Service Manual - Power Electronics
Contents
1. 20 4 MAINTENANCE OF THE FREESUN STRING SUPERVISOR eene 21 INDEX 5 Io nrozm FREESUN POWER ELECTRONICS SAFETY INSTRUCTIONS IMPORTANT Read this manual carefully to maximise the performance of this product and to ensure its safe use In order to use appropriately the FREESUN please follow all instructions described in the installation manual referred to transport installation electrical connection and commissioning of the equipment Power Electronics accepts no responsibility or liability for any and all damage resulting from inappropriate use of the equipment The information contained in the installation guide must be observed when installing the inverter WARNINGS AND RECOMMENDATIONS If your device has the positive or negative pole of the photovoltaic system earth connected the following instructions must be considered The only point in the installation where the positive or the negative pole should be grounded is in the proper inverter through the 4 pole circuit breaker that is added to that effect It is important to note that if there was another grounded connection elsewhere in the installation in the panels themselves in the String Supervisor etc the protection provided by the additional circuit breaker would have NO effect Therefore it is recommended to revise periodically the insulation between the pole that is going to be grounded and the earth Like this it will be2. the heating fans must start and the air blown through the heat sink must heat up 1 Once the functional test of the heating has been conducted adjust the hygrostat back to the initial setting The value is specified with an adhesive label on the thumb wheel and in the circuit diagram 2 Release door contact switches remove the adhesive tape 3 Close the cabinet doors 3 10 Checking protective devices Depending on the switch cabinet model and production version the central inverters have several circuit breakers which need to be regularly checked for correct function You can locate the exact position and the number of circuit breakers using the reference designation of the components in the provided circuit diagram hi L Auxiliary circuit breakers Auxiliary control voltage circuit breaker Main AC circuit breaker Main AC on load disconnector 6 ON OFF kev switch FSITGOO17AI Figure 3 6 FREESUN internal view Inverter modules left and AC module right 18 MAINTENANCE OF THE STRING SUPERVISOR POWER ELECTRONICS FREESUN 3 10 1 Checking the Main AC Disconnector The main AC disconnector is connected with the door via an extension spindle The door itself has no contacts since it cannot be opened when the switch is activated FSITP0010A Figure 3 7 Main AC disconnector 3 10 2 Checking the DC Main Switch Each module in the Freesun inverter has a motor driven circuit breaker on th
3. conditions certain components can be very hot e g fuses transformer core sine wave filter heatsinks etc Safety gloves should always be worn when working near components that can be expected to be very hot We recommend using safety gloves during all work on the inverter TRIAL RUN Verify all parameters before operating the inverter Always apply voltage and current signals to each terminal that are within levels indicated within this manual Otherwise damage to the inverter may result OPERATION PRECAUTIONS Do not modify or alter anything within the inverter Before programming or operating the Freesun Series initialise all parameters back to factory default values WHO S ABLE TO APPLY THE FOLLOWING INSTRUCTIONS Only trained electricians approved by the responsible energy supply company may install and commission the inverters The instructions assume that you the installer are familiar with electrical installations and know the corresponding rules and regulations 8 SAFETY INSTRUCTIONS POWER ELECTRONICS FREESUN N CAUTION SPECIAL HAZARDS OF PHOTOVOLTAIC SYSTEMS Photovoltaic systems have special characteristics that can represent special hazards An active power source is connected This means that regardless to the operating mode of the inverter there may be voltage present either from the photovoltaic generator and or the FREESUN This is especially important to consider when disconne
