SMA NA-BOX 12 Operating Manual
SUNNY ISL
AND
NA-BOX-12-3-20-BE-en-12 | Version 1.2ENGLISH
Operating manual
NA-BOX 12
Legal Provisions
SMA Solar Technology AG
Operating manualNA-BOX-12-3-20-BE-en-122
Legal Provisions
The information contained in these documents is the property of SMA Solar Technology AG. No part of this document
may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means, be it electronic,
mechanical, photographic, magnetic or otherwise, without the prior written permission of SMA Solar Technology AG.
Internal reproduction used solely for the purpose of product evaluation or other proper use is allowed and does not
require prior approval.
SMA Solar Technology AG makes no representations or warranties, 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 representations or warranties are
expressly disclaimed. Neither SMA Solar Technology AG 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 product improvements and field usage experience may
cause SMA Solar Technology AG to make changes to these specifications without advance notice, or per contract
provisions in those cases where a supply agreement requires advance notice. SMA Solar Technology AG 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.
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. Missing designations do not mean that a
product or brand is not a registered trademark.
SMA Solar Technology AG
Sonnenallee 1
34266 Niestetal
Germany
Tel. +49 561 9522-0
Fax +49 561 9522-100
www.SMA.de
Email: info@SMA.de
Status: 2/13/2019
Copyright © 2019 SMA Solar Technology AG. All rights reserved.
Table of Contents
SMA Solar Technology AG
Operating manual 3NA-BOX-12-3-20-BE-en-12
Table of Contents
1 Information on this Document..................................................................................................... 5
1.1 Validity ............................................................................................................................................................. 5
1.2 Target Group ................................................................................................................................................... 5
1.3 Levels of warning messages............................................................................................................................ 5
1.4 Symbols in the Document................................................................................................................................ 5
1.5 Typographies in the document ....................................................................................................................... 6
1.6 Designation in the document .......................................................................................................................... 6
1.7 Additional Information..................................................................................................................................... 6
2 Safety ............................................................................................................................................ 7
2.1 Intended Use.................................................................................................................................................... 7
2.2 IMPORTANT SAFETY INSTRUCTIONS......................................................................................................... 7
3 Scope of Delivery ......................................................................................................................... 10
4 Product Overview ........................................................................................................................ 11
4.1 Product Description.......................................................................................................................................... 11
4.2 Symbols on the Product................................................................................................................................... 12
4.3 System Structure............................................................................................................................................... 13
5 Mounting....................................................................................................................................... 14
5.1 Requirements for Mounting............................................................................................................................. 14
5.2 Preparing the Mounting Location ................................................................................................................... 15
5.3 Transporting and Mounting the Product ........................................................................................................ 16
6 Electrical Connection .................................................................................................................... 18
6.1 Overview of the Connection Area.................................................................................................................. 18
6.1.1 Interior View ..................................................................................................................................................... 18
6.1.2 View from Below.............................................................................................................................................. 19
6.2 Connecting the Multicluster-Box ..................................................................................................................... 19
6.3 Connecting the Utility Grid ............................................................................................................................. 19
6.4 Connecting Control and Measuring Cables of the Multicluster-Box............................................................ 20
6.5 Mounting the Kick Plates................................................................................................................................. 21
7 Preparing for Commissioning ..................................................................................................... 22
8 Disconnect from voltage sources ................................................................................................ 23
9 Periodic Actions ............................................................................................................................ 24
9.1 Removing the Protective Cover....................................................................................................................... 24
9.2 Inserting Power and Control Cables .............................................................................................................. 25
9.3 Connecting Power Cables to Spring-Cage Terminals................................................................................... 26
9.4 Connecting Control Cables to Spring-Cage Terminals ................................................................................. 27
9.5 Mounting the Protective Cover ....................................................................................................................... 28
10 Maintenance ................................................................................................................................. 29
10.1 Inspection of Residual-Current Devices .......................................................................................................... 29
10.2 Checking the Surge Arresters ......................................................................................................................... 30
10.3 Testing the Tie Switch Tripping Function Every 6 Months ............................................................................. 30
10.4 General Maintenance Work .......................................................................................................................... 32
11 Decommissioning the Product ..................................................................................................... 34
Table of Contents
SMA Solar Technology AG
Operating manualNA-BOX-12-3-20-BE-en-124
12 Technical Data .............................................................................................................................. 35
13 Contact .......................................................................................................................................... 38
1 Information on this Document
SMA Solar Technology AG
Operating manual 5NA-BOX-12-3-20-BE-en-12
1 Information on this Document
1.1 Validity
This document is valid for:
• NA-BOX-12.3-20 (NA-Box 12)
1.2 Target Group
The tasks described in this document must only be performed by qualified persons. Qualified persons must have the
following skills:
• Training in how to deal with the dangers and risks associated with installing, repairing and using electrical
devices, batteries and installations
• Training in the installation and commissioning of electrical devices and installations
• Knowledge of all applicable laws, standards and directives
• Knowledge of and compliance with this document and all safety information
1.3 Levels of warning messages
The following levels of warning messages may occur when handling the product.
