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Installation Manual - SUNNY STRING-MONITOR SSM8-21

1. Requirement LI The String Monitor Unit is supplied with voltage Procedure 1 Open the fuse holders 2 TANTE Danger to life due to electric shock if live components of the Sunnv String Monitor are touched Only insert the string fuses in the Sunny String Monitor when the power is switched off 3 Close the fuse holders A Switch on the DC load break switch 40 SSMxx 2 l IA BS JP en 20 Installation Manual SMA Solar Technologv AG 8 Disconnecting the Sunnv String Monitor 8 Disconnecting the Sunnv String Monitor A DANGER Danger to life due to electric shock if live components of the Sunny String Monitor are touched Observe the following safety rules when disconnecting Disconnect the device from voltage sources Ensure that the device cannot be reconnected Ensure that no voltage or current is present Ground and short circuit the device Cover or isolate any adjacent live components Risk of burns from touching hot components Wear personal safety equipment when working on the device Danger to life from electric shock if the DC load break switch is damaged Switching the DC load break switch at temperatures below 25 C may cause damage to the DC load break switch Correct disconnection function can no longer be guaranteed High voltages are present in components that are not properly disconnected Touching live components can result in death or serious injury due to electric shock Do not switch
2. 2 1 BS SSM8 2 l BS JP Maximum DC output current for SSM 16 2 1 BS SSM16 21 BSJP Maximum reverse current Fuse characteristics Nominal current strength of string fuses Dimensions of string fuses Maximum current per fuse at maximum current of 25 Apc per measuring channel maximum output current of 200 Apc 280 Apc and ambient temperature of 40 C Maximum current per fuse at maximum current of 25 Apc per measuring channel maximum output current of 200 Apc 280 Apc and ambient temperature of 50 C Maximum current per measuring input Number of string inputs per potential SSM8 2 1 BS SSM8 21 BSJP Number of string inputs per potential SSM16 21 BS SSM16 21 BS JP Number of string fuses per potential SSM8 2 1 BS SSM8 21 BSJP Number of string fuses per potential SSM16 21 BS SSM16 21 BS JP Number of measuring inputs per potential SSM8 21 BS SSM8 21 BSJP Number of measuring inputs per potential SSM 1 6 2 1 BS SSM16 21 BS JP External DC supply voltage DC load break switch Surge arrester for DC input Surge arrester for RS485 communication SSM8 2 1 BS JP SSM16 21 BS JP Overvoltage category via the data cable for RS 485 communication DC Main Connection to Busbar Connection to busbar Maximum conductor cross section Cable gland 52 SSMxx 2 1 IA BS JP en 20 SMA Solar Technology AG Negatively grounded positively grounded isolated 1 000 Vpc 200 Apc 280 Apc 15 kApc gPV Apc 30 Apc 10 x 38 m
3. String Monitor Unit A saca TITRE MIS Bnrm ii p WE N WE MS Q nmm IR EHE HEN ERE ERE ERE HE EEA HIT AGE Es Es Es Es e Es Figure 21 LED Error on the String Monitor Unit Position Designation A LED Error Procedure 1 A DANGER Danger to life by electric shock or electric arc if live components are touched e Disconnect the Sunny String Monitor from voltage sources see Section 8 page 41 2 If the red Error LED on the String Monitor Unit is glowing contact the SMA Service Line Installation Manual SSMxx 2 1 IA BS JP en 20 49 11 Decommissioning SMA Solar Technologv AG 11 Decommissioning 11 1 Disassembling the Sunnv String Monitor Requirement LI The Sunny String Monitor is disconnected from voltage sources see Section 8 Disconnecting the Sunnv String Monitor page 41 Procedure 1 Disconnect the string cables from the fuse holders N Oo QO BR C ND Open the doors of the Sunny String Monitor Disconnect the DC main cable Disconnect the grounding cable Release the cable glands Pull all cables out of cable glands and cable feed through plates Disassemble the Sunnv String Monitor 11 2 Disposing of the Sunny String Monitor 50 Dispose of the Sunnv String Monitor in accordance with the applicable disposal regulations for electronic waste SSMxx 2 1 IA BS JP en 20 Insta
4. U A AN UN i fh ecc 6 E O ae 7 gt Z V Z 7 A s L g B i Figure 20 Position of the labels in and on the Sunny String Monitor with the SSM 2 1 BS as an example Position A UI O 46 86 101700 02 86 051488 86 0514 86 101700 02 SSMxx 2 1 IA BS JP en 20 SMA order number Designation Risk of electric shock Do not actuate the load break switch at temperatures below 25 C Warning regarding dangerous voltage Negative terminal L Two labels Risk of electric shock from active power source and Damage to the system due to incorrectly rated fuses Maximum output current 200 A or Risk of electric shock from active power source and Damage to the system due to incorrectly rated fuses Maximum output current 280A Installation Manual SMA Solar Technologv AG 10 Maintenance Position SMA order number Designation E 86 0512 Positive terminal L F 86 101700 02 Three labels Risk of electric shock from active power source Risk of electric arc Risk of burns due to hot components Material number of the label sheet with all warning labels for all product versions Procedure 1 ay WP WwIed3 Dange
5. e alnlalalala i bb dd SILLA o lin Fica e Figure 18 Main components of the Sunny String Monitor with SSM 16 2 1 BS JP as an example A3 SSMxx 2 1 IA BS JP en 20 Installation Manual 10 Maintenance SMA Solar Technology AG r o d 0 c n o E e mn JE iei SEE 8 is B Di p E io o o E PE B Di B Bol io BH NE E IE IM IE Sl Hir iN o o N cl o o g Eo Cl o o lo Hi Cl o o g No CN o o g Eo E jo BB Uus NI e S VE EN ERN A B A F F 0 e e G H I K L M L N H G Figure 19 Main component
6. good working order Installation Manual SSMxx 2 1 1A BS JP en 20 7 2 Safetv SMA Solar Technologv AG Danger to life from electric shock if the Sunnv String Monitor is left unlocked If the Sunnv String Monitor is unlocked unauthorized persons will have access to components carrving lethal voltages Touching live components can result in death or serious injury due to electric shock e Always lock the Sunny String Monitor Remove the keys from the door locks Keep the keys in a safe place Risk of fire due to failure to observe torque specifications on live bolted connections Failure to follow the specified torques reduces the ampacity of live bolted connections so that the contact resistances increase This can cause components to overheat and catch fire Ensure that live bolted connections are always tightened with the exact torque specified in this document Use suitable tools when working on the device Avoid repeated tightening of live bolted connections as this may result in inadmissibly high torques Danger to life from electric shock if the DC load break switch is damaged Switching the DC load break switch at temperatures below 25 C may cause damage to the DC load break switch Correct disconnection function can no longer be guaranteed High voltages are present in components that are not properly disconnected Touching live components can result in death or serious injury due to electric shock Do not switch t
7. of a grounding electrode 30 SSMxx 2 1 IA BS JP en 20 Installation Manual SMA Solar Technologv AG 6 Electrical Connection 6 6 2 Connecting the Grounding Cable in the SSMxx21 BS JP In the device type SSMxx 2 1 BS JP an additional surge arrester is installed for the RS485 communication To guarantee the functionality of the surge arresters they must be connected to the external grounding Cable requirement O Conductor cross section 16 mm to 35 mm Requirement LI The grounding cable must be routed into the Sunny String Monitor through the cable gland see Section 6 2 page 23 Procedure 1 Strip off the grounding cable insulation by 16 mm 2 Connect the grounding cable to the screw terminal X100 torque 3 2 Nm 3 Ensure that the grounding cable is securely in place 4 Tighten the grounding cable gland 5 Ground the grounding cable in the vicinity of the Sunny String Monitor e g by means of a grounding electrode 6 7 Connecting the Data Cables 6 7 1 Cable Requirements Requirement LI The voltage supply and the communication connection must be combined in one cable For an optimum voltage supply SMA Solar Technology AG recommends connecting two insulated conductors with a cross section of 0 5 mm each to one voltage supply terminal You can connect two insulated conductors to one terminal for the GND_EXT signal in just the same way Recommended cable type Li2YCYv TP 4 x 2 x 0 5 mm 6 7 2 Connecting the Data
8. set screw with an Allen key Insert the DC main cables into the terminal from below Ensure correct polarity Fasten the set screw torque 32 Nm 3 Ensure that the DC main cables are securely in place Installation Manual SSMxx 2 1 1A BS JP en 20 29 6 Electrical Connection SMA Solar Technologv AG Connecting Aluminum Cables to the Terminals Upon contact with oxvgen an oxide film forms on aluminum surfaces This oxide film increases transition resistances For this reason the insulated conductors of the aluminum cables must be cleaned immediatelv before connecting them If thev are not to be connected immediatelv after cleaning the cable ends need to be greased SMA Solar Technologv AG recommends connecting the greased insulated conductors to the terminals within eight hours Risk of fire if dirtv or oxidized aluminum cables are connected Connecting dirtv or oxidized DC main cables reduces the ampacitv of the live terminals therebv increasing the transition resistances This can cause components to overheat and catch fire e Only connect clean and oxide free conductors of the aluminum cable Ensure that the conductors are free of iron particles e Connect the insulated conductors to the terminals within ten minutes after cleaning Procedure 1 Strip off the DC main cable insulations by 35 mm 2 Remove any oxide film from the insulated conductors e g with a sharp knife Do not use a file sandpaper or brush 3
