SEIAPI PPA install grid connect guidelines
Contents
1. MEN as used in Australian and New Zealand e For safety it is recommended that the earthing connection is completed once the wiring of the array has been completed Se IRENA Bi See gt International Renewable Energy Agency k Communi ty GRID CONNECTED POWER SYSTEMS SYSTEM INSTALLATION GUIDELINES EARTHING GROUNDING of LV ARRAY e The connection of the earth should be on the inverter side of the PV array isolator switch This allows for the earth to be disconnected when the array is turned off in the event of an earth PV ARRAY INVERTER AC SP DC ISOLATOR i V A l I I I U N l i LJ E A U i LS A f FRAME EARTH NEG SYSTEM EARTHING PROTECTIVE EARTH TEN IRENA a A International Renewable Energy Agency Community GRID CONNECTED POWER SYSTEMS SYSTEM INSTALLATION GUIDELINES SHUTDOWN PROCEDURE e Ashutdown procedure shall be installed near the inverter or switchboard to ensure safe de energization of the system e The procedure should be e Turn off the a c Main Switch Inverter Supply Isolator at the switchboard and then the ac Isolator at the inverter then e Turn off the PV Array isolator at the Inverter e When undertaking any work on the array cabling between the array and inverter good practice is to disconnect a plug in the middle of each string so that the array is then de energised the gt y T IRENA B sn RR International Renewable E2. e EC61730 1 and IEC 61730 2 safety in construction and e EC61215 and IEC61646 design qualification and type approval or e UL Standard 1703 NE IRENA R za International Renewable Energy Agency Communi ity GRID CONNECTED POWER SYSTEMS SYSTEM INSTALLATION GUIDELINES PV ARRAY INSTALLATION In grid connected PV systems the solar array is generally mounted e Flat on the roof That is parallel to slope OR Integrated into the building OR e On an array frame that is tilted to fix the array at a preferred angle usually for flat roofs or ground mounted NET IRENA A Sse sr dire International Renewable Energy Agency GRID CONNECTED POWER SYSTEMS SYSTEM INSTALLATION GUIDELINES Modules in Same String Modules that are electrically in the same string must be all in the same orientation 6 SEIAPI fram SPC FFA 6 22 RENA D G a of the Pacific 2 International Renewable Energy Agency i kee Community GRID CONNECTED POWER SYSTEMS SYSTEM INSTALLATION GUIDELINES Orientation and Tilt e For best year round performance a fixed PV array should be mounted facing true north 10 in South Pacific and true south 10 in North Pacific at an inclination equal to the latitude angle or at an angle that will produce the best annual average performance taking into consideration seasonal cloud patterns local shading and environmental factors In the tropics this could vary due to the sun being bo
3. CABLE SELECTION Correctly sized cables in an installation will produce the following outcomes 1 There is no excessive voltage drop which equates to an equivalent power loss in the cables 2 The current in the cables will not exceed the safe current handling capability of the selected cables known as current carrying capacity CCC NET IRENA Bit Seen Of the Pacific International Renewable Energy Agency 3 Community GRID CONNECTED POWER SYSTEMS SYSTEM INSTALLATION GUIDELINES CABLE CURRENT RATING Selection PV String Cables e Ifa fault current protection device is located in the string then the string must be rated to carry at least that current For example if the fault current protection device is rated at 8A then the string cable will need to be rated at a minimum of 8A e f no fault current protection is provided then the string cable will be rated as e CCC 1 25 xl op X Number of Strings 1 Selection of PV Array Cables e The PV array cable should be rated according to e CCC2 1 25 x Ie pray fi SELAPI AV gt Fi SPC gt Sustainable Energy FT R Secretariat A ofthe Pacific International Renewable Energy Agency Community GRID CONNECTED POWER SYSTEMS SYSTEM INSTALLATION GUIDELINES CABLE CURRENT RATING SYSTEMS WITH SUB ARRAYS PV Sub array Cables e If a fault current protection device is located in the sub array cable the sub array cable must have a rating equ
