SMA 600-US User Manual

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Accessories for PV Inverters

SMA CONNECTION UNIT 600-US / 1000-US

Installation Manual








CU600-1000US-IA-en-10 \| IMEN-CU-US \| Version 1.0	CA	US

SMA America, LLC

Legal Provisions

Nopartofthisdocumentmaybereproduced,storedinaretrievalsystem,ortransmitted,inanyform or by any means, electronic, mechanical, photographic, magnetic or otherwise, without the prior written permission of SMA America, LLC.

NeitherSMAAmerica, LLC nor SMASolarTechnologyCanada 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 anyparticularpurpose.Allsuchwarrantiesareexpresslydisclaimed.NeitherSMAAmerica, LLCnor 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 right 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 L4W 5K4

Canada

Installation Manual

CU600-1000US-IA-en-10

IMPORTANT SAFETY INSTRUCTIONS

SMA America, LLC

IMPORTANT SAFETY INSTRUCTIONS

SAVE THESE INSTRUCTIONS

This manual contains important instructions for the following products:

•CU 600-US-10 (SMA Connection Unit 600-US)

•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 injury 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

Awarningdescribesahazardtoequipmentorpersonnel.Itcallsattentiontoaprocedureorpractice, which,ifnotcorrectlyperformedoradheredto,couldresultindamagetoordestructionofpartorall of the SMA equipment and/or other equipment connected to the SMA equipment or personal injury.

Symbol Description

DANGER indicates a hazardous situation which, if not avoided, will result in death or serious injury.

WARNINGindicatesahazardoussituationwhich,ifnotavoided,couldresult in death or serious injury.

CAUTION indicates ahazardous situationwhich,if not avoided, could result in minor or moderate injury.

NOTICE is used to address practices not related to personal injury.

CU600-1000US-IA-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 Description

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

Improper installation of 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

General Warnings

SMA America, LLC

General Warnings

AllelectricalinstallationsmustbemadeinaccordancewiththelocalandNational ElectricalCode® ANSI/NFPA70ortheCanadian Electrical Code® CSA C22.1.Thisdocumentdoesnotandisnot 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.

CU600-1000US-IA-en-10

Installation Manual

SMA America, LLC

Table of Contents

1 Information on this Document. . . . . . . . . . . . . . . . . . . . . . . . . . . 9 2 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

2.1 Intended Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 2.2 Skills of Qualified Persons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 2.3 Safety Precautions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

3 Scope of Delivery. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

4 Product Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

4.1 Connection Unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 4.2 Type Label. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 4.3 DC Switch-Disconnector. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 4.4 String Fuses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 4.5 Reverse Polarity Detection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

5 Mounting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

5.1 Requirements for Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 5.2 Mounting the Connection Unit on a Wall . . . . . . . . . . . . . . . . . . . . . 23 5.3 Mounting the Connection Unit to a Post . . . . . . . . . . . . . . . . . . . . . . 25

6 Electrical Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

6.1 Safety during Electrical Connection. . . . . . . . . . . . . . . . . . . . . . . . . . 26 6.2 Overview of the Connection Area. . . . . . . . . . . . . . . . . . . . . . . . . . . 27

6.2.1 Enclosure Openings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 6.2.2 Interior View of the Connection Unit 600-US. . . . . . . . . . . . . . . . . . 28 6.2.3 Interior View Connection Unit 1000-US . . . . . . . . . . . . . . . . . . . . . 29

6.3 Connecting Conduits to the Connection Unit. . . . . . . . . . . . . . . . . . . 30 6.4 Connecting the Grounding Conductor . . . . . . . . . . . . . . . . . . . . . . . 31 6.5 Connecting the PV Array to the Connection Unit 600-US. . . . . . . . . 33 6.6 Connecting the PV Array to the Connection Unit 1000-US. . . . . . . . 35 6.7 Operating the Reverse Polarity Detection . . . . . . . . . . . . . . . . . . . . . 36

6.8 Connecting the DC Output Cable for the Inverter to the

Connection Unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Installation Manual

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Table of Contents

SMA America, LLC

7 Commissioning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

7.1 Inserting the String Fuses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 7.2 Commissioning the Connection Unit . . . . . . . . . . . . . . . . . . . . . . . . . 42

8 Disconnecting the Connection Unit from Voltage Sources . . . 43 9 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

9.1 LED Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44 9.2 Replacing the String Fuses. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

10 Decommissioning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

10.1 Disassembling the Connection Unit . . . . . . . . . . . . . . . . . . . . . . . . . . 47 10.2 Packing the Connection Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47 10.3 Disposing of the Connection Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

11 Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48 12 Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 13 Contact . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

CU600-1000US-IA-en-10

Installation Manual

SMA America, LLC

1 Information on this Document

Validity

This document is valid for the following device types:

•CU 600-US-10 (SMA Connection Unit 600-US)

•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 / 7000TLUS / 8000TLUS / 9000TLUS /	Installation manual
10000TLUS / 11000TLUS

Symbols

Symbol Explanation

Information that is important for a specific topic or goal, but is not safety-relevant

Indicates an essential requirement for achieving a specific goal

Desired result

A problem that could occur

Nomenclature

Complete designation	Designation in this document
SMA America Production, LLC	SMA
SMA Solar Technology Canada Inc.	SMA
SMA Connection Unit 600-US / 1000-US	Connection Unit, product

Installation Manual

CU600-1000US-IA-en-10

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.