9. the DC load break switch at temperatures below 25 C Danger to life from electric shock due to damaged fuse holders Using the fuse holders at temperatures below 25 C may cause damage to the fuse holders Correct disconnection function can no longer be guaranteed High voltages are present in components that are not properly disconnected Touching live components can result in death or serious injury due to electric shock Do not use the fuse holders at temperatures below 25 C Procedure 1 Switch off the DC load break switch This ensures that there is no current flow through the Sunny String Monitor 2 Disconnect the Sunny Central from voltage sources see Sunny Central installation manual If there are fuses in the Sunny Central remove them Use the LV HRC fuse handle or If there are no fuses in the Sunny Central remove the fuses in the DC main distributor 3 Only open the fuse holders in the Sunny String Monitor when the power is switched off Installation Manual SSMxx 2 1 1A BS JP en 20 41 9 Troubleshooting SMA Solar Technology AG 9 Troubleshooting Symptom LED DINI is off The LED Error is glowing The LED RS485 has been off for more than five minutes Cause and corrective measures The surge arrester for the DC main cable has tripped Corrective measures e If the Sunny String Monitor is equipped with a modular surge arrester replace the defective module in the surge arrester Ensure tha
10. the inverter or main DC distribution box and disconnected from voltage sources There is no reverse voltage from the inverter All connections must be made in accordance with this manual see Section 6 Electrical Connection page 23 The correct polaritv of all connections must be ensured and documented U LI LI The floor around the Sunnv String Monitors must be firm and freelv accessible 7 2 2 Terminating the Data Cable The last Sunnv String Monitor of each string and the Ethernet hubs in the Sunnv Central must be terminated The Sunnv String Monitors are not terminated upon deliverv so that thev can be configured as required on site The Ethernet hubs in the Sunnv Central are terminated upon deliverv 38 SSMxx 2 1 IA BS JP en 20 Installation Manual SMA Solar Technologv AG 7 Commissioning SUNNY SUNNY SUNNY SUNNY CENTRAL STRING MONITOR STRING MONITOR STRING MONITOR e e Not Not Terminated terminated terminated SUNNY SUNNY SUNNY STRING MONITOR STRING MONITOR STRING MONITOR e e o SUNNY CENTRAL Not Not Terminated terminated terminated SUNNY SUNNY SUNNY mE STRING MONITOR STRING MONITOR STRING MONITOR e e o Not Not Terminated terminated terminated Figure 16 Termination of the Sunny String Monitors example Requirement LI All Sunny String Monitors in a string are connected to the RS485 communication bus see Section 6 7 Connecting the Data Cables page 31 Procedure 1 In the last Sunny String Mo
11. 1000 1 000 Vpc AO kA 20 kA Connector 0 08 mm to 2 5 mm M25 mm to 14 mm Li2YCYv TP 4x2x0 5 mm IP54 3 40 C to 50 C 40 C to 70 C 0 to 95 2 000 m AC2 Installation Manual SMA Solar Technologv AG 13 Contact 13 Contact If vou have technical problems concerning our products contact our SMA Service Line We need the following information in order to provide vou with the necessarv assistance e Sunny String Monitor type Serial number of the Sunny String Monitor Type and number of PV modules connected Type of communication Fault or warning number displayed Display message on the Sunny Central Australia Argentina Brasil Chile Peru Danmark Deutschland Osterreich Schweiz Espafia Portugal South Africa Installation Manual SMA Australia Pty Ltd Sydney Toll free for Australia 1800 SMA AUS 1800 762 287 International 61 2 9491 4200 SMA South America SPA Santiago 562 2820 2101 SMA Solar Technology AG Niestetal SMA Online Service Center www SMA de Service Sunny Boy Sunny Mini Central Sunny Tripower 49 561 9522 1499 Monitoring Systems Kommunikationsprodukte 49 561 9522 2499 Fuel Save Controller PV Diesel Hvbrid systeme 49 561 9522 3199 Sunny Island Sunny Backup Hydro Boy 49 561 9522 399 Sunny Central 49 561 9522 299 SMA lberica Tecnologia Solar S L U Barcelona 34 935 63 50 99 SMA Solar Technology South A
12. 13 Installation Manual SSMxx 2 1 1A BS JP en 20 35 6 Electrical Connection SMA Solar Technologv AG 3 Connect the conductors of the data cables to the female connector of the connectors in accordance with the circuit diagram The conductors for the voltage supply must be drilled pairs e Hold the actuation lever down e Insert the insulated conductor let go of the actuation lever Ensure that the insulated conductors are firmly in place 4 Shorten all other conductors flush with the cable sheath 5 Clamp the data cables into the respective shield clamp 6 Fasten the data cable glands 36 SSMxx 2 l IA BS JP en 20 Installation Manual SMA Solar Technologv AG 6 Electrical Connection Connecting the Connectors in the Sunnv String Monitor Insert the connectors with the connected data cables into the pin connectors of the terminals X712 and X713 6 7 4 Connecting the Data Cables in the Sunny Central In the inverter the data cables are connected to a separate connecting terminal plate There are three communication terminals to each of which up to ten String Monitor Units can be connected for information on how to connect Sunny String Monitors to Sunny Central inverters of the CP production series see the installation manual of the respective central inverter Installation Manual SSMxx 2 1 1A BS JP en 20 37 7 Commissioning SMA Solar Technologv AG 7 Commissioning 7 1 Safety during Commis
13. 15 2 6 LEDs onin Sting M nior 8 A aid 16 T o Ee GA 5 a e At a ia dali 16 S MOUNN L oce tila tar aa boe e 18 HE Glossario 18 Si CISC ME the Mounino Locaion Sa siii tentata lipidi 18 5 1 2 Mounting the Sunny String Monitor x 2d ena dak ee ebbe bees noted Bede a a E D ka ck we las uta dd 18 2 BIS Movida Pea eee a BE e MDA ae oe eae 20 5 2 1 Selecting ine Mounting LOCGHON es 3 9 oec t bidt dou art Ead diac EUER d denne wok 20 522 Mounino he Ba E 4 ale ie e bt Are tec td d aa secu FAVA a dep d Mu tea taf ue 20 5 2 3 Mounting the Sunny String Monitor on the Base 6 liliis e 21 6 iEle irical Gonriectioti six derrate a 23 6 l Sale during Electrical Connection ses aao dos m eate tera d e ario aan anm va d adus M ep toe UR 23 6 2 Inserting the Cables into the Switch Cabinet 23 6 3 Overview of the Connection Area 25 Od SSMS IBS SSM TOU BS ase Le rtl capri 25 032 JSSM8 2 L BSJP SSM TO EBSJP rere Ib Ba Padi re e Eo dae ee aa 26 6A Connecting the string Cables sa 4 aod eter Lal den LR REC Alta nati 26 6 5 Connecimg the DC Mai Gables seu botte Fatto edet tod eratac em ded oe ua ets eos d debitae dcs 27 6 5 h able REGU rem SiS iii ieda da da So te ede ke Tad ie d pes queo ee duis e iet at dol 27 6 5 2 Connecting DC Main Cables to the Busbar neto biu REEKEEGE ke p e RE PRU tony A bn b e 28 6 5 3 Connecting DC Main Cables to the Terminals LL 29 6 6 Connecting the Grounding Cable 1 1 12 6ebRPR 14S RO A alii lion 30 6 6 1 C
14. Cables in the SSMxx 21 BS The Sunny String Monitors must be connected to the RS485 communication bus This means that two data cables will be connected to each Sunny String Monitor Only one data cable is connected and terminated in the last Sunny String Monitor G mm mp um uu um wu um om ee um n thm Him Z Figure 14 Connection of Sunny String Monitors to the RS485 communication bus example Installation Manual SSMxx 2 1 1A BS JP en 20 3 6 Electrical Connection SMA Solar Technologv AG lil Limited number of String Monitor Units per Ethernet hub Since the String Monitor Unit measurement PCBs are supplied with voltage via the data cables the number of connected String Monitor Units is limited Do not connect more than ten String Monitor Units per Ethernet hub The various types of Sunny String Monitors are equipped with differing numbers of String Monitor Units e Sunny String Monitor SSM8 2 1 1 String Monitor Unit e Sunny String Mo
15. Ensure that no further contamination occurs on the insulated conductors 4 If you do not connect the insulated conductors within ten minutes after cleaning grease the insulated conductors This prevents the formation of an oxide film Cn Unscrew the set screw with an Allen key 6 A WARNING Risk of fire from contact failure if grease comes into contact with the set screw Grease on the set screw can result in failure to achieve the prescribed torque Contact failure and increased transition resistances are the result Insert the insulated conductors into the terminal from below Ensure that no grease comes into contact with the set screw 7 Fasten the set screw torque 32 Nm 8 Ensure that the DC main cables are securely in place 6 6 Connecting the Grounding Cable 6 6 1 Connecting the Grounding Cable in the SSMxx21 BS In order to guarantee the function of the surge arrester it must be connected to the external grounding Cable requirement O Conductor cross section 16 mm to 25 mm Requirement The grounding cable must be routed into the Sunny String Monitor through the cable gland see Section 6 2 page 23 Procedure 1 Strip off the grounding cable insulation by 16 mm 2 Connect the grounding cable to the screw terminal of the surge arrester torque 2 5 Nm 3 Ensure that the grounding cable is securely in place 4 Ground the grounding cable in the vicinity of the Sunny String Monitor e g by means
16. Installation Manual SUNNY STRING MONITOR SSM8 21 BS SSM16 21 BS SSM8 21 BS JP SSM16 21 BS JP SSMxx 2 1 IA BS JP en 20 98 116700 03 Version 2 0 ENGLISH Legal Provisions SMA Solar Technologv AG Legal Provisions The information contained in this document is the propertv of SMA Solar Technologv AG Publishing its content either partially or in full requires the written permission of SMA Solar Technology AG Any internal company copying of the document for the purposes of evaluating the product or its correct implementation is allowed and does not require permission SMA Warranty You can download the current warranty conditions from the Internet at www SMA Solar com Trademarks All trademarks are recognized even if not explicitly identified as such A lack of identification does not mean that a
