Sofar solar 250KTL-HV User Manual
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Sofar solar 250KTL-HV User Manual

Solar grid-tied inverter
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Solar Grid-tied Inverter
Product Model: SOFAR 255KTL-HV
S h e n z h e n S O FA R S O L A R C o . , L t d .

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Summary of Contents for Sofar solar 250KTL-HV

  • Page 1 User manual Solar Grid-tied Inverter Product Model: SOFAR 255KTL-HV S h e n z h e n S O FA R S O L A R C o . , L t d .

  • Page 2: Table Of Contents

    SOFAR 250/255KTL-HV User Manual Contents Preface................................II 1. Basic Safety Information........................- 1 - 1.1. Requirement for Installation and Maintenance ............- 1 - 1.2. Symbols and signs....................- 4 - 2. Product Characteristics ......................... - 6 - 2.1. Intended Use ......................- 6 - 2.2.

  • Page 3: Preface

    SOFAR 250/255KTL-HV User Manual Preface Notice The products, services or features you purchased shall be subject to the company's commercial contracts and terms. All or part of the products and services described in this document may not within the scope of your purchase. Unless additional terms and conditions in your contract, the company does not make any statement or guarantee on the contents of this document.
  • Page 4 Please read it carefully before operating. Scope of Validity  This manual contains important instructions for: SOFAR 250KTL-HV,SOAFR 255KTL-HV Target Group  This manual is for qualified electricians. The tasks described in this manual only can be performed by qualified electricians.

  • Page 5: Basic Safety Information

    SOFAR 250/255KTL-HV User Manual 1.Basic Safety Information Outlines of this Chapter Please read the instruction carefully. Faulty operation may cause serious injury or death . If you have any question or problem when you read the following information, please contact Shenzhen SOFARSOLAR CO., Ltd.
  • Page 6 SOFAR 250/255KTL-HV User Manual reduce the risk of personal injury and to ensure the safe installation and operation of the product, only a qualified electrician is allowed to execute transportation, installation, commissioning and maintenance. Shenzhen SOFARSOLAR Co, Ltd does not take any responsibility for the property destruction and personal injury because of any incorrect use.
  • Page 7 SOFAR 250/255KTL-HV User Manual proper package. Transportation company should responsible for any damage during transport period. If you find any packing problems that may cause the damage of inverter or any visible damage, please notice the responsible transportation company immediately. You can ask your installer or SOFARSOLAR for help if necessary.

  • Page 8: Symbols And Signs

    SOFAR 250/255KTL-HV User Manual Inverter should not work again until removing all faults. If any repair work is required, please contact local authorized service centre. Should not open the inverter cover without authorized permit, Attention SOFARSOALR does not take any responsibility for that. EMC/Noise Level Electromagnetic compatibility (EMC) refers to that on electrical equipment functions in a given electromagnetic environment without any trouble or error,...
  • Page 9 SOFAR 250/255KTL-HV User Manual Signs on the Product and on the Type Label SOFAR 250/255KTL-HV has some safety symbols on the inverter. Please read and fully understand the content of the symbols before installation. Symbols Name Explanation After disconnect with the DC side, there is a residual voltage in the inverter, This residual...

  • Page 10: Product Characteristics

    SOFAR 250/255KTL-HV User Manual 2.Product Characteristics Outlines of this Chapter Product Dimensions Introduce the filed of use and the dimensions of the product. Function Description Introduce working principle and internal components. Efficiency Curves Introduce the efficiency curves of the product. 2.1.
  • Page 11 SOFAR 250/255KTL-HV User Manual Product Dimensions The choice of optional parts of inverter should be made by a qualified technician who knows the installation conditions clearly. Dimensions Description SOFAR 250/255KTL-HV  L×W×H=1100.5*713.5*368mm Figure 2-2 Product front view and left view dimensions - 7 - Copyright ©...

  • Page 12: Function Description

    SOFAR 250/255KTL-HV User Manual Figure 2-3 Product back view and bracket dimensions Labels on the equipment  Note: label must NOT be hidden with objects and extraneous parts (rags, boxes, equipment, etc.,); they must be cleaned regularly and kept visible at all times. Figure 2-4 Product label 2.2.
  • Page 13 SOFAR 250/255KTL-HV User Manual Board. Input Board also offer functions such as insulation impedance detection and input DC voltage/ current detection. DC power is converted to AC power by Power Board. AC power is filtered through Output Board then AC power is fed into the grid.

