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ISMGT1xx User Manual

1. 3 seconds Vac XXX X V Fac XX X Hz 3 seconds Grid MPPT Mode M km b d Mode Derating Mode IMessage ____ i Grid MPP 3 seconds Vpv XXX V Wpv XXXX W lt 3 seconds Vac XXX Pac XXXX W 3 seconds Fac XX X Hz Iac XX X A Y lt 3 seconds Etoday XXX X kWh Htoday XX X Hr 3 seconds a XXX PEA 222 3 seconds Warning m Message 1 3 seconds Fig 3 4 1 54 Mode Fault Fault Mode S N XXXXXXXXXXXX 3 seconds SEQ Version X XX CUR Version X XX Mode Fault Error Message 3 seconds 3 seconds Idle Mode Mode Idle S N XXXXXXXXXXXX 3 seconds Y SEQ Version X XX CUR Version X XX 3 seconds Mode Idle Error Message LLL ISMGT1 inverter LCD display lay out 3 seconds 3 6 Communication There are two types of communication methods RS 232 and RS 485 supported in the ISMGT1 inverters that may be connected to an external computer or terminal equipped with either RS 232 and or RS 485 Only one type of the communication can be used at a time ISMGT1 inverter will automatically switch to RS 232 or RS 485 depends on the external communication interfaces without manual setting For the RS 485 interface it allows multiple inverters that can be connected to an external computer It allows only one inverter to be connected t
2. 41 3 1 OVERVIEWS a donare cada na e nOD dana DOR Op RO RE e ERU 41 3 2 OPERATION FEATURE eco ceret cet ee CET PTS CERE eR PE eC nali 43 3 3 BED INDICATION cs ise en ee RC RR ERR CHER UR HER ERE NO X EC NER ER RR NER cava 44 3 4 LED DISPLAY cessano toa eene eee atv deve dedico qud 46 3 6 COMMUNICATION nennen nnne nennen enhn enne tenens enne neret nennen 55 3 7 EXPLANATIONS OF ERROR MESSAGES ccessccesseeesecescecetecesseceneeeseeceseeeeseeceneeees 55 4 WARRANTY INFORMATION vsssrrersrresseressesee sese sinecienseseaseceezineceoo 59 5 TECHNICAL DOCUMENTATION eere e e eere eee ee en ee etn eee en ette secseeeeneczeseeneoe 60 5 1 OUTLINE DRAWING vases eid gerere evga ied irre eed edes ede AESTATE 60 5 2 EFFICIENCY abano na dies 62 5 3 DESRATING OPERATION oeste aaa ana 64 5 4 MAINTENANCE an a ethernet 67 5 4 1 Exchange of the Fuse eene nnns 67 54 2 Factory Service esc occae aee oT t acne 5 42 REMOVE the Inverter ian 5 4 2 2 Re install the Inverter List of Figures Fig1 1 1 Grid Connected Solar System 10 Fig 2 1 1 Clearances required for ISMGT1 inverter installation 18 Fig 2 2 1 Removal of the mounting bracket from
3. 500VDC 375VDC 3500 3000 250VDC W 2500 2000 1500 1000 500 0 Power 45 50 55 60 65 70 TA 80 85 Ambient Temp C Fig 5 3 3 Temperature derating curve of the ISMGT140 65 Power W 5500 5000 4500 4000 3500 3000 2500 2000 1500 1000 500 0 ER 500VDC 3 5NVDC 250VDC 45 50 55 60 65 70 75 80 85 Ambient Temp C Fig 5 3 4 Temperature derating curve of the ISMGT150 66 5 4 Maintenance 5 4 1 Exchange of the GFDI Fuse As shown in the figure 5 4 1 1 turn the cap of the GFDI fuse holder counter anti clockwise to open the cap and replace the GFDI fuse Before replacing the fuse turn off the DC AC disconnect switch and the breakers and wait for at least 5 minutes for system to discharge GFDI Fuse OPEN Fig 5 4 1 1 Open the cap of the fuse holder Turn OFF the DC AC disconnect switch and breakers Wait for at least 5 minutes Exchange the fuses Turn ON the DC AC disconnect switch and breakers WARNING A For continued protection against risk of fire replace only with the same type and ratings of fuse 600 VDC 1 A A WPK 67 5 4 2 Factory Service Once the product is diagnosed requiring a Factory Service the product could be removed and sent back using the original shipping box and the packing materials copy of the purchase invoice is also require
4. LED LCD Certifications EN50178 1 62103 VDE0126 1 1 RD1663 RD661 DK5940 G 83 12 Specifications for ISMGT140 and ISMGT150 Name Part number ISMGT140 ISMGT150 Grid output AC Grid voltage nominal 230 VAC Grid frequency nominal 50 Hz Maximum output power 4000 W 5000 W Maximum output current 17 4A 21 8A Output over current protection recommended d Grid output AC Maximum grid backfeed current Waveform True sine Power factor gt 0 99 0 norminal power Total Harmonic Distortion lt 3 DC Component 0 5 96 Phase Single Solar input DC MPP voltage range 200 550 VDC Maximum input voltage 600 VDC PV start voltage 235 VDC adjustable Maximum input current 22A 25A Maximum input short circuit 30A current Efficiency Maximum efficiency 96 5 96 96 5 96 European efficiency 95 8 96 95 8 96 Night time tare loss 0 5 W Environmental Operating temperature range 25 65 C 13 149 F Maximum full power operating Sa 58 C 136 4 F 54 C 129 2 F Relative humidity Max 95 Mechanical 13 Outdoor enclosure 1744 Cooling Cooling fan Input and output terminals Accept wire size of 4 to 16 mm 10 to 6 AWG Weight Shipping weight 28 kg 32 kg 61 7 Ib 70 5 Ib Dimensions HxWxD 768x454x210 mm 30 3x17 9x8 3 inches Sh
5. 19 2 Use the mounting bracket figure 2 2 2 as a template to mark the location of the holes to be drilled in the wall After drilling the holes the mounting bracket is then held against the wall and fastened to the wall with anchors as shown in the figure 2 2 3 A minimum of three 3 screws is required 25 9 84 r 18 7 08 12 5 4 92 4 of DT 7 2 76 RES Jaan 5 TT dT 5 TEF 8 FI S x x ci a j Li unit cm inch Fig 2 2 2 Inverter mounting bracket 20 T 600423 52 7 A Ps G0 n 8n 170 A66 93 Fig 2 2 3 Fasten the mounting bracket 21 3 Once the mounting bracket is fixed to the wall the inverter can be located and fastened to the mounting bracket Slide the inverter over the mounting bracket flanges let it slide down slowly until it is hooked in place Put the provided screw through the hole as shown in figure 2 2 4 below in order to fasten both inverter and the wiring box together to the mounting bracket Slide the mounting pins on the inverter over the hooks on the mounting bracket flange with mounting slots 120cm 100cm 47inch 39inch Ground Floor Ground Floor Ensure the inverter is seated properly on the mounting bracket 22 Fig 2 2 4 Hook Inverter on the mounting bracket and then fasten t
6. After the system enters the Grid MPP mode it will show the following information in order and repeatedly until the system goes to other operating mode The first screen shows the current operation mode Mode Grid MPP seconds Next messages are the actual real time data of the input output voltage and power The first 2 lines screen are for the PV arrays and the following screens are for the output Vpv is the incoming voltage from PV array Wpv is the incoming power of PV array in Watts Vac Pac lac and Fac are Voltage Power Current and Frequency that the inverter is feeding to the grid 49 seconds seconds seconds The following message shows the daily cumulated energy in kWh and period of time in hours for the power delivered to the grid since the inverter has been powered on and operated for current day Etoday XXX X kWh Htoday XX X Hr 3 seconds The following message shows the cumulated energy in kWh and period of time in hours for the power delivered to the grid up to date since the inverter has been installed and operated Eac XXXXXX X kWh H XXXXX Hr seconds Power De Rating Message There are five possible de rating causes each one displayed with a different message when power de rating is detected in Grid MPP mode Only one derating cause could be detected at the time Therefore only one of the following messages will be displayed if power de rating occurs Wh
7. Fig 5 1 8 Outline Drawing of ISMGT140DS 5 6 15005 61 Fig 5 2 1 European Efficiency of the ISMGT128 95 4 62 Fig 5 2 2 European Efficiency of the ISMGT138 95 7 62 Fig 5 2 3 European Efficiency of the ISMGT140 95 8 63 Fig 5 2 4 European Efficiency of the ISMGT150 95 8 63 Fig 5 3 1 Temperature derating curve of the ISMGT128 65 Fig 5 3 2 Temperature derating curve of the ISMGT138 65 Fig 5 3 3 Temperature derating curve of the ISMGT140 65 Fig 5 3 4 Temperature derating curve of the 5 150 66 Fig 5 4 1 1 Open the cap of the fuse 67 Fig 5 4 2 1 1 Remove the cover of the 69 Fig 5 4 2 1 2 Remove the DC and AC wires i 70 Fig 5 4 2 1 3 Keep the well wrapped DC and AC wires in store in the wiring box 70 Fig 5 4 2 1 4 Remove the screws and nuts bonding between the inverter and wiring Fig 5 4 2 1 5 Un hang the inverter carefully i 71 Fig 5 4 2 1 6 Locate the cover plate in place and fasten the screws 72 Fig 5 4 2 2 1 Re install the cover plate and fix it on the top of the
