voltage grid 1 12 e lt Inverter 2 Inverter n L1 Inverter 1 Inverter 1 Inverter 1 Es Inverter n L2 Inverter 2 Inverter n L3 Inverter 2 Requirements The sum of all inverters in parallel connection is limited to
13. iib eter tete pelea teta re ele drip Re E Rea 27 6 3 1 AC Side Requirements 27 6 3 2 Assembling AC Connector with eene 29 6 3 3 Connecting Inverter to AC 31 6 4 Connecting Inverter to PV Arrays 32 6 4 1 Assembling DC Cable to 32 6 42 Wiring Precedures cite ii rA bance wath binc 34 6 5 PV System Grounding 35 6 6 Communication 36 6 6 1 COMMUNICATION TYPOS ave 2 core een ern 36 6 6 2 RS485 Communication 36 7 CODiDIsSIODIDBP sans near 39 7 1 Verify before Commissioning seen eene nemen nennen nennen 39 7 2 Commissloning Procedures eet eoe optet uin 39 8 Disconnection of Inverter Ran 41 9S Troubleshooting uode nie catt eu 43 9 1 Troubleshooting of LED enm emm 43 9 1 1 Troubleshooting of LED Indicator ssssseeeneeeneenem nemen 43 9 1 2 Troubleshooting of Faults in LCD Screen 44 92 Maintenance n Norte LUN Ed 46 921 Cleaning the Cabinet cii RR RIA ERREUR R RERO R IRA IRR 46 9 22 Cleaning the Heat SInk
14. move cursor and Press to select values press button ENTER to confirm value settings 3 Press button ENTER to confirm protective parameters settings Country setting Vgrid max Bev N Mes Vgrid mi 184V A 2 FR 3 IT ENTER gria min ENTER pi din A 4 ES 5 AT Fgrid max 50 30Hz set it 6 AU 7 CZ Fgid min 49 70Hz 8 BE E Other 10 16 Communication Parameters Settings If there is more than one inverter to communicate with a PC or a data logger it is crucial to configure communication parameters of each inverter You can set address for inverters and choose the communication protocol as the following indications The default protocol is Modbus protocol If there are several inverters to communicate with a PC or a data logger address of every inverter should be different with each other and the default baud rate 9600 of every inverter is identical 10 16 1 Address Settings 1 Press ENTER to enter general control screen from the default screen 2 Press V to navigate arrow pointer to Set param and then press ENTER 3 Press gt to move cursor to the right and press button to set password 1111 Press ENTER to enter into parameters settings 4 Press V to navigate arrow pointer to and then press ENTER 5 Press V to navigate arrow pointer to Address and press ENTER 6 Press gt to move right and press button V to set address Press ENTER to conf
15. personnel They have e been trained specially e already completely read through and understood the manual and other related documents been familiar with safety requirements for electrical system Technical personnel mentioned above may perform the following work SG2K5TL SG3KTL SG4KTL 31 User Manual Install the inverter onto the wall Connect inverter into the PV power system Connect other devices into the PV power system Commission the inverter e Maintain and service the inverter Before Installation There is a risk of injury due to improperly handling the device e Always follow the instructions contained in the manual when moving and positioning the inverter The weight of the equipment can cause injuries serious wounds or bruising if it is not handled correctly During Installation Prior to installing the inverter onto the wall it is crucial to make certain that the inverter is not electrically connected System performance loss due to bad ventilation The equipment requires good quality ventilation during operation It is essential to keep the unit upright and nothing covering the heat sink in order to ensure that the equipment interior is well cooled down During Electrical Connection DANGER Lethal voltage exists PV arrays will produce electrical energy when exposed to sunlight and thus can create an electrical shock hazard e Wiring of the PV arrays should only be performed by
16. protective functions of inverter are valid 58 Operation of LCD Menu 10 10 14 Running Parameters Settings 1 Press ENTER to enter general control screen from the default screen 2 Press V to navigate arrow pointer to Set param and then press ENTER 3 Press gt to move cursor to the right and press button V to set password 1111 4 Press ENTER to confirm command 5 Press V to navigate arrow pointer to Run param and then press ENTER 6 Press gt to move right and press V to configure running parameters Standby time 010s Recover time 030s Power limit 10096 Power factor 1 000 NOTE Standby time is the time from inverter starting to initialize to inverter feeding power to grid This parameter ranges from 10s to 255s And the default value is 10s Recover time is the time from the point that the fault is cleared to inverter recovering to feed power to grid It ranges from 30s to 300s And the default value is 30s Power limit ranges from 0 to 100 10 15 Protective Parameters Settings These protective parameters are designed for the limit value that can trigger the protective functions of the inverter In order to ensure realization of protective function these protective parameters have been configured before delivery according to different countries grid requirements There is password only for installer to configure parameters and the password can be acquired from Sungrow
17. qualified personnel e modules should be covered by opaque materials during wiring Safety Instructions 1 All cables must be firmly attached undamaged properly insulated and adequately dimensioned During Inverter Operation DANGER There is a risk of inverter s damage or personal injury Do not disconnect DC connectors while the inverter is under AC load First de energize the equipment from dual power sources and verify that there is no voltage present There is a risk of burn Prevent from touching device hot parts such as heat sink during operation Only LCD display panel and DC switch can be touched during inverter operation Maintenance and Service A NOTICE Any malfunction that may impair inverter safety functions must be repaired immediately before the inverter is restarted again Inverter contains no owner serviceable parts inside Please contact local authorized personnel if any service work is required NOTE Servicing of the device in accordance with the manual should never be undertaken in the absence of proper tools test equipments and the more recent revision to the manual which is clearly and thoroughly understood SG2K5TL SG3KTL SG4KTL 31 User Manual DANGER There is a risk of inverter damage or personnel injury due to incorrect service work Always keep in mind that inverter is power supplied by dual power source PV arrays and utility grid Before any service work you s