4. for functionality and operating noise while the Freesun is stopped and the doors are opened You can use the test fan mode in order to check the interior Freesun fans In order to check the cabinet cooling fan HES series 1 Ensure that cabinet cooling fan is connected to a control voltage supply voltage and is supplied with power 2 Turn the thermostats down as far down as possible The fan start running as soon as the value of the set temperature has dropped below the set value 3 Once the functional test of the fans has been conducted adjust the thermostats back to the initial setting The value is specified with an adhesive label on the thumb wheel and in the circuit diagram 3 9 Checking the Heating and the Hygrostat Depending on the switch cabinet model and production version one or several heating models are installed di Switch the Freesun to Stop and open the doors 2 Ensure that the Freesun is connected to a control voltage supply voltage 3 Tape door contact switch to the On position 4 Turn the hygrostat down as far down as possible If the value is smaller than the current air humidity the heater is activated If the air humidity is too low a functional test of the heater cannot be carried out In this case the hygrostat does not switch on even if it is set to the minimum value TIO rozm MAINTENANCE OF THE FREESUN 17 FREESUN POWER ELECTRONICS If the hygrostat has been switched through
5. if necessary Check the insulation and the terminals on the assembly as well on the busbar for discoloration or degradation 11 Check all cable connections of the optional DC main switch for looseness and tighten them if necessary Check the insulation and the switch for discoloration or degradation 12 Check the shield connection of the communication link It must be hand tightened therefore a screwdriver is not suitable 13 Check the ground connection and the contact resistance to the ground potential 14 Check the overvoltage protector the visual display must be green Maintenance of the String Supervisor is completed 22 MAINTENANCE OF THE STRING SUPERVISOR 42 POWER ELECTRONICS x www powerelectronics es www power electronics com 24 Hours Technical Assistance 365 days a year 34 96 136 65 57 HEADQUARTER VALENCIA SPAIN C Leonardo da Vinci 24 26 Parque Tecnol gico 46980 PATERNA VALENCIA ESPA A Tel 902 40 20 70 Tel 34 96 136 65 57 Fax 34 96 131 82 01 BRANCHES BARCELONA Avda de la Ferrer a 86 88 08110 MONTCADA I REIXAC 5 Tel 34 96 136 65 57 Fax 34 93 564 47 52 CATALUNA LLEIDA C Terrasa 13 Bajo 25005 LLEIDA el 34 97 372 59 52 Fax 34 97 372 59 52 LAS PALMAS C Juan de la Cierva 4 35200 TELDE CANARIAS Tel 34 928 68 26 47 Fax 34 928 68 26 47 VALENCIA Leonardo da Vinci 24 26 46980 e PATERNA Tel 34 96 136 65 57 Fax 34
6. outlets of the FREESUN HES Series inverter Frame 1 MAINTENANCE OF THE FREESUN 15 Io0o rozm FREESUN POWER ELECTRONICS SOLAR INVERTER gt POWER BIEETRORIS AC MV INPUT DC LV INPUT AND OUTPUT o o 00 0 0 o o FRONT VIEW REAR VIEW FSDTDOO29BI Figure 3 5 Air inlets and outlets of the FREESUN HES Series inverter Frame 2 POATE ALIGUTCAMGS E 0000000000 FRONT VIEW REAR VIEW FSDTD0120AI Figure 3 5 Air inlets and outlets of the FREESUN HES Series inverter Frame 3 16 MAINTENANCE OF THE STRING SUPERVISOR POWER ELECTRONICS FREESUN 3 5 Checking the Inside of the Switch Cabinet 1 Check the inside of the switch cabinet for heavy dust deposits dirt moisture and water penetration from outside 2 If necessary clean the Freesun and employ suitable corrective measures 3 6 Checking the Power Cable Connections 1 Check all power cable connections for looseness and tighten them if necessary 2 Check the connectors and insulation for discoloration or degradation 3 If necessary replace any damaged connectors or corroded contacts 3 7 Checking the Safety Notices Check the safety notices and stickers on and in the switch cabinet and replace missing or damaged labels 3 8 Checking the Fans Depending on the switch cabinet model the following fans are available Cabinet cooling fan Interior rotating fan s Check all cooling fans
7. possible to detect a ground fault unwanted in other points of the installation This will prevent the circuit breaker from providing inappropriate protection due to eventual uncontrolled ground leakages In this manual safety messages are classified as follows N WARNING Do not remove the cover while the power is applied or the unit is in operation Otherwise electric shock could occur Do not run the solar inverter with the front door opened Otherwise you may get an electric shock due to the high voltage terminals Do not remove the cover except for periodic inspections or wiring even if the input power is not applied Otherwise you may access the charged circuits and get an electric shock Operate the switches with dry hands Otherwise you may get an electric shock Do not use cables with damaged insulation Otherwise you may get an electric shock Do not subject the cables to abrasions excessive stress heavy loads or pinching Otherwise you may get an electric shock 6 SAFETY INSTRUCTIONS POWER ELECTRONICS FREESUN N CAUTION Install the inverter on a non flammable surface Do not place flammable material nearby Otherwise fire could occur Disconnect the input power if the solar inverter gets damaged Otherwise it could result in a secondary accident or fire After the input power is applied or removed the inverter will remain hot for a couple of minutes Touching hot parts may