8. ISMGT140 I 1 1 1 1 1 I 1 I 1 I I BTV STR NTS TT EN i i _ 220 Vdc 350 a 450 Vde I 1 I 1 1 1 1 1 I 1 1 I I I I I I I 1 1 1 I I 1 I 1 I 1 I 1 I 1 Seo sess ees geese I 1 Sees pe eee gee ee ge qe lt lt I 1 I I 1 1 I 1 I I 1 I 1 I I 1 1 I 1 I I I dd Hs ai I I 1 80 I I 10 I I 70 I I 1 I I 1 I I 1 40 of Rated Output Power European Efficiency of the ISMGT140 I I 1 I 1 20 95 I 8 mr HM r I a 93 100 95 8 96 Fig 5 2 3 Efficiency of the ISMGT150 AOUPIONIE JO 0 90 8 70 50 40 of Rated Output Power European Efficiency of the ISMGT150 30 20 95 8 Fig 5 2 4 63 5 3 De rating Operation The occasions when the ISMGT1 inverter will take into account and then regulate the output and or restrict the input power to ensure the system is in safe operation are described in detail below Temperature The ISMGT1 inverter will monitor the temperature on t
9. compliance with the relevant electrical installation local norms issued State or distribution network operator DNO Correct grounding short circuit and or overcurrent protection must be provided to ensure operational safety Read all instructions and caution remarks in the manual before installation Switch off the circuit breakers before installation Keep dry when working the inverter When PV arrays are exposed to light they provide high energy Cover the arrays with opaque dark material before installation Check both AC and DC connections with digital voltmeter prior to any installation or removal procedures close the front cover before switching on the circuit breakers Install the inverter out of reach of direct sunlight rain or dust sources Risk of electrical shock may be contained even if no external voltage is present Allow at least 5 minutes for the inverter to discharge completely after disconnecting the AC and DC sources from the inverter before carrying out any operation on it The temperature on the external heat sink may be high during operation and cause burn injury if touched Pay attention to hot parts Prevent the risk of fire hazard do not cover or obstruct the heat sink or put flammable materials net to it Allow modification in your electrical system to be carried out only by the skilled and qualified electricians Repair and Maintenance The ISMGT1 inverter contains no user serviceabl
10. map img Fig 2 3 2 1 PV terminal connection The ISMGT1 inverter supports both negative and positive ground for PV strings connections The JP14 and JP15 jumpers are used for the settings of the negative and positive ground 31 PR CAUTION PV arrays provide Energy when exposed to light they suppli very high DC voltage Make sure safe working practices are followed WARNING Route the DC connection cables to the ISMGT1 inverters away from any possible hazard that could damage the cables WARNING Hazardous voltage is still present on the device after disconnection of all PV DC inputs Allow 5 minutes for the inverter to completely discharge the energy stored in capacitors 32 2 3 2 1 Connection of the DC wires for Negative Ground Arrays The ISMGT1 inverters are shipped with negative ground setting they are set as shown in the figure 2 3 2 1 1 The JP14 and JP15 jumpers are placed on the lower positions The red DC wire is connected to the DCIN terminal the black DC wire is connected to the DCIN terminal In this case the positive polarity of the DC input voltage from the PV string shall be connected to the terminal labeled UNGROUNDED CONDUCTOR and the negative polarity of the DC input voltage from the PV string shall be connected to the terminal labeled GROUNDED CONDUCTOR as shown in the figure 2 3 2 1 2 I m m m TEPPE Fig 2 3 2 1 1 Negative Ground Set
11. 2 3 3 4 Users shall open the front lid of the wiring box to switch the termination switch to ON position The termination switch default set is OFF DRO Femak RJA Pin 5 Pin 5 V Pin 2 Pin 3 3 lt Pin 2 Fig 2 3 3 3 RS 232 connection DEY Female 38 Termination Termination Termination ON OFF OFF Fig 2 3 3 4 RS 485 connection 39 2 4 Wiring inverter in parallel ISMGT1 inverters can be connected in parallel when more power is required In the parallel configuration each inverter shall connect to its own PV array It is not recommended to connect one PV array to more than one inverter This may cause the inverter to work abnormally The figure 2 4 1 below shows the connections between inverters and PV arrays in parallel configuration LR AE ME vos T gas Fig 2 4 1 Parallel configuration of inverter 40 3 Operation 3 1 Overview The ISMGT1 inverter will operate automatically Once the irradiation is strong enough to generate DC input voltage over the pre set threshold value the inverter turns on The inverter feeds power into the grid after input voltage rises over the PV start voltage and all necessary conditions are checked and fulfilled The inverter goes into Monitoring mode from the Grid MPP mode if the DC input voltage goes under the minimum MPP voltage If the DC input voltage falls below the pre set threshold value the
12. 45 connectors in the wiring box as shown in the figure 2 3 5 The AC terminal block is used to connect to the utility grid through a circuit breaker and distribution panel according to national and local requirements The DC terminal blocks are used to connect up to 4 PV strings in parallel in the wiring box The RJ 45 connectors are used for external communication to a remote computer terminal or another inverter in a Daisy Chain type connection 26 GFDI Fuse DC AC Ground Bar Terminal Blocks Terminal Blocks RJ45 L RJ45 R Fig 2 3 5 Wiring box front view 27 WARNING All electrical work shall be carried out in compliance with the relevant electrical norms issued by local distribution network operator DNO and follow the important safety instructions in this manual WARNING Under the DNO s inspection authority dedicated circuit breaker must be installed at the connection to the AC mains WARNING Make sure that suitable connecting cables are used for both the AC and DC wirings The cables must be choosen considering the Current capacity weatherproof and immune to temperature fluctuations and UV radiations etc Use 10 AWG to 6 AWG 90 C 194 F copper wire for all AC and DC wiring connections to ISMGT1 inverter WARNING PV arrays are energized when exposed to light Cover the arrays with opaque dark material during installation and wiring 28 2 3 1 Connection of the AC cable Use the following pro
13. ADQUARTERS Carlo Gavazzi Automation SpA Via Milano 13 I 20020 Lainate MI ITALY Tel 39 02 931 761 info gavazzi automation com Sense Switch CARLO GAVAZZI Components Automation Uab Carlo Gavazzi Industri Kaunas Kaunas LITHUANIA Carlo Gavazzi Controls SpA Belluno ITALY Contr EcoEnergy Further information on www gavazziautomation com www carlogavazzi com CARLO GAVAZZI Specifications are subject to change without notice Pictures are just an example MAN ISMGT ENG REV 02 01 11
14. CARLO GAVAZZI CARLO GAVAZZI ISMGT I xx Solar Inverter with HF Transformer Grid Connected Solar Inverter User Manual EcoEnergy Safety SAVE THESE INSTRUCTIONS This manual contains important instructions for inverter models ISMGT150 ISMGT140 ISMGT138 amp ISMGT128 that shall be followed during installation application and maintenance of the PV inverter Safety Precautions Safety Notes Only skilled and qualified personnel is allowed to carry out the installation wiring opening and repair of the ISMGT1 inverters Even if no external voltage is present the ISMGT1 inverters may still contain high voltage and the risk of electrical shocks The temperature of the heat sinks outside of the device could exceed 70 C 158 F during normal operation Risk of burn injury if touched The following general safety precautions must be observed during all phases of operation service installation and repair of this device Failure to comply with these precautions or with specific warnings elsewhere in this manual violates safety standards of design manufacture and intended use of the device The manufacturer assumes no liability for the customer s failure to comply with these requirements Safety Symbols To reduce the risk of injury and to ensure the continued safe operation of this product the following safety instructions and warnings are marked in this manual A GJ AN Warning risk of electric shock Th