4. Arant s RE Te FRE AA n SETAPTPPANSURE 6 SELAPI x a SPC Page U YI susarabie Energy y 4 Secretariat of the Pacific International Renewable Energy Agency z W PELLE x Community GRID CONNECTED POWER SYSTEMS SYSTEM INSTALLATION GUIDELINES STANDARDS FOR INSTALLATION In Australia and New Zealand the following standards are applicable AS NZS 3000 Wiring Rules AS 4777 1 Grid connect Installation AS NZS 5033 Installation of Photovoltaic PV Arrays AS NZS 1768 Lightning Protection AS NZS 4509 Stand alone Power Systems AS NZS 3008 Selection of cables AS NZS 1170 2 Wind Loads TET IRENA hp OF Susarabie Energy 4 of the Pacific International Renewable Energy Agency KZ A Community s STANDARDS FOR INSTALLATION 2 In USA PV systems must be in accordance with following codes and standards e Electrical Codes National Electrical Code Article 690 Solar Photovoltaic Systems and NFPA 70 Uniform Solar Energy Code e Building Codes ICC ASCE 7 e ULStandard 1701 Flat Plat Photovoltaic Modules and Panels e EEE 1547 Standards for Interconnecting distributed Resources with Electric Power Systems e ULStandard 1741 Standard for Inverter converters Controllers and Interconnection System Equipment for use with Distributed Energy Resources d SEIAPI aA bp SPC gt PT sustainable Energy 4 Secretariat 4 ofthe Pacific p International Renewable Energy Agency t
5. E an International Renewable Energy Agency Commu nity GRID CONNECTED POWER SYSTEMS SYSTEM INSTALLATION GUIDELINES CABLE CONDUIT INSTALLATION cont e All conduits and cables exposed to sunlight must be suitably UV rated Not all corrugated conduits are UV rated so if using corrugated conduit ensure that it is UV rated e Plastic cable ties are not suitable for cables in exposed situations They can also chaff the cables LE IRENA Bi Sree of the Pacific International Renewable Energy Agency ia Z Community GRID CONNECTED POWER SYSTEMS SYSTEM INSTALLATION GUIDELINES CABLES CONNECTED TO INVERTERS e Cables connected to the inverter must be mechanically secured in such a manner that they cannot be inadvertently unplugged from the inverter e This can be achieved by 1 having the inverter housed in an enclosure with cables suitably supported 2 the use of an inverter which has the cable connection area of inverter covered by a removable enclosure cover which protects the supported cables so that there are no exposed unsupported cable loops 3 The use of conduit and secure wall fittings d SEIAPI N sh SPC gt PT sustainable Energy 4 Secretariat of the Pacific p International Renewable Energy Agency te Community GRID CONNECTED POWER SYSTEMS SYSTEM INSTALLATION GUIDELINES a c and d c in enclosures switchboards e Connection of a c and d c components in the same enclosur
6. al to or greater than that ofthe fault current protection device e f no fault current protection device has been included then the current carrying capacity of the cable must be the greater of 1 25 x sum of short circuit currents of all other sub arrays VETE QB IRENA AR zzz R 7 fhe Pa International Renewable Energy Agency te Communi GRID CONNECTED POWER SYSTEMS SYSTEM INSTALLATION GUIDELINES CABLE CURRENT RATING SYSTEMS WITH SUB ARRAYS Cont PV String Cables e If sub array fault current protection is used the string cable rating will be the rated trip current of the sub array fault current device plus the fault current of the other stings in the sub array I 1 25 x lsc op X Number of Strings 1 trip subarray e If no sub array fault current protection device is used the string cable rating will be 1 25 x sum of short circuit currents of all other strings in the array 6 SELAPI N sh SPC ST ssanie reg 4 MB Secretariat of the Pacific p International Renewable Energy Agency te Community GRID CONNECT SYSTEM INSTAL VOLTAGE DROP ED POWER SYSTEMS LATION GUIDELINES e Cable losses between the PV array and the inverter should be as low as practical consistent with cable size and cost decisions to maximise system output it is recommended thatit is a maximum of 3 e It is recommended that the voltage drop between the inverter and the point of connection o