8. result in skin burns Do not apply power to a damaged inverter or to an inverter with parts missing even if the installation is complete Otherwise you may get an electric shock Do not allow lint paper wood chips dust metallic chips or other foreign matter into the inverter Otherwise fire or accident could occur N WARNINGS RECEPTION The Freesun is carefully tested and perfectly packed before leaving the factory n the even of transport damage please ensure that you notify the transport agency and POWER ELECTRONICS 902 40 20 70 International 34 96 136 65 57 or your nearest agent within 24hrs from receipt of the goods UNPACKING Make sure model and serial number of the solar inverter are the same on the box delivery note and unit Each solar inverter is supplied with a technical manual RECYCLING Packing of the equipments should be recycled For this it is necessary to separate different materials included plastic paper cardboard wood and deposit them on proper banks Waste products of electric and electronic devices should be selectively collected for their correct environmental management SAFETY INSTRUCTIONS 7 IOo0o rozm FREESUN POWER ELECTRONICS N CAUTION SAFETY Before operating the solar inverter read this manual thoroughly to gain and understanding of the unit If any doubt exists then please contact POWER ELECTRONICS 902 40 20 70 34 96 13
9. the tripping of the insulator monitor Maintenance work of the soft grounding is carried out after checking the insulator monitor Once tripped manually reset the failure via the button 3 11 Checking the Cable Feed of the Concrete Substations Freesun HES 1 Check the chamber and the air ducts of the concrete substations for contamination or damage The cable vault must be dry and dust free No insects or other animals may enter the cable vault Take appropriate measures if necessary 2 Check the ventilation An optimal ventilation of the inverters must be ensured at all times 3 The power grid is supplied via a medium voltage transformer which requires almost no maintenance work Regularly check whether oil has leaked 20 MAINTENANCE OF THE STRING SUPERVISOR POWER ELECTRONICS FREESUN 4 The String Supervisors are usually installed near the modules in the open air Depending on the system size an increased number of String Supervisors is required which must be taken into account during maintenance work In the following some steps are listed which serve as maintenance instruction FSITG0011A Figure 4 1 String Supervisor external view First check the installation site for accessibility inflammable materials and safe positioning and then make sure that the String Supervisor is attached to a horizontal installation and that a sufficient sun shading system is available CONTROL BOARD TERMINAL TERMINAL BR
10. 6 65 57 or your nearest agent Wear safety glasses when operating the inverter with power applied and the front cover is removed Handle the solar inverter with care according to its weight Install the inverter according to the instructions within this manual Do not place heavy objects on the inverter Ensure that the mounting orientation is correct Do not drop the inverter or subject it to impact The Freesun inverters contain static sensitive printed circuits boards Use static safety procedures when handling these boards Avoid installing the inverter in conditions that differ from those described in the Technical Characteristics section Apart from the FREESUN Control there are no control elements on the device The cabinet doors must only be opened for commissioning maintenance and troubleshooting as well as for data query and parameter setting The device is equipped with several fans for cooling To perform any work on the fans is required that the equipment is switched off as explained in the correspondent section This procedure should be taken into account for commissioning maintenance and repair work The device fans and the power unit create significant levels of operating noise In addition to this a fault in the device can lead to very high sound levels We recommend the use of ear protection when in the vicinity of the device for extended periods Immediately after isolating the device depending on the operating