17. capirci Dipinti ladibi 45 10 5 Checking the Inside of the Enclosure L en tenet nn 45 TO Gy Checking ihe Base lola ecc cocina dude aotearoa A5 10 7 Checking the Covers and Labels 22 Leila ebbe d edet gd 46 10 9 Checking tneskise blolders 2s si eres da latini eo opido ins pa ab tienne iode n sc an a A7 10 9 Checking the Bolted Clamp and Plug Connections LL 47 10 10 Checking the Surge Arrester for the DC Main Cable 47 10 11 Checking the Surge Arrester for RS485 Communication LL 48 10 2 Checking the Supply Voldoe d ocieecu trend bei 48 10 13 Checking the Ground Connection nusa a mE ld iaia n 49 10 14 Checking the LEDs of the String Monitor Unit 49 LT DECOMMISSIONING sissi A ee desde dade 50 11 1 Disassembling the Sunny String Monitor 0 0 50 11 2 Disposing of the Sunny String Monitor rara aa ana 50 12 Technical Dalai ooo na ta IT RI 51 F3 CONA is a els ps ad d e d a sere 55 A SSMxx 2 1 IA BS JP en 20 Installation Manual SMA Solar Technologv AG 1 Information on this Document 1 Information on this Document Validity This document is valid for the following device types from the indicated production version Device type From production version SSM8 21 BS BA SSM16 21 BS B4 SSM8 21 BS JP Al SSM16 21 BS JP Al Target Group The activities described in this document must only be performed by qualified persons Qualified persons must have the following skills Knowledge of how the device works and is op
18. cted over several query intervals and distinguished from typical current fluctuations of the PV array The sections below describe the conditions under which the string current is monitored e the intervals at which data is transmitted the key parameters for the sensitivity of the string current monitoring Requirements for Activating the String Current Monitoring LI The DC power Ppc of the PV array exceeds 5 of the nominal AC power Pac nom of the Sunny Central PPC gt 0 05 PAC nom LI The mean value of the string currents of the individual groups ly string is equal to or greater than 0 5 A IM String 2 05A Error Sum The error sum is a measure of the sensitivity of string current monitoring The error sum can be parameterized via the tripping time and the tolerance and can be calculated using the following formula 12 SSMxx 2 1 IA BS JP en 20 Installation Manual SMA Solar Technologv AG 4 Product Description Tripping time min Tolerance Error sum 76 Polling interval min The individual error sums of the measuring channels are reset at midnight Query Intervals The Sunny String Monitor continuously measures the string currents and performs cyclic storage of the measured values The data logger reads out these values every five minutes Tripping Time The tripping time is the time span between the occurrence of an error and the error message The tripping
19. difference in the above example is 4 5 A which equates to a deviation of 90 from the mean value Assuming that the settings in the above example remain unaltered i e tolerance at 10 and tripping time at 10 minutes the error sum of 20 will already be reached after the first query interval of 5 minutes The data logger now issues an SMU warning 4 3 DC Load Break Switch The Sunny String Monitor can be disconnected on the inverter side by means of a DC load break switch Use of the DC load break switch is only permissible if LV HRC fuses with gPV characteristic are installed upstream in the inverter or the main DC distribution box 14 SSMxx 2 1 IA BS JP en 20 Installation Manual SMA Solar Technologv AG 4 Product Description 4 4 String Fuses The string fuses protect the PV modules of a PV system from reverse currents Only install string fuses supplied or approved by SMA Solar Technology AG as accessories for Sunny String Monitors 34 J 5 Figure 5 Principle of reverse current A reverse current can occur when different open circuit voltages are applied to PV modules connected in parallel In this event the reverse current can be much higher than the short circuit current of the PV modules The higher the reverse current the more the PV modules of the faultv string will heat up Strong heat build up can destrov the modules of the faulty string Reverse current can have the following causes short circuit in one
20. e negative terminal F Terminals for string cables negative terminal 6 4 Connecting the String Cables SMA Solar Technology AG recommends using bootlace ferrules for connecting the string cables to the fuse holders Cable requirements LI PVI F cable must be available Conductor cross section of the string cable for connection of one string cable to the fuse holders 0 75 mm to 16 mm 26 SSMxx 2 1 IA BS JP en 20 Installation Manual SMA Solar Technologv AG 6 Electrical Connection Procedure 1 Attach the string cables to a cable support rail 2 Cut the string cables to length and strip off the insulation by 11 mm 3 If you are using bootlace ferrules mount the bootlace ferrules and crimp gas tight 4 Connect the string cables to the screw terminals of the fuse holders torque 2 5 Nm Ensure correct polaritv 6 5 Connecting the DC Main Cables 6 5 1 Cable Requirements The Sunny String Monitor comes supplied with busbars for connecting the DC cables with terminal lugs If you wish to connect the DC cables directly to the terminals the appropriate terminals are available as accessories NOTICE Failure of data transmission due to incorrect cable installation Non compliance with the minimum clearances between the DC main cables and the data cable may lead to failure of data transmission This can result in yield loss e When laying the DC main cables ensure that the minimum clearance of 400 mm to the data cables is ob
21. e Sunny String Monitor from voltage sources see Section 8 page 41 2 Ensure tightness of the Sunny String Monitor 3 Ensure that the drain plugs are intact and clean A Ensure that there is no condensation water inside the enclosure 10 6 Checking the Base Plate 1 y WP wd Danger to life by electric shock or electric arc if live components are touched e Disconnect the Sunny String Monitor from voltage sources see Section 8 page 41 2 Ensure that all cable glands are sealed and securely in place 3 Ensure that the DC connectors are intact and securely in place Installation Manual SSMxx 2 1 1A BS JP en 20 45 10 Maintenance SMA Solar Technologv AG 10 7 Checking the Covers and Labels A ces A e mmc TX gt T 1 lill e O e e J Db
22. e measuring device PM20 3 to perform the measurements see documentation of the measuring device Check whether the readings are within the tolerance range defined by the lower threshold LLV and the upper threshold ULV Measurement 1 Measurement Measurement 3 2 LLV 182 V IZV OV ULV 279 V 22V IV If the readings are outside the tolerance limits replace the surge arrester 10 12 Checking the Supplv Voltage Required maintenance material not included in the scope of deliverv LI Voltmeter Requirement LI The circuit breaker for the supply voltage of the Sunny Central must be switched on Procedure 1 IV Www Danger to life bv electric shock or electric arc if live components are touched Disconnect the Sunny String Monitor from voltage sources see Section 8 page 41 2 Measure the supplv voltage at the connector on the lowest String Monitor Unit V The supply voltage is at least 30 V X The supply voltage is less than 30 V 48 SSMxx 2 1 IA BS JP en 20 Installation Manual SMA Solar Technologv AG 10 Maintenance Check the terminals Attach the cable if necessary 10 13 Checking the Ground Connection 1 A DANGER Danger to life by electric shock or electric arc if live components are touched Disconnect the Sunny String Monitor from voltage sources see Section 8 page 41 2 Ensure that the ground connection and the contact resistance to the ground potential are correct 10 14 Checking the LEDs of the
23. e of delivery for wall mounting Position Quantity Designation A Sunny String Monitor B Switch cabinet key C 2 Wall mounting rail D 8 Screw for the wall mounting rail E Installation manual circuit diagram lil Accessories Fuses and cvlindrical bridges are available as accessories 10 SSMxx 2 1 IA BS JP en 20 Installation Manual SMA Solar Technologv AG 4 Product Description 4 Product Description 4 1 Sunny String Monitor The Sunny String Monitor is a PV array junction box to which several strings can be connected in parallel The Sunny String Monitor monitors the input currents of the strings and detects failures thus helping to minimize power and yield losses The string currents are monitored by the measurement PCB String Monitor Unit SMU located in the Sunny String Monitor The string fuses in the Sunny String Monitor protect the PV modules of the strings from reverse currents Block Circuit Diagram of the Sunny String Monitor SSM8 21 BS SSM16 21 BS nikil a pS m ORS SS ilsir i a Sei SUNNY STRING MONITOR SUNNY CENTRAL 1 1 l b a i 1 1 l l s Overvoltage protection DC switch RS485 communication f IA Figure 3 Block circuit diagram of the Sunny String Monitor SSM8 2 1 BS SSM 16 2 1 BS Installation Manual SSMxx 2 1 IA BS JP en 20 11 4 P
24. erated Training in how to deal with the dangers and risks associated with installing and using electrical devices and installations Training in the installation and commissioning of electrical devices Knowledge of all applicable standards and directives Knowledge of and compliance with this document and all safety information Additional Information Links to additional information can be found at www SMA Solar com Document title Document type Product Details Features and Mounting Options for SUNNY Technical Information STRING MONITOR SSM8 2 1 BS SSM 16 21 BS SSM8 2 1 BS JP SSM 16 2 1 BS JP Plant Communication in Large Scale PV Power Plants Technical Information SUNNY CENTRAL Operating Manual Operating Manual Explanation A DANGER Indicates a hazardous situation which if not avoided will result in death or serious injury A WARNING Indicates a hazardous situation which if not avoided can result in death or serious injury Indicates a hazardous situation which if not avoided can result in minor or moderate injury INTejilel Indicates a situation which if not avoided can result in propertv damage Information that is important for a specific topic or goal but is not safetv relevant Indicates a requirement for meeting a specific goal Desired result xi miol A problem that might occur Installation Manual SSMxx 2 1 1A BS JP en 20 5 2 Safetv SMA Solar Technologv AG Nomenclature In this docume