7. cal terrain This may require specific tests of the fixing substrate combination on that roof the SEIAPI Fa SPC u 7 Sustainable Energy 4 Secretariat L of the Pacific International Renewable Energy Agency CR Community GRID CONNECTED POWER SYSTEMS SYSTEM INSTALLATION GUIDELINES Roof Mounting 4 e The installer shall ensure that the array frame that they install has applicable engineering certificates verifying that the frame meets wind loadings for that particular location e The installer must follow the array frame suppliers manufacturers recommendations when mounting the array to the roof support structure to ensure that the array structure still meets wind loading certification shpe IRENA Bi Se EZ i of the Pacific International Renewable Energy Agency 3 c GRID CONNECTED POWER SYSTEMS SYSTEM INSTALLATION GUIDELINES Free Standing Array Must be wind rated to meet the wind loading for the region ELLE SEIAPI GA PA SPC sf Sustanabie Energy TE R N F Secretariat CA 4 ofthe Pacific International Renewable Energy Agency i Community GRID CONNECTED POWER SYSTEMS SYSTEM INSTALLATION GUIDELINES ROOF MOUNT ISOLATORS AND JUNCTION BOXES e Where roof mount isolators and or array junction boxes are mounted on roof the installer must ensure that the integrity of the IP rating is maintained and that no moisture can enter the isolator or junc
8. ch shall be mounted near the inverter e In some countries this isolator is typically a double pole d c rated circuit breaker e NOTE A breaker not rated for the open circuit d c voltage of the array and the d c short circuit current of the array shall not be used as the PV Array Isolator Polarised Breaker with markings at both ends of the breaker d SEIAPI R SPC OI susioravie tres FT Secretariat of the Pacific Community International Renewable Energy Agency PV ARRAY D C ISOLATOR If the double pole d c circuit breaker is polarised then the installer shall ensure that it is wired correctly Failure to wire correctly could lead to a fire when this isolator is operated in full sun Where an inverter allows more than one input from the array an isolator shall be installed on each input aia For all connectio Z g of the ent flow is to be the same whether the array is necte d to a ka op o a pe Preferred connection of array to a Polarised Double Pole DC Circuit Breaker with markings on bottom of CB Two Ways of Conn sf IRENA a an International Renewable Energy Agency Community ecting to a Polarised DC Breaker with markings only on bottom side GRID CONNECTED POWER SYSTEMS SYSTEM INSTALLATION GUIDELINES a c Isolator at Inverter Where the inverter is not adjacent to the switchboard to which it is connected an isolator shall be provided at the inverter so that a person operating the swit
9. ch has a clear view of any person working on the inverter WARNING DUAL SUPPLY WARNING RAN PAJO LAK ARRAY ON ROOF SEIAPI PS Z 4 SPC nabie Energy R N A gt Secretariat of the Pacific International Renewable Energy Agency iy A Community GRID CONNECTED POWER SYSTEMS 4 SYSTEM INSTALLATION GUIDELINES SOLAR SUPPLY ISOLATOR IN SWITCHBOARD e tisrecommended that the interconnection of the grid connected PV system and the buildings electrical system is undertaken at a switchboard or distribution board e This connection shall be at an a c solar supply isolator located on the switchboard or distribution board where the solar system is connected e This will be referred to as main switch inverter supply VETE IRENA of the Pacific International Renewable Energy Agency 3 Community GRID CONNECTED POWER SYSTEMS SYSTEM INSTALLATION GUIDELINES SOLAR SUPPLY ISOLATOR IN SWITCHBOARD 2 This isolator shall be lockable e A switch or isolator being lockable does not mean it needs a padlock or similar attached It means that it is able to have a tag or small plastic locking device inserted to allow a person to work on the system safely The intention is that the isolator locking device should include the installation of a tag sign saying DO NOT SWITCH ON PERSON WORKING ON SYSTEM or similar NE IRENA Bt Se of the Pacific International Renewable Energy Agenc