18. the equipment unless it has been secured to the wall firmly 22 Installing Inverter onto Wall 5 5 3 Installation Procedure Inverter is installed onto the wall by means of backplate in the packaging If you don t use the supplied backplate you can drill holes refer to its dimension below 268 228 134 21 e 30 104 104 6 9 S N 80 M10 Fig 5 1 Dimensions of Backplate and Fastener unit mm In the following pages we will introduce how to install the inverter onto the wall using the provided backplate Concrete Wall 1 Remove backplate and expansion bolts from the packaging 2 Place the backplate onto the chosen concrete wall and adjust it until it is in a horizontal position 3 Mark the positions to drill holes using the backplate as the template 4 Drill holes according to the marks you have made 23 SG2K5TL S G3KTL S G4KTL 31 User Manual Mark positions Drill holes DANGER In order to avoid electrical shock or other injury inspect existing electronic or plumbing installations before drilling holes 5 Attach the backplate to the wall with the supplied expansion bolt set The torque for fastening the nut should be at least 35 Nm 6 Lift up the inverter above the backplate and then slide down making sure that the two mounting ears on the back of the inverter and counterparts of the backplate engage p
19. 16 Unpacking and Storage 4 4 3 Delivery Contents Fig 4 3 Delivery Contents 17 SG2K5TL SG3KTL SG4KTL 31 User Manual 4 4 Storage of Inverter Where the inverter may not be installed immediately or inverter needs to be stored under certain condition store the unit as the following indications The unit must be packed into original carton and desiccant must be left inside If the original packaging is not accessible an equivalent carbon which is able to support the unit weight and size can be used The packing should be sealed by adhesive tape The unit must be stored in a clean and dry place to protect against dust and moisture The storage temperature should be always between 25 C 60 C And the storage relative humidity should be always between 0 and 95 It is very important to keep the packing away from chemicals Otherwise it will lead to corrosion During the storage time periodically check any visible damage by rats and other rodents Replace the packaging if necessary The packaging should be kept upright If there is more than one inverter to be stored the maximum layers for original carton is three After long term storage local installer or service dept of Sungrow should perform a comprehensive test before connecting the inverter into PV power system 18 Installing Inverter onto Wall Installation shall comply with local regulations and technical rules I
20. 3KTL SG4KTL 31 user Manual Press the ribbing Pull outwards Disconnect DC connectors Troubleshooting 9 1 Troubleshooting of LED Indicator 9 1 1 Troubleshooting of LED Indicator LED indicators 1 The polarity of DC cables is 1 Disconnect inverter from its dual power and LCD cannot opposite supplies be turned on 2 The DC input voltage is too 2 Check the polarity of DC input slow or there is no DC input Reconnect DC cables if necessary voltage 3 Wait for DC voltage to return to the operating voltage 4 If the phenomenon still exists contact Sungrow service dept RUN indicator DC voltage supplied is not 1 Wait for DC voltage to return to the and LCD turn on stable operating voltage and turn off after a while irregularly 2 If the phenomenon still exists contact Sungrow service dept RUN indicator There is not sufficient DC 1 Wait for DC power to recover flashes regularly power 2 If the phenomenon still exists contact Sungrow service dept RUN indicator Inverter may be in standby 1 Wait a while for inverter entering into goes out startup or key stop state Run state 2 Perform start command in the LCD Screen 3 If the phenomenon still exists contact 43 SG2K5TL SG3KTL SG4KTL 31 User Manual Phenomenon Fault indicator is on Causes There exists a malfunction that not been cleared off Troubleshooting Perform troubles
21. A Ei Max Input Voltage 500V Min Input Voltage 150V Start Voltage 170V Number of MPP Trackers Strings Per MPP 1 Tracker AC SIDE DATA Nominal AC Power Max Output Current Rated Output Voltage Output Voltage Range 184 276Vac Rated Output Frequency 50Hz 60Hz Output Frequency Range 47Hz 53Hz 57Hz 63Hz Output Current THD lt 3 at nominal power DC Current Injection 0 596 of rated inverter output current Power Factor 20 99 at nominal power 63 System IP65 Other IP65 fm sw RN i Peso em Cooling Method natural cooling controlled forced air cooling Relative Humidity 0 95 non condensing Max Working Altitude 2000m DC Switch Optional Dimensions W x H x D 420x555 x179 mm 64 Temperature Derating Curve Pnom P U 0 2 _ gt 45 60 Ambient temperature C 65 Exclusion of Liability The content ofthese documents is periodically checked and revised when necessary please call us or check our website www sungrowpower com for the latest information However discrepancies cannot be excluded No guarantee is made for the completeness of these documents Please contact our company or distributors to get the latest version Guarantee or liability claims for damages of any kind are excluded if they are caused by one or more of the following Improper or inappropriate use or install of the product Installing or operating th
22. LCD screen will go out to save power if there is not button operation in one minute You can activate it by pressing any button 49 SG2K5TL SG3KTL SG4KTL 31 User Manual 10 2 Operation Mode of Inverter e Stop The inverter is shut down e Stand by Stand by mode is entered for insufficient input power During stand by mode the inverter will wait until the DC voltage recovers to 150V in standby time set by user see 10 14 Running Parameters Settings e Startup The inverter is initializing and synchronizing with the grid e Run After being energized the inverter tracks the PV arrays maximum power point and converts DC power to AC power This mode is the normal operation mode Fault If a fault occurs during operation the inverter will automatically stop operation trigger AC relay and display the fault type in the LCD panel with LED Fault lit Once the fault is removed in recover time set by user see 10 14 Running Parameters Settings the inverter will automatically resume running Key stop The inverter will stop operation by manual stop in LCD menu This condition needs manually start to restart Com err LCD screen can not communicate with DSP LED indictors are not turned on 50 10 Operation of LCD Menu 10 3 Overview of Complete LCD Menu
23. SUNGROW CL SG2K5TL SGSKTL SG4KTL 31 PV Grid Connected Inverter User Manual SG2K5 3K 4KTL 31 UEN Ver10 201112 Version 1 0 About This Manual This manual is for the inverter SG2K5TL 31 SG3KTL 31 and SG4KTL 31 These inverters are grid connected transformer less robust and of high conversion efficiency The device will bring you more profits from PV power system Aim The manual contains information about the inverter which will provide you guidelines to connect the inverter into the PV power system and operate the inverter Related Documents The manual cannot include complete information about the PV system You will get the additional information about other devices at www sungrowpower com download or via webpage of device manufacturer Target Group The manual is targeted to technical personnel who is responsible for inverter installation and commissioning in the PV power system and inverter owner who will perform daily LCD operation How to Use This Manual Read this manual and other related documents before any work with the inverter Documents must be stored carefully and available at all times The contents of the manual due to the product development will be periodically updated or revised It is probably that there are changes of manual in subsequent inverter edition The latest manual can be acquired via visiting the web page www sungrowpower com Symbols Explanation Important instructions contained