  • Page 14: Electrical Block Diagram

    SOFAR 250/255KTL-HV User Manual 2.3. Electrical block diagram SOFAR 250/255KTL-HV has 16-24 DC input strings. 8-12 MPPT trackers that converters the direct current of PV array to grid-compliant, three phase current and feeds in into the utility grid. Both DC and AC side has Surge Protection Device (SPD).
  • Page 15 SOFAR 250/255KTL-HV User Manual Schematic diaram - 11 - Copyright © Shenzhen SOFARSOLAR Co., Ltd...

  • Page 16: Efficiency And Derating Curve

    SOFAR 250/255KTL-HV User Manual 2.4. Efficiency and derating curve - 12 - Copyright © Shenzhen SOFARSOLAR Co., Ltd...

  • Page 17: Inverter Storage

    SOFAR 250/255KTL-HV User Manual 3.Inverter Storage If inverter is not installing immediately, storage condition need meet below requirements: Place inverter into the original package and leave desiccant inside, sealed  tight with taps. Keep the storage temperature around -40℃ ～ 70℃, Relative humidity 0 ～ ...

  • Page 18: Installation

    SOFAR 250/255KTL-HV User Manual 4.Installation Outlines of this Chapter This topic describes how to install this product, please read carefully before install. Do NOT install the product on flammable material. Do NOT store this product in potentially explosive atmospheres. Dangers The enclosure and heat sink will get hot during operation, please do not mount the product at a easy to reach location.
  • Page 19 SOFAR 250/255KTL-HV User Manual parts were included in the packing, please contact your distributor immediately if anything missing or damage. Table 4-1Components and mechanical parts that inside the package Pictures Description Quantity SOFAR 250/255KTL-HV 1 PCS Rear Panel 1 PCS 24PCS PV+ input connector PV- input connector...

  • Page 20: Tools

    SOFAR 250/255KTL-HV User Manual 4 PCS Auxiliary Handle M6*30 Hexagon screws 2 PCS Manual 1PCS Warranty Card 1PCS Quality Certificate 1PCS COM 16pin connector 1PCS M4X14 Cross round head triple set screw（Only for DC 1pcs switch lock） 4.3. Tools Prepare tools required for installation and electrical connection as following table: Table 4-2 Installation tools Tool Description...
  • Page 21 SOFAR 250/255KTL-HV User Manual Use to tighten and loosen screws when installing AC Screwdriver power cable Use to remove AC connectors from the product Removal Tool Remove PV Connector Wire Stripper Used to peel cable With an open end of larger Used to tighten expansion than or greater bolts...

  • Page 22: Determining The Installation Position

    SOFAR 250/255KTL-HV User Manual Check grounding cable, PV Multimeter positive and negative pole Marker Mark signs Measuring Measure distance Tape Ensure the rear panel is Level properly installed Installer wear when installing ESD gloves product Installer wear when installing Safety goggles product Installer wear when installing Mask...
  • Page 23 SOFAR 250/255KTL-HV User Manual Figure 4-1 Installation Position Selection Figure 4-2 Clearance for single inverter - 19 - Copyright © Shenzhen SOFARSOLAR Co., Ltd...
  • Page 24 SOFAR 250/255KTL-HV User Manual Note: Other requirement for install position: Install position should obstruct the  disconnect of power. Place inverter in an appropriate  bearing capacity objects. Location should be avoid touch by  children. ≥800mm ≥1000mm - 20 - Copyright ©...

  • Page 25: Moving Of Inverter

    SOFAR 250/255KTL-HV User Manual ≥300mm ≥600mm Figure 4-3 Clearance for multiple inverters 4.5. Moving of inverter 4.5.1 Manual handling Unload the inverter from package, horizontally move to the install position. When open the package, at least two operator insert the hands into the slots on both side of the inverter and hold the handles.
  • Page 26 SOFAR 250/255KTL-HV User Manual Keep the balance when lift the inverter. Required at least two operators for lifting or use forklift. Inverter is heavy, dropped while being transported may cause injuries. Do not put the inverter with wiring terminals contacting the floor because the power ports and signal ports are not designed to support the weight of the inverter.