25. f up to 70 kg into account Two people are needed to mount the Sunny String Monitor 18 SSMxx 2 1 IA BS JP en 20 Installation Manual SMA Solar Technologv AG 5 Mounting NOTICE Damage to cable glands and plug connections due to improper transport and installation The cable glands and plug connections protrude from the enclosure Ensure that the cable glands and plug connections are not damaged during mounting and transport Additionally required mounting material not included in the scope of delivery e A screws M8 Take wall properties into account when choosing the screws e 4 washers f necessary 4 screw anchors Choose the screw anchors according to the properties of the wall surface 1058 mm 848 mm 654 mm SUNNY STRING MONITOR gt 100 mm 1128 mm al 1158 mm Figure 7 Dimensions of the Sunny String Monitor Procedure 1 Mark the position of the drill holes on the wall or stand 2 Drill holes at the marked positions 3 If necessary insert the screw anchors 4 Attach the two mounting rails to the Sunny String Monitor with the screws supplied torque 15 Nm Installation Manual SSMxx 2 1 1A BS JP en 20 19 5 Mounting SMA Solar Technologv AG 5 Fasten the Sunnv String Moni
26. frica Pty Ltd Centurion Pretoria 08600 SUNNY 08600 78669 International 27 12 622 3000 Belgien Belgique Belgi Luxemburg Luxembourg Nederland Cesko Magyarorszdg Polska Rom nia Slovensko France India E ada K rrpog Kibris bbnrapra SMA Benelux BVBA SPRL Mechelen 32 15 286 730 SMA Central amp Eastern Europe s r o Praha 420 235 010 417 SMA France S A S Lyon Sunny Boy Sunny Mini Central Sunny Tripower 33 472 09 04 40 Monitoring Systems 33 472 09 04 41 Sunny Island 33 472 09 04 42 Sunny Central 33 472 09 04 43 SMA Solar India Pvt Ltd Mumbai 91 22 61713888 SMA Hellas AE ABnva 801 222 9 222 International 30 212 222 9 222 SSMxx 2 1 IA BS JP en 20 I 13 Contact Italia SMA Italia S r l Milano 39 02 8934 7299 Inel SMA Solar Thailand Co Ltd NINIMNTI 66 2 670 6999 c uy SMA Middle East LLC 971 2 234 6177 56 SSMxx 2 1 IA BS JP en 20 United Kingdom SMA Solar Technology AG SMA Solar UK Ltd Milton Keynes 44 1908 304899 SMA Technology Korea Co Ltd ME 82 2 520 2666 International SMA Service Line Niestetal Toll free worldwide 00800 SMA SERVICE 800 762 7378423 Installation Manual SMA Solar Technologv www SMA Solar com
27. he DC load break switch at temperatures below 25 C Danger to life from electric shock due to damaged fuse holders Using the fuse holders at temperatures below 25 C may cause damage to the fuse holders Correct disconnection function can no longer be guaranteed High voltages are present in components that are not properly disconnected Touching live components can result in death or serious injury due to electric shock Do not use the fuse holders at temperatures below 25 C Risk of burns due to hot components or devices Some components of the Sunny String Monitor can get very hot during operation Touching these components can cause burns Observe the warnings on the components During operation do not touch any components or devices marked with such warnings After disconnecting the PV system from voltage sources wait until all hot components have cooled down sufficiently Wear suitable personal protective equipment for all work on the product 8 SSMxx 2 1 IA BS JP en 20 Installation Manual SMA Solar Technologv AG 2 Safetv NOTICE Damage to the PV system due to incorrectly rated fuses If fuses are incorrectly rated excessive reverse currents can destroy the PV modules Observe the maximum current values for Sunny String Monitors when rating the fuses Only install string fuses supplied or approved by SMA Solar Technology AG for Sunny String Monitors Damage to the components due to dust or moisture pe
28. llation Manual SMA Solar Technologv AG 12 Technical Data Enclosure Outdoor installation Material Combustion properties Color UV resistance Wall mounting Base mounting Protective insulation Lock cylinder Cylinder length Cable support rail base available as accessory prepared for customer mounting of a profile half cylinder only for base mounting Mechanical Data of Wall Mounted Device Width of enclosure Width of enclosure including pressure equalization plug Height of enclosure Height of enclosure including cable glands Depth of enclosure Depth of enclosure including lock Maximum weight without base Mechanical Data of Base Mounted Device Width of enclosure Width of enclosure including pressure equalization plug Height of enclosure Height of base Total height Depth of enclosure Depth of enclosure including lock Weight of base Maximum weight with base Burial depth of base base available as accessory Installation Manual 12 Technical Data Shaded Glass fiber reinforced plastic Self extinguishing halogen free RAL7035 Yes Yes Yes Yes Double bit key for switch cabinet 30 10 or 35 10 Yes 1 058 mm 1 088 mm 848 mm 898 mm 245 mm 273 mm 70 kg 1 058 mm 1 088 mm 848 mm 883 mm 1 731 mm 245 mm 273 mm 16 kg 86 kg 595 mm SSMxx 2 1 IA BS JP en 20 51 12 Technical Data Electrical Data PV arrav Maximum DC input voltage Maximum DC output current for SSM8
29. lowest String Monitor Unit 3 Connect the insulated conductors of the data cables to the female connector in accordance with the circuit diagram Hold the actuation lever down e Insert the insulated conductor Terminal Signal Color of insulated conductor Pin 1 GND EXT Conductor pair white brown Pin 2 RS485L green 32 SSMxx 2 1 IA BS JP en 20 Installation Manual SMA Solar Technologv AG 6 Electrical Connection Terminal Signal Color of insulated conductor Pin 3 RS485H vellow Pin 4 60V_EXT Conductor pair gray pink Pin 5 GND EXT Conductor pair white brown Pin 6 RS485L green Pin 7 RS485H yellow Pin 8 60V_EXT Conductor pair gray pink as per DIN EN 47100 the color of the insulated conductor can vary depending on the cable e Let go of the actuation lever Ensure that the insulated conductors are firmly in place 4 Bundle the insulated conductors of the data cables with a cable tie 5 Position the bootlace ferrule between the data cables and the connector 6 Attach the data cables to the connector using two cable ties Installation Manual SSMxx 2 1 1A BS JP en 20 33 6 Electrical Connection SMA Solar Technologv AG Connecting the Connector to the String Monitor Unit Plug the connector with the connected data cables into the pin connector of the lowest String Monitor Unit 6 7 3 Connecting the Data Cable in the SSMxx 21 BS JP The Sunny String Monitors mu
30. m 0 60 x nom fuse 0 55 x nom fuse 16 32 16 32 16 35 Vpc to 55 Voc 280 Apc Type 2 Type 2 Ring terminal lugs for M12 screw 300 mm M40 Installation Manual SMA Solar Technologv AG DC Main Connection to Busbar Sealing range of cable glands M40 Maximum width of the terminal lugs when connecting two cables per potential Suitable connection material Number of cables per potential DC Main Connection to Terminals Tvpe of terminal Maximum conductor cross section Suitable connection material Number of cables per potential Cable gland Sealing range of cable gland Terminals available as accessories Connection of String Cables to Fuse Holder Conductor cross section for one string cable per fuse holder Cable feed through plate Clamping range of cable entry plate Ground Connection in SSMxx 21 BS Terminal Conductor cross section Cable gland Sealing range of cable gland Ground Connection in SSMxx 21 BS JP Terminal Conductor cross section Cable gland Sealing range of cable gland 12 Technical Data 13 mm to 32 mm 55 mm Copper aluminum 1 2 V box terminal 300 mm Copper aluminum 1 2 M40 13 mm to 32 mm 0 75 mm to 16 mm M50 5 0 mm to 10 5 mm Surge arrester 16 mm M25 8 mm to 17 mm Screw terminal 16 mm M25 8 mm to 17 mm Surge Arrester for Communication and Voltage Supply in SSMxx 21 BS JP Type Arrester class Nominal voltage D1 Ligh
31. maged during mounting and transport Procedure 1 Remove four caps in the base plate of the Sunny String Monitor 2 Screw four threaded fittings from underneath into the threaded holes of the base plate Installation Manual SSMxx 2 1 IA BS JP en 20 21 5 Mounting SMA Solar Technologv AG 3 Place the Sunnv String Monitor on the base 4 Fasten the Sunny String Monitor to the base using four fender washers and four nuts torque 10 Nm 5 Ensure that the Sunny String Monitor is securely in place 6 After connecting the cables fasten the kick plate to the inside of the base plate using two locking screws 22 SSMxx 2 1 IA BS JP en 20 Installation Manual SMA Solar Technologv AG 6 Electrical Connection 6 Electrical Connection 6 1 Safetv during Electrical Connection A DANGER Danger to life due to electric shock High voltages are present in the live components of the Sunnv String Monitor Therefore work on the Sunny String Monitor is only allowed if the power is disconnected and the guidelines that apply at the mounting location are strictiv followed e Disconnect from voltage sources Switch off the DC load break switch in the Sunny String Monitor Remove the DC fuses in the central inverter or main DC distribution box when the power is switched off Use an LV HRC fuse extractor Only open the f
