SMA CONNECTION UNIT 600-US / 1000-US
Contents
1. 2 Sale sonia Ze iniendetU araba ao aE E S Re Tt 2 2 Skillsot QualifieaPersonsr sirio eng 2 3 Sie PIECGUIONS lieto tralci 3 Scope of Delivery Lecci Product Description ccc cece cece cece cence eens Ae ConneciotUniarei ze earn 42 Type label scippo db tes aperire 13 DC Switch Disconnector sarah takeae Az SWING USES agraria 4 5 Reverse Polarity Detection 5S MOUuningisica nia beni leali 5 1 Requirements for Mounting 0 0 0 c eee cece eee eee 5 2 Mounting the Connection Unit ona Wall 5 3 Mounting the Connection Unit to a Post 0 0 0c cee 6 Electrical Connection ccc ccc Lit 6 1 Safety during Electrical Connection LL 6 2 Overview of the Connection Area 6 2 1 Enclosure Openings isso eil e ia aa 6 2 2 Interior View of the Connection Unit 600 US 6 2 3 Interior View Connection Unit 1000 US 6 3 Connecting Conduits to the Connection Unit 6 4 Connecting the Grounding Conductor 6 5 Connecting the PV Array to the Connection Unit 600 US 6 6 Connecting the PV Array to the Connection Unit 1000 US 6 7 Operating the Reverse Polarity Detection 6 8 Connecting the DC Output Cable for the Inverter to the Conneccion Wilkin visse been ae Poet teas Installation Manual CU600 1000US IA en 10 Table of Contents SMA America LLC 7 GOMMISSIONING 243 045 6260 pete l2. Accessories for PV Inverters SMA CONNECTION UNIT 600 US 1000 US Installation Manual CU600 1000US IA en 10 IMEN CU US Version 1 0 Coa Cus SMA America LLC Legal Provisions Legal Provisions Copyright 2013 SMA America LLC All rights reserved No part of this document may be reproduced stored in a retrieval system or transmitted in any form or by any means electronic mechanical photographic magnetic or otherwise without the prior written permission of SMA America LLC Neither SMA America LLC nor SMA Solar Technology Canada Inc makes representations express or implied with respect to this documentation or any of the equipment and or software it may describe including with no limitation any implied warranties of utility merchantability or fitness for any particular purpose All such warranties are expressly disclaimed Neither SMA America LLC nor its distributors or dealers nor SMA Solar Technology Canada Inc nor its distributors or dealers shall be liable for any indirect incidental or consequential damages under any circumstances The exclusion of implied warranties may not apply in all cases under some statutes and thus the above exclusion may not apply Specifications are subject to change without notice Every attempt has been made to make this document complete accurate and up to date Readers are cautioned however that SMA America LLC and SMA Solar Technology Canada Inc reserve the ri
3. There might be ice on the seal of the lid when there is frost or the temperatures are below freezing Remove it prior to opening the Connection Unit e g by melting the ice with warm air Adhere to the corresponding safety precautions Damage to the Connection Unit due to moisture ingress during electrical installation Do not open the Connection Unit in the event of rain or a high level of humidity gt 95 For attaching the conduits to the enclosure only use UL listed rainproof or wet location conduit fittings in accordance with UL514B Close all unused openings tightly Electrostatic discharge By touching electronic components you can damage or destroy the Connection Unit through electrostatic discharge e Ground yourself before touching any components Ground faults unreliable and highly resistive connections due to Wire Nuts Potential damage to or failure of the Connection Unit Do not use Wire Nuts 26 CU600 1000US lA en 10 Installation Manual SMA America LLC 6 Electrical Connection i Electrical installations All electrical installations must be made in accordance with the local electrical standards and the National Electrical Code ANSI NFPA70 or the Canadian Electrical Code CSA C22 1 e Use only 194 F 90 C copper wire for all DC wiring connections to the screw terminals between the PV modules and the Connection Unit and between the Connection Unit and the inverter e The DC input and output
4. e Make sure that all devices e g inverter connected to the Connection Unit are switched off and protected against reconnection see manual of the respective device e Cover the PV modules 2 Turn the DC switch disconnector of the Connection Unit counterclockwise by 90 and set to OFF 3 Disassemble the lid of the Connection Unit Loosen all captive screws with an Allen key AF 4 and remove the lid by lifting it from below 4 Open all safety levers all the way 5 RIN Danger to life due to electric shock The DC cables are still live if there is sufficient irradiation Detaching the live DC cables from the terminals can cause life threatening electric shocks e Ensure that the terminals are voltage free using a suitable multimeter 6 Detach all DC cables from the terminals using a screwdriver Installation Manual CU600 1000US IA en 10 43 9 Troubleshooting SMA America LLC 9 Troubleshooting 9 1 LED Signals The LEDs are part of the reverse polarity detection of the Connection Unit 1000 US and signalize if a string has been connected correctly or with the wrong polarity A B G a Res Ra 59 ISIS Figure 13 LED signals of the reverse polarity detection for the SMA Connection Unit 1000 US Explanation A LED INPUT A glowing red String at INPUT A is connected with the wrong polarity LED middle glowing green String at INPUT A and or INPUT B is connected correctly
5. provided opening of the DC switch disconnector e Attach all screws of the lid torque 35 4 in lb 4 Nm Detach the screws from the mounting straps 5 Remove the Connection Unit from the building ground 6 To seal the Connection Unit insert the original filler plugs or type 3R filler plugs into the enclosure openings 10 2 Packing the Connection Unit e Pack the Connection Unit Use the original packaging or packaging that is suitable for the weight and dimensions of the Connection Unit 10 3 Disposing of the Connection Unit e Dispose of the Connection Unit in accordance with the applicable local disposal regulations for electronic waste Installation Manual CU600 1000US IA en 10 47 11 Technical Data SMA America LLC 11 Technical Data DC Input Maximum input voltage 600 V 1 000 V DC Output Protective Devices po eusoousio cu 1000 05 10 DC reverse polarity detection Not available Torques Po usoousio cutooousio Fuse holder terminals for connecting the DC 30 in lb 3 4 Nm 15 in lb 1 7 Nm input cables Terminals for connecting the DC output cables 51 in lb 5 8 Nm 51 in lb 5 8 Nm 51 inb 5 8 Nm _ __51 indb 5 8 Nr 35 4 inlb 4 0 Nm 35 4 inl E 48 CU600 1000US IA en 10 Installation Manual SMA America LLC 11 Technical Data General Data Width x height x depth 18 294 in x 15 11 16 in x 5 112 in 466 mm x 398 mm x 136 mm 22 10a Length x width x heig