  • Page 27: Installation

    SOFAR 250/255KTL-HV User Manual ground by using lifting equipment, check the tightening device of the hoisting ring and rope. After confirming that the binding connection is secure, lift the inverter to the destination. Keep balance when lifting the inverter, avoid to crash on wall or other objective.
  • Page 28 SOFAR 250/255KTL-HV User Manual Figure 4-9 Screws into the holes Step 3: Align the rear panel with the hole positions, fix the rear panels on the wall by tightening the expansion bolt with the nuts. Figure 4-10 Install rear panel Step 4: Lift the inverter and hang it on the rear panel,and fixing both side of inverter with M6 screw (accessories).
  • Page 29 SOFAR 250/255KTL-HV User Manual Figure 4-11 Fix inverter 4.6.2 Bracket Installation： Step 1: Use wall mount bracket, ensure the pole position are in same level by using level rule and take a mark with maker. Figure 4-12 Ensure hole position Step 2: Drilling hole by using Hammer Drill, recommend to do a stain proofing.
  • Page 30 SOFAR 250/255KTL-HV User Manual Figure 4-14 Fix wall bracket Step 4: Lift the inverter and hang it on the wall bracket,and fixing both side of inverter with M6 screw（repeat 4.6.1step 4）. Note: If height between ground and bracket is less than 1.3m, use auxiliary handle for installation.

  • Page 31: Electrical Connection

    SOFAR 250/255KTL-HV User Manual 5.Electrical Connection Outlines of this Chapter This section introduces the electrical connection for the product. Please read the information carefully, it may helpful to understand the grounding wiring, DC input connection, AC output connection and communication connection. Caution: Before performing electrical connections, ensure the DC switch is OFF and AC circuit breaker is OFF.

  • Page 32: Terminal Connector

    SOFAR 250/255KTL-HV User Manual 5.6 Communication Connection Introduce the propose WIFI/USB, COM and how to connect WIFI/USB port. 5.7 Safety check Before operate inverter, check the PV array, inverter DC side safety connection and AC side safety connection. 5.1. Electrical Connection Figure 5-1 Flowchart for connecting cables to the inverter 5.2.

  • Page 33: Grounding Connection (Pe)

    SOFAR 250/255KTL-HV User Manual RS485 RS485 Communication port/ RS485/DRMs Modbus/DRMs DRMs port AC output AC output terminal terminals Connecting terminal of the Grounding ground , choose at least one for grounding connection DC switch lock For Australian models *Note: Lock the screw to limit the torque of the DC switch, making it impossible to twist the DC switch from OFF to ON, or ON to OFF.Remove the screw before turning the DC switch from OFF to ON or ON to OFF.

  • Page 34: Connect Grid Side Of Inverter(Ac-Output)

    SOFAR 250/255KTL-HV User Manual OTM6, Cable: ≥6mm Figure 5-3 Grounding connection instruction（2） Note 1: L3 is the length between the insulation layer of the ground cable and crimped part. L4 is the distance between the crimped part and core wires protruding from the crimped part.

  • Page 35: Wiring Terminal And Precautions

    SOFAR 250/255KTL-HV User Manual grid for protection. For external Residual Current Device (RCD), the rated residual current shall be 300mA or higher. Precondition： Inverter AC side should connect a three phase circuit current to ensure inverter can be cut off with utility grid for abnormal condition. The AC cable need to meet the requirement of local grid operator.
  • Page 36 SOFAR 250/255KTL-HV User Manual company. Should not connect any loads between inverter and AC circuit breaker.  OT/DT Requirement.  When use copper core cable, please use copper terminal connector.  When use copper clad aluminum cable, please use copper terminal connector. ...
  • Page 37 SOFAR 250/255KTL-HV User Manual Figure 5-7 AC Terminal size 5.4.4 Wring Procedure The section will use a five core wire as a sample, four core wire has same connection process. Table 5-1 Recommend AC cable size Name Type Area(mm²) Recommended：Outdoor Copper Wire: 95~185;...
  • Page 38 SOFAR 250/255KTL-HV User Manual Step 4: Remove the insulation layer of an appropriate length according to figure below. Step 5: Crimp the terminal. Step 5: Depending on the grid configuration, connect L1, L2, L3 and N to the terminals according to the label and tighten the screw on the terminal using a screwdriver.