32. materials Do not mount the Sunny String Monitor in potentially explosive atmospheres Requirements for the mounting location LI The mounting location must not be in a living or office area LI The mounting location must not block any escape routes LI The mounting location must be freely and safely accessible at all times without the necessity for any auxiliary equipment such as scaffolding or lifting platforms Non fulfillment of these criteria may restrict servicing LI The mounting location must be suitable for the weight and dimensions of the Sunny StringMonitor see Section 12 Technical Data page 51 LI The mounting location must not be exposed to direct solar irradiation Requirements for mounting Mount the Sunny String Monitor so that the connection area is facing downwards Do not mount the Sunny String Monitor in a horizontal or inclined position An external cable support rail must be provided Example Mounting the Sunny String Monitor IF the PV array is mounted on a free standing structure the AN Sunny String Monitor can be fixed to this structure in a shaded position Make sure that the Sunny String Monitor enclosure is not mounted in the path of rainwater flowing off the module surface O Ass A L 7 5 1 2 Mounting the Sunny String Monitor Danger of crushing if the Sunny String Monitor is dropped When mounting the Sunny String Monitor take the weight o
33. netration Dust intrusion or moisture penetration can damage the components of the Sunny String Monitor or impair their functionality e Do not open the Sunny String Monitor during a sand storm rainfall or humidity of more than 95 Only carry out maintenance work on the Sunny String Monitor if the environment is dry and sand free e Always lock the Sunny String Monitor Always store the Sunny String Monitor in an upright position with the connection area facing downwards Damage to electronic components due to electrostatic discharge Electrostatic discharge can damage or destroy electronic components When working on the Sunny String Monitor and handling components observe all ESD safety regulations Wear suitable personal protective equipment for all work on the product e Discharge electrostatic charge by touching uncoated grounded enclosure parts e g at the grounding conductor connection on the doors Only then is it safe to touch electronic components Installation Manual SSMxx 2 1 1A BS JP en 20 9 3 Scope of Delivery SMA Solar Technology AG 3 Scope of Delivery Check the scope of delivery for completeness and any externally visible damage Contact your distributor if the scope of delivery is incomplete or damaged Sunny String Monitor for Wall Mounting A B C D E A Figure 2 Components included in the scop
34. nitor SSM 16 21 2 String Monitor Units The data cables are connected to the lowest String Monitor Unit measurement PCB via a connector Procedure To connect the data cables in the Sunny String Monitor carry out the following steps in the given sequence The exact procedure is described in the following sections Preparing the data cables Connecting the data cables to the connectors Connecting the connector to the String Monitor Unit Preparing the Data Cables Requirement The data cables must be routed into the Sunny String Monitor through the cable glands see Section 6 2 Inserting the Cables into the Switch Cabinet page 23 Additionally required material not included in the scope of delivery O 1 bootlace ferrule for conductor cross section 6 mm2 Procedure 1 Dismantle the data cables by 100 mm Unravel the cable shield of the data cables Push the unraveled cable shield to one side of each data cable and twist If you are connecting two data cables twist the cable shields of the data cables together Shorten the twisted cable shield to 20 mm O C1 a OON Mount the bootlace ferrule on the twisted cable shield and crimp Connecting the Data Cables to the Connectors Additionally required material not included in the scope of delivery 3 cable ties dimensions 100 mm x 2 5 mm Procedure 1 Strip off the insulated conductors of the data cables by 10 mm 2 Remove the connector of the
35. nitor of each string plug the jumper into 4 pin header S1 at position T on the lowest String Monitor Unit i 7 ao Lf In Z 2 Make sure that in the other Sunny String Monitors of the string the jumpers are plugged into pin header S1 at position P of the lowest String Monitor Unit Installation Manual SSMxx 2 1 IA BS JP en 20 39 7 Commissioning SMA Solar Technologv AG 7 2 3 Noting Down the Serial Number of the String Monitor Unit The serial number clearly identifies the String Monitor Unit The serial number can be found on the type label at the bottom right hand corner of the String Monitor Unit You will need the serial numbers for detecting the String Monitor Units All serial numbers of the String Monitor Units must be noted in the commissioning report EE D0 JO XXXXXXXXXXX XXXXX XXX AXXXXX XX Figure 17 Position of the serial number on the String Monitor Unit Position Designation A Serial number of the String Monitor Unit Procedure e Identify the serial numbers of the String Monitor Units and note them in the commissioning report 7 3 Switching On the Sunny String Monitor Fire risk caused by incorrect rating of string fuses or by use of incorrect string fuses Ensure that the rating of the string fuses is correct e Only install string fuses supplied or approved by SMA Solar Technology AG for Sunny String Monitors
36. nstallation Manual SSMxx 2 1 1A BS JP en 20 25 6 Electrical Connection SMA Solar Technologv AG 6 3 2 SSM8 21 BS JP SSM16 21 BS JP The features of the Sunny String Monitor are dependent on the order option The maximum configuration of the Sunnv String Monitor is shown in the overview diagrams a o 0 0 Me Bl E aj B N Bl E aj B Mc Gi 0 0 0 Me Ho o or E 0 0 NEN E G 0 HEN E aj o 40 Q Mil 9 a L j isi 0 o 0 0 B Bl E 23 B B Bl E 3 EE B NEN NEN B 0 0 o o B O aj B N 0 B Qj B N e _ sitc _seEe las m a e lii UB GW UN IS GS HAW A A F Figure 11 Connections with the SSM16 21 BS JP as an example Position Designation A Terminals for string cables positive terminal B Terminal for data cables C Terminal for DC main cable positive terminal D Grounding cable connection E Terminal for DC main cabl
37. nt the device types of the Sunny String Monitor are referred to as Sunny String Monitor 2 Safety 2 1 Intended Use The Sunny String Monitor is a PV array junction box to which several strings can be connected in parallel The Sunny String Monitor monitors the input currents of the strings and detects failures thus helping to minimize power and yield losses A Figure 1 Principle of a grid tie PV system Position Designation A PV array B Sunny String Monitor C Inverter D MV transformer E Utility grid The maximum current values for the Sunny String Monitors must not be exceeded The Sunny String Monitor is suitable for indoor and outdoor use The Sunny String Monitor can be used in large scale PV power plants with Sunny Central inverters For the optimum operation of the Sunny String Monitor observe the mounting location requirements see Section 12 Technical Data page 51 Alterations to the product e g modifications or conversions are only permitted with the express written permission of SMA Solar Technology AG Unauthorized alterations will void guarantee and warranty claims and usually void the operating license SMA Solar Technology AG shall not be held liable for any damage caused by such changes Any use of the product other than that described in the Intended Use section does not qualify as appropriate The enclosed documentation is an integral part of this product Keep the documentation in a convenient place f
38. onnecting the Grounding Cable in the SSMxx21 BS LL nn nn 30 6 6 2 Connecting the Grounding Cable in the SSMxx21 BSJP LL 31 6 7 Connecting the Data Cables ss du tapiti ez ses ian ona 31 67 Sable Reguiremblisussessteeben edad aa acd ita ei 31 6 7 2 Connecting the Data Cables in the S SMxx 21 BS LL 31 6 7 3 Connecting the Data Cable in ihe SSMooc2 L BSJP o1 cod beds bike fi da e be i 34 6 7 4 Connecting the Data Cables in the Sunny Central 37 7 COMMS SONNI sies be E redu PSI eee abete a 38 7 1 Salem during Commissioning ik oe qt eai eri A aps ORI b I e D EO dd 38 Installation Manual SSMxx 2 1 1A BS JP en 20 3 Inhaltsverzeichnis SMA Solar Technologv AG 7 2 Commissioning the Sunny Sting MOoniorsa giaro lira lolita 38 7 2 1 Requirements for Commissioning su esaet dur ie nera rana 38 7 2 2 Terminating the Data Cables sassi iii idea a 38 7 2 3 Noting Down the Serial Number of the String Monitor Unit 40 7 3 Switching On the Sunny Sing ORIIOD ritira RE aa 40 8 Disconnectingthe Sunny String Monitor L sssssseneenesesesesneseseneseswewas 41 9 Troublesnootita is arose instant VERS a ee i 42 IO Maintenance 5v eh Ee P PRO thee ee eh IE PU eh o ee Sia as 43 10 1 Maintenance Internals 20 iet iiec DER et bett dere trabba aa diel ds b b e 43 10 2 Overview or the Main Components x4 aide amer alieni deal 3 dep tassa 43 10 3 Checking the Mounting Location and the Installation 45 10 4 Checking ihe Enclosure a
39. or future reference and observe all instructions contained therein Only use the Sunny String Monitor in accordance with the information provided in the enclosed documentation Any other use can result in personal injury or property damage 6 SSMxx 2 1 IA BS JP en 20 Installation Manual SMA Solar Technologv AG 2 Safetv 2 2 Safety Information This section contains safety information that must be observed at all times when working on or with the product To prevent personal injury and property damage and to ensure long term operation of the product read this section carefully and observe all safety information at all times A DANGER Danger to life from electric shock due to live voltage High voltages are present in the live components of the Sunny String Monitor Touching live components results in death or serious injury due to electric shock Wear personal protective equipment when working on the Sunny String Monitor Do not touch live components Before performing any work always disconnect the Sunny String Monitor from voltage sources unless supply voltage is absolutely necessary Switch off the DC load break switch in the Sunny String Monitor Remove the DC fuses in the central inverter or main DC distribution box when the power is switched off Use the LV HRC fuse handle Only open the fuse holders in the Sunny String Monitor when the power is switched off Ensure that the device cannot be reconnected Ens