6. C LED INPUT B glowing red String at INPUT B is connected with the wrong polarity 44 CU600 1000US lA en 10 Installation Manual SMA America LLC 9 Troubleshooting 9 2 Replacing the String Fuses Each string fuse is assigned to one string If one or several string fuses are blown or defective you have to replace the respective string fuses Requirements O Only ULlisted string fuses according to UL 2579 are permitted L1 600 V string fuses must be inserted for the Connection Unit 600 US LD 1 000 V string fuses must be inserted for the Connection Unit 1000 US LI The fuse size must be 10 mm x 38 mm midget format O Only maximum 20 A string fuses are permitted Procedure Danger to life due to electric shock e Make sure that all devices e g inverter connected to the Connection Unit are switched off and protected against reconnection see manual of the respective device e Ensure that no DC voltage is present 2 Turn the DC switch disconnector OFF Turn the DC switch disconnector counterclockwise by 90 3 Remove the lid of the Connection Unit Loosen alll captive screws with an Allen key AF 4 and remove the lid by lifting it from below 4 Open all safety levers needed all the way Installation Manual CU600 1000US IA en 10 45 SMA America LLC 9 Troubleshooting Y BT PT W A E gt N is j Tighten all screws of the lid with an Allen Key AF 4 t
7. Connection Unit must be dismantled Procedure 1 RSA Danger to life due to electric shock e Make sure all devices connected to the Connection Unit e g inverter are switched off and protected against reconnection see manual of the respective device e Ensure that no DC voltage is present Lead the grounding conductors trough the conduit into the interior of the Connection Unit Strip the insulation of the grounding conductor 25 3 in 18 mm Connect the grounding conductor to one of the termination points of the terminal with the symbol and tighten with a screwdriver blade width 6 mm torque at least 44 3 in lb 5 Nm 5 Ensure that the grounding conductor is firmly positioned 32 CU600 1000US lA en 10 Installation Manual SMA America LLC 6 Electrical Connection 6 5 Connecting the PV Array to the Connection Unit 600 US Cable requirements O The DC cables of the PV array must be designed in accordance with the installation requirements applicable on site and for temperatures of 194 F 90 C LD The DC input and output circuits are isolated from the enclosure and that system grounding if required by Section 250 of the National Electrical Code ANSI NFPA 70 is the responsibility of the installer DL The maximum cable length which is dependent on the conductor cross section must be adhered to DL Cable type copper wire L Conductor cross section AWG 12 to AWG 8 4 mm to 8 mm
8. SMA America LLC 7 2 Commissioning the Connection Unit The Connection Unit is part of the PV system All parts of the PV system must be mounted and set up prior to commissioning the Connection Unit Commissioning occurs via the three pole circuit breaker see inverter installation manual Requirements DL The Connection Unit must be correctly mounted O All DC cables must be correctly connected C String fuses must be inserted in the Connection Unit C Unused output openings on top of the Connection Unit must be closed with UL listed type 3R filler plugs C Unused input openings of the Connection Unit must be closed tightly The factory mounted filler plugs can be used for that purpose L Connection Unit must be connected to the inverter DL The Connection Unit and the inverter must be connected by a grounding conductor LD The lid of the Connection Unit must be installed DL The three pole circuit breaker must be correctly rated Procedure 1 Commission the inverter see inverter installation manual 2 If the DC switch disconnector has been protected against restarting open and detach the padlock 3 Turn the DC switch disconnector of the Connection Unit counterclockwise by 90 and set to ON 42 CU600 1000US IA en 10 Installation Manual SMA America LLC 8 Disconnecting the Connection Unit from Voltage Sources 8 Disconnecting the Connection Unit from Voltage Sources 1 RUN Danger to life due to electric shock
9. circuits are isolated from the enclosure and that system grounding if required by Section 250 of the National Electrical Code ANSI NFPA 70 is the responsibility of the installer e Make sure that no damaged cables are being used 6 2 Overview of the Connection Area 6 2 1 Enclosure Openings A 4 A D U lt A E 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 A N G gt I lt a gt 7 NI o B Figure 9 Enclosure openings of the Connection Unit Litem Designation A Output opening in the enclosure for connecting the conduits diameter lha in 34 5 mm to 6 in 34 7 mm Input opening in the enclosure with filler plugs for connecting the conduits diameter E in 27 8 mm to Vag in 28 0 mm Installation Manual CU600 1000US IA en 10 27 6 Electrical Connection SMA America LLC 6 2 2 Interior View of the Connection Unit 600 US b gt G F E D Figure 10 Components and connection areas in the interior of the Connection Unit 600 US x he CT fe ennio for conecng he DC ongu cole NUT Fuse holders for string fuses and terminals for connecting the negati
10. components you can damage or destroy the Connection Unit through electrostatic discharge e Ground yourself before touching any components 12 CU600 1000US IA en 10 Installation Manual SMA America LLC 3 Scope of Delivery 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 A B DD de lel Figure 2 Components included in the scope of delivery item Quantity Bio Installation manual Production Test Report Installation Manual CU600 1000US IA en 10 13 A Product Description SMA America LLC 4 Product Description 4 1 Connection Unit The Connection Unit is a String Combiner to which up to eight strings can be connected N BA gt A B e NW B al C Figure 3 Design of the Connection Unit Item Designation DC switch disconnector Bo Captive screws of the lid Type label In the Connection Unit the PV array strings are combined and routed into the inverter via cables The integrated fuse holders are designed to be used with string fuses for overcurrent protection The Connection Unit is equipped with a DC switch disconnector and therefore serves as a DC disconnection unit Symbols on the Connection Unit Symbol Equipment grounding No galvanic isolation 14 CU600 1000US IA en 10 Installation Manual SMA America LLC A Product D