24. TL 31 420 555 179 SG3KTL 31 420 555 179 20 SG4KTL 31 420 555 179 20 2 2 3 LCD Display Panel As a friendly human computer interaction interface LCD display panel comprises LED indicators buttons and LCD display screen on inverter front panel e LEDs indicate the working status of the inverter The current running information shown on the LCD display SG2K5TL SG3KTL SG4KTL 31 User Manual e Malfunction records shown on the LCD display Inverter configuration by pressing the buttons E 1 IRUN fo i FAULT Lo Fig 2 4 LCD Display Panel LED indicators RUN and FAULT Inverter working status can be known from the 2 two indicators Detailed definition is shown in Table 2 2 LCD Screen LCD screen can display the current state of inverter current running information history information and parameters to be set Buttons Navigate in the LCD menu select values and so on Detailed functions are shown in Table 10 1 Table 2 2 Description of LED Indicator Inverter is feeding AC power to the utility grid FAULT off 3 RUN off A malfunction happens FAULT on Or a protection function is activated RUN off Inverter is not energized FAULT off There is communication error between DSP and LCD 2 2 4 DC Switch DC switch is designed for safely disconnecting the DC current if required The inverter works a
25. ambient temperature 60 C exceeds 45 C the power output will reduce Min ambient temperature 10 The relative humidity of chosen installation site ee 25 C should never exceed 95 Moisture may result in 4 corrosion and damage to the inner electronic Max relative humidity components 95 No condensing 11 Do not expose the inverter to the direct sunlight Otherwise inverter will not operate normally Meanwhile avoid exposing to rain or snow to extend its service life despite of IP65 protection degree Shaded site of the building will be better 20 7 UN Expose to direct sunlight x Expose to rain X Expose to now 12 Take enough space for convection into consideration during installing multiple inverters 13 Do not install the inverter in a closed cabinet Otherwise the inverter will not operate normally 21 SG2K5TL S G3KTL S G4KTL 31 User Manual 5 2 Moving Closed Cabinet 14 Do not install inverter where children can reach 15 Do not install inverter in living area Noise can be produced during running of inverter which may affect your daily life Inverter to Installation Site If the inverter is to be installed remove the unit from the packaging and move it to the chosen installation site During the moving process the instructions below should be obeyed 1 Remember the weight of inverter 2 Grasp the equipment with both hands by means of handles 3 Do not release
26. and PE And feeding power is always single phase via AC terminal at the bottom of the unit AC Cable Requirements Select AC cable specifications and type considering the following facts 1 The grid impedance of the AC cable must correspond to the specification to avoid unintended disconnection from the grid or derating of the output power N SG2KSTL 31 SG3KTL 31 SGAKTL 31 2 Cross section of AC cables should be selected considering power loss not exceeding 1 The recommended cross section is 4mm 3 Withstand ambient temperature 4 Layout type inside wall underground free air etc 5 UV resistance and so on 29 SG2K5TL SG3KTL SG4KTL 31 User Manual Assembling Procedures 1 Strip off insulation layer of AC cables The length of strip insulation is about 10mm P 2 Insert AC cables through cable gland and threaded sleeve 3 Fix all cables ends to the corresponding terminals with the torque of 1Nm according to markings on the connector especially PE cable Observe the pin assignment of AC connector If a phase wire is connected to the PE terminal it may permanently destroy the inverter Cable gland 4 Pull cables outwards slightly to confirm whether they are installed firmly 5 Plug the threaded sleeve into the front connector 6 Screw cable gland to the threaded sleeve with tightening torque 2 5Nm 30 Electrical Connection 6 6 3 3 Connecting Inverter to AC
27. ared off And all parameters not including protective parameters and time will return to the default values 1 Press ENTER to enter general control screen from the default screen 2 Press V to navigate arrow pointer to Set param and then press ENTER 3 Press gt to move cursor to the right and press button V to set password 1111 And press ENTER to enter into parameters settings 4 Press V to navigate arrow pointer to Sys param and then press ENTER 5 Press V to navigate arrow pointer to Load default and then press ENTER 6 Press gt to move right and press V to input the password 1111 7 Inverter will begin to return to the factory value after pressing ENTER Load default Password 0000 10 12 Firmware Version 1 Press ENTER to enter general control screen from the default screen 2 Press V to navigate arrow pointer to Set param and then press ENTER 3 Press gt to move cursor to the right and press button to set password 1111 And press ENTER to enter into parameters settings 4 Press V to navigate arrow pointer to Sys param and then press ENTER 5 Press V to navigate arrow pointer to Firmware Version and then press ENTER to get the version information Firmware Version LCD LCD SG4KTL V1 B M DSP DSP SGKTL V1 B 57 SG2K5TL SG3KTL SG4KTL 31 User Manual 10 13 Auto test Only for Italy Inverter provides for Italian auto test operation to verify the validity of functi
28. ble gland Plastic ring Shielding Ethernet cable Corresponding Relationship Between Cables and Pins Pin 1 White orange Pin 2 Orange Pin 3 White green Pin 4 Blue Pin 5 White blue Pin 6 Green Pin 7 White brown Pin 8 Brown 3 Pull cables outwards to confirm whether they are fastened firmly 4 Insert the RJ45 plug into the front plug connector until it makes a clicking sound 5 Tighten the cable gland with appropriate torque Front connector Cable gland 6 Now perform RS485 communication connection as the diagram shown below Connect connector of one cable end to RS485 terminal on the bottom of the inverter Make connector and RS485 terminal engage and rotate clockwise about 60 degrees Connect the other end of cable to other devices Communication terminal definition is referred to device manual READS Solarlnfo Logger RS485 Solarlnfo Logger PC i Green Shielding layer is grounded Ene RS485 232 converter PC ee Communication of single inverter Fig 6 4 One Inverter Connected to PC or Solarlnfo Logger 37 SG2K5TL SG3KTL SG4KTL 31 User Manual Inverter Inverter Inverter Solarinfo Logger RS485 Solarinfo Logger PC pe Shielding layer is grounded 5485 232 converter RS485 RS232 RS232 Multiple inverters in daisy chain Fig 6 5 Multiple Inverters Communication with Other Devices 7 Verify the communi