40. or more modules short circuit in one or more cells of a module double ground fault in a module double ground fault in the cabling The string fuses trip when the string current is too high and protect the PV modules of the faulty string The Sunny String Monitor informs the inverter of the string failure In the case of grounded PV arrays the positive or the negative terminal can be grounded in the inverter To do this cylindrical bridges are fitted in the Sunny String Monitor instead of string fuses Cylindrical bridges are available as accessories 4 5 Overvoltage Protection Depending on the device type the Sunny String Monitor is equipped with one or two surge arresters for overvoltage protection In order to guarantee the overvoltage protection function the surge arrester must be connected to the external grounding Components to be protected SSMxx 21 BS SSMxx 21 BS JP DC main cable of the Sunny String Monitor 4 J RS485 interface and RS485 communication x 4 bus Installation Manual SSMxx 2 l IA BS JP en 20 15 4 Product Description SMA Solar Technology AG Components to be protected SSMxx 21 BS SSMxx 21 BS JP Voltage supply to the Sunny String Monitor x 4 The integrated surge arrester for the DC main cable can be monitored via the Sunny StringMonitor 4 6 LEDson the String Monitor Unit The LEDs are installed on the String Monitor Unit You can determine the status of the communication voltage supply or surge arreste
41. ors are intact and securely in place 10 10 Checking the Surge Arrester for the DC Main Cable 1 ay WP wd Danger to life by electric shock or electric arc if live components are touched e Disconnect the Sunny String Monitor from voltage sources see Section 8 page 41 2 Check whether the ready indicator on the surge arrester is red IF the ready indicator is red replace the protection module Installation Manual SSMxx 2 l IA BS JP en 20 A7 10 Maintenance SMA Solar Technology AG 10 11 Checking the Surge Arrester for RS485 Communication In device type SSMxx 2 1 BS JP there is a surge arrester for RS485 communication installed Additionally required material not included in the scope of delivery LI Measuring device DEHNrecorder LC M3 LI Measuring device PM20 LI Test adapter PA BXT Procedure 1 y Ned Danger to life bv electric shock or electric arc if live components are touched Disconnect the Sunny String Monitor from voltage sources see Section 8 page 41 2 For the surge arrester BVT ALD 60 use the measuring device PM20 3 to perform the measurements see documentation of the measuring device Check whether the readings are within the tolerance range defined by the lower threshold LLV and the upper threshold ULV Measurement 1 Measurement Measurement 3 2 LLV OV 73 V OV ULV 219V 83 V IV If the readings are outside the tolerance limits replace the surge arrester 3 For the module BXT ML2 BD use th
42. oth and ethanol cleaning agent Do not touch the contact surfaces after cleaning 4 Connect the DC main cables in accordance with the circuit diagram torque 60 Nm Only use the supplied fastening material and connect a maximum of two adjacent DC main cables to each busbar 5 Secure the DC main cables to the cable support rail 28 SSMxx 2 1 IA BS JP en 20 Installation Manual SMA Solar Technologv AG 6 Electrical Connection 6 5 3 Connecting DC Main Cables to the Terminals The terminals are available as accessories Mounting Terminals to the Busbar D Figure 13 Connection of terminals to busbars Position Designation Screw M12 Spring washer Fender washer Tin plated copper bar Terminal Nut M12 M IMOJOJPVIP Additionally required material LI Ethanol cleaning agent LI Clean cloth Procedure 1 Wipe the contact surfaces on the busbar and the terminal with a clean cloth and ethanol cleaner Do not touch the surfaces once they have been cleaned 2 Mountthe terminals on the busbar torque 60 Nm Only use the supplied screws nuts and washers and make sure that the screw heads always point backwards Connecting Copper Cables to the Terminals 1 Strip off the DC main cable insulations by 35 mm 2 Connect the DC main cables to the terminals Unscrew the
43. product or symbol is not trademarked The BLUETOOTH word mark and logos are registered trademarks owned by Bluetooth SIG Inc and any use of these marks by SMA Solar Technology AG is under license Modbus is a registered trademark of Schneider Electric and is licensed by the Modbus Organization Inc QR Code is a registered trademark of DENSO WAVE INCORPORATED Phillips and Pozidriv are registered trademarks of Phillips Screw Company Torx is a registered trademark of Acument Global Technologies Inc SMA Solar Technology AG Sonnenallee 1 34266 Niestetal Germanv Tel 49 561 9522 0 Fax 49 561 9522 100 www SMA de E mail info SMA de 2004 bis 2015 SMA Solar Technology AG Alle Rechte vorbehalten 2 SSMxx 2 1 IA BS JP en 20 Installation Manual SMA Solar Technologv AG Inhaltsverzeichnis Inhaltsverzeichnis 1 Information on this Document ser k REVO die Id Dion beka 5 2 Sdlely oc obe ebbe Vedan dies abies d Uus eni 6 Lil ended Usi art ii ine Rd ae GID wien a P Our d A A ae GA E Tata al 6 22 a 1120 A NMOMMONOMN MPATT 7 9 Scope orDeliveryasssssioriia nitore aae C EH e edi 10 Product Descriplioniss ssi a Ae Mee Ua eee AL AUR UR UA 11 Acli SUNNY SINAG MONIO ded gail se wis eee 11 2 2 Sining Curen MORIOIIg uses Saee n ich bere Cored a a deer 12 2 9 DE lode Breaks cranica ila taria taa Deal i tt TA e ciue tet aaa Dc Serbs 14 44 o A ee E Ae ieri eee ees 15 2 5 Ovenoli e Proteci n errs eireta aaa a obe e ee
44. r to life by electric shock or electric arc if live components are touched e Disconnect the Sunny String Monitor from voltage sources see Section 8 page 41 2 Check whether the warning labels on and inside the device are damaged or missing Replace warning labels if damaged or missing Select a warning label that is correct for the product version 3 Check that the cover latches are undamaged and securely in place IF the cover latches are damaged or loose they must be replaced 10 8 Checking the Fuse Holders 1 A DANGER Danger to life due to electric arcs when opening the fuse holders Only open the fuse holders in the Sunny String Monitor when the power is switched off 2 Check the fuse holders for discoloration or changed appearance IF they are discolored or changed in any way contact the SMA Service Line 3 Ensure that each fuse holder opens and closes properly 10 9 Checking the Bolted Clamp and Plug Connections 1 y WP wd Danger to life by electric shock or electric arc if live components are touched e Disconnect the Sunny String Monitor from voltage sources see Section 8 page 41 2 Ensure that the bolted connections of the power cables are securely in place 3 Check whether there is any discoloration or change in appearance of the bolted connections at the insulation or the terminals IF the bolted connections and terminals show discoloration or a changed appearance replace them 4 Ensure that all connect
45. rents The use of a base filler will prevent the formation of condensation Use a base filler when installing the base 20 SSMxx 2 1 IA BS JP en 20 Installation Manual SMA Solar Technologv AG 5 Mounting l 1060 mm l 245 mm _ Figure 8 Dimensions of the base foundation Procedure 1 Excavate a pit Make sure to observe the burial depth for the base Tip the maximum burial depth is marked on the sides of the Sunny String Monitor Position the base in the excavated pit so that the side with the kick plate faces the front Remove the upper kick plate Lay the connection cables in the correct positions in the base HalHill the pit with sand or fine gravel Ona sa C h2 Fill the remaining base area with base filler 5 2 3 Mounting the Sunny String Monitor on the Base Additionally required mounting material included in the scope of delivery of the accessories 1 base 4 nuts LI 4 threaded fittings LI 4 fender washers LI 2 locking screws for the kick plate Danger of crushing if the Sunny String Monitor is dropped e When mounting the Sunny String Monitor take the weight of up to 70 kg into account Two people are needed to mount the Sunny String Monitor NOTICE Damage to cable glands and plug connections due to improper transport and installation The cable glands and plug connections protrude from the enclosure Ensure that the cable glands and plug connections are not da
46. roduct Description SMA Solar Technology AG Block Circuit Diagram of the Sunny String Monitor SSM8 21 BS JP SSM16 21 BS JP PS E SS SS Sf RSS SS SS SS SS SS SS SS SS SS sj memes SUNNY STRINC MONITOR pene vi SUNNY CENTRAL Le FI FEMM at SMU8 estiza SAW L i Led o OEO Oe NECS M Des i ST 2 L zm gt Ml i cam ete alee l I l l l i l i Rie ki c i ase eee an i i FI6 32 L E dl l o st Overvoltage protection o e O mm b RS485 communication l MEE I Soc coccocceccceeodcod f A A ease Figure 4 Block circuit diagram of the Sunny String Monitor SSM8 2 1 BS JP SSM 1 6 2 1 BS JP 4 2 String Current Monitoring The string currents are monitored via the measurement PCB String Monitor Unit The String Monitor Unit measures the string currents and continuously calculates the mean values of the string currents The string currents are compared with the mean values If a string current exceeds or falls short of the mean value by the set tolerance value the warning 380 SMU is displayed With central inverters you can use the user interface to set the parameters for the string current monitoring and read off the mean values see operating manual of the respective central inverter The total failure of a string can be detected via the parameters set Marginally increased string currents are reliably dete