11. in lb 5 8 Nm 7 Mount the lid of the Connection Unit e Position the lid in such a way that the protruding shaft in the Connection Unit snaps into the provided opening of the DC switch disconnector Tighten all lid screws with an Allen key AF 4 torque 35 in lb 4 Nm 8 In order to protect the DC switch disconnector against restarting lead the shackle of the padlock through the opening in the switch and lock it 9 Lead the connected DC output cables through the conduit of the Connection Unit and connect to the inverter see inverter installation manual Installation Manual CU600 1000US IA en 10 39 7 Commissioning SMA America LLC 7 Commissioning 7 1 Inserting the String Fuses Insert the string fuses before commissioning the Connection Unit Requirements O Only ULlisted string fuses according to UL 2579 are permitted L1 600 V string fuses must be inserted for the Connection Unit 600 US LD 1 000 V string fuses must be inserted for the Connection Unit 1000 US L The fuse size must be 10 mm x 38 mm midget format O Only maximum 20 A string fuses are permitted Procedure 1 A DANGER Danger to life due to electric shock e Make sure that all devices e g inverter connected to the Connection Unit are switched off and protected against reconnection see manual of the respective device e Ensure that no DC voltage is present 2 Turn the DC switch disconnector OFF Turn the DC sw
12. when pressing out the filler plugs e Toconnect the conduits to the input openings of the Connection Unit gently press out one filler plug for each conduit from the inside with a blunt object e g screwdriver handle Make sure not to damage components of the Connection Unit or of the filler plugs Insert one conduit fitting each into the corresponding enclosure opening and tighten from within using the counter nut Attach the conduit to the enclosure opening Close an unused output opening on top of the Connection Unit with ULlisted type 3R filler plugs Close unused input openings of the Connection Unit with the factory mounted filler plugs 6 4 Connecting the Grounding Conductor The Connection Unit is equipped with two terminals for connecting the grounding conductors Each terminal has two connection points Overview Figure 12 Terminals for connecting the grounding conductors Cable requirements O O The cable must be designed in accordance with the local installation requirements and for temperatures of over 194 F 90 C Cable type copper wire Use only solid wire or rough wire strands Conductor cross section AWG 8 to AWG 2 10 mm to 35 mm Installation Manual CU600 1000US IA en 10 31 6 Electrical Connection SMA America LLC Requirements LI All conduits must be correctly connected to the Connection Unit see Section 6 3 O The DC switch disconnector must be turned OFF and the lid of the
13. 877 MY SMATech 1 877 697 6283 Estados Rocklin CA 1916 625 0870 Unidos Canada SMA Canada Inc 1 877 MY SMATech 1 877 697 6283 Canad Toronto toll free for USA Canada and Puerto Rico Llamada gratuita en EE UU Canad y Puerto Rico xk international Internacional toll free for Canada gratuit pour le Canada Installation Manual CU600 1000US IA en 10 5 SMA Solar Technology SMA America LLC www SMA America com
14. Requirements DL The conduits must be correctly connected to the Connection Unit see Section 6 3 L The DC switch disconnector must be switched OFF and the lid must be dismantled Procedure Connect the DC cables of the PV array to each INPUT A and INPUT B as follows 1 A DANGER Danger to life due to electric shock e Make sure that all devices e g inverter connected to the Connection Unit are switched off and protected against reconnection see manual of the respective device e Cover the PV modules 2 WINNT Danger to life due to electric shock The strings in the Connection Unit are combined to one main string If there is reverse polarity of a PV string there can be short circuit current flowing when string fuses are inserted string safety levers are closed and the DC switch disconnector is open e Open all safety levers all the way 3 Lead the DC cables of the PV array through the connected conduits into the interior of the Connection Unit 4 Strip the insulation of all cables aY in 9 mm Installation Manual CU600 1000US IA en 10 33 6 Electrical Connection SMA America LLC 34 Check the positive DC cables for correct polarity and insert them all the way into the square opening with the plus sign on the bottom of the fuse holder Tighten the fuse holder screws with a Philips screwdriver Philips size 2 torque 30 in lb 3 4 Nm Check the negative DC cables for correct polarity and
15. T A Installation Manual CU600 1000US IA en 10 29 6 Electrical Connection SMA America LLC 6 3 Connecting Conduits to the Connection Unit Additionally required material not included in the scope of delivery L1 Conduits made out of metal that match the openings of the Connection Unit O Ullisted rainproof or wet location conduit fittings complying with UL514B that match the openings of the Connection Unit LI UlLlisted type 3R filler plugs for closing unused output openings in the enclosure at the top of the Connection Unit Procedure 1 A DANGER Danger to life due to electric shock e Make sure that all devices e g inverter connected to the Connection Unit are switched off and protected against reconnection see manual of the respective device 2 NOTICE Damage to the Connection Unit due to moisture ingress Electronic components in the Connection Unit can be destroyed or damaged as a result of moisture ingress e Do not enlarge enclosure openings 3 Switch the DC switch disconnector OFF Turn the DC switch disconnector counterclockwise by 90 4 Disassemble the lid of the Connection Unit Loosen all captive screws with an Allen key AF 4 and remove the lid by lifting it from below 5 Remove the adhesive tape from both output openings on top of the Connection Unit 30 CU600 1000US lA en 10 Installation Manual SMA America LLC 6 Electrical Connection 6 10 Risk of injury
