Service Manual
Contents
1. u 19 3 9 Checking the Eans eter Ee Roe eo nume sees Ree cR ER 19 3 9 Checking Protective 2 neret 20 INDEX 5 Z m o FREESUN HEC UL amp HEC UL SERIES POWER ELECTRONICS IMPORTANT SAFETY INSTRUCTIONS SAVE THESE INSTRUCTIONS This manual contains important instructions for FREESUN HEC UL and HEC UL by Power Electronics that shall be followed during installation and maintenance of the solar inverter IMPORTANTI Read this manual carefully to maximize the performance of this product and to ensure its safe use and installation In order to properlv use the FREESUN inverter follow all instructions described in the installation manual referred to transport installation electrical connection and commissioning of the equipment Power Electronics accepts no responsibilitv or liabilitv for anv and all damage resulting from inappropriate use of the equipment The information contained in the installation guide must be observed when installing the inverter IN WARNING The Freesun inverter system presents a SHOCK HAZARD Read and retain the Installation Manual for future reference Before installing the Freesun inverter read all instructions cautionary markings and other appropriate sections of this manual Failure to follow these warnings could result in severe shock or even death Exercise extreme caution at all times to prevent2. e CSA 22 1 12 PERSONAL PROTECTION EQUIPMENT PPE REQUIREMENTS PPE is required for repair and maintenance of a Freesun inverter PPE includes but is not limited to e Hard Hat e Safety Glasses e 100 cotton long pants no shorts no synthetic materials e Electrical Hazard EH rated safety shoes e Leather work gloves e long sleeve shirt no synthetic materials e Earprotection Refer to OSHA 29CFR 1910 137 for Personal Protection Equipment PPE for working with high voltage electrical equipment OPERATOR SAFETY CAUTION The inverter operates at a high voltage 1 000Vdc maximum Do not touch the DC input terminals or cables Touching the DC terminals may result in personal injury or death The system has sufficient energy to sustain an arc flash De energize the equipment prior to any maintenance procedure Always wear Personal Protective Equipment PPE while maintain equipment that is exposed and energized Always use insulated tools Always follow proper lockout tagout procedures Operating or maintaining energized equipment without appropriate PPE and insulated tools and without following proper lockout tagout procedures may result in personal injurv or death SAFETY INSTRUCTIONS Z m o FREESUN HEC UL amp HEC UL SERIES POWER ELECTRONICS A WARNING Do not remove the protective panels except for periodic inspections or wiring even if the input power is not applied Othe
3. 2 INSTRUMENT OF Or 2 5 ELEMENT INSPECTION g INSPECTION METHOD CRITERION MEASUREMENT 2 z E lt Ambient Are the ambient temperature Temperature Thermometer conditions and the humiditv within 0 External measurement 40F 1 220F 20 C to 50 C Hygrometer specification Datalogger Module Ale there normal o Visual and audible There are no anomalies noises or vibrations Measure the displayed Input and is theinput and output power voltage between terminals Digital multimeter af Ut bower 0 L1 L2 L3 between Tester m positive and negative Display DC poles Verify power connections one week after start up Measure the temperature and Annually check that the power Infrared Power Are the Power terminals connections temperatures are 0 torque of the power thermometer E connections correctly fastened connections homogeneous and below 70 C Torque ke lt Check that the bolts are torqued q y properly as indicated in the manual Check sealing on the doors o Check doors gratings and Visual check No anomaly cabinet about visual o damages i If the cabinet paint is scratched Cabinet Check cabinet paint abou t o Visual check or removed it could appear A visual damage or corrosion l Integrity oxide corrosion cleanness Check the safety notices and Replace missing or damaged stickers on and in the switch o bond g 9 No anomaly cabinet Check the bottom