Figure 1: Example design of a PV system with Connection Unit

Item Designation

APV modules

BConnection Unit

CSunny Tripower

DCircuit breaker

EUtility grid

The Connection Unit is suitable for indoor and outdoor use.

TheConnectionUnit must only beusedinungroundedPVsystems. DonotusegroundedPVmodules 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 accordingtotheNational Electrical Code® NEC690.TheConnectionUnitshallbeinstalledperthe 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:

•SB 6000TLUS-12 / 7000TLUS-12 / 8000TLUS-12 / 9000TLUS-12 / 10000TLUS-12 / 11000TLUS-12

•STP 12000TL-US-10 / 15000TL-US-10 / 20000TL-US-10 / 24000TL-US-10

For safety reasons, it is forbidden to modify the product or 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.

•Do not install the product in potentially explosive atmospheres.

CU600-1000US-IA-en-10

Installation Manual

SMA America, LLC

2 Safety

The enclosed documentation is an integral part of this product.

•Read and observe the documentation.

•Keep the documentation in a convenient place for future reference.

2.2 Skills of Qualified Persons

Thetasksdescribedinthisdocumentmustbeperformedbyqualifiedpersonsonly.Qualifiedpersons must have the following skills:

•Knowledge of how electrical devices and plants work and are operated

•Traininginhowtodealwiththedangersandrisksassociatedwithinstallingandusingelectrical devices and plants

•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

2 Safety

SMA America, LLC

2.3 Safety Precautions

This section contains safety precautions that must be observed at all times when working on or with the product.

Topreventpersonalinjuryorpropertydamageandtoensurelong-termoperationoftheproduct,read this section carefully and follow all safety precautions at all times.

Danger to life due to high voltages in the Connection Unit

Highvoltagesthat cancausefatalelectricshockswhentouchedarepresentinthelivecomponents of the Connection Unit.

•All work on the Connection Unit must be carried out by qualified persons only.

•Before working on the Connection Unit carry out the following steps:

–Switchoffall devicesthatareconnectedtotheConnectionUnit(e.g.inverter)andprotect 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.

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.

•Only operate the Connection Unit when it is functioning properly and safely.

•Regularly check the Connection Unit for visible damage.

•Ensure that all safety equipment is freely accessible at all times.

Damage to the Connection Unit due to electrostatic discharges

By touching electronic components you can damage or destroy the Connection Unit through electrostatic discharge.

• Ground yourself before touching any components.

CU600-1000US-IA-en-10

Installation Manual

SMA America, LLC

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.

Figure 2: Components included in the scope of delivery

Item	Quantity	Designation
A	1	Connection Unit
B	1	Installation manual, Production Test Report

Installation Manual

CU600-1000US-IA-en-10

4 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.

Figure 3: Design of the Connection Unit

Item Designation

ADC switch-disconnector

BCaptive screws of the lid

CType 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 Explanation

Equipment grounding

No galvanic isolation

CU600-1000US-IA-en-10

Installation Manual

SMA America, LLC

4 Product Description

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:

•Device type (Item No.)

•Serial number (Serial No.)

•Date of manufacture,

•Device-specific characteristics

YouwillrequiretheinformationonthetypelabeltousetheConnectionUnitsafelyandwhenseeking customer support from the SMA Service Line. The type label must be permanently attached to the Connection Unit.

Symbols on the Type Label

Symbol 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 from hot surfaces

Theproductcangethotduringoperation.Avoidcontactduringoperation.

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

UL1741 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 connected to the utility grid.

Installation Manual

CU600-1000US-IA-en-10

4 Product Description

SMA America, LLC

4.3 DC Switch-Disconnector

TheConnectionUnitisequippedwithaDCswitch-disconnector.TheDCswitch-disconnectorenables 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

ASwitch position ON

BSwitch 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

Stringfusesareusedtoprotectwiringandequipmentfromexcessivecurrentsthatcancausedamage, heating, or in extreme cases, even fire.

Ifthestringfusesaredesignedtoosmall,theymayopentooearlyandcauseinterference.Ifthestring fuses are designed too large, they do not provide the required protection as they open too late.

InPVsystems,theminimumandmaximumsizeofthestringfuseisdeterminedbytheelectricalnominal sizes of the PV module as well as by UL and National Electrical Code® requirements. Contact the manufacturerofthePVmodulesinordertoobtainthecorrespondingnominalsizesofthestringfuses.

The maximum nominal size for string fuses in the Connection Unit is 20 A.

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Installation Manual

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