16. ables and other supply lines are damaged by drilling e Before drilling ensure that there are no electric cables and supply lines in the wall that could be damaged 3 Mark the drill hole positions by means of the oblong holes in the brackets of the Connection Unit Use at least one of the oblong holes at the top and at the bottom Remove the Connection Unit from the wall 5 Drill holes at the markings Insert suitable screw anchors into the drill holes Installation Manual CU600 1000US IA en 10 23 5 Mounting SMA America LLC 7 Insert screws with washers through the oblong holes of the Connection Unit into the drill holes 8 Tighten the screws Ensure that no screws are loose 9 Ensure that the Connection Unit is firmly positioned 24 CU600 1000US IA en 10 Installation Manual SMA America LLC 5 Mounting 5 3 Mounting the Connection Unit to a Post NOTICE Damage to the Connection Unit due to moisture and dust intrusion Dust or moisture intrusion can damage the Connection Unit e Only mount the Connection Unit with its lid closed and with inserted filler plugs Additionally required mounting material not included in the scope of delivery DL 2 screws suitable for the building ground LJ 2 washers to match the screws CL 2 screw anchors suitable for the building ground and the screws Procedure 1 Position the Connection Unit on the post 2 Mark the drill hole positions by means of the oblong hole
17. ation should 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 The mounting location should not be exposed to direct solar irradiation Direct solar irradiation can cause the Connection Unit to overheat The ambient temperature must be within a permissible range see Section 11 Technical Data page 48 This will ensure optimal operation of the Connection Unit CU600 1000US lA en 10 Installation Manual SMA America LLC Dimensions for mounting 18 in 466 mm 25 in 32 20 mm 16 in 407 mm 15 in 398 mm 25 ag iN 20 mm Figure 6 Dimensions of the mounting points Installation Manual 5 Mounting CU600 1000US IA en 1 0 19 5 Mounting SMA America LLC i Information on mounting the Connection Unit below a Sunny Tripower e You can mount the Connection Unit directly below the Sunny Tripower The output openings of the Connection Unit must be exactly below the openings for the DC connection of the Sunny Tripower e Align the oblong holes of the mounting straps of the Connection Unit the oblong holes of the wall mounting brackets of the Sunny Tripower and the drill holes for the screw in the rear panel of the Sunny Tripower to each other e In order to have the conduits at the Sunny Tripower and at the Connection Unit corre
18. ction Unit Figure 8 Permitted and prohibited mounting positions 22 CU600 1000US IA en 10 Installation Manual SMA America LLC 5 Mounting 5 2 Mounting the Connection Unit on a Wall NOTICE Damage to the Connection Unit due to moisture and dust intrusion Dust or moisture intrusion can damage the Connection Unit e Only mount the Connection Unit with its lid closed and with inserted filler plugs Additionally required mounting material not included in the scope of delivery O Atleast two screws that are suitable for the foundation O Atleast two washers that are suitable for the screws O Atleast two screw anchors that are suitable for the foundation and for the screws A CAUTION Risk of burns due to hot enclosure parts Some parts of the enclosure can get hot during operation e Mount the Connection Unit in such a way that it cannot be touched inadvertently Risk of injury when lifting the Connection Unit or if it is dropped There is a risk of injury if the Connection Unit is lifted incorrectly or dropped during transport or mounting e Keep in mind that the Connection Unit weighs 22 lbs 10 kg when mounting it e Use suitable mounting material for the mounting location of the Connection Unit Do not use hollow wall anchors or toggle bolts for mounting on drywall Procedure 1 Position the Connection Unit on the wall 2 DWN Ne Danger of electric shock if electric c
19. ctly positioned the left oblong hole of the wall mounting bracket of the Sunny Tripower and the left oblong hole of the Connection Unit must be flush one below the other Example 20 in 529 mm y A ON gi y 20 CU600 1000US IA en 10 Installation Manual SMA America LLC 5 Mounting Recommended clearances O Observe recommended clearances to the walls or other objects Thus you can read the following data from the type label at all times DL The clearances to the front must be chosen in such a way that the DC switch disconnector is accessible at all times Thus you can operate the DC switch disconnector anytime and read out the switch position NOTICE Damage to the Connection Unit by mounting it in regions with a high probability of snow Position the Connection Unit in such way that it will not be covered entirely with snow when mounting it in regions with a high probability of snow drifts Snow drifts can damage the seals of the conduits and moisture can get into the Connection Unit e To protect the Connection Unit from freezing provide sufficient clearance to the ground 30 in 766 mm ay ace 300 mm Figure 7 Recommended clearances Installation Manual CU600 1000US IA en 10 21 5 Mounting SMA America LLC Permitted mounting positions L The Connection Unit must be mounted in a permitted position That prevents moisture from entering the Conne
20. d against reconnection see manual of the respective device e Cover the PV modules 2 WINE Danger to life due to electric shock The strings in the Connection Unit are combined to one main string If there is reverse polarity of a PV string there can be short circuit current flowing when string fuses are inserted string safety levers are closed and the DC switch disconnector is open e Open all safety levers all the way 3 Lead the DC cables of the PV array through the connected conduits into the interior of the Connection Unit Installation Manual CU600 1000US IA en 10 35 6 Electrical Connection SMA America LLC Strip the insulation of all cables by 3 in 10 mm 5 Check the positive DC cables for correct polarity and connect them to the terminals with the plus sign Tip the reverse polarity detection can be carried out after connecting each string see Section 6 7 Operating the Reverse Polarity Detection page 36 6 Tighten the screw terminals with a screwdriver blade width 4 torque 15 in lb 1 7 Nm 7 Check the negative DC cables for correct polarity and connect them to the terminals with the minus sign Tip the reverse polarity detection can be carried out after connecting each string see Section 6 7 Operating the Reverse Polarity Detection page 36 8 Tighten the screw terminals with a screwdriver blade width 4 torque 15 in lb 1 7 Nm 9 Ensure tha