10. e Community LV vs ELV In the Australian standards Low Voltage LV is defined as 120V d c and above and Extra Low Voltage ELV is defined as below 120V d c In the USA standard anything above 60V d c is considered dangerous Typically all grid connect PV arrays are above 120V d c and hence considered LV LV is dangerous and can kill a person if they come into contact with live terminals SPC shp E GB IRENA i a International Renewa ble Energy Agency GRID CONNECTED POWER SYSTEMS SYSTEM INSTALLATION GUIDELINES DOCUMENTATION All complex systems require a user manual for the customer Grid connected PV systems are no different The documentation for system installation that must be provided is e List of equipment supplied e Shutdown and isolation procedure for emergency and maintenance e Maintenance procedure and timetable e Commissioning sheet and installation checklist e Warranty information e System connection diagram e System performance estimate e Equipment manufacturers documentation e Array frame engineering certificate e Array frame installation declaration and e Handbooks for all equipment supplied d SEIAPI gt FSE FAA SPC ST susanabie Energy WY Secretariat ofthe Pacific z te Z gt International Renewable Energy Agency Community GRID CONNECTED POWER SYSTEMS SYSTEM INSTALLATION GUIDELINES PV MODULES PV modules shall comply with the requirements of
11. e double insulated solar cable is used This cable is similar to that used for interconnecting the solar modules in the array e tis recommended that the cable is sized such that the maximum voltage drop between the array and the inverter is less than 3 d SEIAPI a 1 S SPC u PT Sustainable Energy FT Secretariat of the Pacific International Renewable Energy Agency Community GRID CONNECTED POWER SYSTEMS SYSTEM INSTALLATION GUIDELINES EARTHING GROUNDING of LV ARRAY e Ifthe system includes a non isolated transformerless inverter with no galvanic isolation then the PV module frames if metal should be earthed grounded This is known as protective earth ground e tis good practice that all array frames are earthed grounded It is required in the US standards e It is recommended that the earthing connection is completed once the wiring of the array has been completed fi SELAPI AV gt sh SPC gt IJ Sustainable Energy FT DR Secretariat A ofthe Pacific LE Z International Renewable Energy Agency te Community GRID CONNECTED POWER SYSTEMS SYSTEM INSTALLATION GUIDELINES EARTHING GROUNDING of LV ARRAY e Ifthe PV array is electrically earthed grounded that is either the positive or negative is earthed these arrays cannot be connected to a transformer less inverter with no galvanic isolation if the electrical wiring system incorporates the multiple earth neutral system
12. e should be segregated e d c wiring shall not be placed in a c switchboards 6 SEIAPI A Fa SPC OF Sustainable Energy z Secretariat A ofthe Pacific F International Renewable Energy Agency ta Community GRID CONNECTED POWER SYSTEMS SYSTEM INSTALLATION GUIDELINES WIRING OF LV ARRAYS e A dangerous situation occurs when the person installing the system is able to come in contact with the positive and negative outputs of the solar array or sub array when the output voltage is 60V d c or above e Most grid connected systems use approved solar modules which are connected using double insulated leads with polarised shrouded plug and socket connections e Therefore the dangerous situation is only likely to occur at e the PV Array isolator before the inverter e the roof top isolator if one exists and e the sub array and array junction boxes if exist fi SEIAPI gt ao FA SPC hN T Sustainable Energy w Secretariat of the Pacific International Renewable Energy Agency Community GRID CONNECTED POWER SYSTEMS SYSTEM INSTALLATION GUIDELINES WIRING OF LV ARRAYS Cont e To prevent the possibility of an installer coming in contact with live wires it is recommended practice that one of the interconnect cables in the middle of each string is left disconnected until all the wiring is complete between the array and the inverter Only after all isolators and other hard wired connections are c