47. rs via the LEDs A B usen alo cal a B onmi AS zu AN A eee bo du E Lb E m EN i bu il m E m NE Ed RS ia l u n nu al E mm EE Figure 6 LEDs on the String Monitor Unit Designation Name of LED Status Explanation A DINI glowing green The surge arrester is active off The surge arrester has tripped B RS485 off No data is being exchanged via the RS485 interface glowing yellow Data is being transmitted via the RS485 interface C Error off The String Monitor Unit is functioning correctly glowing red The String Monitor Unit is defective 4 7 Type Label The type label clearly identifies the Sunny String Monitor There are two type labels attached to the Sunny String Monitor The type labels are located inside the right hand door and on the right hand outside panel of the Sunny String Monitor You will find the following information on the type label Device type and option code e Serial number Production version e Device specific characteristics You will require the information on the type label to use the product safely and when seeking customer support from the SMA Service Line The type label must remain permanently attached to the product 16 SSMxx 2 l IA BS JP en 20 Installation Manual SMA Solar Technologv AG 4 Product De
48. s 3 Cut the string cables to length Leading the Cables through the Cable Glands with Sealing Ring Cut Outs NOTICE Damage to the Sunny String Monitor due to moisture penetration Moisture can penetrate the Sunny String Monitor through unsealed cable glands e Only remove the required number of sealing rings from the sealing plugs of the cable glands to match the cable diameter NOTICE Damage to the cable gland for DC main cables due to incorrectly inserted cables The DC main cables must be inserted straight through the cable gland Any transverse stress on the cable gland due to skewed insertion of cables can damage the cable gland and the base plate of the Sunny String Monitor Ensure that the DC main cables are led straight through the cable gland Lead each cable through the cable glands as described below Procedure 1 Remove the sealing plug from the cable gland 2 Adjust the sealing plug to the diameter of the cable to be inserted To do this cut out the required number of sealing rings from the center of the sealing plug 3 Lead the cable through the swivel nut of the cable gland Ensure that the thread of the swivel nut is facing upwards 4 Lead the cable through the sealing plug 5 Insert the sealing plug with the cable into the cable gland 6 Cut the cable to length 7 Firmly tighten the cable gland torque 5 Nm 24 SSMxx 2 1 IA BS JP en 20 Installation Manual SMA Solar Technologv AG 6 Elec
49. s of the Sunny String Monitor with SSM16 21 BS as an example Position Designation A Terminals for string cables positive terminal B Terminal for data cables C Terminal for DC main cable positive terminal D Terminal for grounding cable E Terminal for DC main cable negative terminal F Terminals for string cables negative terminal G Condensate drain H Cable feed through plate 44 Cable gland with sealing ring cut outs SSMxx 2 1 IA BS JP en 20 Installation Manual SMA Solar Technologv AG 10 Maintenance Position Designation K Sealing plug L Cable gland with sealing ring cut outs M Cable gland with sealing ring cut outs N Sealing plug 10 3 Checking the Mounting Location and the Installation e Remove all inflammable materials Ensure that the Sunny String Monitor is securely in place Ensure that the Sunny String Monitor is not exposed to direct solar irradiation Ensure that the mounting location is accessible at all times 10 4 Checking the Enclosure Check whether the enclosure is damaged If the enclosure is badly damaged or cracked it must be replaced Check whether the seals are damaged IF the seals are damaged replace them Ensure that the vent plugs in the enclosure are intact and clean Ensure that the lock is intact and functional 10 5 Checking the Inside of the Enclosure 1 ay WP WwId3 Danger to life by electric shock or electric arc if live components are touched e Disconnect th
50. scription Symbols on the Type Label Symbol CE DAI IP54 Installation Manual Explanation Danger to life due to high voltages The product operates at high voltages All work on the product must be carried out by qualified persons only Risk of burns due to hot surfaces The product can get hot during operation Avoid contact during operation Allow the product to cool down sufficientiv before carrving out anv work Wear personal protective equipment such as safetv gloves Observe the documentation Observe all documentation supplied with the product CE marking The product complies with the requirements of the applicable EU directives WEEE designation Do not dispose of the product together with the household waste but in accordance with the locally applicable disposal regulations for electronic waste Degree of protection The product is protected against interior dust deposits and splashing water from all angles SSMxx 2 1 IA BS JP en 20 17 5 Mounting SMA Solar Technologv AG 5 Mounting 5 1 Wall Mounting 5 1 1 Selecting the Mounting Location Fire hazard due to wrong choice of mounting location Under fault conditions electric arcs may occur in the Sunny String Monitor Electric arcs can cause fires if the Sunny String Monitor is mounted on flammable materials Do not mount the Sunny String Monitor on flammable construction materials Do not mount the Sunny String Monitor near highly flammable
51. served Requirements for DC main cables and terminal lugs LI Use copper or aluminum cables only LI Use only tin plated copper ring terminal lugs for copper cables or bimetal ring terminal lugs for aluminum cables LI The width of the terminal lug contact surface must exceed the diameter of the washers 32 mm Requirements for DC main cables for connection to terminals available as accessories LI Use copper or aluminum cables only LI The conductor cross sections of the DC main cables must be selected correctly Conductor type Conductor cross section Round single strand 25 mm to 150 mm Round multi strand 25 mm to 300 mm Sectoral single strand 25 mm to 240 mm Sectoral multi strand 25 mm to 240 mm Installation Manual SSMxx 2 1 1A BS JP en 20 27 6 Electrical Connection SMA Solar Technologv AG 6 5 2 Connecting DC Main Cables to the Busbar K Figure 12 Assembly of the connection with a ring terminal lug Position Designation Screw M12 Spring washer Fender washer Tin plated copper bar Tin plated ring terminal lug Nut M12 nimio ou Additionally required material not included in the scope of delivery LI Ring terminal lugs size for M12 screw Clean cloth Ethanol cleaning agent Procedure 1 Strip off the DC main cable insulation 2 Fit the DC main cables with ring terminal lugs 3 Clean the contact surfaces using a clean cl
52. sioning A DANGER Danger to life from electric shock due to live voltage High voltages are present in the live components of the Sunny String Monitor Touching live components results in death or serious injury due to electric shock Wear personal protective equipment when working on the Sunny String Monitor Do not touch live components Before performing any work always disconnect the Sunny String Monitor from voltage sources unless supply voltage is absolutely necessary Switch off the DC load break switch in the Sunny String Monitor Remove the DC fuses in the central inverter or main DC distribution box when the power is switched off Use the LV HRC fuse handle Only open the fuse holders in the Sunny String Monitor when the power is switched off Ensure that the device cannot be reconnected Ensure that no voltage is present Ground and short circuit the device Cover or isolate any adjacent live components Protective covers must always be mounted 7 2 Commissioning the Sunny String Monitor 7 2 1 Requirements for Commissioning lil Commissioning is to be performed by Service employees only Commissioning of the Sunny String Monitor must be performed by Service employees of SMA Solar Technology AG or their authorized representatives only The commissioning report must be completed during commissioning Requirements LI The DC load break switch must be switched off LI The DC main cables must be connected to
53. st be connected to the RS485 communication bus and supplied with voltage The RS485 data cables and the voltage supply are connected jointly in one data cable to terminals X712 and X713 by means of a connector This means that two data cables will be connected to each Sunny String Monitor Only one data cable is connected and terminated at the last Sunny String Monitor que mm pel ET EMIT l i A TEE WA Figure 15 Connection of Sunny String Monitors to the RS485 communication bus example lil Limited number of String Monitor Units per Ethernet hub Since the String Monitor Unit measurement PCBs are supplied with voltage via the data cables the number of connected String Monitor Units is limited Do not connect more than ten String Monitor Units per Ethernet hub The various types of Sunny String Monitors are equipped with differing numbers of String Monitor Units e Sunny String Monitor SSM8 21 1 String Monitor Unit e Sunny String Monitor SSM 16 21 2 S
54. t the surge arrester for overvoltage protection is functioning The String Monitor Unit is defective Corrective measures e Contact the SMA Service Line The data cable is damaged or not properly connected and terminated Corrective measures Ensure that the data cable is connected correctly see Section 6 7 Connecting the Data Cables page 31 Ensure that the cabling between the Sunny Central and the Sunny String Monitors is OK Ensure that the data cable in the last Sunny String Monitor of a string is terminated see Section 7 2 2 Terminating the Data Cable page 38 The serial interface is not correctly configured Corrective measures Configure the serial interface correctly see user manual of the inverter 42 SSMxx 2 1 IA BS JP en 20 Installation Manual 10 Maintenance SMA Solar Technology AG 10 Maintenance 10 1 Maintenance Interval Maintenance is to be performed on the Sunny String Monitor every 24 months 10 2 Overview of the Main Components c uc Lr cI FI Em II cJ e CTT eme O i i l i ii i iekboeeblo mm SI O Gai EI I m EI LS JI