21. escription 4 2 Type Label The type label clearly identifies the Connection Unit The type label is located on the right hand side of the enclosure You will find the following information on the type label e Device type Item No e Serial number Serial No e Date of manufacture e Device specific characteristics You will require the information on the type label to use the Connection Unit safely and when seeking customer support from the SMA Service Line The type label must be permanently attached to the Connection Unit Symbols on the Type Label Symbol 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 from hot surfaces The product can get hot during operation Avoid contact during operation Allow the product to cool down sufficiently before carrying out any work Wear personal protective equipment such as safety gloves Observe the documentation Observe all documentation that is supplied with the product UL certification mark c us LISTED UL 741 is the standard applied by Underwriters Laboratories to the product to certify that it meets the requirements of the National Electrical Code the Canadian Electrical Code CSA C22 1 and IEEE 929 2000 IEEE 929 2000 provides recommendations regarding the proper equipment and functionality necessary to ensure compatible operation when power generation is c
22. f the product may cause a fire Observe the operating instructions Read the documentation of the product before working on it Follow all safety precautions and instructions as described in the documentation Installation Manual CU600 1000US IA en 10 5 General Warnings SMA America LLC General Warnings A WARNING All electrical installations must be made in accordance with the local and National Electrical Code ANSI NFPA 70 or the Canadian Electrical Code CSA C22 1 This document does not and is not intended to replace any local state provincial federal or national laws regulation or codes applicable to the installation and use of the product including without limitation applicable electrical safety codes All installations must conform with the laws regulations codes and standards applicable in the jurisdiction of installation SMA assumes no responsibility for the compliance or noncompliance with such laws or codes in connection with the installation of the product The product contains no user serviceable parts For all repair and maintenance always return the unit to an authorized SMA Service Center Before installing or using the product read all of the instructions cautions and warnings in this manual Wiring of the product must be made by qualified personnel only 6 CU600 1000US lA en 10 Installation Manual SMA America LLC Table of Contents Table of Contents Information on this Document
23. fic topic or goal but is not safety relevant Indicates an essential requirement for achieving a specific goal Pe A problem that could occur Nomenclature Complete designation Designation in this document SMA Connection Unit 600 US 1000 US Connection Unit product Installation Manual CU600 1000US IA en 10 9 2 Safety SMA America LLC 2 Safety 2 1 Intended Use The Connection Unit is a String Combiner to which up to eight strings can be connected C D E Figure 1 Example design of a PV system with Connection Unit Designation PV modules Connection Unit Sunny Tripower Circuit breaker Utility grid The Connection Unit is suitable for indoor and outdoor use The Connection Unit must only be used in ungrounded PV systems Do not use grounded PV modules with the Connection Unit Only ground the mounting frame of the PV modules All DC inputs of an ungrounded PV system must be equipped with an overcurrent protection according to the National Electrical Code NEC 690 The Connection Unit shall be installed per the requirements contained in Section690 35 of the National Electrical Code ANSI NFPA 70 The Connection Unit must only be used with the following transformerless SMA inverters e SB 6000TLUS 12 ZOOOTLUS 12 8000TLUS 12 9OOOTLUS 12 10000TLUS 12 11000TLUS 12 e STP 12000TLUS 10 15000TL US 10 20000TL US 10 24000TL US 10 For safety reasons it is forbidden to modify the product or
24. ght to make changes without notice and shall not be responsible for any damages including indirect incidental or consequential damages caused by reliance on the material presented including but not limited to omissions typographical errors arithmetical errors or listing errors in the content material All trademarks are recognized even if these are not marked separately Missing designations do not mean that a product or brand is not a registered trademark The Bluetooth word mark and logos are registered trademarks owned by Bluetooth SIG Inc and any use of such marks by SMA America LLC and SMA Solar Technology Canada Inc is under license SMA America LLC 3801 N Havana Street Denver CO 80239 U S A SMA Solar Technology Canada Inc 2425 Matheson Blvd E 7th Floor Mississauga ON LAW 5K4 Canada Installation Manual CU600 1000US IA en 10 3 IMPORTANT SAFETY INSTRUCTIONS SMA America LLC IMPORTANT SAFETY INSTRUCTIONS SAVE THESE INSTRUCTIONS This manual contains important instructions for the following products e CU 600 US 10 SMA Connection Unit 600 US e CU 1000 US 10 SMA Connection Unit 1000 US This manual must be followed during installation and maintenance The product is designed and tested according to international safety requirements but as with all electrical and electronic equipment certain precautions must be observed when installing and or operating the product To reduce the risk of personal inju
25. ht of packaging 22 ER nO Ha in 5 11 3 in 563 mm x 543 mm x 240 mm Transport weight 24 b 11 kg Operating temperature range 40 F to 140 F 40 C to 60 C Storage temperature range 40 F to 140 F 40 C to 60 C Maximum permissible value for relative humidity 100 non condensing Maximum operating altitude above MSL 6 561 ft 2 000 m Enclosure Type Rating Type 3R Approvals and national standards UL1741 as per 05 2013 CAN CSA C22 2 No 107 1 01 Installation Manual CU600 1000US IA en 10 49 12 Accessories SMA America LLC 12 Accessories You will find the corresponding accessories and spare parts for your product in the following overview If required these can be ordered from SMA or your specialty retailer Brief Description SMA order number String fuses Retrofit kit with ten fuses listed according to UL2579 50 CU600 1000US lA en 10 Installation Manual SMA America LLC 13 Contact 13 Contact If you have technical problems concerning our products contact the SMA Service Line We require the following information in order to provide you with the necessary assistance e Device type of the Connection Unit e Serial number of the Connection Unit e Type and number of the PV modules connected e Mounting location and mounting height of the Connection Unit e LED signal and error message of the inverter if applicable SMA Service Line United States SMA America LLC 1