13. ent and array open circuit voltage from the system e If the inverter is not mounted near the switchboard then there should be a sign in the switchboard stating where the inverter is located e Any junctions boxes used between the array and the inverter should have a sign Solar d c on the cover e There should be a sign on the switchboard stating what is the maximum d c array short circuit current and array open circuit voltage from the system e If the inverter is not mounted near the switchboard then there should be a sign in the switchboard stating where the inverter is located e Any junctions boxes used between the array and the inverter should have a sign Solar d c on the cover SEIAPI fa SPC LE IRENA Bie Seow of the Pacific International Renewable Energy Agency 3 Z Community GRID CONNECTED POWER SYSTEMS COMMISSIONING e Included with the guideline is an installation checklist which can be used by the installer when they have completed the installation to ensure they have met these guidelines e The commissioning sheets provided with the guidelines or similar document shall be completed by the installer A copy shall be provided to the customer in the system documentation and a copy retained by the installer 2 IRENA International Renewable Energy Agency M Secretariat of the Pacific Community
14. f a c supply should be kept as small as possible recommended lt 1 to minimise voltage rise within the installation and to limit inverter disconnection in areas where the grid voltage may be high to decrease incidents of overvoltage trips for inverters NE IRENA Bi Se a of the Pacific International Renewable Energy Agency Community GRID CONNECTED POWER SYSTEMS SYSTEM INSTALLATION GUIDELINES CABLE PROTECTION e All cables shall be electrically protected from fault currents that could occur e Each solar module has a maximum reverse current rating provided by the manufacturer If the arrays consists of parallel strings such that the reverse current flow into a string with a fault is greater than the maximum reverse current for the modules in that string then protection shall be provided in each string The protection can either be d c rated fuses or non polarised d c rated circuit breakers SEIAPI SPC SE GO IRENA m og of the Pacific International Renewable Energy Agency Community tee gt Maximum series fuse ratings e As per manufacturer Typical Electrical Characteristics BP 4175 BP 41652 Rated Power Pmax 175W 165W Warranted minimum power 170W 160W Voltage at Pmax Vmpl 35 4V 34 3V Current at Pmax lmp 4 9A 4 8A Short circuit current I 5 5A 5 4A Open circuit voltage Voo 44 5V 43 7V Temperature coefficient of lse 0 065 0 015 C Temperature coefficient of Voe 160420 mV C Temperat
15. nergy Agency te Z Community GRID CONNECTED POWER SYSTEMS SYSTEM INSTALLATION GUIDELINES METERING e Some inverters have on board metering of the instantaneous and cumulative output of the PV system e Where this is not the case and the electricity suppliers approved metering does not provide a recording of the exact energy output of the PV inverter system it is recommended that a separate meter is installed to ensure that the output of the PV inverter system is recorded e This will help if the customer thinks that they are not receiving as much energy as they expected d SELAPI gt Ft SPC ST Sisane Energy y 4 Secretariat of the Pacific unity SIE International Renewable Energy Agency ka C GRID CONNECTED POWER SYSTEMS SYSTEM INSTALLATION GUIDELINES SIGNAGE e A sign should be included in the switchboard stating WARNING DUAL SUPPLY and ISOLATE BOTH NORMAL AND INVERTER or Solar SUPPLIES BEFORE WORKING ON THIS SWITCHBOARD e The normal grid supply shall be labelled Main Swatch Normal Supply while the solar system isolating switch in the switchboard shall be labelled Main Switch inverter Supply y sur IRENA Bt Seow of the Pacific International Renewable Energy Agency ommunity GRID CONNECTED POWER SYSTEMS SYSTEM INSTALLATION GUIDELINES SIGNAGE Cont e There should be a sign on the switchboard stating what is the maximum d c array short circuit curr