15. RICA USA Carlo Gavazzi Inc 750 Hastings Lane USA Buffalo Grove IL 60089 Tel 1 847 465 6100 Fax 1 847 465 7373 sales carlogavazzi com CANADA Carlo Gavazzi Inc 2660 Meadowvale Boulevard CDN Mississauga Ontario L5N 6M6 Tel 1 905 542 0979 Fax 1 905 542 22 48 gavazzi carlogavazzi com OUR SALES NETWORK IN ASIA AND PACIFIC MEXICO Carlo Gavazzi Mexico S A de CN Calle La Montafia no 28 Fracc Los Pastores Naucalpan de Ju rez EDOMEX CP 53340 Tel amp Fax 52 55 5373 7042 mexicosales carlogavazzi com SINGAPORE Carlo Gavazzi Automation Singapore Pte Lid 61 Tai Seng Avenue 05 06 UE Print Media Hub Singapore 534167 Tel 65 67 466 990 Fax 65 67 461 980 MALAYSIA Carlo Gavazzi Automation M SDN BHD D12 06G Block D12 Pusat Perdagangan Dana 1 Jalan PJU 1A 46 47301 Petaling Jaya Selangor Malaysia Tel 60 3 7842 7299 Fax 60 3 7842 7399 OUR PRODUCTION SITES CHINA Carlo Gavazzi Automation China Co ltd Rm 2308 2310 23 F News Building Block 1 1002 Shennan Zhong Road Shenzhen China Tel 86 755 83699500 Fax 86 755 83699300 HONG KONG Carlo Gavazzi Automation Hong Kong lid Unit 3 12 F Crown Industrial Bldg 106 How Ming St Kowloon Hong Kong Tel 852 23041228 Fax 852 23443689 Carlo Gavazzi Ltd Zejtun MALTA Carlo Gavazzi Industri A S Hadsten DENMARK Carlo Gavazzi Automation Kunshan Co Ltd Kunshan CHINA HE
16. age is still present on the device after disconnection of all PV DC inputs Allow 5 minutes for the inverter to discharge the energy stored in capacitors completely WARNING Must confirm that all DC and AC circuit breakers are turned off for at least five 5 minutes before opening the front covers of the inverter and the wiring box and disconnect the DC and AC wires between them The wires been disconnected must be wrapped with an insulated material to prevent staff from the electrical shock WARNING After the inverter is removed from the mounting bracket the through holes of the wires on top of the wiring box must be covered with the cover plate that is attached on top of the wiring box to prevent the box from the water drops causing current leakages WARNING Not to keep any spare parts inside the wiring box TT OUR SALES NETWORK IN EUROPE AUSTRIA Carlo Gavazzi GmbH Ketzergasse 374 A 1230 Wien Tel 43 1 888 4112 Fax 43 1 889 10 53 office carlogavazzi at BELGIUM Carlo Gavazzi NV SA Schaarbeeklei 213 3 B 1800 Vilvoorde Tel 32 2 257 4120 Fax 32 2 257 41 25 sales carlogavazzi be DENMARK Carlo Gavazzi Handel A S Over Hadstenvej 40 DK 8370 Hadsten Tel 45 89 60 6100 Fax 45 86 98 15 30 handel amp gavazzi dk FINLAND Carlo Gavazzi OY AB Petaksentie 2 4 Fl 00661 Helsinki Tel 358 9 756 2000 Fax 358 9 756 20010 myynti carlogavazzi fi FRANCE Carlo Gavazzi Sarl Zac de Paris Nord II 69 rue
17. al converter over current DC DC converter hardware failed Auto test failed 58 4 Warranty information Warranty Period Refer to attached WARRANTY CARD 59 5 Technical Documentation 5 1 Outline Drawing ISMGT128DI 14 6 5 73 si 45 4 17 87 SG 5 4 92 9 4 3 7 75 2 29 6 unit cm inch Fig 5 1 2 Outline Drawing of ISMGT128DS 60 ISMGT138DI 14 6 5 73 4 7 2 76 4 5 1 77 19 7 48 BM unit cm inch Fig 5 1 5 Outline Drawing of ISMGT138DS ISMGT140DI and ISMGT150DI 17 6 6 91 p corem 75 2 29 6 18 4 7 25 unit cm inch iciency Eff 5 2 Efficiency of the ISMGT128 niese see Gar Jesse helse huse I 1 450 Vdc 99 97 D gt a es oc o6 59 oust Jo 80 90 70 50 40 of Rated Output Power 30 European Efficiency of the ISMGT128 95 4 96 10 Fig 5 2 1 Efficiency of the ISMGT138 q 1 1 1 T 1 1 1 T of Rated Output Power European Efficiency of the ISMGT138 95 7 99 Jo Fig 5 2 2 62 Efficiency of the
18. at the frequency on AC grid is too high H or too low L And after three 3 seconds the message shows the present frequency and the frequency that caused the system to go into Fault mode X HorL seconds seconds The message below shows the AC voltage is too high H or too low L And after three 3 seconds the message shows the present voltage and the voltage that caused the system to go into fault mode X HorL seconds Trip at Present seconds The message below shows the PV input voltage is too high 52 seconds Trip at Present 3 seconds Idle Mode The messages for Idle mode are as here after described First screen shows the operating mode and serial number of the inverter then follow the software versions of the sequential SEQ and current CUR controllers and then the error messages which are listed in the Error Message Table on section 3 7 Mode Idle SIN XXXXXXXXXXXX seconds SEQ Version CUR Version seconds seconds 53 Initial Mode Carlo Gavazzi ISMGT 15 3 seconds SEQ Version X XX CUR Version X XX 3 seconds S N X BR XX 3 seconds System Check Mode Insolation i 1 v Mode System Checking Monitoring Mode Node Monitoring gt Mode Monitoring NextConnect XXXs 3 seconds XXX V
19. cedure to wire the AC cables 1 Open the Distribution panel and switch off the circuit breaker used to connect the inverter to the grid 2 Use 10 AWG to 6 AWG 90 C 194 F copper wire for all AC wiring connections to the ISMGT1 inverter 3 Connect the cable GND to the screw of the ground bar labeled G3 L wire connected to L terminal N wire connected to ma N terminal E quipment ground wire connected to ground bar Fig 2 3 1 1 AC Terminal Block for AC cable connections 4 Connect the Grid Phase cable to the terminal labeled L of the AC terminal block 5 Connect the cable Grid Neutral to the terminal labeled N or Phase 2 of the AC terminal block NOTE the ISMGT1 inverters can also be connected on a Utility Grid without Neutral In this case providing the Voltage is within the specified limit of the Interface setting on this terminal it is possible to connect another Phase 6 Tighten the screws with a torque of 1 7Nm 15 6 in lb 7 Reconfirm that all connections have been performed properly as described above and all screws are properly tightened 29 gt gt e WARNING Reconfirm that the circuit breaker to the main utility is switched OFF before connecting the power cable from the breaker to the AC terminal block CAUTION Ensure that the total impedance of the grid and the interconnected AC power cable is less than 1 250 WARNING According to the relevant electrical norms and directives i
20. d to be included in the package Document There are some documents must be attached with the return product Please write as detail as possible 1 Serial number and machine type of the inverter 2 Brief descriptions of connected system 3 Fault message s on front panel or fault condition s 4 Canthe failure be reproduced How to reproduce it The following sections will describe the steps to remove and then to hook back the inverter with the wiring box remaining on the wall 68 5 4 2 1 Remove the Inverter ISMGT1 inverter is designed to be easily separated from the wiring box and removed from the mounting bracket It must wait for at least five 5 minutes for system to discharge after DC AC disconnect switch and breakers are switched OFF and before opening the front cover of the inverter to disconnect the wires Both DC and AC wires that are disconnected from the inverter must be properly wrapped with insulated material After the inverter is removed from the mount bracket the through holes of the wires on top of the wiring box must be covered with the cover plate that is attached on top of the wiring box to prevent the box from the water drops causing current leakages Remove the cover of the Inverter 69 Red wire Black wire Communication Cable N wire L wire ng x Fig 5 4 2 1 3 Keep the well wrapped DC and AC wires in store in the wiring box 70 Fig 5 4 2 1 4 Remove the screws and nuts bonding bet