26. insert them all the way into the square opening with the minus sign on the bottom of the fuse holder Tighten the fuse holder screws with a Philips screwdriver Philips size 2 torque 30 in lb 3 4 Nm Ensure that all conductors are securely in place and cannot be detached by pulling CU600 1000US lA en 10 Installation Manual SMA America LLC 6 Electrical Connection 6 6 Connecting the PV Array to the Connection Unit 1000 US Cable requirements O The DC cables of the PV array must be designed in accordance with the installation requirements applicable on site and for temperatures of 194 F 90 C LD The DC input and output circuits are isolated from the enclosure and that system grounding if required by Section 250 of the National Electrical Code ANSI NFPA 70 is the responsibility of the installer DL The maximum cable length which is dependent on the conductor cross section must be adhered to DL Cable type copper wire L Conductor cross section AWG 12 to AWG 6 4 mm to 16 mm Requirements DL The conduits must be correctly connected to the Connection Unit see Section 6 3 L The DC switch disconnector must be switched OFF and the lid must be dismantled Procedure Connect the DC cables of the PV array to INPUT A and B as follows 1 RUN Danger to life due to electric shock e Make sure that all devices e g inverter connected to the Connection Unit are switched off and protecte
27. install components that are not explicitly recommended for this product or distributed by SMA Use this product only in accordance with the enclosed documentation and with the local standards and directives Any other use can result in personal injury or property damage Do not mount the product in areas where flammable gases may occur Do not mount the product in areas where highly flammable materials are stored e Do not install the product in potentially explosive atmospheres 10 CU600 1000US lA en 10 Installation Manual SMA America LLC 2 Safety The enclosed documentation is an integral part of this product e Read and observe the documentation e Keep the documentation in a convenient place for future reference 2 2 Skills of Qualified Persons The tasks described in this document must be performed by qualified persons only Qualified persons must have the following skills e Knowledge of how electrical devices and plants work and are operated e Training in how to deal with the dangers and risks associated with installing and using electrical devices and plants e Training in the installation and commissioning of electrical devices and plants Knowledge of all applicable standards and directives Knowledge of and adherence to this document and all safety precautions Installation Manual CU600 1000US IA en 10 11 2 Safety SMA America LLC 2 3 Safety Precautions This section contains safety precautions that
28. it is 20 A 16 CU600 1000US lA en 10 Installation Manual SMA America LLC A Product Description The minimum size of the string fuses and cables is calculated by means of the short circuit current rating isc of the PV module The National Electrical Code stipulates that all string fuses and cables are designed to be at least 1 56 times as large as the I of the PV module being used The correct size of the string fuse is determined by calculating the minimum size and then rounding it up to the nearest standard size for string fuses Example calculating the minimum size of the string fuses For example if the I of the PV module equals 6 9 A then the size of the string fuses is determined as follows 1 56 x 6 9 10 76 The nearest standard size for string fuses would be a 12 A fuse 4 5 Reverse Polarity Detection The SMA Connection Unit 1000 US is equipped with reverse polarity detection B C war ee ee fo SA ojojojojojojojo e O D ele Figure 5 Reverse polarity detection in the SMA Connection Unit 1000 US litem Designation o LED for visualizing a polarity reversed string at INPUT A ie LED for visualizing a correct connection for INPUT A and INPUT B LED for visualizing a polarity reversed string at INPUT B i Button for activating the reverse polarity detection The reve
29. itch disconnector counterclockwise by 90 3 Remove the lid of the Connection Unit Loosen alll captive screws with an Allen key AF 4 and remove the lid by lifting it from below AO CU600 1000US lA en 10 Installation Manual SMA America LLC 7 Commissioning 4 Open all safety levers needed all the way fi WS I Sin A n i i CL DAT A PTL iS JN V oO Oo O a oO Ue 5 ne O O oO le Oo Vel e O Ve r Oo N 5 Am ff s THE Fav iY N N Sper 6 Close all safety levers all the way SFY thea ES vof Va TS Ti el kf O O 5 Q Q x Q oO gt Q Ho D Oo vu ta Vv gt L D Vv ih O 72 Vv i E 7 Mount the lid of the Connection Unit D 5 D E O Se o ni x O 3 o C Q D Ve O a Cc 0 D O e disconnector Vv lt Q 72 Q O c 72 O c Q gt e LE 0 990 c 2 5 E Ci O 3 E KL gt ae n a ue gt N Tighten all screws of the lid with an Allen Key AF 4 torque 35 in Ib 4 Nm In order to protect the DC switch disconnector against restarting lead the shackle of the padlock through the opening in the switch and lock it 8 9 Commission the Connection Unit see Section 7 2 41 CU600 1000US IA en 10 Installation Manual 7 Commissioning
30. la loin pese 40 7 1 Inserting the String Fuses teens 40 7 2 Commissioning the Connection Unit 42 8 Disconnecting the Connection Unit from Voltage Sources 43 Troubleshooting Lei 44 Gal ED Gis rara 44 9 2 Replacing the String FUSES sicis tai aida aa 45 10 De ommissioningigi cn viti ea 47 10 1 Disassembling the Connection Unit 47 10 2 Packing the Connection Unit 47 10 3 Disposing of the Connection Unit 47 lil Technical Dale grape 48 I2 Accessos tes a irks a heirs Sutton es ae aaa 50 MS COMPO parare alia 51 8 CU600 1000US lA en 10 Installation Manual SMA America LLC 1 Information on this Document 1 Information on this Document Validity This document is valid for the following device types e CU 600 US 10 SMA Connection Unit 600 US e CU 1000 US 10 SMA Connection Unit 1000 US Target Group This document is intended for qualified persons Only qualified personnel with the appropriate skills are allowed to perform the tasks described in this document see Section 2 2 Skills of Qualified Persons page 11 Additional Information Links to additional information can be found at www SMA Solar com Document title Document type Sunny Tripower 12000TL US 15000TL US 20000TL US Installation manual 24000TL US Sunny Boy 6000TLUS ZOOOTLUS 8000TLUS YOOOTLUS Installation manual 10000TLUS 11000TLUS Symbols symbol i Information that is important for a speci