11. 96 131 82 01 LEVANTE CASTELL N C Juan Bautista Poeta 2 Piso Puerta 4 12006 CASTELL N Tel 34 96 434 03 78 Tel 34 96 136 65 57 Fax 34 96 434 14 95 MURCIA Pol Residencial Santa Ana Avda Venecia 17 30319 CARTAGENA Tel 34 96 853 51 94 Fax 34 96 812 66 23 NORTE VIZCAYA Parque de Actividades Empresariales Asuar n Edificio As a 1 B Ctra Bilbao Plencia 48950 ERANDIO Tel 34 96 136 65 57 Fax 34 94 431 79 08 CENTRO MADRID Avda Rey Juan Carlos 98 4 C 28916 LEGAN S el 34 96 136 65 57 Fax 34 91 687 53 84 SUR SEVILLA C Averroes 6 Edificio Eurosevilla 41020 SEVILLA Tel 34 96 136 65 57 Fax 34 95 451 57 73 GALICIA LA CORU A Plaza Agramar 5 Bajo Perillo Oleiros 15172 LA CORU A el 34 96 136 65 57 Fax 34 98 163 45 83 INTERNATIONAL SUBSIDIARIES GERMANY Power Electronics Deutschland GmbH Dieselstrasse 77 D 90441 N RNBERG e GERMANY Tel 49 911 99 43 99 0 Fax 49 911 99 43 99 8 Power Electronics Australia Pty Ltd U6 30 34 Octal St Yatala BRISBANE QUEENSLAND 4207 P O Box AUSTRALIA 3166 Browns Plains Queensland 4118 AUSTRALIA Tel 61 7 3386 1993 Fax 61 7 3386 1997 BRAZIL Power Electronics Brazil Ltda Av Guido Caloi 1985 Galp o 09 CEP 05802 140 SAO PAULO BRASIL Tel 55 11 5891 9612 Tel 55 11 5891 9762 Power Electronics Chile Ltda Los Productores 4439 Huechuraba S
12. ANTIAGO CHILE Tel 56 2 244 0308 0327 0335 Fax 56 2 244 0395 CHILE Oficina Petronila 246 Casa 19 ANTOFAGASTA CHILE Tel 56 55 793 965 Power Electronics Beijing Room 509 Yiheng Building No 28 East Road Beisanhuan 100013 Chaoyang CHINA District BEIJING R P CHINA el 86 10 6437 9197 Fax 86 10 6437 9181 Power Electronics Asia Ltd 20 F Winbase Centre 208 Queen s Road Central HONG KONG R P CHINA Power Electronics Asia HQ Co Room 305 SK Hub Primo Building 953 1 Dokok dong Gangnam gu 135 270 KOREA SEOUL KOREA Tel 82 2 3462 4656 Fax 82 2 3462 4657 INDIA Power Electronics India No 26 3rd Cross Vishwanathapuram 625014 MADURAI Tel 91 452 434 7348 Fax 91 452 434 7348 P E Internacional Mexico S de RL Calle Cerrada Jos Vasconcelos 9 Colonia Tlalnepantla Centro MEXICO TlanInepantla de Baz CP 54000 MEXICO DF Tel 52 55 5390 8818 Tel 52 55 5390 8363 Tel 52 55 5390 8195 NEW Power Electronics Nueva Zelanda Ltd 12A Opawa Road Waltham CHRISTCHURCH 8023 7 P O Box 1269 CHRISTCHURCH 8140 ZEALAND Tel 64 3 379 98 26 Fax 64 3 379 98 27 Ma POWER ELECTRONICS 18o 8 AA AA AAN www power electronics com
13. EAKER STRING FUSES STRING FUSES OVERVOLTAGE PROTECTOR FSITG0012AI Figure 4 2 String Supervisor internal view MAINTENANCE OF THE STRING SUPERVISOR 21 Io nrozm FREESUN POWER ELECTRONICS 1 Check whether the enclosure is damaged and properly sealed 2 Make sure that the lid is securely in place and properly sealed Make sure that the cover locks are correctly closed they are closed under light pressure by means of a screwdriver until they lock into position 1 4 turning 3 Check whether there is condensation water in the device Wipe out the String Supervisor check from where the water intruded the device and take corrective measures 4 Check the pressure adjusting screw for dirt or damage and replace it if necessary 5 Check the Plexiglass covers above the string fuses 6 Check the safety notices on and in the device and replace them if they are damaged or no longer legible You can order new labels from Power Electronics AG 7 Visually check the existing fuses and tension springs on the fuse holders 8 In addition check the auxiliary voltage of 24 V at the connection terminals and the plug connectors it must be at least 21 V 9 Check all power cable connections for looseness and tighten them if necessary Check the connectors and insulation for discoloration or degradation Replace any damaged connectors or corroded contacts 10 Check all string cable connections for looseness and tighten them