21. de la Belle Etoile F 95956 Roissy CDG Cedex Tel 33 1 49 38 98 60 Fax 33 1 48 63 27 43 french team carlogavazzi fr GERMANY Carlo Gavazzi GmbH Pfnorstr 10 14 D 64293 Darmstadt Tel 49 6151 81000 Fax 49 6151 81 00 40 info gavazzi de GREAT BRITAIN Carlo Gavazzi UK Ltd 7 Springlakes Industrial Estate Deadbrook Lane Hants GU12 4UH GB Aldershot Tel 44 1 252 339600 Fax 44 1 252 326 799 sales carlogavazzi co uk ITALY Carlo Gavazzi SpA Via Milano 13 20020 Lainate Tel 39 02 931 761 Fax 39 02 931 763 01 info gavazziacbu it NETHERLANDS Carlo Gavazzi BV Wijkermeerweg 23 NL 1948 NT Beverwijk Tel 31 251 22 9345 Fax 31 251 22 60 55 info carlogavazzi nl NORWAY Carlo Gavazzi AS Melkeveien 13 N 3919 Porsgrunn Tel 47 35 93 0800 Fax 47 35 93 08 01 gavazzi carlogavazzi no PORTUGAL Carlo Gavazzi Lda Rua dos Jer nimos 38 B P 1400 212 Lisboa Tel 351 21 361 7060 Fax 351 21 362 13 73 carlogavazzi carlogavazzi pt SPAIN Carlo Gavazzi SA Avda Iparraguirre 80 82 E 48940 Leioa Bizkaia Tel 34 94 480 4037 Fax 34 94 480 10 61 gavazzi gavazzi es SWEDEN Carlo Gavazzi AB V a Kyrkogatan 1 5 652 24 Karlstad Tel 46 54 85 1125 Fax 46 54 85 11 77 info carlogavazzi se SWITZERLAND Carlo Gavazzi AG Verkauf Schweiz Vente Suisse Sumpfstrasse 32 CH 632 Steinhausen Tel 41 41 747 4535 Fax 41 41 740 45 40 info carlogavazzi ch OUR SALES NETWORK IN NORTH AME
22. e parts except for the fan and the fuse Only personnel trained and authorized by Carlo Gavazzi are allowed to carry out internal repair and maintenance of the unit Please return the device for overhaul if some fault is caused by parts other than the fan and the fuse described above For the replacement of the fuse please refer to the section 5 3 WARNING Do not make alterations or tamper assembly in the inverter without manufacturer s authorization unless specified elsewhere in this Manual Failing to do so may result in injury electric shock or fire and consequent warranty expiration Wiring the inverter e Input Output Terminals Use wire size 10 AWG to 6 AWG 90 194 F Copper Wire e Reconfirm that all connections and screws have been made correctly and tightened properly WARNING Installation and wiring of the device must be in compliance with the relevant electrical installation local norms issued State or distribution network operator DNO and should follow the important safety instructions in this manual WARNING Use recommended connecting cables for both the AC and DC wirings The cable shall be of the recommended section and with sufficient durability against temperature fluctuation UV radiation and other possible hazards Connection of the AC cable WARNING Reconfirm the circuit breaker connected to the main utility is switched OFF before connecting the power cable from
23. e purpose of Presents safety information is to prevent injuries or death to users and or installers Earth ground symbol Caution refer to enclosed documents The pur pose of present information is to prevent damage to this product General Safety Precautions Skilled and qualified personnel is allowed to mount reconfigure or repair this Inverter Remove all conductive jewelry or personal accessories prior to installation or service of the device parts connectors and or wirings Ensure there is no grounding path through the human body Insulated guards e g insulated mat and or shoes are necessary when working the operating device Use safety guard against risks of electrical shock or personal injury caused by any sudden component failure Follow the instructions manual all information on cautions or warnings must be adhered to Use proper lifting techniques when handling enclosure equipment or parts The ISMGT1 inverter is provided with an equipment grounding conductor and a DC grounding connection The grounded conductor may be ungrounded and energized when ground fault is indicated The list does not contain all measures pertinent to the safe operation of the device If particular problems which are not described in sufficient detail for the purposes of the buyer arise please contact the local CARLO GAVAZZI office specialized dealer or technician Safe Installation and Operation Installation of the device must be in
24. ed to GROUNDED CONDUCTOR terminal and the negative polarity of the DC input voltage from the PV string shall be connected to UNGROUNDED CONDUCTOR terminal as shown in the figure 2 3 2 2 2 UNGROUNDED GROUNDED CONDUCTOR CONDUCTOR A t pa connect to PV connect to PV Fig 2 3 2 2 2 DC terminal blocks for DC cable connection in Positive Ground 35 CAUTION The Positive Polarities of the DC input voltage from PV string shall be correctly connected to the GROUNDED CONDUCTOR terminal and the Negative Polarity of the DC input voltage from PV string shall be connected to the UNGROUNDED CONDUCTOR terminal Make sure the DC voltage that PV arrays generate is equal to or less than 600 VDC in any case The cable of the DC input voltage shall be connected to the terminal labeled GROUNDED CONDUCTOR and the cable of the DC input voltage shall be connected to the terminal labeled UNGROUNDED CONDUCTOR Avoid using wire nuts to join any wires together or to make any improper junction anywhere in the PV system Wire nuts are a frequent cause of unreliable connections resistive connections and ground faults Tighten the screws with a torque of 1 7Nm 15 6 in Ib 36 2 3 3 Connection of the Communication cable The ISMGT1 inverter supports two common data interface standards RS 232 and RS 485 that will be used to communicate to the remote computer or terminal Only
25. eded for grid feeding is in the acceptable range the system will keep monitoring those data for a period of time The following information tell the user that the system will go into the Grid MPP mode in XXX seconds and then show the measured data of the DC input voltages and the actual voltage and frequency on the grid side Mode Monitoring NextConnect XXXs seconds Vpv XXX V seconds 4 3 seconds During the Monitoring mode if DC input voltage falls under the PV start voltage setting the system stays in this mode and shows the information as follows The system will still keep measuring the parameters of both DC and AC and display on the LCD Mode Monitoring Low Insolation seconds Vpv XXX V seconds 4 3 seconds 48 For ISMGT1xxxD DE Germany type for instance which is set according to VDE0126 1 1 if the AC voltage on the grid side increases over the voltage quality monitoring setting and below the over voltage setting for at last 300 seconds in grid MPP mode the ISMGT1 inverter shall return to Monitoring mode and display the messages on the LCD as shown below If the AC voltage decreases and below the voltage quality monitoring setting for at last 300 seconds ISMGT1 inverter will then go back to regular procedure and re connect to the grid if all conditions are satisfied Mode Monitoring Vac High seconds Vpv XXX V seconds seconds Grid MPP Mode
26. en Temp message is presented the power de rating is caused by the over temperature The Ipv message shows that the power de rating is caused by restricting the DC input current to the maximum limit The lac and Pac messages illustrate the power de rating is caused due to restriction of the maximum output AC current and power The VacH message shows that the power de rating is caused by the high AC voltage 50 Warning Message There are three possible warning messages which can be shown when situations occur in grid feeding mode When EEPROM message displayed the system has encountered a failure accessing to the EEPROM The COMM message represents failure of the communication function For the FAN BLOCK message shows that the fan has stopped running These warnings could be happening simultaneously Warning EEPROM Warning COMM Warning FAN BLOCK Fault Mode The fault messages are described as follows First screen shows the mode fault serial number of the inverter the follows software versions of the sequential SEQ and current CUR controllers and then the error messages which are listed in the Error Message Table on section 3 7 SI Mode Fault S N XXXXXXXXX XXX seconds SEQ Version CUR Version seconds seconds There are several error messages which show the detailed conditions causing the system going into the Fault mode Such as the messages shown below which describe th