31. must be observed at all times when working on or with the product To prevent personal injury or property damage and to ensure long term operation of the product read this section carefully and follow all safety precautions at all times A DANGER Danger to life due to high voltages in the Connection Unit High voltages that can cause fatal electric shocks when touched are present in the live components of the Connection Unit e All work on the Connection Unit must be carried out by qualified persons only e Before working on the Connection Unit carry out the following steps Switch off all devices that are connected to the Connection Unit e g inverter and protect against reconnection Cover the PV modules Turn the DC switch disconnector of the Connection Unit counterclockwise by 90 and set to OFF While operating the Connection Unit do not remove the sealing plugs All work on the Connection Unit should only be carried out as described in this document A WARNING Danger to life due to operating a damaged Connection Unit Using a damaged Connection Unit can lead to serious or lethal injuries through electric shock e Only operate the Connection Unit when it is functioning properly and safely e Regularly check the Connection Unit for visible damage e Ensure that all safety equipment is freely accessible at all times NOTICE Damage to the Connection Unit due to electrostatic discharges By touching electronic
32. olid wire or rough wire strands L Conductor cross section AWG 8 to AWG 2 10 mm to 35 mm Padlock requirements DL The material must be non corrosive and weather proof LD The shackle of the padlock must be hardened DL The lock cylinder must be secured Requirements DL The conduits must be correctly connected to the Connection Unit see Section 6 3 DL The DC switch disconnector must be switched OFF and the lid must be dismantled Procedure Connect the DC output cables for connecting the Connection Unit to the inverter for INPUT A and INPUT B as follows 1 E NNA Danger to life due to electric shock e Make sure all devices connected to the Connection Unit e g inverter are switched off and protected against reconnection see manual of the respective device e Cover the PV modules 2 Strip the insulation of the cable ends of the two cables for connecting the Connection Unit to the inverter by he in 18 mm 3 Connect a cable to the screw terminal with the 2 minus sign for connecting the Connection Unit to the 9 inverter pr 4 Tighten the screw terminals with a screwdriver blade width 6 mm torque 51 in lb 5 8 Nm 38 CU600 1000US lA en 10 Installation Manual SMA America LLC 6 Electrical Connection 5 Connect a cable to the screw terminal with the plus sign for connecting the Connection Unit to the inverter 6 Tighten the screw terminals with a screwdriver blade width 6 mm torque 51
33. onnected to the utility grid Installation Manual CU600 1000US IA en 10 15 A Product Description SMA America LLC 4 3 DC Switch Disconnector The Connection Unit is equipped with a DC switch disconnector The DC switch disconnector enables disconnection of the inverter from the PV array The disconnection takes place at all poles Figure 4 DC switch disconnector of the Connection Unit Item Designation Switch position ON Switch position OFF Opening for padlock to protect against restarting When the DC switch disconnector is switched OFF it can be protected against restarting with a padlock via one of the three openings 4 4 String Fuses String fuses are used to protect wiring and equipment from excessive currents that can cause damage heating or in extreme cases even fire If the string fuses are designed too small they may open too early and cause interference If the string fuses are designed too large they do not provide the required protection as they open too late In PV systems the minimum and maximum size of the string fuse is determined by the electrical nominal sizes of the PV module as well as by UL and National Electrical Code requirements Contact the manufacturer of the PV modules in order to obtain the corresponding nominal sizes of the string fuses The maximum nominal size for string fuses in the Connection Un
34. orque 35 in lb 4 Nm oO Q e Q O N i D c Re O oO c c O O oO O as Ve provided opening of the DC switch disconnector D oO tu D 3 E me O O ne x O 0 0 2 F 72 He premi n ome C O O D g D gt D Q gt v o 2 I a O A O Vv ul D Da D oO O t Be Cc 3 oO 3 D O Cc c o O S O A O t 2 v O O Q O X Q gt ne Oo D O Te p ee Vv gt oO D g D e O _ lt N 2 DI 8 Mounting the lid of the Connection Unit 7 Close all safety levers all the way 5 Installation Manual 9 Commission the Connection Unit see Section 7 2 CU600 1000US IA en 10 46 SMA America LLC 10 Decommissioning 10 Decommissioning 10 1 Disassembling the Connection Unit 1 Disconnect the PV system from voltage sources see inverter installation manual 2 Remove all cables from the Connection Unit e Disconnect the Connection Unit from voltage sources see Section 8 e Release all cables from the terminals using a screwdriver and pull the cables out of the Connection Unit e Unscrew the counter nut of the conduit fittings from the inside e Remove the conduit fittings and conduits with cables 3 Mount the lid of the Connection Unit e Position the lid in such a way that the protruding shaft in the Connection Unit snaps into the
35. rse polarity detection will test if the polarity of the connected conductors is correct once a string has been newly connected Testing occurs by operating the integrated button As long as there is sufficient DC voltage the test result is visualized by the LEDs flashing Installation Manual CU600 1000US IA en 10 17 5 Mounting SMA America LLC 5 Mounting 5 1 Requirements for Mounting Requirements for the mounting location A WARNING Danger to life due to fire or explosion Despite careful construction electrical devices can cause fires Do not mount the Connection Unit in areas where flammable gases may occur e Do not mount the Connection Unit near highly flammable materials e Do not mount the Connection Unit in potentially explosive atmospheres A CAUTION Risk of burns due to hot enclosure parts Some parts of the enclosure can get hot during operation e Mount the Connection Unit in such a way that it cannot be touched inadvertently A solid building ground is required for installation e g a concrete wall brick work a post Studs must be present behind the mounting points on plasterboard sheets or panels The mounting location must be suitable for the weight and dimensions of the Connection Unit see Section 11 Technical Data page 48 When mounting directly below the inverter the minimum clearances to the inverter must be observed see the inverter installation manual The mounting loc