4. LLEIDA Tel 34 97 372 59 52 Fax 34 97 372 59 52 LAS PALMAS C Juan de la Cierva 4 35200 TELDE Tel 34 928 68 26 47 Fax 34 928 68 26 47 VALENCIA Leonardo da Vinci 24 26 Parque tecnol gico e 46980 e PATERNA Tel 34 96 136 65 57 Fax 34 96 131 82 01 CASTELL N C Juan Bautista Poeta 2 Piso Puerta 4 12006 CASTELL N Tel 34 96 136 65 57 MURCIA Pol Residencial Santa Ana Avda Venecia 17 30319 CARTAGENA Tel 34 96 853 51 94 Fax 434 96 812 66 23 VIZCAYA Parque de Actividades Empresariales Asuar n Edificio As a 1 Ctra Bilbao Plencia 48950 ERANDIO Tel 34 96 136 65 57 Fax 34 94 431 79 08 MADRID Avda Rey Juan Carlos I 98 4 C 28916 LEGAN S Tel 34 96 136 65 57 Fax 434 91 687 53 84 SEVILLA C Arquitectura Bloque 6 Planta 5 M dulo 2 Parque Empresarial Nuevo Torneo 41015 SEVILLA Tel 34 95 451 57 73 Fax 34 95 451 57 73 INTERNATIONAL SUBSIDIARIES Power Electronics Deutschland GmbH Dieselstrasse 77 D 90441 N RNBERG e GERMANY Tel 49 911 99 43 99 0 Fax 449 911 99 43 99 8 Power Electronics Australia Pty Ltd U6 30 34 Octal St Yatala BRISBANE QUEENSLAND 4207 P O Box 6022 Yatala DC Yatala Qld 4207 AUSTRALIA Tel 61 7 3386 1993 Fax 61 7 3386 1993 Power Electronics Brazil Ltda Av Imperatriz Leopoldina 263 conjunto 25 CEP 09770 271 SAO BERNARDO DO CAMPO SP BRASIL Tel
5. connection metal panels about pools o Visual check No anomaly dust or rubbish Conductor Is the conductor corroded 0 Cable Is the isolation of the cable Visual check No anomalv damaged2 o Fuses Is there anv fuse melted2 0 Visual check No anomaly Disconnect the output power Check the resistance value cables of the inverter and Digital multimeter IGBT s module between each one of the measure the resistance value 5 ester terminals between L1 L2 L3 lt gt DC g DC with a tester gt 10kQ 2 Have fluid leaks been x Correct observed Is the capacitor o Visual check No anomaly Instrument for 2 capacitor well fastened Is any dilation Measure the capacitance with Capacitance higher than 85 of measuring lt p or retraction sign observed a proper instrument rated capacitance capacity Measure the capacitance 9 Is there any liquid leak o Visual check No anomaly Infrared H Inductances Is there anv overheated Measure the surface and Check that the temperature is thermometer 2 point o connectors temperature homogeneous and below 70 C i Check for visual damage o Visual check No anomaly Infrared 9 Transformer Is there overheated Measure the surface and Check that the temperature is thermometer point 0 connectors temperature homogeneous and below 70 AC contactor ihe contact or damaged Disconnect the power supply re the circuit breakers yer and circuit o Reset de circuit break
6. possible accidents These instructions are not meant to cover every safety situation nor replace any local or site specific safety procedure The information in this section is intended as a supplement to local or site specific procedures Power Electronics does not assume responsibility for the compliance or noncompliance to any code national or local for the proper installation of the Freesun inverter A potential for personal injury and or equipment damage exists if electrical codes and these instructions are not followed CAUTION Adhere to local site regulation Perform all electrical work in accordance with local national and or international electrical codes Use insulate tools to reduce the chance of short circuits while working with the equipment Keep all doors closed during equipment operation Always follow proper lockout tagout procedures 6 SAFETY INSTRUCTIONS POWER ELECTRONICS FREESUN HEC UL amp HEC UL SERIES SAFETY STANDARDS following standards apply to the components e UL 1741 UL Underwriters Laboratory Standard for Safety for Inverters Converters Charge Controllers Interconnection System Equipment ISE for Us in Utility Interactive grid connected Power Svstems e IEEE 1547 e IEEE 519 IEEE Recommended Practices and Requirements for Harmonic Control in Electric Power Svstems e NEC National Electric Code NFPA 70E e CSA 22 2 No 107 1 01
7. the Main AC Circuit Breaker The main AC circuit breaker is installed in the inverter in such way that it is not possible to touch electric parts It is also possible to manipulate it by opening the door s window Figure 3 4 Main AC circuit breaker MAINTENANCE OF THE FREESUN 21 Z m o FREESUN HEC UL amp HEC UL SERIES POWER ELECTRONICS 3 9 3 Checking the DC Fuses and Disconnectors of the Disconnecting Unit The Freesun HEC UL integrates the Disconnecting Unit in the same inverter s cabinet and the Freesun HEC UL integrates it in an annexed cabinet 1 2 Visually check the existing fuses and tension springs on the fuse holders 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 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 If necessary lubricate the contacts The check of the fuses and disconnectors is completed 3 9 4 Checking the DC Contactor Each module in the Freesun inverter has a DC contactor on the DC side 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 p