  • Page 39: Connect Pv Side Of Inverter（Dc-Input

    SOFAR 250/255KTL-HV User Manual Note： Phase lines use M12 terminal connector, PE line use M8 terminal connector.  5.5. Connect PV side of inverter（DC-Input） Note： Connecting PV strings into inverter must following the below procedure.  Otherwise, any faulty cause by inappropriate operation will be including in the warranty case.
  • Page 40 SOFAR 250/255KTL-HV User Manual Table 5-2 Recommend DC cable size Copper cable cross section area（mm ） Cable OD(mm) Range Recommend 4.0~6.0 4.5~7.8 Step 1: Find the metal contact pins in the accessories bag, connect the cable according below diagram (1.Positive cable, 2. negative cable). Figure 5-8 DC cable connection（1）...
  • Page 41 SOFAR 250/255KTL-HV User Manual Step 4: Measure PV voltage of DC input with multimeter, verify DC input cable polar and connect DC connector with inverter until hearing a slight sound indicated connection succeed. Figure 5-9 DC cable connection Note ： Please use multimeter to make sure the PV array positive pole and negative pole! Dealing ：...

  • Page 42: Communication Connection

    SOFAR 250/255KTL-HV User Manual Figure 5-10 Removal DC connector 5.6. Communication Connection Note：When layout the wiring diagram, please separate the communication wiring and power wiring in case the signal be affected. 5.6.1 USB/WIFI Port Port Description： USB：USB Port Use for updating the software USB/WIFI port Use for connect Wi-Fi for data WIFI：WIFI Port...
  • Page 43 SOFAR 250/255KTL-HV User Manual RS485A RS485 signal+ monitoring or multiple inverter RS485B RS485 signal- monitoring RS485B RS485 signal- Electric meter Electric meter RS485 signal+ RS485A Wire connection Electric meter Electric meter Electric meter RS485 signal- RS485B GND.S RS485 signal ground DRM0 Remote shunt down DRM1/5...

  • Page 44: Commissioning Of Inverter

    SOFAR 250/255KTL-HV User Manual 6.Commissioning of inverter Outlines this Chapter Introduce SOFAR 250/255KTL-HV safety inspection and start processing. 6.1. Cable Connection Inspection For first time operation, check the AC voltage and DC voltage are within the acceptable range. Attention AC grid connection Use multimeter to confirm that three lines and PE line are connect correctly.

  • Page 45: Operation Interface

    SOFAR 250/255KTL-HV User Manual 7.Operation interface Outlines of this chapter This section introduces the display, operation, buttons and LED indicator lights of SOFAR 250/255KTL-HV Inverter. 7.1. Operation and Display Panel Buttons and Indicator lights Button: “ ” Short press UP button = go up “...

  • Page 46: Standard Interface

    SOFAR 250/255KTL-HV User Manual 7.2. Standard Interface LCD interface indicated inverter status, alarm information, communication , grid voltage,current and frequency, connection, PV input current and voltage today ge neration, total generation. Inverter working status, PV 1 -12 PV input voltage and current Inverter working status, PV generated power Inverter working status, today generated electricity Inverter working status, total generated electricity...
  • Page 47 SOFAR 250/255KTL-HV User Manual Inverter working status, grid voltage and frequency Inverter working status, Wi-Fi/ RS485 status Inverter faulty alarm When power turn on, LCD interface displays Initializing, refer below picture. When control board successfully connected with communication board, the LCD display the current state of the inverter，display as shown in the figure below.
  • Page 48 SOFAR 250/255KTL-HV User Manual Inverter states includes: wait, check, normal, fault and permanent. Wait:Inverter is waiting to Check State when reconnect the system. In this state, grid voltage value is between the max and min limits and so on; If not, Inverter will go to Fault State or Permanent State.