27. erate AC power Once all conditions necessary for grid connection are satisfied the ISMGT1 inverter goes into the Grid MPP mode and begins feeding the AC power into the grid When the input DC voltage falls below the minimum MPP voltage setting the ISMGT1 inverter will stop feeding AC power into the grid and return to monitoring mode Should the input DC voltage rise again above the PV Start Voltage and all conditions necessary for grid connection are satisfied the ISMGT1 inverter will enter the Grid MPP mode again We appreciated your choice of Carlo Gavazzi ISMGT1 inverters for your power conversion devices in your solar power system This document contains the information you need for the installation and settings of the ISMGT1 inverters Therefore it is strongly recommended to read this manual carefully before the ISMGT1 inverter installation and settings Utility Grid Meter VM MEE Be Photovoltaic Array ISMGT Inverter Fig1 1 1 Grid Connected Solar System Overview 10 1 2 Specifications Specifications for ISMGT128 and ISMGT138 Name Part number ISMGT128 ISMGT138 Grid output AC Grid voltage nominal 230 VAC Grid frequency nominal 50 Hz Maximum output power 2800 W 3800 W Maximum output current 12 2A 16 6 A Output over current protection 20 A 20 A recommended Maximum grid backfeed current OA Waveform True sine Power factor gt 0 99 9 norminal po
28. failure will cause the inverter to go into Idle mode This Mode requires authorised service staff to clear the error s 41 Idle The inverter jumps into this operating mode when it detects a major malfunction and will stop feeding the power to the grid for safety reason This failure cannot be reset by anyone on field Only authorised personnel is equipped to analise the failure and put the system back to operation 42 3 2 Operation Feature Anti Islanding When an island condition is detected the inverter will stop feeding the power to the grid and or the load The island is defined as a grid tied inverter maintaining operation and feeding power to a load that has been isolated from the utility power source This causes an automatic shutdown of the inverter This is a safety feature which is primarily meant to prevent electrical shock to staff who might be working on the grid lines Unity Power Factor The ISMGT1 inverter goal is to feed the power with a unity power factor PF 1 to the utility during operation The inverter continues sensing the phase of the utility voltage and constructs the output current waveform in phase with the utility voltage Maximum Power Point Tracking In order to find the most efficient way of utilizing the solar energy ISMGT1 inverters are designed to track and absorb the maximum power from the PV array The Maximum Power Point Tracking MPPT function is employed in the embedded con
29. figure 5 4 2 2 2 Tighten the screws and nuts with a torque of 1 7Nm 15 6 in Ib when performing the following items 6 7 and 8 Fasten the original 2 screws by a cross driver and the 2 nuts by a 7 mm wrench as shown in the figure 5 4 2 2 3 If it is originally negative ground then connect the red DC wire to the terminal labeled DCIN and connect the black DC wire to the terminal labeled DCIN as shown in the figure 2 3 2 1 1 If it is a positive ground system then connect the red DC wire to the DCIN terminal and connect the black DC wire to the DCIN terminal as shown in the figure 2 3 2 2 1 Please refer to the section 2 3 2 for further details For the AC wire connections the brown Vac wire shall be connected to the terminal labeled ACIN L1 the blue Vac wire must be connected to the ACIN L2 terminal as shown in the figure 5 4 2 2 4 To connect the communication cable 10 Put the covers of the inverter and wiring box back and fasten the screws as shown in the figure 5 4 2 2 5 11 Turn ON the DC AC disconnect switch and breakers 76 gt e B WARNING PV arrays are always energized when exposed to light therefore hazardous voltage is still present on the terminal blocks and the PV string fuse holders even the DC AC disconnect switch is switched OFF Please cover the PV arrays with opaque dark materials during the inverter removal and absence until the inverter is hooked back and reconnected WARNING Hazardous volt
30. he DC AC disconnect switch and circuit breakers stay at the OFF position until the inverter is re installed all wires are connected correctly front covers are put back and screws are fastened 73 5 4 2 2 Re install the Inverter After re installation of the inverter all wires must be re connected correctly before put the inverter back to work properly cover plate Y m cover plate cover plate Fig 5 4 2 2 1 Re install the cover plate and fix it on the top of the wiring box nn Lee Fig 5 4 2 2 2 Hang the inverter onto the mounting bracket carefully 74 Fig 5 4 2 2 3 Fasten the screws and nuts bonding between the inverter and the wiring box for its construction and grounding Blue wire connected to ACIN L2 Brown wire connected to ACIN L1 alt T gt Communication Cable Fig 5 4 2 2 4 Connect the AC wirings to their correct terminals individually 75 PH S 9 t 4 1 1 55 g ge Fig 5 4 2 2 5 Fasten the screws of cover of the inverter first and the wiring box then Turn off all DC AC disconnect switch and breakers Remove the front cover of the wiring box by following the steps described in section 2 3 Remove the cover plate used to cover the through holes of the wires and put it back to its original place as shown in the figure 5 4 2 2 1 Remove the cover of the inverter and then hung it on the mounting bracket as shown in the
31. he heatsink Once the temperature exceeds 78 C 172 4 F the system will reduce the output power until the temperature drops under the critical value The ISMGT1 inverter will shut down the power output to the grid if the temperature reaches 82 C 179 6 F If this occasion happens often it 15 necessary to check whether the inverter is mounted at appropriate place with good ventilation and not directly exposure to the sunshine Input DC current When the input current from the PV strings is about to exceed the maximum limit the ISMGT1 inverter will restrict it to the operating limit in order to prevent damage to the inverter If this occasion happens frequently it is necessary to check whether the PV array is configured properly to supply the DC current within the maximum limit of the inverter Output AC power The maximum power that the ISMGT1 inverter feeds to the grid is limited according to the specifications listed in Section 1 2 Even if the output current does not up to the maximum current limit the output power may still be limited in order to keep the output power within the maximum power limit It often occurs in case the output voltage is higher then nominal AC voltage Output AC current The maximum current that the ISMGT1 inverter feeds to the grid is limited according to the specifications listed in Section 1 2 Even if the output power does not up to the maximum power limit the output current may still be limited in o
32. he screw After the inverter is held correctly on the bracket and secured with the screw it is then possible to proceed to wiring 23 2 3 Wiring the inverter The ISMGT1 inverter is provided with four 4 three 3 for ISMGT128 independent PV strings to be connected in parallel in the wiring box The wiring box of the has screw terminals and cable glands for the DC the wire section shall be in the range of 10 AWG and 6 AWG Fig 2 3 1 Wiring box type It order to wire the inverter it is necessary to remove the front cover There is a DC AC disconnect switch built on the wiring box then the DC AC disconnect switch shall be turned to the OFF position first of all as shown in figure 2 3 2 Then remove the screws two on each side of the cover remove the cover of the wiring box as shown in the figure 2 3 3 below 24 Fig 2 3 2 Turn the DC AC disconnect switch OFF Fig 2 3 3 Remove the cover of the wiring box In order to prevent water dust or any other unwanted foreign body entering the enclosure All the unused cable glands must be filled with sealing pins enclosed in the accessories when the wiring work is almost completed See figure 2 3 4 25 Seding Fin Fig 2 3 4 Sealing pins plugs The three following sections describe the wiring for the AC ouputs DC inputs and communication ports There is one 1 AC terminal block a pair of DC terminal blocks and two 2 RJ