8. 55 11 5891 9612 Tel 455 11 5891 9762 Power Electronics Chile Ltda Los Productores 4439 Huechuraba SANTIAGO CHILE Tel 56 2 244 0308 0327 0335 7 Fax 456 2 244 0395 Oficina Petronila 246 Casa 19 ANTOFAGASTA CHILE Tel 456 55 793 965 Power Electronics Beijing Room 606 Yiheng Building No 28 East Road Beisanhuan 100013 Chaoyang District BEIJING R P CHINA Tel 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 Room 305 SK Hub Primo Building 953 1 Dokok dong Gangnam gu 135 270 SEOUL KOREA Tel 82 2 3462 4656 7 Fax 82 2 3462 4657 Power Electronics India No 25 4 Palaami Center New Natham Road Near Ramakrishna 625014 MADURAI Tel 91 452 452 2125 Fax 91 452 452 2125 Power Electronics Italia Srl Piazzale Cadorna 6 20123 MILANO ITALIA Tel 39 347 39 74 792 Power Electronics Japan KK Nishi Shinbashi 2 17 2 HF Toranomon Bldg 5F 105 0003 Minato Ku Tokyo Tel 81 03 6355 8911 Fax 81 03 3436 5465 Email salesjapan power electronics com P E Internacional Mexico S de RL Calle Cerrada de Jos Vasconcelos No 9 Colonia Tlalnepantla Centro Tlalnepantla de Baz CP 54000 ESTADO DE MEXICO Tel 52 55 5390 8818 Tel 52 55 5390 8363 Tel 52 55 5390 8195 Powe
9. Manual e LED Front panel display when unit is operational SYSTEM REPAIR AND TROUBLESHOOTING CAUTION Always follow established Lockout Tagout procedures Failure to comply can result in serious injury or death to personnel LOCKOUT TAGOUT Lockout tagout standards establish procedures to protect personnel from hazardous energy sources on equipment during service and maintenance OSHA 29 CFR part 1910 333 gives flexibility for facility operators to design a lockout tagout program that suits site specific needs Lockout tagout disables equipment producing hazardous amounts of electrical energy allowing servicing and maintenance personnel to safely perform their jobs Employees must be trained to understand and follow the hazardous energy control procedures e Use only lockout tagout devices authorized for particular equipment e Lockout tagout devices must be durable standardized and substantial Lockout tagout tags must identify authorized users to ensure the procedures are strictly adhered to In order to reduce the chance of inadvertent system energization the individual identified on the lockout tagout notices should be the only personnel in possession of keys that can be used to unlock the lockout devices SAFETY INSTRUCTIONS 11 Z m o FREESUN HEC UL amp HEC UL SERIES POWER ELECTRONICS GROUND FAULT WARNING If your installation has the positive or negative pole of the photovoltaic
10. V Before operating the solar inverter read this manual thoroughiv to gain and understanding of the unit If any doubt exists then please contact POWER ELECTRONICS 1 415 874 3668 or Vour nearest agent Handle the solar inverter with care according to its weight Install the inverter according to the instructions within this manual Do not place heavv 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 safetv procedures when handling these boards Avoid installing the inverter in conditions that differ from those described in the Technical Characteristics section The cabinet doors must only be opened for commissioning maintenance and troubleshooting as well as for data querv and parameter setting The device is equipped with several fans for cooling To perform anv 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 verv high sound levels We recommend the use of ear protection when in the vicinitv of the device for extended periods Immediatelv after isolating the device depending on the operating co
11. are available Cabinet cooling fan Interior rotating fan s Check all cooling fans 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 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 MAINTENANCE OF THE FREESUN 19 Z m o FREESUN HEC UL amp HEC UL SERIES POWER ELECTRONICS 3 9 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 FSITG0046C Figure 3 3 FREESUN internal view Inverter modules rear view left front view center and AC module right NUMBER DESCRIPTION 1 Auxiliary circuit Breakers Main module AC circuit brea