  • Page 49: Main Interface

    SOFAR 250/255KTL-HV User Manual 7.3. Main Interface Long press the down button under standard interface to enter into main interface, Main interface including below information: Normal ---------Long press DOWN button 1.Enter Setting 2.Event List 3.SystemInfo 4.Display Time 5.Software Update (A)Enter setting Interface as below： 1.Enter Setting --------Long press DOWN button 1.Set time...
  • Page 50 SOFAR 250/255KTL-HV User Manual 4. Country Country Long press button, enter interface, save the specific file into USB and insert USB into inverter communication port. 5. On-Off Control Inverter on-off local control. 6. Set Energy Set the total power generation. You can modify the total power generation through this option.

  • Page 51: Updating Inverter Software

    SOFAR 250/255KTL-HV User Manual records, Event will be listed by the happening time, and recent events will be listed in the front. Please refer to below picture. Long press the button and short press the button to turn the page in standard interface, then enter into “2.Event List” interface.
  • Page 52 SOFAR 250/255KTL-HV User Manual software bugs. Step 1：Turn off AC circuit breaker and DC switch, remove the communication board cover as below figure. If the RS485 line has been connected, please release the waterproof nut first and make sure the communication line is no longer the force.

  • Page 53: Trouble Shooting And Maintenance

    SOFAR 250/255KTL-HV User Manual 8.Trouble shooting and maintenance 8.1. Troubleshooting This section describes the potential errors for this product. Please read carefully for the following tips when doing the troubleshooting: 1) Check the warning message or faulty codes on the inverter information panel 2) If not any error code display on the panel, please check the following lists: —...
  • Page 54 SOFAR 250/255KTL-HV User Manual check whether the grid voltage/frequency is within the acceptable range. If no, contact technical support. If yes, check the AC circuit breaker and AC wiring of the inverter. If the grid voltage/frequency is The power grid within the acceptable range and ID04 GridUFP frequency is too...
  • Page 55 SOFAR 250/255KTL-HV User Manual Grid instantaneous ID10 GridOVPInstant2 voltage too high 2 Grid Line voltage ID11 VGridLineFault Faulty Inverter ID12 InvOVP overvolatge The grid current ID17 HwADFaultIGrid sampling error The DCI sampling ID18 HwADFaultDCI error Grid voltage HwADFaultVGrid sampling faulty ID19 (DC) ID17-ID24 are internal faults of...
  • Page 56 SOFAR 250/255KTL-HV User Manual SpiCommFault(D Communication ID33 Faulty （DC side） SpiCommFault(A Communication ID34 Faulty （AC side） Chip Faulty（DC ID35 SChip_Fault side） Chip Faulty（AC ID36 MChip_Fault side）） HwAuxPowerFaul Auxiliary power ID37 error InverterSoftStartF Inverter soft start ID38 failed ID41 RelayFail Relay faulty Low isolation ID42 IsoFault faulty...
  • Page 57 SOFAR 250/255KTL-HV User Manual Heat sink4 TempFault_HeatSi ID53 over-temperature protection Heat sink5 TempFault_HeatSi ID54 over-temperature protection Heat sink6 TempFault_HeatSi ID55 over-temperature protection environment temperature1 ID57 TempFault_Env1 protection Ambient ID58 TempFault_Env2 temperature 2 protection Model1 ID59 TempFault_Inv1 over-temperature protection Model2 ID60 TempFault_Inv2 over-temperature protection Model3...
  • Page 58 SOFAR 250/255KTL-HV User Manual ID71 BusOVP BUS overvoltage Inverter bus voltage ID72 SwBusRmsOVP overvoltage software Inverter bus voltage instantaneous value ID73 SwBusInstantOVP overvoltagesoftwar ID81 Reserved Dci overcuurent ID82 DciOCP faulty ID83 are internal faults of inverter, turn OFF the “DC Output switch”, wait for 5 minutes, then ID83 SwOCPInstant...
  • Page 59 SOFAR 250/255KTL-HV User Manual Inverter bus ID98 HwBusOVP hardware overvoltage HwBuckBoostOC BuckBoosthardwar ID99 e overflows ID100 Reserved ID102 HwPVOCP PV hardware overcurrent AC output ID103 HwACOCP hardware overcurrent ID105 MeterCommFault Electric meter error OverTempDeratin Overtemperature ID113 derating ID114 FreqDerating Frequency derating ID115 FreqLoading Frequency loading This faulty only cause alarm,...
  • Page 60 SOFAR 250/255KTL-HV User Manual Output transient unrecoverAcOCPI ID134 overcurrent nstant permanent fault Output current unrecoverIacUnba ID135 imbalance lance permanent fault Input mode setting unrecoverPvConfi ID137 error permanent gError failure unrecoverPVOCPI Input overcurrent ID138 nstant permanent fault unrecoverHwPVO Input hardware ID139 overcurrent permanent fault unrecoverRelayFa...
  • Page 61 SOFAR 250/255KTL-HV User Manual Communication ID150 board FLASH error FlashFault SCI communication ID152 SafetyVerFault error (DC) SCI communication ID153 SciCommLose(D error (AC) SCI communication ID154 SciCommLose(A error (Fuse) SciCommLose(Fu Inconsistent ID155 software versions USB fault ID156 SoftVerError ID157 ID158 ID161 ForceShutdown ForceShutdown ID162 RemoteShutdown RemoteShutdown ID163 Drms0Shutdown Drms0 shunt down...
  • Page 62 SOFAR 250/255KTL-HV User Manual ID174 FanFault6 Fan 6 Alarm ID175 FanFault7 Fan 7 failure Meter ID176 MeterCommLose communication failure ID177 Reserved ID178 Reserved ID179 Reserved ID180 Reserved ID181 Reserved ID182 Reserved ID193- StringFuse_Fault0 String fuse open ID224 circuit alarm ID225- Reserved ID240 8.2.