36. ry and to ensure the safe installation and operation of the product you must carefully read and follow all instructions cautions and warnings in this manual Warnings in this document A warning describes a hazard to equipment or personnel It calls attention to a procedure or practice which if not correctly performed or adhered to could result in damage to or destruction of part or all of the SMA equipment and or other equipment connected to the SMA equipment or personal injury symbol A DANGER DANGER indicates a hazardous situation which if not avoided will result in death or serious injury A WARNING WARNING indicates a hazardous situation which if not avoided could result in death or serious injury A CAUTION CAUTION indicates a hazardous situation which if not avoided could result in minor or moderate injury NOTICE NOTICE is used to address practices not related to personal injury 4 CU600 1000US lA en 10 Installation Manual SMA America LLC IMPORTANT SAFETY INSTRUCTIONS Warnings on this product The following symbols are used as product markings with the following meanings symbol Warning regarding dangerous voltage The product works with high voltages All work on the product must only be performed as described in the documentation of the product Beware of hot surface The product can become hot during operation Do not touch the product during operation Risk of Fire AN Improper installation o
37. s in the brackets of the Connection Unit Use at least one of the oblong holes at the top and at the bottom Remove the Connection Unit from the post Drill holes at the markings Insert suitable screw anchors into the drill holes o gt h gt p Insert screws with washers through the oblong holes of the Connection Unit into the drill holes 7 Tighten the screws Ensure that no screws are loose 8 Ensure that the Connection Unit is firmly positioned Installation Manual CU600 1000US IA en 10 25 6 Electrical Connection SMA America LLC 6 Electrical Connection 6 1 Safety during Electrical Connection A DANGER Danger to life due to high voltages in the Connection Unit High voltages that can cause fatal electric shocks when touched are present in the live components of the Connection Unit All work on the Connection Unit must be carried out by qualified persons only Prior to performing any work on the Connection Unit disconnect it from any voltage source as described in this document see Section 8 All work on the Connection Unit should only be carried out as described in this document NOTICE Damage to the seal of the enclosure lid during frost When opening the Connection Unit during frost the seal of the enclosure lid can be damaged There may be an ingress of moisture damaging the Connection Unit e Do not open the Connection Unit when the ambient temperature is below 23 F 5 C
38. t all cables are connected with the right polarity using the reverse polarity detection see Section 6 7 Operating the Reverse Polarity Detection page 36 6 7 Operating the Reverse Polarity Detection The reverse polarity detection of the Connection Unit 1000 US allows you to test if all cables have been connected with the correct polarity Requirements O The DC cables of the PV array must be connected to the terminals DL The DC switch disconnector must be turned OFF and the lid dismantled O For the reverse polarity detection to function the DC voltage must be at least 100 V A WARNING Danger to life due to electric shock The strings in the Connection Unit are combined to one main string If there is reverse polarity of a PV string there can be short circuit current flowing when string fuses are inserted string safety levers are closed and the DC switch disconnector is open e All safety levers must be opened all the way before you can use the reverse polarity detection 36 CU600 1000US lA en 10 Installation Manual SMA America LLC 6 Electrical Connection Procedure 1 Establish the DC voltage supply 2 Press the button for reverse polarity detection once MM The middle LED glows green for a few seconds All DC cables are correctly connected How long the LED glows depends on the level of the applied DC voltage X The left LED glows red for a few seconds How long the LED glows depends on the le
39. ve DC cables of the PV array INPUT B Fuse holders for string fuses and terminals for connecting the positive DC cables of the PV array INPUT B Fuse holders for string fuses and terminals for connecting the negative DC cables of the PV array INPUT A Equipment Equipment grounding terminal terminal Terminals for connecting the DC output cables INPUT A G Fuse holders for string fuses and terminals for connecting the positive DC cables of the PV see TT TY INPUT A 28 CU600 1000US lA en 10 Installation Manual SMA America LLC 6 Electrical Connection 6 2 3 Interior View Connection Unit 1000 US A M I B i D L C K D E Designation Shaft of the DC switch disconnector D Fuse holders for string fuses INPUTB Terminals for connecting the negative DC cables of the PV array INPUT B Reverse polarity detection Terminals for connecting the negative DC cables of the PV array INPUT A Terminals for connecting the positive DC cables of the PV array INPUT A Fuse extractor for string fuses INPUT A Equipment grounding terminal Terminals for connecting the DC output cables INPU
40. vel of the applied DC voltage At least two of the connected cables at INPUT B are connected with reversed polarity e Check polarity and connect the cable to the correct terminal X The red LED glows red for a few seconds How long the LED glows depends on the level of the applied DC voltage At least two of the connected cables at INPUT B are connected with reversed polarity e Check polarity and connect the cable to the correct terminal x All LEDs are off The polarity test could not be carried out Make sure that the DC voltage ist at least 100 V and wait for about 1 minute Then press the button again e If there is sufficient DC voltage and the problem still persists check the polarity at each terminal with a suitable multimeter In case of reverse polarity connect the respective cable to the correct terminal Installation Manual CU600 1000US IA en 10 37 6 Electrical Connection SMA America LLC 6 8 Connecting the DC Output Cable for the Inverter to the Connection Unit Additionally required mounting material not included in the scope of delivery CL Two cables for connecting the Connection Unit to the inverter LI Ifthe DC switch disconnector should be protected against restarting a padlock can be used Cable requirements DL The DC output cables must be designed in accordance with the installation requirements applicable on site and for temperatures of 194 F 90 C LD Cable type copper wire O Use only s
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