16. ompleted should the interconnect in the middle of the array be connected TATT DISCONNECT ry SPC TY p MB Secretariat of the Pacific Biy Z Community International Renewable Energy Agency SEIAPI gt Sustainable Energy GRID CONNECTED POWER SYSTEMS SYSTEM INSTALLATION GUIDELINES WIRING OF LV ARRAYS Cont The installer shall ensure that all connectors used are waterproof and connected securely to avoid the possibility of a loose connection Only connectors of the same type from the same manufacturer are allowed to be mated at a connection point 6 su PR py SPC Energy lt w Secretariat A _ of the Pacific tay Z International Renewable Energy Agency Community GRID CONNECTED POWER SYSTEMS SYSTEM INSTALLATION GUIDELINES WIRING OF LV ARRAYS Cont e Solar module interconnect cables must be supported clear of the roof surface to prevent debris build up or damage to insulation 4 SEIAPI LR Fa SPC u 7 Sustainable Energy J z Secretariat of the Pacific International Renewable Energy Agency te Community GRID CONNECTED POWER SYSTEMS SYSTEM INSTALLATION GUIDELINES WIRING FROM LV ARRAYS TO PV ARRAY ISOLATOR NEAR INVERTER e The PV array cable shall be clearly identified as d c solar cable to ensure that it cannot be mistaken for a c cable e To avoid confusion it is recommended that between the array and the inverter single cor
17. sufficient clearance to facilitate self cleaning of the roof to prevent the build up of leaves and other debris e If fauna are a problem in the vicinity of the installation then consideration should be given to how to prevent them gaining access under the array see cable protection 5 sr IRENA Bi Sete EZ International Renewable Energy Agency Thy Community GRID CONNECTED POWER SYSTEMS SYSTEM INSTALLATION GUIDELINES Roof Mounting 2 e All supports brackets screws and other metal parts should be of similar material or stainless steel to minimise corrosion If dissimilar metals based on their galvanic rating are used then the two surfaces of the metals should be separated by using rubber washes or similar e Where timber is used it must be suitable for long term external use and fixed so that trapped moisture cannot cause corrosion of the roof and or rotting of the timber The expected replacement time should be stated in the system documentation Se G IRENA ts Secretariat of the Pacific International Renewable Energy Agency Community te east ge GRID CONNECTED POWER SYSTEMS SYSTEM INSTALLATION GUIDELINES Roof Mounting 3 e Any roof penetrations must be suitably sealed and waterproof for the expected life of the system If this is not possible then this must be detailed in Maintenance Timetable e All fixings must ensure structural security when subject to the highest wind speeds for the region and lo
18. th north and south at different times of the year e Note A minimum tilt of 10 is recommended to take advantage of self cleaning during rain periods e Horizontally mounted arrays will require additional maintenance cleaning e Between latitudes 10 South and 10 North the array should be tilted at a minimum of 10 degrees 6 SEIAPI gt FE D SPC ST susanabie Energy WY Secretariat ofthe Pacific z te Z gt International Renewable Energy Agency Community GRID CONNECTED POWER SYSTEMS SYSTEM INSTALLATION GUIDELINES Example of Orientation and Tilt true NORTH lt a true South ae Mo p Y le DE ANGLE E AE e g for PALUA Lat 70 Py le LATITUDE ANGLE e g for SUVA Lat 18 S The tilt angle should be approximately 18 The tilt angle should be approximately 7 However because of the cloud cover in the wet season a tilt angle of 20 would be better This would result ina greater energy output from the array in the dry season SPC Secretariat of the Pacific Community 2 IRENA International Renewable Energy Agency GRID CONNECTED POWER SYSTEMS SYSTEM INSTALLATION GUIDELINES Roof Mounting e f the modules use crystalline cells then it is preferable to allow sufficient space below the array gt 50mm or 2 inches for ventilation cooling This will be subject to the constraints of the customer or architect e It is important to allow