33. inverter will shut down itself There are five main operating modes as described in detail below System Check When the DC input voltage goes above the PV start voltage the Monitoring Grid MPP Fault inverter is powered up initialises and then enters the System Check mode In this operating mode the inverter runs the diagnostic routine This stage lasts a few seconds After System Checking is complete the inverter enters the Monitoring mode In this operating mode the inverter monitors all parameters on both AC and DC sides in order to ensure that connecting to the Grid is safe All conditions must be fulfilled and last for the specified period of time then the system will enter the Grid MPP mode After the Monitoring mode the ISMGT1 inverter confirms that all conditions necessary for feeding the power into the utility grid are fulfilled The inverter will turn on the AC relays and start feeding the AC power to the grid In this operating mode the inverter continues to convert the DC power generated by the PV array to the AC power that is then fed into the grid When fault s occurs and have been detected in the operating mode described above the inverter will terminate the present state stop feeding power to the grid and then jump into the Fault mode and execute the programmed sequence In case the faults clear for the preset time the inverter will leave Fault mode and enter System Check mode Some faults like component
34. ipping dimensions HxWxD 840x548x305 mm 33 1x21 6x12 inches Junction box AC connection Screw terminal DC connection 4 strings input Standard ISMGT140D ISMGT150D DC AC disconnect switch Yes DC connect Screw terminal Positive ground inverter ISMGT140DP ISMGT150DP DC AC disconnect switch Yes DC connect Screw terminal Interface Communication RS 232 and RS 485 Display LED LCD Certifications EN50178 IEC62103 VDE0126 1 1 RD1663 RD661 DK5940 G 83 14 1 3 Adjustable Parameter Settings This new series of ISMGT1 inverters have currently four different interface protections in order to fulfill the market needs most of European countries They can be distinguished by the model names described as follows Some models have the same interface protection but differ in the display and documentation language Eg DE and FR interface is VDEO126 for both but DE has German documentation and Display language whilst FR is French ISMGT1xxD DE ISMGT1xxD ES ISMGT1xxD EN ISMGT1xxD FR e ISMGT1xxD IT ISMGT1xxD UK Interface Parameter Settings For Germany For Spain European version For France For Italy For United Kingdom RD1663 G 83 recommendation 0 0126 1 1 DK5940 RD661 ISMGT1xxD DE Model 5 ISMGT1xxD FR ISMGT1xxD IT ISMGT1
35. nt the inverter on a wall that is strong enough to sustain the inverter 32 kg 70 5 Ib weight 4 Avoid mounting the inverter on a location directly exposed to sunlight to maintain the ambient temperature of the inverter within 25 C and 65 C 13 F and 149 F Humidity shall be within 096 and 9596 5 Keep DC wiring as short as possible to minimize power loss 6 The mounting bracket should be fastened on a concrete or a masonry wall with the provided accessory WARNING Do not expose the inverter to the corrosive liquids and or gases Not to operate the inverter in flammable or explosive environment or close to flammable materials failing to so may result in fire and or explosion Some parts of the cooling surface can reach temperatures over 70 C 158 F WARNING 17 ceiling i 50 19 69 50 19 69 20 7 87 200 8 90 35 43 wall 100 39 37 100 39 37 unit cm inch Fig 2 1 1 Clearances required for ISMGT1 inverter installation 18 2 2 Mounting The steps listed below describe how to mount the inverter on the wall 1 After removing the inverter from the carton the attached mounting bracket must be removed by sliding the bracket down and away from the inverter as shown in the figure 2 2 1 below Mounting slots for securing the inverter Mounting flanges Fig 2 2 1 Removal of the mounting bracket from the inverter
36. o an external computer if RS 232 interface is used Please refer to the section 2 3 Connection of the Communication Cable for the detail pin descriptions for both RS 232 and RS 485 interfaces 3 7 Explanations of Error Messages In the event of a fault the inverter will stop feeding the AC power to the utility grid and display the error message on the LCD Qualified service personnel shall do the analysis measurement and debug if needed according to the error message in order to resume normal conditions It is recommended to screen out the fault condition s by referring to the table below and then remove the fault condition s to return normal condition and continue to feed AC power to the utility Please contact Carlo Gavazzi Office or your service representative if the same error message is persistent 55 Error Message Table Error Message Description GridNA Drift Fac VacH VacL FacH No AC voltage is detected on the grid side Islanding is detected The AC voltage of utility grid is over the upper limit The AC voltage of utility grid is under the lower limit The frequency of AC voltage of the utility is over the upper limit Error Message Description FacL VpvH Imax AC InvTempMax Relay 1 Open Relay 1 Close Relay 2 Open Relay 2 Close MOV Fault AC MOV Fault DC GFDI The frequency of AC voltage of the utility is under the lower limit The DC v
37. oltage of PV array is over the upper limit Over current on the AC side The internal temperature of the inverter exceeded the safe operating limit Relay 1 test open failed Relay 1 test close failed Relay 2 test open failed Relay 2 test close failed High voltage protection function failed in AC side High voltage protection function failed in DC side A grounding fault is detected The ground fault fuse will be blown 56 DCInjectCurH VdcbusH Internal COMM Watchdog Idc Test Offset Over DC current injected into the AC grid is detected Internal DC bus voltage is over the upper limit Internal communication failed Internal watchdog function triggered The DC injection current monitoring function failed Offset check for grid monitoring failed Error Message Description Temp Sensor RAM Test EEPROM Test System Error Version Error CPU Delta Fac CPU Delta Vac CPU Delta GFDI CPU Delta Idc IpvH The internal temperature sensor failed Memory failed EEPROM test failed The system failed The firmware version is not correct Internal measurement comparison error or defective hardware Over current on the DC side 57 Driver Fault CalDataError CalDataLoss Ibuck Over Converter Error Autotest Driver circuit or power device failed Calibration data is out of range Calibration data is lost Intern
38. one of the communication interfaces can work at a time As shown in the figure 2 3 3 1 there are two RJ 45 connectors RJ45 L and RJ45 R located on the bottom of the wiring box The pin numbers of the RJ 45L and RJ 45R connectors and the corresponding signals are described in the figure 2 3 3 2 below ON RJ45 R RJ45 L OFF RS232 Termination ON OFF Fig 2 3 3 1 Positions of the communication ports and termination switch RJ45 L RJ45 R Pin Pin 1 TXD RS 232 1 Factory reserved 2 RXD RS 232 2 Factory reserved 3 Not used 3 SV 4 GND 4 GND 5 GND 5 GND 6 Not used 6 SV 7 Data RS 485 7 Data RS 485 8 Data RS 485 8 Data RS 485 Fig 2 3 3 2 RJ 45 Pins and Signals 37 The RS 232 signal pins TXD and RXD are only on the RJ45 L Therefore only the RJ45 L can be used to connect to one remote PC or terminal when the RS 232 interface is used The cable with the part number of WABG 09188 which is 180 cm 70 9 inches in length is dedicated for the communications between ISMGT1 inverter and a computer The cable pinout diagram between RJ45 and RS 232 is shown in the figure 2 3 3 3 If the RS 485 interface is used as the external communication interface both RJ 45 connectors will be used for the cascaded RS 485 connection Daisy Chain as shown in the figure 2 3 3 4 If the inverter is the last device within the RS 485 chain then the termination switch shall be put to ON position as shown in the figure