14. NCE TASK MAINTENANCE INTERVAL RECOMMENDED Check all power and string cable connections for looseness and tighten them if necessary Check the connectors and insulation for 12 months discoloration or degradation If necessary replace any damaged connectors or corroded contacts Check the String Supervisor fixation 12 months Check whether the enclosure is damaged and properly sealed 12 months Make sure that the cover locks are correctly closed They are closed under light pressure by means of a 12 montas screwdriver until they lock into position 1 4 turning Check whether there is condensation water in the Ja nonihs device Check the pressure adjusting screw for dirt or ip manine damage and replace it if necessary Check the plexiglass covers above the string fuses 12 months Check the safety notices on and in the device and replace them if they are damaged or no longer 12 months legible Visually check the existing fuses and tension Pnie springs on the fuse holders Check the ground connection and the contact o resistance to the ground potential Check the overvoltage protector the visual display 12 months must be green 12 INTRODUCTION POWER ELECTRONICS FREESUN 3 MAINTENANCE OF THE FREESUN 3 1 Identifying the Freesun You can identify the Freesun by using the type label which is located on the right side of the Freesun TYPE LABEL INVERTER MODULES AC MOD
15. ULE FSITG0001BI Figure 3 1 General view of the FREESUN HE and type label location 3 2 Reading out Historical Data and Errors A regular check of the plant operation is necessary to recognize possible failures which have no alarm function Furthermore plant operation might be improved by analyzing the plant data Deviations from the optimum operation can result in yield losses and thus in a reduction of the plant s profitability Depending on the plant size the error memory of the central inverter as well as the long term data of the data logger must be analyzed at least once a month Proceed as described in the user manual 3 3 Cleaning the Electronics Parts The electronic parts of the Freesun inverters are considerably well protected and thus require almost no maintenance work Only carry out a visual inspection and clean the circuit boards with a soft brush or a vacuum cleaner with a soft top part if there are dust deposits The cleaning equipment must be anti static and ESD compliant Do not use any hard or coarse brushes Do not use pressurized air MAINTENANCE OF THE FREESUN 13 Io nrozm FREESUN POWER ELECTRONICS 3 4 Cleaning the Protective Grids at the Air Inlets and Outlets This section describes how to clean the protective grids at the air inlets and outlets Exchanging the protective grids is only necessary in case of damage 3 4 1 Freesun HE In order to cool the inverter the ventilation system must be
16. cting particular parts of the system Very high DC voltages are present no zero crossing which in case of a fault or inappropriate use of fuses or plugs may lead to arcing The short circuit current of the photovoltaic generator is only slightly more than the maximum operating current and is also dependent on the level of the solar irradiation Ahighly branched generator array may be difficult to disconnect if a fault develops e g short circuit We recommend the extra use of external DC circuit breakers for disconnecting the inverter and or the DC main cables String Supervisors by Power Electronics have DC circuit breakers built in and are suitable for this purpose One circuit breaker should be allocated to each input of the FREESUN inverter as described in the standard VDE0100 part 7 712 and the VDI 6012 regulations Power Electronics must be informed of the required AC grid connection type The device contains capacitors on the AC and DC sides The discharge time of the capacitors is longer than 10 minutes For this reason it is required to wait longer than this time before making any operation or maintenance actions in the unit SAFETY INSTRUCTIONS 9 IO0 rozm FREESUN POWER ELECTRONICS 1 NOTES ON THIS MANUAL 1 1 Scope of Validity This document describes how to maintain the Freesun HE and HES central inverters It is valid for all switch cabinet versions the MV stations as well as their accessories