55. time is set to 180 minutes by default You can set the parameter for the tripping time to between 2 minutes and 1 440 minutes Tolerance The tolerance indicates how much the string current is allowed to deviate from the mean value If the string current is outside the tolerance limits the data logger detects the deviation and stores it The tolerance can be set between 1094 and 100 Grouping the Strings To simplify monitoring you can assign the strings to the eight measuring channels Should individual strings be shaded aligned differently or fitted with different PV modules it is also possible to group the individual measuring channels This makes it possible to compare measuring channels with the same properties Comparison Every five minutes the data logger compares the string current with the mean value for the group If the string current exceeds the tolerance limit the data logger records the deviation If at the next query there is still a deviation between the string current and the mean value the deviations are added together If the sum of the deviations exceeds the error sum the data logger issues the warning 380 SMU When the error is acknowledged the error sum is reset and the warning disappears from the display It is possible to see which Sunny String Monitor and which measuring channels deviate from the mean value of the group via the Sunny Central Control or via the SC COM Example It is assumed that at time
56. tning surge current 10 350 total C2 nominal discharge current 8 20 total Test standards Installation Manual BLITZDUCTOR BVT ALD 60 Type IP 60 Voc 5 kA 20 kA IEC 61643 21 EN 61643 21 SSMxx 2 1 IA BS JP en 20 53 12 Technical Data SMA Solar Technologv AG Surge Arrester Module for Communication and Voltage Supply in SSMxx 21 BS JP Type Arrester class Nominal voltage D1 Lightning surge current 10 350 total C2 nominal discharge current 8 20 total Test standards Surge Arrester for DC Main Cable in SSMxx 21 BS JP Type Maximum PV voltage Total discharge current 8 20 Nominal discharge current 8 20 per terminal Surge Arrester for DC Main Cable in SSMxx 21 BS Type Nominal voltage Maximum discharge current 8 20 per terminal Nominal discharge current 8 20 per terminal Connection of Communication and Voltage Supply Terminal Conductor cross section Cable gland Sealing range of cable gland Recommended cable type Degree of Protection and Ambient Conditions Degree of protection Pollution degree Operating range Storage temperature Relative humidity Maximum altitude above MSL Ambient conditions as per DIN EN 60529 condensation possible as per IEC 60721 3 4 1995 54 SSMxx 2 1 IA BS JP en 20 BLITZDUCTOR BXTML2 BD DL S 15 Type IP 15 Vpc 9 kA 20 kA IEC 61643 21 EN 61643 21 DEHNguard DG M YPV SCI 1000 FM 1 000 Vpc 40 kA 12 5 kA CITEL DSSOVGPVS
57. to the mean value of a group is 5 A The set tolerance is 10 This means that the tolerance range is from 4 5 A to 5 5 A The tripping time is set to 1O minutes The query interval is five minutes The error sum can therefore be calculated as follows Error sum _10 min 1075 O min 10 20 5 min All string currents are compared with this mean value at the five minute query interval If all the string currents are within the set tolerance of 10 no addition is carried out However if one string has a string current of 6 A the difference between the actual string current of 6 A and the tolerance limit of 5 5 A is added The difference is 0 5 A which is a deviation of 10 from the mean value This difference of 10 is now added to the total until the error sum of 20 is reached The error sum is reached when the error remains the same for two query intervals The data logger issues the warning 380 SMU Installation Manual SSMxx 2 1 1A BS JP en 20 13 4 Product Description SMA Solar Technology AG Error sum A The error sum is reached E for this string current value l wng and Sunny Central Control displays the warning SMU 5 iS Deviations from the mean value the deviations are summed until the error sum is reached 2515 75 10125 115 t min EI C C 3 Polling interval B 2 Polling interval A 1 Polling interval 25 5 75 10 125 15 t min If a string fails the current
58. tor to the wall or stand using suitable screws and washers 6 Ensure that the Sunnv String Monitor is securelv in place 5 2 Base Mounting The base for the Sunny String Monitor is available as an accessory 5 2 1 Selecting the Mounting Location A DANGER Danger to life due to fire or explosion Do not mount the Sunny String Monitor on flammable construction materials Do not mount the Sunny String Monitor near highly flammable materials Do not mount the Sunny String Monitor in potentially explosive atmospheres Requirements for the mounting location LI The mounting location must not be in a living or office area LI The mounting location must not block any escape routes LI The mounting location must be freely and safely accessible at all times without the necessity for any auxiliary equipment such as scaffolding or lifting platforms Non fulfillment of these criteria may restrict servicing LI The mounting location must be suitable for the weight and dimensions of the Sunny String Monitor see Section 12 Technical Data page 51 LI The mounting location must not be exposed to direct solar irradiation 5 2 2 Mounting the Base NOTICE Damage to the Sunny String Monitor due to moisture penetration Penetrating moisture can lead to condensation corrosion and creeping cur
59. trical Connection 6 3 Overview of the Connection Area 6 3 1 SSM8 21 BS SSM16 21 BS The features of the Sunny String Monitor are dependent on the order option The maximum configuration of the Sunny String Monitor is shown in the overview diagrams e e e a f olo a o ol Jo i O_O 23 EH ol do o cW l Al B RA ill ol B ca Q ORO B II REN N ni o aer e oMIN oll BB am d al l jo d al Bl on O oo ME e REN o La B MN A B A C Figure 10 Connections with SSM16 21 BS as an example Position Designation Terminals for string cables positive terminal Terminal for data cables Terminal for DC main cable positive terminal Terminal for grounding cable Terminal for DC main cable negative terminal nimi OJOJ gt Terminals for string cables negative terminal I
60. tring Monitor Units e Sunny String Monitor SSM24 21 3 String Monitor Units Procedure To connect the data cables in the Sunny String Monitor carry out the following steps in the given sequence The exact procedure is described in the following sections Preparing the data cables Connecting the data cables to the connectors Connecting the connectors in the Sunny String Monitor 34 SSMxx 2 1 IA BS JP en 20 Installation Manual SMA Solar Technologv AG 6 Electrical Connection Preparing the Data Cables Requirement LI The data cables must be routed into the Sunnv String Monitor through cable glands see Section 6 2 page 23 Additionally required mounting material not included in the scope of delivery L Conductive adhesive foil Procedure 1 Dismantle the data cables by 100 mm 2 Fold the surplus cable shield of the data cables back over the cable sheath 3 Wrap the cable shield in conductive adhesive foil Connecting the Data Cables to the Connectors Pin assignment in the connector lil Voltage supply to the Sunny String Monitors To minimize voltage drops between the separate Sunny String Monitors one insulated conductor pair must be assigned to each of the pins for voltage supply Pin Assignment GND EXT 2 RS485L 3 RS485H 4 60V_EXT Procedure 1 Strip off the insulated conductors of the data cables by 10 mm 2 Remove the connectors from the customer terminals X712 and X7
61. ure that no voltage is present Ground and short circuit the device Cover or isolate any adjacent live components Protective covers must always be mounted Danger to life from electric shock due to live DC cables DC cables connected to PV modules that are exposed to sunlight are live Touching live DC cables results in death or serious injury due to electric shock Prior to connecting the DC cables ensure that the DC cables are voltage free Wear suitable personal protective equipment when working on the Sunny String Monitor Danger to life from electric shock due to ground fault In the event of a ground fault grounded PV systems can still be live Touching system components that have not been properly grounded results in death or serious injuries from electric shock Before working on the PV system ensure that no ground fault is present Wear suitable personal protective equipment for all work on the product Danger to life from electric shock if the Sunny String Monitor is damaged If the Sunny String Monitor is damaged dangerous situations may arise during operation that result in death or serious injury from electric shock e Only use the Sunny String Monitor when it is in a technically faultless condition and safe to operate e Regularly check the Sunny String Monitor for visual damage e Make sure that all external safety equipment is freely accessible at all times Make sure that all safety equipment is in
62. use holders in the Sunny String Monitor when the power is switched off Ensure that the device cannot be reconnected Ensure that no voltage is present Ground and short circuit the device Cover or isolate any adjacent live components Protective covers must always be mounted 6 2 Inserting the Cables into the Switch Cabinet D E F E G B A Figure 9 Bottom view of Sunny String Monitor with cable glands example Position Designation Explanation A Condensate drain B Cable feed through plate For connecting the string cables C Cable gland with sealing ring cut outs For connecting the data cables D Sealing plug Reserve E Cable gland with sealing ring cut outs For connecting the DC main cables F Cable gland with sealing ring cut outs For connecting the grounding cable G Sealing plug Reserve Leading Cables through the Cable Feed Through Plate SMA Solar Technologv AG recommends the use of supplementarv strain relief for the string cables Installation Manual SSMxx 2 1 1A BS JP en 20 23 6 Electrical Connection SMA Solar Technologv AG NOTICE Damage to the Sunny String Monitor due to moisture penetration Moisture can penetrate the Sunny String Monitor through redundant holes in the membranes of the cable feed through plate Only pierce as many holes in the membrane as you need for the cables Procedure 1 Pierce the appropriate membranes 2 Insert the string cables through the membrane

Installation Manual - SUNNY STRING-MONITOR SSM8-21

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