  • Page 63: Technical Data

    SOFAR 250/255KTL-HV User Manual 9.Technical Data 9.1. Input parameters (DC) Parameter SOFAR 250/255KTL-HV Max. input voltage 1500V Rated input voltage 1080V Start-up voltage 550V MPPT operating 500V~1500V voltage range Full power MPPT 800V~1300V voltage range Number of MPP trackers Number for DC inputs Max.

  • Page 64: Output Parameter (Ac)

    SOFAR 250/255KTL-HV User Manual 9.2. Output Parameter (AC) Parameter SOFAR 250KTL-HV SOFAR 255KTL-HV Rated output power 250kW 253kW 250kVA@30°C / 255kVA@30°C / Maximum apparent 235kVA@40°C / 235kVA@40°C / power 220kVA@50°C 220kVA@50°C Rated output current 162A 166A Max. Output current 180.5A...

  • Page 65: Performance Parameter

    SOFAR 250/255KTL-HV User Manual 9.3. Performance Parameter Parameter SOFAR 250KTL-HV SOFAR 255KTL-HV Max efficiency 99.01% European Weighted 98.8% efficiency MPPT efficiency >99.9% EN 61000-6-2, EN 61000-6-4 IEC62109-1/2, IEC62116, IEC61727, IEC-61683, Safety standard IEC60068(1,2,14,30) AS/NZS 4777, VDE V 0124-100, V 0126-1-1,...

  • Page 66: General Data

    SOFAR 250/255KTL-HV User Manual 9.4. General Data Parameter SOFAR 250KTL-HV SOFAR 255KTL-HV Topology Transformless Ambient temperature -30℃~+60℃ range Relative humidity 0%～100% DC Switch Cooling Smart forced air cooling Max.altitude 5000m(> 4000m derating) Mounting Wall mount Communication WiFi /GPRS /RS485/PLC/Bluetooth（optional） Display LCD&...

  • Page 67: Quality Assurance

    SOFAR 250/255KTL-HV User Manual 10. Quality Assurance Standard warranty period The standard warranty period of inverter is 60 months (5 years).There are two calculation methods for the warranty period: Purchase invoice provided by the customer: the first flight provides a standard warranty period of 60 months (5 years) from the invoice date;...
  • Page 68 SOFAR 250/255KTL-HV User Manual Invalid warranty clause Equipment failure caused by the following reasons is not covered by the warranty: 1) The "warranty card" has not been sent to the distributor or our company; 2) Without the consent of our company to change equipment or replace parts; 3) Use unqualified materials to support our company 's products, resulting in product failure;...
  • Page 69 ADD: 401, Building 4, AnTongDa Industrial Park, District 68,XingDong Community, XinAn Street, BaoAn District, Shenzhen, GuangDong.P.R. China Email: service@sofarsolar.com Tel: 0510-6690 2300 Web: www.sofarsolar.com...

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