17. e DC side This switch is equipped with a circuit breaker a springpower storage device an off key and a position display Switch the Freesun to Stop and open the doors Ensure that the Freesun is connected to a control voltage supply voltage and is supplied with power Tape door contact switch to the On position Switch the Freesun to Start The DC switch is switched on and shifts to On position Switch the Freesun to Stop The DC switch trips and shifts to Off position Release door contact switches remove the adhesive tape Close the cabinet doors MAINTENANCE OF THE FREESUN 19 Io0o rozm FREESUN POWER ELECTRONICS 3 10 3 Checking the Fuses and Disconnectors 1 Visually check the existing fuses and tension springs on the fuse holders 2 Check all power cable connections for looseness and tighten them if necessary Check the connectors and insulation for discoloration or degradation Replace any damaged connectors or corroded contacts 3 Check all string cable connections for looseness and tighten them if necessary Check the insulation and the terminals on the assembly as well on the busbar for discoloration or degradation 4 If necessary lubricate the contacts The check of the fuses and disconnectors is completed 3 10 4 Checking the Overvoltage Arrester Depending on the switch cabinet model and production version the central inverters have several overvoltage p
18. free of any obstructions to ensure the required inlet ventilation and heat dissipation The specified minimum clearances must be maintained to ensure the proper ventilation and heat dissipation as described in the previous sections The permissible ambient temperature in order to ensure the correct operation and maximum feed in performance is between 20 C and 50 C The exhaust air waste heat is blown out through the rear part of the inverter FSITP0009A Figure 3 2 Ventilation for the FREESUN HE Series inverter 14 MAINTENANCE OF THE STRING SUPERVISOR POWER ELECTRONICS FREESUN 3 4 2 Freesun HES The inverters are installed inside concrete cabinets for the Freesun HES Series The concrete cabinet for outdoor installation is specifically designed with vents that match the air inlets and outlets of the inverter Do not cover these air vents to allow fresh air to flow inside the inverter The stations are equipped with several doors and windows which serve as inverter ventilation The doors and windows have protective grids and must also be cleaned Depending on the size of the station the form and size of the openings may vary This depends on the inverters used in the station FSITG0013A Figure 3 3 Rear view of the FREESUN HES Series inverter inside the concrete cabinet AC MV INPUT DC LV INPUT AND OUTPUT 0000 FRONT VIEW AC MV INPUT AND OUTPUT REAR VIEW FSDTD00288 Figure 3 4 Air inlets and
19. frees un SOLAR INVERTER Solar Inverter Service Manual f POWER ELECTRONICS frees un SOLAR INVERTER Modular Solar Inverter HE and HES Series Service Manual Edition August 2011 FSMSO1AI Rev A FREESUN POWER ELECTRONICS POWER ELECTRONICS FREESUN SAFETY SYMBOLS Always follow safety instructions to prevent accidents and potential hazards from occurring WARNING This symbol means improper operation may results in serious personal injury or death be given because dangerous voltage may be present Maintenance Identifies shock hazards under certain conditions Particular attention should CAUTION operation should be done by qualified personnel Identifies potential hazards under certain conditions Read the message and follow the instructions carefully be given because dangerous voltage may be present Identifies shock hazards under certain conditions Particular attention should Edition of August 2011 This publication could present technical imprecision or misprints The information here included will be periodically modified and updated and all those modifications will be incorporated in later editions To consult the most updated information of this product you might access through our website www power electronics com where the latest version of this manual can be downloaded SAFETY SYMBOLS Io nrozm FREESUN POWER ELECTRONICS Revisions Date Revision Descript
20. h depending on inverter size Cleaning the protective grids at the air inlets and 12 months outlets Checking of dust dirt humidity and water leaks inside the inverter 12 months Clean the Freesun if necessary Check all power cable connections for looseness and tighten them if necessary Check the connectors and insulation for discoloration or degradation If necessary replace any damaged connectors or corroded contacts Check the safety notices and stickers on and in the switch cabinet and replace missing or damaged 12 months labels Check all cooling fans for functionality and 12 months i l 12 months operating noise Checking the heating and the hygrostat 12 months Checking protective devices e Line circuit breaker 12 months e Power switch Checking the fuses and disconnectors 12 months Checking the overvoltage arrester 12 months Checking of main AC voltage and auxiliary 230 V 45 onthe and 24 V voltages Checking of over temperature function 12 months Checking of grounding operation GFDI 12 months Changing intervals of heating and ventilation parts 12 months Checking of the cable feed and air inlet outlet of the 12 months concrete cabinet Maintenance interval could be shorter if required by location or ambient conditions Io0o rozm INTRODUCTION 11 FREESUN POWER ELECTRONICS 2 2 Maintenance Tasks in Freesun String Supervisor MAINTENA