39. rder to keep the output current within the maximum current limit It often occurs in case the output voltage is lower then nominal AC voltage Output AC voltage When the inverter is connected to a grid system with longer or thinner wirings its output voltage might be higher than the over voltage setting This will cause disconnection due to the voltage deviation instead of abnormal voltage happened in the grid ISMGT1 inverter provides a setting of voltage quality monitoring which is less than the setting of over voltage Once the AC voltage reach the voltage quality monitoring setting ISMGT1 inverter will restrict the output current to keep the AC voltage stay 64 equal to or less than the setting of AC over voltage so that the inverter instead of shut itself down keeps output power to the grid although it is not the maximum output power 3000 a EEE iene EEE 500VDC 2500 i i 2 315VDC i i i i 250VDC 2000 prananannana E messen Ne rre besnnnnnnungesnusseneen EIIE i E1500 Pi GE M o RI Er Pt RE rc nen 0 E H 45 50 55 60 65 70 75 80 85 Ambient Temp C Fig 5 3 1 Temperature derating curve of the ISMGT128 e 500VDC m 375VDC 1 250VDC 45 50 55 60 65 70 75 80 85 Ambient Temp C Fig 5 3 2 Temperature derating curve of the ISMGT138 4500 EEE 4000
40. ree procedures are illustrated in the figure 3 4 1 46 The following figures explain how the display works for the regular procedure Initialisation Mode When the DC input voltage rises above the pre set threshold value the ISMGT1 inverter is powered up and will show the company name and model name ISMGT150 in this example on the LCD as shown below CARLO GAVAZZI ISMGT150 3 seconds 4 After 3 seconds software versions of two embedded CPU s Sequential SEQ and Current CUR controller will be displayed on the LCD Afterward the serial number S N the baudrate BR address ID for the communication port will be displayed SEQ Version X XX CUR Version X XX seconds S N XXXXXXXXXXXX BR XXXXX ID XXX seconds System Check Mode After the basic information of the inverter is displayed the system enters the System Check mode which is then indicated on the LCD Mode System Checking During the System Check if the DC input voltage is not reaching the point of the PV start voltage setting then the following message will be shown on the LCD and the system will stay at this step Low Insolation During the System Check if the grid is not connected to the inverter then the inverter enters to Fault mode and following message will be shown on the LCD 47 Mode GridNA Monitoring Mode Once the System Check is done the inverter goes into the Monitoring mode If all data ne
41. ssued by local distribution network operator DNO each connection to an ISMGT1 inverter must be installed with dedicated double pole circuit breaker in the main utility service panel The breaker must be sized to carry the rated maximum output voltage and current of the ISMGT1 Inverter Refer to Section 1 2 Specifications Output over current protection pages 3 6 No other appliances shall be connected to the circuit breaker 30 2 3 2 Connection of the DC cable The wiring box of the ISMGT1 inverter is designed to have pairs of DC terminal blocks which support up to four 4 three 3 for ISMGT128 PV strings to be connected in parallel inside the wiring box CAUTION ISMGT1 inverters are listed for no backfeed current However all other external source circuits and array wiring Current capacity should be taken into account by system installers when determining the proper rating of PV string fuse or a fire hazard may occur if there is short circuit in a PV string There are two 2 terminals labeled UNGROUNDED CONDUCTOR and GROUNDED CONDUCTOR per PV string located in the wiring box used for the DC cable connections All the screws shall be tightened with a torque of 1 7Nm 15 6 in Ib Up to four 4 three 3 for ISMGT128 PV strings 4 pairs can be connected to the ISMGT1 inverter as shown in the figure 2 3 2 1 The PV strings will be connected in parallel inside the wiring box EFIE HENK EFI mp
42. the breaker to the AC connector Connection of the DC cable AN CAUTION Identify the different polarity of DC voltage on each PV string and connect respectively to the input terminals marked UNGROUNDED CONDUCTOR and GROUNDED CONDUCTOR Make sure the DC voltage that PV arrays generate is equal to or less than 600 VDC in any condition WARNING Route the DC connection cables to the ISMGT1 inverters away from any possible hazard that may damage the cables WARNING Hazardous voltage is still present on the device after disconnection of all PV DC inputs Allow five 5 minutes for the inverter to discharge the energy stored in capacitors WARNING PV arrays will be energized when exposed to light Cover the arrays with opaque dark materials during installation and wiring Contents 1 INTRODUCTION 1 1 1 2 1 3 1 4 2 INSTALLATION poer 17 21 VPEAGEMENT viske 17 2 25 MOUNTING 19 2 3 WIRINGTHEINVERTER emnes 24 2 3 1 Connection of the AC cable 29 2 3 2 Connection of the DC cable auna 31 2 3 2 1 Connection of the DC wires for Negative Ground Arrays 33 2 3 2 2 Connection of the DC wires for Positive Ground Arrays 35 2 3 8 Connection of the Communication cable 2 4 WIRING INVERTER IN 3 OPERATION ue
43. the inverter 19 Fig 2 2 2 Inverter mounting bracket i 20 Fig 2 2 3 Fasten the mounting bracket i 21 Fig 2 2 4 Hook the Inverter on the mounting bracket and then fasten the screw23 Fig 2 3 1 Wirihg DOXXtVDe nar an br re RS LANet Fig 2 3 2 Turn the DC AC disconnect switch OFF Fig 2 3 3 Remove the cover of the wiring bOX i Fig 2 3 4 Sealing pins Fig 2 3 5 Wiring box front vieW i Fig 2 3 1 1 AC Terminal Block for AC cable connections Fig 2 3 2 1 PV terminal connection Fig 2 3 2 1 1 Negative Ground Setting and DC wires connections 33 Fig 2 3 2 1 2 DC terminal blocks for DC cable connection in Negative Ground33 Fig 2 3 2 2 1 Positive Ground Setting and DC wire connections 35 Fig 2 3 2 2 2 DC terminal blocks for DC cable connection in Positive Ground35 Fig 2 3 3 1 Positions of the communication ports and termination switch 37 Fig 2 3 3 3 RS 232 connection Fig 2 3 3 4 RS 485 connection Fig 2 4 1 Parallel configuration of inverter ii 40 Fig 3 3 1 Front panel of the ISMGT1 inverter 44 Fig 3 4 1 ISMGT1 inverter LCD display lay OUt i 54 Fig 5 1 2 Outline Drawing of ISMGT128DS ii 60 Fig 5 1 5 Outline Drawing of ISMGT138DS 61
44. ting and DC wires connections UNGROUNDED GROUNDED CONDUCTOR CONDUCTOR Im E U GENI ER connect to PV connect to PV Fig 2 3 2 1 2 DC terminal blocks for DC cable connection in Negative Ground 33 CAUTION VAN Identify the different polarity of DC voltage on each PV string and connect respectively to the input terminals marked UNGROUNDED CONDUCTOR and GROUNDED CONDUCTOR Make sure the DC voltage that PV arrays generate is equal to or less than 600 VDC in any case e The cable of the DC input voltage shall be connected to the terminal labeled UNGROUNDED CONDUCTOR and the cable of the DC input voltage shall be connected to the terminal labeled GROUNDED CONDUCTOR e Avoid using wire nuts to join any wire together or to make any improper junction anywhere in the PV system Wire nuts are frequent cause of unreliable connections resistive connections and ground faults e Tighten the screws with a torque of 1 7Nm 15 6 in Ib 34 2 3 2 2 Connection of the DC wires for Positive Ground Arrays The ISMGT1 inverter also support PV arrays with positive ground for some applications As shown in the figure 2 3 2 2 1 the JP14 and JP15 jumpers are placed on the higher positions to set to the positive ground And the red DC wire is connected to DCIN terminal and the black DC wire is connected to DCIN terminal In this case the positive polarity of the DC input voltage from the PV string shall be connect