29. cation connection and configure communication parameters NOTE If there is more than one inverter to communicate with a PC or a data logger it is crucial to configure communication parameters of each inverter See 10 16 Communication Parameters Settings Solarlnfo logger and RS485 232 converter are optional parts and can be ordered from Sungrow 38 Commissioning 7 1 Verify before Commissioning Before starting up the inverter you should check the following items for requirements 1 Inverter unit is accessible for operation maintenance and service 2 Re check that the inverter is firmly installed on to the wall 3 Room for ventilation well is provided for one inverter or more than one inverter 4 There is nothing left on top of the inverter heat sinker 5 Inverter and accessories are correctly connected 6 Cables are routed in safe place or protected against mechanical damage 7 Specification of AC circuit breaker is reasonable 8 Terminals not used underneath the inverter are sealed 9 Warning signs amp labels suitably affixed and durable 7 2 Commissioning Procedures 1 Make sure all items above meet demands 2 Close external AC circuit breaker 3 Rotate DC switch to the ON position Provided that there is sufficient sunlight PV arrays initialize and supply DC power to inverter 39 SG2K5TL SG3KTL SG4KTL 31 User Manual DC bus starts to charge and check the state of utility grid
30. ddress Settings eene et eet c nk en I ans 61 10 162 Protocol Setting Seesen are aii dee uc ue ic e ede ne d 62 10 17 Inverter Start and 62 APPENDR NER EEG 63 Electrical Specifications 63 Temperature Derating Curve detiene diete ebd ters 65 ExclusionmotEIabllity 5 eei oett iita ife e hse cid 66 About Uscite intem pitt een npa mt etenim edes 67 Safety Instructions IMPORTANT SAFETY INSTRUCTIONS SAVE THESE INSTRUCTIONS Inverter SG2K5TL 31 SG3KTL 31 and SGAKTL 31 have been designed and tested strictly according to the international safety regulations However for electrical and electronic equipment safety instructions related to electrical device must be complied with during installation commissioning operation and maintenance Operation or work performed incorrectly may result in damage to The life and well being of the operator or a third party inverter and other properties that belong to the operator or a third party Therefore in order to reduce the risk of personal injury inverter damage or other properties damage the following general safety instructions must be read and always kept in mind prior to any work All detailed work related safety warnings and notes will be specified at the critical points in corresponding chapter All installation and electrical work must only be performed by qualified
31. decrease the value Contrast value ranges from 0 min to 100 max PEFETTTEUETTTTTETEEETET ETE LETT TT Contrast Adj 50 52 Operation of LCD Menu 10 10 6 Current Running Information 1 Press ENTER to enter general control screen from the default screen 2 Press V to view current running information And press V to go to the next page E day 15 6kWh E tot 497600kWh P ac 4 000kW CO2 reduce 29760 V dc 300 4V I de 13 6A E month 450kWh V grid 231 0V l grid 17 3A T tot 156700h F grid 50 0Hz T day 246min Temp 49 5 C V dc PV arrays input voltage I dc PV strings input current V grid Grid voltage I grid Grid current F grid grid frequency CO2 reduce reduced CO2 weight Temp Current ambient temperature E month Accumulative generated energy in current month T tot Accumulative running time T day Running time in current day 10 7 Historical Information 10 7 1 Running Record Inverter stores the running information every fifteen minutes during running User can look up the historical running records following the procedures below 1 Press ENTER to enter general control screen from default screen 2 Press V to navigate arrow pointer to His inform and press ENTER 3 Press V to navigate arrow pointer to Run record and then press ENTER 4 Press V to navigate arrow pointer to the time to look up and pres
32. e product in an unintended environment Installing or operating the product when ignoring relevant safety regulations in the deployment location Ignoring safety warnings and instructions contained in all documents relevant to the product Installing or operating the product under incorrect safety or protection conditions Altering the product or supplied software without authority The product malfunctions due to operating attached or neighboring devices beyond allowed limit values In case of unforeseen calamity or force majeure The use of supplied software produced by Sungrow Power Supply Co Ltd is subject to the following conditions Sungrow Power Supply Co Ltd rejects any liability for direct or indirect damages arising from the use of the Solarlnfo software This also applies to the provision or non provision of support activities Using the Solarlnfo software for commercial purposes is prohibited Decompiling decoding or destroying the original program including Solarlnfo software and the embedded software is prohibited 66 About Us Sungrow power supply is a China leading manufacturer of various power electronics products for renewable energy generation systems Our products include converters inverters battery chargers and other power supplies for distributable generation system in both grid connected and stand alone applications The power rating of Sungrow products covers from several hundred watt to large mega wa
33. e to a PC with monitoring software such as Solarlnfo Insight or to data logging device such as Solarlnfo Logger Where there is only one inverter a RS485 cable with RJ45 connector enables connection between inverter and PC Where there is more than one inverter all inverters can be connected to PC in daisy chain The first inverter in the chain must be terminated with a resistor of 120 Ohm And shielding layer of RS485 cable should be single point grounded Aconverter such as RS485 232 converter or Solarlnfo Logger which converts 485 to 232 signal is needed between inverter and PC 6 6 2 RS485 Communication Connection RS485 is the standard communication choice for inverter The maximum number that inverters are connected in the daisy chain depends on converter and other factors Please refer to converter s manual to obtain the limit RS485 terminals on the bottom of the inverter are RJ45 sockets First prepare communication cable and RJ45 plug Meanwhile to guarantee inverter protection degree there are waterproof communication connectors supplied in the scope of delivery RS485 cable requirements to ensure quality of communication e Shielding Ethernet cable e Twist pair type 1 Lead shielding Ethernet cable through cable gland and inner rings 2 Use the Ethernet crimper to crimp the cables and connect cables to RJ45 plug according to TIA EIA 568B 36 Electrical Connection 6 RJ45 plug 77 Ca