21. ion 08 08 2011 A First Edition The equipment and technical documentation are periodically updated Power Electronics reserves the right to modify all or part of the contents of this manual without previous notice POWER ELECTRONICS FREESUN SAFETY INSTRUGTIONS nenne 6 i NOTES ON THIS MANUAL een le 10 1 SCOPE Of Validity Eee 10 12 Tarfget GroUp a tia 10 1 3 DOCUMENTO ocio EE 10 2 INTRODUCTION clicca ia 10 2 1 Maintenance Tasks in Freesun Inverter i 11 2 2 Maintenance Tasks in Freesun String SUpervisor i 12 3 MAINTENANCE OF THE FREESUN ernannt nan tranne na nouae Eman Re uas restan 13 3 1 Identifying the FreesuN ooconocccnnnnocccnonrcccornnconcnnnnncnnnnne nen rnncn nennen nnne nnn nnne nenne nnne 13 3 2 Reading out Historical Data and Errors nee nn rna n rna rna 13 3 3 Cleaning the Electronic Parts nennen neret 13 3 4 Cleaning the Protective Grids at the Air Inlets and Outlets een 14 3 5 Checking the Inside of the Switch Cabinet 17 3 6 Checking the Power Cable Connections nnnnn en nn nanna n nn 17 3 7 Checking the Safety Notices nennen nennen 17 3 8 Checking the Fans i en erra ii i 17 3 9 Checking the Heating and the Hygrostat i 17 3 10 Checking Protective DEVices ii 18 3 11 Checking the Cable Feed of the Concrete Substations Freesun HES
22. rotectors which need to be regularly checked for correct function You can locate the exact position and number of overvoltage protectors using the reference designation of the components in the provided circuit diagram The overvoltage protectors are inspected visually and by means of measurements 1 Visual inspection of the arrestor for optical signs of wear 2 Check the operating readiness of the arrester via the function and fault signaling A of the protection path which is free of operating current Visual display green Overvoltage protector is ready for operation Visual display red Overvoltage protector defective 3 10 5 Maintaining the Insulator Monitor The GFDI is subject to aging caused by wear of the contacts every time they are tripped Due to aging sensitivity is reduced Check the insulation of the PV generator in regular maintenance intervals in order to ensure the functionality of the insulator monitor 1 Visual inspection of the insulator monitor Remove possible dirt or dust deposits by using a vacuum cleaner or with compressed air 2 Pulse test mode in order to verify the correct performance of the insulator monitor The plant operator determines the insulation test of the entire plant In case the mechanical or optical check is not fulfilled or in accordance with the maintenance protocol the insulator monitor must be replaced Replacement is also necessary after at least after 100 ground faults which led to
23. such as Freesun String Supervisor 1 2 Target Group This document is for installers and operators of a Freesun It includes a description of the maintenance of the Freesun the intervals and the maintenance work The appropriate maintenance protocol describes the replacement intervals of the components that need to be replaced 1 3 Documentation The documents listed below are included in the scope of delivery for your Freesun The following information is contained in these documents Installation manual hardware installation and commissioning manual User manual programming and software manual Circuit diagrams Technical data sheets 2 INTRODUCTION The Freesun the string supervisor units and the communication units must be maintained at regular intervals Maintenance includes the following activities Inspection of wearing parts and replacement if necessary Functional test of components Inspection of contact joints Cleaning of cabinet interior if necessary Ambient conditions The maintenance interval depends on the location and the ambient conditions A device installed in a dusty environment requires more frequent maintenance than recommended The maintenance interval is to be adapted accordingly 10 INTRODUCTION POWER ELECTRONICS FREESUN 2 1 Maintenance Tasks in Freesun Inverter MAINTENANCE TASK MAINTENANCE INTERVAL RECOMMENDED Reading of historical data and errors 1 mont
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