45. trol software to achieve this intended purpose 43 3 3 LED Indication There are three LED s on the front panel of the ISMGT1 inverter which displays the operating status of the inverter As shown in the figure 3 3 1 The detailed explanations of the status and the corresponding LED indications are described in the following table Fig 3 3 1 Front panel of the ISMGT1 inverter 44 LED Indication Table LED indicators Operating status On Grid Description Green Yellow Red Initialization The ISMGT1 inverter is in initial mode Green Yellow Red System Check mode The inverter is in System Check mode Green Yellow Red Monitoring mode The inverter is in Monitoring mode Green Yellow Red Grid MPP mode The inverter is in Grid MPP mode Green Yellow Red Power De rating Output power is de rated Green Yellow Red Warning Warning detection Green Yellow Red 1 Low Insolation 2 Vac high 1 Insufficient Sun irradiation 2 Vac is higher than the voltage quality monitoring setting Green Yellow Red Fault mode The inverter is in Fault mode Green Yellow Red Ground Fault Ground fault detected Green Yellow Red Idle mode The inverter is in Idle mode Green Yellow Red eee gt e x e xtie e cole e ce e Night Time N There is no DC power coming from PV array S
46. ween the inverter and wiring box Fig 5 4 2 1 5 Un hang the inverter carefully cover plate 71 cover plate cover plate Fig 5 4 2 1 6 Locate the cover plate in place and fasten the screws Turn the DC AC disconnect switch to OFF position and turn off all breakers Wait for at least 5 minutes Remove the cover of the wiring box by following the steps described in section 2 3 Remove the cover of the inverter as shown in the figure 5 4 2 1 1 Disconnect the red and black DC wires from the DCIN and DCIN terminals disconnect the brown and blue wires from the ACIN 11 and ACIN 12 terminal and disconnect the communication cable as shown in the figure 5 4 2 1 2 All disconnected wires must be wrapped with insulated materials to prevent from the electric shock Pull in those disconnected wires inside the wiring box as shown in the figure 5 4 2 1 3 Loose the 2 screws by a cross driver and the other 2 nuts by a 7 mm wrench so that the inverter can be taken apart from the wiring box as shown in the figure 5 4 2 1 4 Remove the inverter from the mounting bracket as shown in the figure 5 4 2 1 5 72 9 Using the cover plate that is on top of the wiring box to cover the through holes of the wires as show in the figure 5 4 2 1 6 10 Put the front cover of the wiring box back and fasten the screws 11 Collect the removed screws and nuts in a plastic bag for the need of re install the inverter in the future 12 Keep t
47. wer Total Harmonic Distortion 396 DC Component 0 5 96 Phase Single o olar input DC MPP voltage range 200 550 VDC Maximum input voltage 600 VDC PV start voltage 235 VDC adjustable Maximum input current 15A 20A Maximum input short circuit current 24A Efficiency Maximum efficiency 96 4 96 96 4 96 European efficiency 95 4 96 95 7 96 Night time tare loss 0 5 W Environmental Operating temperature range 25 65 C 13 149 F Maximum full power operating ambient 58 C 136 4 F 55 C 131 F Relative humidity Max 95 11 Mechanical Outdoor enclosure 144 Cooling Natural Cooling fan Input and output terminals Accept wire size of 4 to 16 mm 10 to 6 AWG Weight Shipping weight 23 kg 27 kg 50 7 Ib 59 5 Ib Dimensions HxWxD 768x454x175 mm 30 3x17 9x6 9 inches Shipping dimensions HxWxD 840x540x275 mm 33 1x21 3x10 8 inches Junction box AC connection Screw terminal DC connection 3 strings input 4 strings input Standard ISMGT128D ISMGT138D DC AC disconnect switch Yes DC connect Screw terminal Positive ground inverter ISMGT128DP ISMGT138DP DC AC disconnect switch Yes DC connect Screw terminal Interface Communication RS 232 and RS 485 Display
48. wiring box74 Fig 5 4 2 2 2 Hang the inverter onto the mounting bracket carefully 74 Fig 5 4 2 2 3 Fasten the screws and nuts bonding between the inverter and the wiring box for its construction and grounding continuit 75 Fig 5 4 2 2 4 Connect the AC wirings to their correct terminals individually 75 Fig 5 4 2 2 5 Fasten the screws of cover of the inverter first and the wiring box Jg 76 1 Introduction 1 1 General The Carlo Gavazzi Industries ISMGT1 product family is series of grid connected photovoltaic inverters which are designed to convert DC power generated by photovoltaic arrays into AC power that is fed into the utility grid The ISMGT128 ISMGT138 ISMGT140 and ISMGT150 are part of the family for the European market The overview of the grid tied solar energy system is shown in figure 1 1 1 ISMGT1 inverters utilize state of the art technology reliability and ease of use and comply with the requirements of 126 1 1 DK5940 RD1663 RD661 G 83 and 50178 regulation The ISMGT1 inverter is designed to operate automatically once it is installed and commissioned correctly When the DC input voltage generated by the photovoltaic array rises above the pre set threshold value the embedded controller starts and goes through System Check mode and then into Monitoring mode until the PV Start Voltage is reached During this time the ISMGT1 inverter will not gen
49. xxD ES ISMGT1xxD UK ISMGT1xxD EN Over voltage VAC 260 0 262 0 253 0 264 0 Under voltage VAC 190 0 188 0 196 0 207 0 Over frequency Hz 50 19 50 3 51 0 50 5 Under frequency Hz 47 51 49 7 48 0 47 0 Over voltage clearing time cycle 8 4 8 74 Under voltage clearing time cycle 8 9 8 74 Over frequency clearing time cycle 5 3 5 24 Under frequency clearing time cycle 5 3 5 24 Voltage quality monitoring VAC 253 0 257 6 250 7 260 0 Voltage quality monitoring time s 300 NA 0 NA NA Reconnect delay s 20 20 180 180 PV start voltage VDC 235 0 235 0 235 0 235 0 The period of time for the ISMGT1 inverter to disconnect from the grid and enter the Monitoring mode after the detection of the AC voltage that is higher than the Voltage quality monitoring setting and below the Over voltage setting This function is available only in the models of Germany type according to the VDE 0126 1 1 Clause 4 2 3 15 1 4 Accessories Operation Manual 1 pc e Auto Test software ISMGT1xxxx IT only 1pc 16 2 Installation 2 1 Placement 1 ISMGT1 inverters must be mounted vertically may be located indoor or outdoor according to protection class IP44 2 Leave at least 50 cm 19 67 inches of free space above and 100 cm 39 37 inches below the inverter when installed outdoor Allow 20 cm 7 87 inches between inverters when installing multiple inverters for better ventilation see figure 2 1 1 3 Mou
50. ystem is powered off O LED ON 6 LED OFF X DON T CARE TX LED ON OFF 0 1 0 9 Sec XX LED ON OFF 0 9 0 1 Sec IX LED ON OFF 0 25 0 25 Sec 45 3 4 LCD Display The ISMGT1 inverter has a 2 x 16 characters LCD to show the operating status input output data and error messages As long as the DC input voltage is above the pre set threshold value the LCD will display the information following the process flow illustrated in the figure 3 4 1 There are 3 main process flows in the device program Regular procedure fault procedure or idle procedure In the regular procedure the system goes from Initialisation to System Check Monitoring and then Grid MPP mode providing no fault condition is detected The inverter is expected to always work in the regular procedure and feed the power to the grid If a fault condition that can be self recovered is detected during the System Check or Monitoring mode the system will go into the fault procedure The system will return to regular procedure once the fault condition is cleared An obvious example of the automatic restore is the detection of an island condition due to the grid failure later the grid may be restored and the fault condition is automatically cleared when the power recovers If a fault which cannot be self cleared is detected the system will enter the idle procedure The only tools to exit this procedure are available to authorised personnel These th

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