12. ata 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 17 Z m o FREESUN HEC UL amp HEC UL SERIES 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 The inverter module electronics and the AC module are cooled through a cooling system installed in each electronics compartment that moves the fresh and clean air from the bottom through the dust filters and fans to the top dust filters and exhaust fans Each fan presents a cooling capacity of 75m h The dust filters located in the inlet and outlet grating of the cabinet must be cleaned or replaced as part of the regularly scheduled maintenance The inverter can integrate two types of grating The frequency of maintenance should be according to the environmental site conditions replace the type 1 inlet and outlet filters follow the next
13. er with No anomaly placed in each module breakers damaged the test button Insulation Is there any earth leakage Disconnect the GFDI fuse resistance in ge Measure the resistance The resistance value is above Digital multimeter s the grounded pole grounded between the grounded phase 1kO Analog tester conductor damaged o installations and earth INTRODUCTION 15 rozm o FREESUN HEC UL amp HEC UL SERIES POWER ELECTRONICS S PERIOD ui INSPECTION gt 2 INSTRUMENT oK EI p mu ELEMENT INSPECTION E INSPECTION METHOD CRITERION MEASUREMENT 2 Ela Disconnect the power supply Are there any abnormal noises or oscillations OFF and rotate the fans Fan should rotate effortlessly Cooling fans o manually Is there any overheated No anomaly module Check the connections Check IGBT temperature ti 52 Ce Inlet and Outlet Are the gratings clogged by A 2 Gratings plastics or rubbish 0 No anomaly 8 Dust filters n fis 0 Visual check No anomaly Is the voltage and current Check die readi g instrument Check the specified values and Voltage meter Measurement o with an external displayed values correct the control values Current meter etc measurement gt 5 5 a Check that the energy values Historical data the historical data correct are correct o Check that there are not No anomaly a
14. ersion of this manual can be downloaded SAFETY SYMBOLS Z m o FREESUN HEC UL amp HEC UL SERIES POWER ELECTRONICS Revisions Date Revision Description 13 08 2014 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 HEC UL amp HEC UL SERIES INDEX IMPORTANT SAFETY INSTRUCTIONS U U 6 1 NOTES ON THIS MANUAL l ae a aa a acr crai nca OD cca ep ea Drusus 14 Tks Scopevot Validity ssd 5 2 a e A Man matteo ti 14 1 2 Target GIOUpzs eio temm ndr mee aee DS 14 1 3 Documentation eee eet e E Peace an 14 PER uiefee m 14 2 1 Maintenance Tasks in Freesun Inverter a 15 3 MAINTENANCE OF THE FREESUN I 17 3 1 Identifying the Freesun oie U u Pe entere 17 3 2 Reading out Historical Data and Errors 17 3 3 Cleaning the Electronic Parts nanna 17 3 4 Cleaning the Protective Grids at the Air Inlets and Outlets 18 3 5 Checking the Inside of the Switch Cabinet senser 19 3 6 Checking the Power Cable Connections 19 3 7 Checking the Safety Notices
15. frees un SOLAR INVERTER Outdoor Modular Solar Inverter HEC UL amp HEC UL Series Service Manual f POWER ELECTRONICS frees un SOLAR INVERTER Outdoor Modular Solar Inverter HEC UL 8 HEC UL Series Service Manual Edition August 2014 FSMSOSAI Rev A FREESUN HEC UL amp HEC UL SERIES POWER ELECTRONICS POWER ELECTRONICS FREESUN HEC UL amp HEC UL SERIES 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 Identifies shock hazards under certain conditions Particular attention should CAUTION be given because dangerous voltage may be present Maintenance 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 2014 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 v