34. ecting PV array to inverter the following specifications of PV arrays should be met Type DC Power Limit Open circuit Voltage Short circuit Current Limit SG3KTL 31 3 3kW SGAKTL 31 4 4kW A NOTICE There is a risk of inverter damage Exceeding the above specification requirements will cancel any and all warranty and liability claims The three PV strings connected to inverter should also meet the following requirements The same number of PV modules in each PV string The same type of PV modules identical inclination angle of all PV modules The identical azimuth angle of all PV modules 6 4 1 Assembling DC Cable to Connector DC cables from PV strings should be equipped with DC connectors Pairs of DC connectors are supplied in the scope of delivery NOTE To maintain IP65 weatherproof function of inverter only the supplied DC connectors or the connectors of the same protection class can be used 32 Electrical Connection 6 DC Cable Requirements Cross section Area Range Max Withstand Voltage 2 5 4mm 500V The positive and negative connectors marked with polarity symbols will be assembled with colored cables as the following procedures Assembling Procedures 1 Strip off 7mm insulation layer from all DC cables a rd a 7mm 2 Crimp cable ends into corresponding circular contacts with crimping pliers Positive Circular Contact Pd Negative Circular C
35. erfectly Install backplate Hang inverter 24 Electrical Connection Once the inverter is firmly attached to the appropriate location it can be connected into the PV power system Improper operation during the wiring process can cause fatal injury to the operator or unrecoverable inverter damage Only qualified personnel can perform the wiring work Prior to any electrical connection keep in mind that inverter has dual power supplies It is mandatory for technical personnel to wear personal protective equipments helmet footwear and gloves during the electrical work 6 1 Terminals Description All electrical terminals are located at the bottom of unit as the following diagram shown Sungrow provides corresponding plug connectors in the scope of delivery as a result of convenient and safe connection without opening the lid Fig 6 1 Terminals Description 25 SG2K5TL SG3KTL SG4KTL 31 User Manual 6 2 Simplified Electrical Connection Diagram Connecting inverter to the existing PV system includes inverter connection to local grid and inverter connection to PV arrays There may be communication connection to be established for monitoring inverter operation if necessary SunAccess 0000000000000000000 r 8
36. erter A nameplate is attached to one side of the inverter and the carton respectively It provides information on type of inverter along with the most important specifications marks of certification institutions website and serial number which is available and identified by Sungrow JUNGROW GRID CONNECTED INVERTER min MPP voltage 2107 max MPP voltage 400V max Input voltage 500V 2 max Input current 20A Isc PV 25A AC Output Rated output power 4000W Rated output voltage 230V Rated output frequency 50 2 Max Output current 19A Safety Class I Enclosure Fans IP54 Other IP65 Ambient temperature 25 C 60 C Overvoltage Category _ _ IH MAINS SUNGROW POWER SUPPLY CO LTD Fig 4 2 Nameplate of Inverter SGAKTL 31 without serial number Image shown here is indicative only Actual product you receive may differ SUNGROW logo and product type Technical data of inverter Marks of certification institutions of inverter Company name website and origin Table 4 1 Description of Icons on the Nameplate Don t dispose of the inverter with the household waste Refer to the corresponding instructions TUV mark of conformity The inverter is in compliance with directives of TUV CE mark of conformity The inverter is in compliance with directives of CE
37. hooting in according to fault type in LCD screen See 9 1 2 Troubleshooting of Faults in LCD Screen 9 1 2 Troubleshooting of Faults in LCD Screen Fault Code Troubleshooting Vdc high Vac low Vac high F fault PM fault The DC input voltage of the inverter exceeds allowable threshold The grid voltage falls below the allowable minimum grid voltage threshold of the installation country The grid voltage exceeds the allowable maximum threshold of the installation country The grid frequency exceeds the permissible range There may be malfunctions of internal modules of inverter Grid is not present 44 1 Rotate the DC switch to the OFF position immediately 2 Measure the open circuit voltage of PV string again Decrease the number of PV modules in the PV string if the voltage measured is not permissible 3 Reconnect the DC cables to the inverter and start up the inverter 4 If the fault still exists contact Sungrow service dept 1 Check the voltage of the grid 2 If the grid voltage exceeds the permissible range of inverter protective parameters the corresponding voltage range for different countries can be found in Table 10 3 ask utility grid company for solution 3 If the grid voltage is within the permissible range contact Sungrow service dept 1 Check the frequency of the grid 2 If the grid frequency exceeds the permissible range of inverter protective
38. hould obey the following procedures e Disconnect inverter from the utility grid side first and then PV arrays e Wait at least ten minutes for inner capacitors discharge completely e Verify that no voltage and current present with appropriate testing device Keep non related person away A temporary warning sign and barrier must be posted to keep non related person away for any period while performing electrical connection and service work Do not open the enclosure when the inverter is under voltage There is a highly unlikely risk of explosion in very specific cases of malfunction The housing will protect persons and property from such an explosion only if it is correctly sealed A NOTICE There is a risk of inverter damage if it is improperly serviced Use only accessories and spare parts approved by the inverter manufacturer And never modify the inverter or other components of the inverter Otherwise it will lead to loss of any and all warranty rights There is a risk of inverter damage due to electrostatic discharge The printed circuit boards contain components sensitive to electrostatic discharge Wear a grounding wrist band when handling the boards Do not touch the boards unnecessarily during replacement Others Safety Instructions A NOTICE The selected country settings can be changed by service personnel only Unauthorized access to country settings should be prohibited Alternation of the country settings
39. in this manual should be followed during installation operation and maintenance of the inverter And they will be highlighted by these symbols DANGER DANGER indicates a hazard with a high level of risk which if not avoided will result in death or serious injury WARNING indicates a hazard with a medium level of risk which if not avoided could result in death or serious injury CAUTION indicates a hazard with a low level of risk which if not avoided could result in minor or moderate injury NOTICE NOTICE indicates a situation which if not avoided could result in equipment or property damage NOTE NOTE indicates additional information emphasized contents or tips to help you solve problems or save time Symbols on the Inverter Body 4 5 gt This symbol indicates that you should wait at least 10 minutes after disconnecting the inverter from the utility grid and from the PV input before touching any inner live parts Hot surface In order to reduce the risk of burns do not touch device hot surface when the device is running Look over the user manual before any operation onto the inverter The installation and service of the inverter unit can only be performed by qualified personnel Do not disconnect DC connectors from the unit under load Contents T Safety Instructions uoce ee ttn htl en eee ar 1 2 Product Introduchon ii eiii a eive alas 7 2 1 Intended Usage oie