19. tions boxes e The roof mount isolator should be mounted vertically that is the switch is in a vertical position see Figures below The conduit entry points should be on the bottom face of the isolator e tis recommended that Junction boxes are NN mounted so that the access to the junction box is vertical not horizontal The conduit entry points should be on the bottom face of the isolator NE IRENA R pa Note Ensure that the switch does not shadenthtearraye Energy Agency 1 7 Community GRID CONNECTED POWER SYSTEMS SYSTEM INSTALLATION GUIDELINES INVERTER INSTALLATION If the inverter is designed to be installed behind the module a c module then consideration should be given to adequate ventilation and to the ease of replacement in the event of an inverter failure If a central inverter or inverters is used and the inverter enclosure is not weatherproof eg IP 54 rated then these should either be located inside the building or in an appropriate weatherproof enclosure The inverter heat sink must be clear of any obstacles to facilitate cooling of the inverter The manufacturers recommended clearances must be followed of the Pacific International Renewable Energy Agency Thy Community a sun IRENA Bt See GRID CONNECTED POWER SYSTEMS SYSTEM INSTALLATION GUIDELINES PV ARRAY d c ISOLATOR e A double pole load break PV array d c isolator swit
20. ure coefficient of Pmax 0 5 0 05 C 1000V T V Rheinland rating SEIAPI D z ZF era sf Sustainable Energy R N A i D Secretariat SE of the Pacific A 33 International Renewable Energy Agency RM A Community Explanatory Example e BP 4175 15A 5 5 mod reverse SC Solution Use Fuse BP 4175 B S m dieversa e Use say a 10 Amp fuse 15A GRID CONNECTED POWER SYSTEMS SYSTEM INSTALLATION GUIDELINES PROTECTION RATING e These fuses or d c circuit breakers non polarised shall have the following current rating 1 25 XI oF module 4 Fuse Rating lt 2 0 x I sc of module e f the array consists of sub arrays then each sub array shall be protected by a fuse or circuit breaker non polarised with the following rating 1 25 x lsc ofsub array Fuse Rating lt 2 0 xI sc of sub array NE GG IRENA AB zzz of the Pacific International Renewable Energy Agency Community GRID CONNECTED POWER SYSTEMS SYSTEM INSTALLATION GUIDELINES CABLE CONDUIT INSTALLATION e All cables used in the installation should be securely fixed in place to minimise any movement of the cable e Where the cables could be damaged then there should be suitable mechanical protection of the cables e Where the presence of fauna is expected to constitute a hazard either the wiring system shall be selected accordingly or special protective measures shall be adopted Shaun IRENA S
21. y 4 Z C it gt ommunity GRID CONNECTED POWER SYSTEMS SYSTEM INSTALLATION GUIDELINES SOLAR SUPPLY ISOLATOR IN SWITCHBOARD 3 e The cable between the switchboard and inverter requires protection so it is recommended that the isolator is a suitably rated circuit breaker the 7 y SEIAPI a Fi SPC lt h Sustainable Energy R N A DR Secretariat of the Pacific International Renewable Energy Agency Thy Community GRID CONNECTED POWER SYSTEMS SYSTEM INSTALLATION GUIDELINES Wiring Diagram man sumomon Az NORMAL SOLAR INVERTER SOLAR PV SUPPLY SUPPLY ARRAY SERVICE METERING MAIN MAIN AC DC LOAD FUSE GO SWITCH swircH ISOLATOR ISOLATOR ISOLATOR Az 26 r il 8 DOMESTIC CIRCUITS sw IRENA a ZRK International Renewable Energy Agency Community GRID CONNECTED POWER SYSTEMS SYSTEM INSTALLATION GUIDELINES Wiring Diagram atte ty I 202 IRENA Be ree of the Pacific International Renewable Energy Agency te Community tt te GRID CONNECTED POWER SYSTEMS SYSTEM INSTALLATION GUIDELINES CABLE INSTALLATION All cables shall be installed in a neat and tidy manner andin accordance with any national installation standards SEIAPI GE EE R SPC sf Sustanabie Energy YO R E NA s Secretariat of the Pacific vable En Community GRID CONNECTED POWER SYSTEMS SYSTEM INSTALLATION GUIDELINES
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