16. heir left side the previous image is inverted Inverter modules switch Inverters ON OFF switch Main AC circuit breaker Disconnecting unit disconnects Internal in HEC UL Series or external in HEC UL It allows the connection and disconnection of It allows all the inverter modules the connection and disconnection of the AC grid It allows the connection and disconnection of the DC grid The inside components and distribution must be configured by the user The following table represents an example of the name plate located on the inverter Model Mod le FS1200CU10RO DC INPUT ENTR E DC Max Input DC Voltage Tension d entr e DC Max 1000V Min Voltage MPP Tension MPP 585V Max Voltage MPP Tension MPP Max 820V Max Input DC current Courant d entr e DC 2000A AC OUTPUT SORTIE AC Nominal output voltage Tension nominale de sortie 390V Frequency Fr quence 60Hz Nominal Power Puissance Nominale 1200kW Max Output Current Courant de Sortie Max 1776A Ambient Temperature Temp rature Ambiante 50 NEMA 3R MADE IN SPAIN SAFETY INSTRUCTIONS 13 Z mM o FREESUN HEC UL amp HEC UL SERIES POWER ELECTRONICS 1 NOTES ON THIS MANUAL 1 1 Scope of Validity This document describes how to maintain the Freesun HEC UL 8 HEC UL inverters It is valid for HEC V2 vers
17. ions 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 CD containing the Hardware and Installation manual and the Programming and Software manual 2 INTRODUCTION The Freesun inverter and the Disconnecting Unit 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 14 INTRODUCTION POWER ELECTRONICS FREESUN HEC UL amp HEC UL SERIES 2 1 Maintenance Tasks in Freesun Inverter 5 PERIOD B INSPECTION gt
18. ker Auxiliary control power supply and auxiliary power source circuit breakers Main AC Circuit Breaker AC Module contactor DC contactor Soft charge contactor DC measure protection fuses Main circuit surge arrester and fuses Main auxiliary circuit breaker OI Oc N A o 20 MAINTENANCE OF THE FREESUN POWER ELECTRONICS FREESUN HEC UL amp HEC UL SERIES 3 9 1 Switch OFF procedure 1 Turn off the AC module switch key by selecting the OFF position The AC contactor 5 the DC circuit breaker 6 of the modules will switch off and the bus discharge process is enabled during 30 seconds Wait 5 minutes for the bus caps to discharge 2 Disconnect the main AC circuit breaker 4 using its specific window 3 Disconnect main DC switch Disconnecting Unit Do not leave the inverter DC busbar energized Use site approved LOTO procedures 4 Open the inverter s doors and disconnect Auxiliary circuit breakers 3 10 AN CAUTION Voltage present on the DC bus DC busbars and fuses of the Disconnecting Unit remain connected to the photovoltaic cables Hazard voltages may be present The Freesun inverter contains capacitors on the AC and DC sides that must discharge once the device has been switched off After switching off there are dangerous accidental contact voltages present within the device the discharge time of the capacitors is 5 minutes 3 9 2 Checking
19. move 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 necessarv after at least after 100 ground faults which led to the tripping of the insulator monitor Maintenance work of the soft grounding is carried out after checking the insulator monitor Once tripped manuallv reset the failure via the button MAINTENANCE OF THE FREESUN 23 Z m o POWER ELECTRONICS www powerelectronics es www power electronics com 24 Hours Technical Assistance 365 days a year 34 96 136 65 57 HEADQUARTER 7 VALENCIA 7 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 CATALONIA CANARY ISLANDS LEVANT NORTH CENTRE SOUTH GERMANY AUSTRALIA BRAZIL CHILE CHINA KOREA INDIA ITALY JAPAN MEXICO MOROCCO NEW ZEALAND UNITED KINGDOM UNITED STATES OF AMERICA BRANCHES BARCELONA Avda de la Ferrer a 86 88 08110 MONTCADA I REIXAC Tel 34 96 136 65 57 Fax 34 93 564 47 52 LLEIDA C Terrasa 13 Bajo 25005
20. nd errors Are there any errors stored errors or they have been solved Note Maintenance interval could be shorter if required by location or ambient conditions 16 INTRODUCTION POWER ELECTRONICS FREESUN HEC UL amp HEC UL SERIES 3 MAINTENANCE OF THE FREESUN 3 1 ldentifving the Freesun Vou can identifv the Freesun bv using the tvpe label which is located on the right side of the Freesun Model Mod le FS1200CU10RO DC INPUT ENTR E DC Max Input DC Voltage Tension d entr e DC Max 1000V Min Voltage MPP Tension MPP 585V Max Voltage MPP Tension MPP Max 820V Max Input DC current Courant d entr e DC Max 2000A AC OUTPUT SORTIE AC Nominal output voltage Tension nominale de sortie 390V Frequency Fr quence 60Hz Nominal Power Puissance Nominale 1200kW Max Output Current Courant de Sortie Max 1776A Ambient Temperature Temp rature Ambiante 50 3 MADE IN SPAIN 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 d