40. irm Com param Address 001 NOTE The range of communication address is 1 247 And the baud rate of serial communication is 9600 61 SG2K5TL SG3KTL SG4KTL 31 User Manual 10 16 2 Protocol Settings 1 Press ENTER to enter general control screen 2 Press V to navigate arrow pointer to Set param and then press ENTER 3 Press gt to move cursor to the right and press button V to set password 1111 Press ENTER to enter into parameters settings 4 Press V to navigate arrow pointer to and then press ENTER 5 Press V to navigate arrow pointer to Protocol and press ENTER 6 Press button V to set appropriate communication protocol Press ENTER to confirm Protocol 0 Modbus 1 Sungrow 10 17 Inverter Start and Stop Starting the Inverter 1 Press ENTER to enter general control screen 2 Press V to navigate arrow pointer to Start Stop and then press ENTER 3 Press V to navigate arrow pointer to Start and then press ENTER to start inverter Start Stop Stopping the Inverter 1 Press ENTER to enter general control screen 2 Press V to navigate arrow pointer to Start Stop and then press ENTER 3 Press V to navigate arrow pointer to Stop and then press ENTER to stop inverter Start Stop 62 APPENDIX Electrical Specifications Technical Specifications SG2K5TL 31 SG3KTL 31 SG4KTL 31 DC SIDE DAT
41. may cause a breach of the type certificate marking All safety instructions warning labels and nameplate on the inverter body e Must be clearly visible e Must not be removed covered and pasted These regulations should also be followed e The regulations related to the electricity fed into grid e The safety instructions related to PV arrays e The safety instructions related to other electrical device 1 SG2K5TL SG3KTL SG4KTL 31 User Manual Product Introduction 2 1 Intended Usage SG2K5TL 31 SG3KTL 31 and SG4KTL 31 They will be referred to as inverter hereinafter unless otherwise specified single phase without transformer string inverters are crucial units between the PV arrays and utility grid in the small scaled PV power system Inverter is dedicated to converting direct current power generated by the PV modules into alternating current which conforms to parameters of local utility grid and feeds the alternating current into the utility grid An example about intended usage of the inverter is show in Fig 2 1 A NOTICE Where the positive or negative terminal of PV strings needs to be grounded inverter cannot be connected to PV modules of this type A ie Fig 2 1 Inverter Applied in the Power System SG2K5TL SG3KTL SG4KTL 31 User Manual Item Description Remark A PV strings monocrystalline silicon polycrystalline silicon a
42. nd thin film without grounding of protection class II SG2K5TL 31 SG3KTL 31 or SG4KTL 31 involved Metering device meter cupboard with power distribution system Utility grid TT TN Any other or additional usage is not permitted except the intended usage Inverter may only accept PV modules of Protection Class Il as its input Inverter may only be connected to utility grid via distribution board Local loads home appliance lights motor loads etc can not connected between inverter and AC circuit breaker on the distribution board Additionally the unit is intended for fixed installation Located on a part that is not removable without impairing the operation of the unit 2 2 Product Description 2 2 1 Product Appearance Fig 2 2 Product Components Description Item Name Description 1 LCD display Inverter operation data viewing and parameters configuration can be panel performed on the LCD display panel Product Introduction 2 Item Name Description 2 DC switch Optional component It is designed for safely disconnecting DC current DC terminals There are three pairs of DC terminals between PV arrays and inverter 4 RS485 Standard communication interface terminals e m 2 2 2 Dimensions and Weight of Inverter w 20000000000 00000 000 Fig 2 3 Dimensions of Inverter Table 2 1 Dimensions Value SG2K5
43. nstallation shall comply with the relevant instructions of AS 4777 1 5 1 Selecting Installation Location Selecting an optimal installation location for the inverter is decisive for its operating safety as well as it expected efficiency and service life 1 Take the load capacity of the wall into account The wall such as concrete wall and metal structure should be strong enough to hold the weight of the inverter over a long period of time 2 Install the unit where is accessible to install electrical connection or service 3 Do not install the inverter where contains flammable materials or flammable gas in the vicinity of the unit installation X Flammable material or gas near the installation 19 SG2K5TI S G3KTL S GAKTL 31 user Manual 4 Do not install the unit on wall of flammable materials Flammable wall material 5 Install the unit at eye level for easily buttons operation and display read 7 ML 6 It is suggested that the inverter be installed vertically with upside up for good heat dissipation 7 Never install the inverter horizontally or with a forward tilt or with a backward tilt or even with upside down With a forward tilt With a backward tilt Horizontally With upside down 8 The inverter unit with IP65 can be installed indoors or outdoors also 20 Installing Inverter onto Wall 5 9 The ambient temperature should range from 29 ae 25 C to 60 C When
44. onnect charging source prior to connecting or disconnecting battery terminals Determine if battery is inadvertently grounded If inadvertently grounded remove source from ground Contact with any part of a grounded battery can result in electrical shock The likelihood of such shock can be reduced if such grounds are removed during installation and maintenance applicable to equipment and remote battery supplies not having a grounded supply circuit 47 SG2K5TL SG3KTL SG4KTL 31 User Manual 48 1 Operation of LCD Menu 10 1 Description of Button Function Inverter offers two buttons for the user to look up running information and configure parameters The two buttons have multiple functions Users should know the button functions and how to operate before any operation onto inverter Table 10 1 Description of Button Function ESC Y Press less than two seconds Move arrow upwards and downwards in the screen or increase and decrease the setting value It is referred to as press ESC hereinafter Press more than two seconds Return to parent screen or cancel the command It is referred to as press W hereinafter ENTER Press less than two seconds Move arrow left or right in the screen It is referred to as press hereinafter Press more than two seconds Enter into sub screen or confirm the command It is referred to as press ENTER hereinafter NOTE The background illumination of