21. nditions certain components can be verv hot e g fuses transformer core sine wave filter heatsinks etc Safetv gloves should alwavs be worn when working near components that can be expected to be verv hot We recommend using safetv gloves and glasses during all work on the inverter TRIAL RUN Verifv all parameters before operating the inverter Always apply voltage and current signals to each terminal that are within levels indicated in this manual Otherwise damage to the inverter mav result OPERATION PRECAUTIONS Do not modifv or alter anvthing within the inverter SAFETY INSTRUCTIONS 9 Z m o FREESUN HEC UL amp HEC UL SERIES POWER ELECTRONICS N SPECIAL HAZARDS OF PHOTOVOLTAIC SVSTEMS CAUTION 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 mav be voltage present either from the photovoltaic generator and or the FREESUN This is especiallv important to consider when disconnecting particular parts of the svstem Very high DC voltages are present no zero crossing which in case of a fault or inappropriate use of fuses or plugs mav lead to arcing The short circuit current of the photovoltaic generator is dependent on the level of solar irradiation and only slightly more than the maximum operating current A highly branched ge
22. nerator array may be difficult to disconnect if a fault develops g short circuit We recommend the extra use of an external DC disconnect and fuses for disconnecting the inverter to meet the requirements of NEC 690 These components are included in the Power electronics optional disconnecting unit Fuses should be allocated to each DC input of the FREESUN inverter as it is required by 690 Power Electronics covers this requirement with the Disconnecting Unit included in HEC UL and HEC UL Series inverters The Freesun HEC UL integrates the Disconnecting Unit in the same inverter s cabinet and the Freesun HEC UL integrates it in an annexed cabinet Power Electronics must be informed about the grid operator requirements device contains capacitors on the AC and DC sides The discharge time of the capacitors is 5 minutes Wait until the capacitors have been discharged before carrving out anv maintenance task 10 SAFETY INSTRUCTIONS POWER ELECTRONICS FREESUN HEC UL amp HEC UL SERIES INTEGRATED ELECTRICAL SAFETY FEATURES Freesun inverters have the following integrated electrical safety features e Software protection controls See section 3 3 and the Programming and Software manual e On Off switch Reference 1 of the figure 0 1 e DC Disconnect Switch Reference 3 of the figure 0 1 e Circuit breaker Reference 2 of the figure 0 1 e Anti islanding protection See the Programming and Software
23. osition Switch the Freesun to Start The DC contactor is switched on and shifts to On position Switch the Freesun to Stop The DC contactor trips and shifts to Off position Release door contact switches remove the adhesive tape Close the cabinet doors 22 MAINTENANCE OF THE FREESUN POWER ELECTRONICS FREESUN HEC UL amp HEC UL SERIES 3 9 5 3 9 6 Checking the Overvoltage Arrester The central inverters have several overvoltage protectors 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 Maintaining the Insulator Monitor GFDI is subject to aging caused by wear of the contacts every time they 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 Re
24. r Electronics Ekoakua Geea sarl N 184 Bloc Hay EL Massira Ait Melloul 80150 Agadir Maroc Tel 212 5 28 30 88 33 Mob 34 628 11 76 72 Email ventesmaroc power electronics com Power Electronics New Zealand Ltd 12A Road Waltham CHRISTCHURCH 8023 7 P O Box 1269 CHRISTCHURCH 8140 Tel 64 3 379 98 26 Fax 64 3 379 98 27 Power Electronics Corp UK Ltd Well House 80 Upper Street Islington LONDON 1 ONU UNITED KINGDOM Tel 00441494370029 Fax 34 961 318 201 Email uksales power electronics com Power Electronics USA Inc 505 Montgomery Street 11th Floor San Francisco CA 94111 UNITED STATES OF AMERICA Tel 415 874 3668 Fax 415 874 3001 Mov 415 376 1471 Email sales power electronics us POWER ELECTRONICS rca f www power electronics com