45. ons about over voltage protection under voltage protection over frequency protection and under frequency protection After confirming Auto test command the inverter will perform protection functions test automatically in turn Finally the results will come out 1 2 3 4 5 6 Press ENTER to enter general control screen Press V to navigate arrow pointer to Set param and then press ENTER Press to move cursor to the right and press button V to set password 1111 Press ENTER to confirm command Press V to navigate arrow pointer to Sys param and then press ENTER Press V to navigate arrow pointer to Auto test Italy and then press ENTER Inverter will start to auto testing Vgrid max 0 0V Vgrid min 0 0V Fgrid max 0 0Hz Fgrid min 0 00Hz Vnorm 0 0V Vnorm 0 0V Fnorm 0 0Hz Fnorm 0 00Hz Ttrip 0000ms Ttrip 0000ms Ttrip 0000ms 0000ms NOTE Vgrid max the maximum threshold of allowable grid voltage Vgrid min the minimum threshold of allowable grid voltage Fgrid max the maximum threshold of allowable grid frequency Fgrid min the minimum threshold of allowable grid frequency Vnorm current grid voltage Fnorm current grid frequency Ttrip time interval from current grid state exceeding allowable ranges to inverter disconnecting from grid If four different values of Ttrip meet the corresponding standards
46. ontact r 4 Insert the crimped on circular contact into insulator until it snaps into place And pull gently to check that it is correctly engaged 3 Lead cable through cable gland Positive Insulator Circular Contact Cable Gland 5 Screw the cable gland to front insulator with tightening torque 2 Nm 33 SG2K5TL SG3KTL SG4KTL 31 User Manual 6 4 2 Wiring Procedures DANGER Make sure that all the DC and AC cables to the inverter are no live before you start the electrical work Connect the inverter to PV array as the following procedures 1 Manually rotate the DC switch at the bottom to the OFF position 2 Check the connection cable of PV string for the correct polarity and that the short circuit voltage does not exceed inverter input limit 500V even under the lowest operating temperature Refer to module specification supplied by module manufacturer 3 Measure the DC voltage between the positive terminal of the PV string and Earth and the DC voltage between the negative terminal of the PV string and Earth If the two voltages are constant and not zero there is an insulation failure somewhere in this PV string Solve the insulation failure if required 4 Plug the positive and negative DC connectors into corresponding terminals until there is an audible sound 5 Connect other two PV strings in the same procedures if necessary Unused DC terminals should be sealed 34 Electrical Connection 6
47. ow The inner DC bus boost output voltage is too low Samp ft The sampling circuit malfunction happens DC Inject DC component of output current is too high 54 Operation of LCD Menu 10 10 8 Language Settings Inverter supports four different languages English Deutsch Frangaise and Italia Language can be configured as the following indications 1 2 6 T Press ENTER to enter general control screen from the default screen Press V to navigate arrow pointer to Set param and then press ENTER Press gt to move cursor to the right and press button to set password 1111 Press ENTER to confirm command Press V to navigate arrow pointer to Sys param and then press ENTER Press V to navigate arrow pointer to Language and then press ENTER Press V to navigate cursor to select the number that represents language And press ENTER to confirm the selection Language OJEnglish 1 Deutsch 2 Frangaise 3 ltalia 10 9 Time Settings If there is deviation between the time in the default screen and your local time you should perform time settings as they will directly affect data record 1 2 6 7 Press ENTER to enter general control screen from the default screen Press V to navigate arrow pointer to Set param and then press ENTER Press gt to move cursor to the right and press button to set password 1111 Press ENTER to confirm command Press V to navigate ar
48. row pointer to Sys param and then press ENTER Press V to navigate arrow pointer to Time and then press ENTER Press gt to move right and press to set the correct time Press ENTER after finish settings 55 SG2K5TL SG3KTL SG4KTL 31 User Manual Time Date 09 11 18 Time 18 35 55 10 10 Deviation of E tot Adjustment Where there is deviation between E tot in the inverter LCD screen and energy recorded in the energy metering device you should perform energy adj settings as the following indications 1 Press ENTER to enter general control screen from the default screen 2 Press V to navigate arrow pointer to Set param and then press ENTER 3 Press gt to move cursor to the right and press button V to set password 1111 4 Press ENTER to confirm command 5 Press V to navigate arrow pointer to Sys param and then press ENTER 6 Press V to navigate arrow pointer to Energy adj and then press ENTER 7 Press gt to move right and press to set off set value Press ENTER to confirm the settings Energy adj 0000kWh NOTE The positive symbol can also be changed to negative symbol range is from 9999 9999 kWh oy The adjustable Energy adj value Real measured value E tot reading value 56 Operation of LCD Menu 10 10 11 Load Default Settings If Load default is performed all running information and historical records will unrecoverable cle
49. rter through LCD command 2 If the fault still exists contact Sungrow service dept Com err LCD can not communicate with 1 If this malfunction happens wait for a DSP while and observe whether fault can be cleared by the inverter itself 2 Perform the command Stop in the LCD display 3 Perform the command Start to restart the inverter 4 If the fault still exists contact Sungrow service dept 45 SG2K5TL SG3KTL SG4KTL 31 User Manual NOTE If you have any problems in operating on the inverter please contact us Service hotline 86 551 532 7834 532 7845 Email service sungrow cn We need the following information to provide you the best assistance e of the inverter e Serial number of the inverter e Fault code e Brief description of the fault phenomenon 9 2 Maintenance Once the inverter is well operated normally inverter needs no maintenance or calibration It should be ensured however that the heat sink is not covered To ensure the functionality of the DC switch it should be switched on and off by turning the switch to on and off positions at least ten times once a year 9 2 1 Cleaning the Cabinet Clean inverter by means of pressurized air or a soft cloth or a brush Do not use a water hose aggressive chemicals cleaning solvents or strong detergents to clean inverter 9 2 2 Cleaning the Heat Sink In order to secure proper function and extend inverter service life it is es