25. rwise vou mav access the charged circuits and get an electric shock Do not open the doors while the inverter is working Otherwise vou mav get an electric shock Do not open the doors when it is raining or when humiditv exceeds 95 Otherwise vou mav get an electric shock and the equipment could be damaged Operate the switches with drv hands Otherwise vou mav get an electric shock Do not use cables with damaged insulation Otherwise vou mav get an electric shock Do not subject the cables to abrasions excessive stress heavv loads or pinching Otherwise vou mav get an electric shock N CAUTION Install the inverter on a non flammable surface Do not place flammable material nearbv Otherwise fire could occur Disconnect the input power if the solar inverter gets damaged Otherwise it could result in a secondarv accident or fire After the input power is applied or removed the inverter will remain hot for a couple of minutes Touching internal hot parts mav result in skin burns Do not applv power to a damaged inverter or to an inverter with parts missing even if the installation is complete Otherwise vou mav get an electric shock Do notallow lint paper wood chips dust metallic chips or other foreign matter into the inverter Otherwise fire or accident could occur 8 SAFETY INSTRUCTIONS POWER ELECTRONICS FREESUN HEC UL amp HEC UL SERIES N CAUTION SAFET
26. steps Pull from the top right corner to unclip the grating Remove and clean replace the filter Place again the filter Clip again the grating pressing smoothly FSDTG0009A Figure 3 1 Filter clean replacement To replace the type 2 inlet and outlet filters follow the next steps Unscrew the three bolts that fix the grating to the electronics module Unscrew the two bolts that fix both parts of the grating Remove and clean replace the filter Place again the filter Screw again the grating parts Screw again the grating to the electronics module FSDTGOOS4A Figure 3 2 Filter clean replacement 18 MAINTENANCE OF THE FREESUN POWER ELECTRONICS FREESUN HEC UL amp HEC UL SERIES 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
27. system earth connected the following instructions must be followed The only point in the installation where the positive or the negative pole should be grounded is in the inverter through the Ground Fault Detector Interrupter GFDI that is added to that effect lt is important to note that if there was another grounded connection pole elsewhere in the installation in the panels themselves in the String Supervisor etc the protection provided by the additional GFDI would NOT be effective Therefore as part of scheduled maintenance it is recommended to inspect the insulation between the grounded pole and the earth This will prevent the GFDI from providing inappropriate protection due to uncontrolled ground leakage MARKS SYMBOLS AND CONTROLS ON THE INVERTER N CAUTION Do not ignore safetv warnings Failure to follow all safetv warnings and caution could result in equipment damage or injurv to personnel Inverter CAUTION labels are listed in the following table TEXT LOCATION Utility interactive Door CAUTION Risk of electric shock Normallv grounded conductors may be ungrounded and energized when a ground fault is indicated AC SWITCH AC module cabinet Rainproof Door CAUTION For Proper Circuit Connection Connect a minimum KVA rated isolating transformer between the output of the unit and the utilitv powerline connections The transformer is to be an isolation tvpe having Rear part of the door separate primar
28. v and secondarv windings CAUTION Risk Of Electric Shock Both AC and DC voltage sources are terminated inside this equipment Each Front part of each module circuit must be individuallv disconnected before servicing Door When the photovoltaic arrav is exposed to light it supplies a DC voltage to this equipment Use Copper Copper Clad Aluminum or Aluminum conductor Cable connections WARNING To maintain safety certification replace only with the same type and ratings of fuse Close to the fuses CAUTION Risk of electric shock from energy stored in capacitor Stop the inverter feeding into the grid and wait 5 minutes before the AC supplv disconnection Do not remove the cover before the AC and DC disconnection Front part of each module The following svmbols can be found in the inverter and used in this manual DC current 3 60Hz AC current Grounding electrode terminal On position Off position Grounding point inside the inverter 12 SAFETY INSTRUCTIONS POWER ELECTRONICS FREESUN HEC UL amp HEC UL SERIES The following figure shows the location of the inverter control features 8 Figure 0 1 Inverter controls FSDTG0041C Note For inverters with the AC module located in t
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