50. s ENTER 5 Press V to move to next screen of the current time And press gt to go back to last time node 8 15 There are running records of 15 pages in total and here is the eighth page P8 15 2009 11417 14 35 P8 15 2009 11417 14 35 E day 15 6kWh E tot 497600kWh P ac 4 000kW Temp 49 5 C V dc 300 4V I de 13 6A State Run V grid 220 0V l grid 18 2A F grid 50 0Hz 53 SG2K5TL SG3KTL SG4KTL 31 User Manual 10 7 2 Fault Record Inverter stores up to 20 fault records which include type and the occurrence time User can look up the historical fault records following the procedures below 1 Press ENTER to enter general control screen from the default screen 2 Press V to navigate arrow pointer to His inform and then press ENTER 3 Press V to navigate arrow pointer to Fault record and then press ENTER 4 Press V to move to next fault record in same page Press gt to turn pages P1 1 There are fault records of one page in total and here is the first page T 2 The total number of fault records is two P1 1 Faultrec T 2 p 2009 11 05 09 15 59 Samp flt 0001 2009 11 05 09 15 59 Vac high 261V Table 10 2 The Explanation of Faults PM fault Malfunctions of the power module occur Temp flt Temperature inside the enclosure is too high Earth ft There is leakage current in the AC side Bus high The inner DC bus boost output voltage is too high Bus l
51. sential that the free air circulation around the heat sink and the fan only for SGAKTL 31 at the back of the inverter is not obstructed If the free air circulation is obstructed e g by dust this has to be removed 9 2 3 Battery Maintenance There is a button battery on the inner LCD PCB board It may need to be serviced when it comes to service life Step 1 Disconnect the connection of the output and input side Step 2 Wait for at least ten minutes 46 Troubleshooting 9 Step 3 Loose screws of inverter upper lid Step 4 Check that there is no voltage existing inside with appropriate test device Step 5 Replace the button battery The following requests should be obeyed during the battery maintenance Servicing of batteries should be performed or supervised by personnel knowledgeable about batteries and the required precautions When replacing batteries replace with the same type and number of batteries or battery packs Do not dispose of batteries in a fire The batteries may explode Do not open or damage batteries Released electrolyte is harmful to the skin and eyes It may be toxic A battery can present risk of electrical shock and high short circuit current The following precautions should be observed when working on batteries Remove watches rings or other metal objects Use tools with insulated handles Wear rubber gloves and boots Do not lay tools or metal parts on top of batteries Disc
52. thirty n L1 n L2 n L3 s30 Inverters should be distributed as equally as possible between the three phases with maximum unbalanced load of 4 6kVA Scenario 3 Several inverters are operated in parallel connection to low voltage side of MV transformer The high voltage side of MV transformer is connected to the Middle Voltage Grid Low voltage Side High voltage Side U2 4 t i SYN u v2 mm Am V1 w2 nt m wi N MV Transformer Inverter 1 Inverter 2 Inverter n L1 Inverter 1 Inverter 2 Inverter n L2 Inverter n L3 Inverter 1 Inverter 2 Electrical Connection 6 Requirements The sum of all inverters in parallel connection is limited to thirty n L1 n L2 n L3 s30 Inverters should be distributed as equally as possible between the three phases at the low voltage side with maximum unbalanced load of 4 6kVA rate voltage on the low voltage side of transformer must meet the inverter output electrical specification A neutral point is necessary and must lead outwards as neutral conductor As mentioned above in the three scenarios the total number of inverters is always less than or equal to THIRTY If there are inverters more than the limited value Inverters may not operate normally 6 3 2 Assembling AC Connector with Cables The grid connection of inverter is made via 3 wires L N
53. tt systems The pursuit of Sungrow is to help our customers acquire stable and clean power with minimum cost maximum reliability and enhanced safety Contact Information If you have any questions about this product our hotline will be happy to assist you Please keep the following data when contacting Sungrow Company Sungrow Power Supply Co Ltd Website www sungrowpower com Contact Mr Henry Director of International Trade Email info sungrow cn service sungrow cn No 2 Tianhu Rd New amp High Technology Industrial Development Zone 644595 Hefei P R China Zip 230088 Telephone 86 551 532 7834 86 551 532 7845 Fax 86 551 532 7856 67 SUNGROU Green and Effective Specifications subject to change without notice
54. uped as the following Conversion function Inverter converts the direct current power into alternating current power which conforms to the grid requirement of its installation country e Data storage and display Inverter stores essential data including running information and fault records and displays them on integrated LCD display 11 SG2K5TL SG3KTL SG4KTL 31 User Manual Parameters configuration Inverter provides various parameters configuration for optimal operation Communication interface Standard RS485 interface for connecting other monitoring devices into the PV system is included Protection functions include reverse polarity protection short circuit protection insulation resistance to ground surveillance inverter output voltage surveillance inverter output frequency surveillance residual current protection DC component of AC output current surveillance anti islanding phenomena protection ambient temperature surveillance 12 Workflow about Inverter The following diagram shows the installation flow of inverter for installer Please follow these procedures lt Start gt Y Unpacking and Inspection Y Read User Manual Storage Mounting Location Selection Y Moving Inverter Mounting the Inverter Y Electrical Connection Y Check before Commissioning Y
55. utomatically when input and output meet the requirements If you want to interrupt its running or if a malfunction occurs rotate DC switch to the OFF position to stop inverter from running 10 Product Introduction 2 NOTE Before restarting the inverter rotate the DC switch to the ON position 2 3 Technical Description 2 3 1 Principle Description The principle design of transformer less and grid connected inverter can be known from the block diagram Fig 2 5 Three PV strings input voltage is transmitted to DC BUS via Boost circuit And then a full bridge circuit converts it into sinusoidal current The AC connection to the local utility grid is via 3 wires for a single phase feed point There is a MPP tracker to ensure that maximum power from PV string can be utilized Inside the inverter protective circuit to can trigger AC relay if required for guaranteeing inverter safely operation and person Standard interface RS485 are provided for communication with other devices You can look up inverter running status and configure parameters by navigating LCD display panel menu f Full Bridge Communication Interface RS485 Functional Safety and Protective Circuit ae SE cac PE Relay 1 Relay 2 E LCD Display Panel 7 Fig 2 5 Main Circuit Diagram of Inverter 2 3 2 Functions Description Inverter functions can be gro
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