DANGER
Indicates a hazardous situation which, if not avoided, will result in death or serious injury.
WARNING
Indicates a hazardous situation which, if not avoided, could result in death or serious injury.
CAUTION
Indicates a hazardous situation which, if not avoided, could result in minor or moderate injury.
NOTICE
Indicates a situation which, if not avoided, can result in property damage.
1.4 Symbols in the Document
Symbol Explanation
Information that is important for a specific topic or goal, but is not safety-relevant
☐
Indicates a requirement for meeting a specific goal
☑
Desired result
✖
A problem that might occur
Example
1 Information on this Document
SMA Solar Technology AG
Operating manualNA-BOX-12-3-20-BE-en-126
1.5 Typographies in the document
Typography Use Example
bold
• Messages
• Terminals
• Elements on a user interface
• Elements to be selected
• Elements to be entered
• Connect the insulated conductors
to the terminals X703:1 to
X703:6.
• Enter 10 in the field Minutes.
>
• Connects several elements to be
selected
• Select Settings > Date.
[Button]
[Key]
• Button or key to be selected or pressed
• Select [Enter].
1.6 Designation in the document
Complete designation Designation in this document
Multicluster-Box 12 Multicluster-Box
NA-Box 12 NA-Box
SunnyIsland 6.0H / 8.0H Sunny Island, battery inverter
1.7 Additional Information
For more information, please go to www.SMA-Solar.com.
Title and information content Type of information
MULTICLUSTER-BOX 12 Installation – circuitry overview
MULTICLUSTER-BOX 12 Operating manual
2 Safety
SMA Solar Technology AG
Operating manual 7NA-BOX-12-3-20-BE-en-12
2 Safety
2.1 Intended Use
The NA-Box is an automatic transfer switch and enables the operation of an SMA multicluster system on a utility grid in
accordance with the VDE-AR-N4105 application regulations.
Do not exceed the maximum AC connection power of the NA-Box. Cables with copper conductors must be used for
the installation.
When using an NA-Box in Germany, the following additional connection conditions must be observed:
• Maximum output power of the PV system: 100kW
• Maximum feed-in power into the utility grid: 100kW
The NA-Box may only be commissioned in conjunction with the Multicluster-Box.
In terms of interference immunity, the product is suitable for EMC environment A, and in terms of EMC emissions, it is
suitable for EMC environment B (as per IEC 61439-1:2011).
The product is designed for indoor use only.
Only operate the product at temperatures between −-25°C and +60°C.
The NA-Box is designed for use at altitudes of up to 2000 m above Mean Sea Level. If you would like to use the NA-
Box at altitudes above 2000 m, contact Service (see Section13, page38).
Use this product only in accordance with the information provided in the enclosed documentation and with the locally
applicable laws, regulations, standards and directives. Any other application may cause personal injury or property
damage.
Alterations to the product, e.g. changes or modifications, are only permitted with the express written permission of
SMA Solar Technology AG. Unauthorized alterations will void guarantee and warranty claims and in most cases
terminate 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 the intended use.
The enclosed documentation is an integral part of this product. Keep the documentation in a convenient, dry place for
future reference and observe all instructions contained therein.
This document does not replace and is not intended to replace any local, state, provincial, federal or national laws,
regulations or codes applicable to the installation, electrical safety and use of the product. SMA Solar Technology AG
assumes no responsibility for the compliance or non-compliance with such laws or codes in connection with the
installation of the product.
The type label must remain permanently attached to the product.
2.2 IMPORTANT SAFETY INSTRUCTIONS
SAVE THESE INSTRUCTIONS
This section contains safety information that must be observed at all times when working on or with the product.
The product has been designed and tested in accordance with international safety requirements. As with all electrical
or electronical devices, there are residual risks despite careful construction. 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.
2 Safety
SMA Solar Technology AG
Operating manualNA-BOX-12-3-20-BE-en-128
DANGER
Danger to life due to electric shock when live components or cables are touched
High voltages are present in the conductive components or cables of the product. Touching live parts and cables
results in death or lethal injuries due to electric shock.
• Do not touch non-insulated parts or cables.
• Disconnect the product from voltage sources and make sure it cannot be reconnected before working on the
device.
• Only disassemble the protective covers, if the product is disconnected from all voltage sources.
• Wear suitable personal protective equipment for all work on the product.
CAUTION
Risk of injury if the product tips over
The product is heavy and may tip over if not properly fastened to the support surface. This can result in crushing
injuries.
• Upon installation, attach the product to the support surface.
CAUTION
Risk of burns due to hot components
Some components and terminals inside the product can become hot during operation. Touching hot components or
terminals can result in burn injuries.
• Wear suitable personal protective equipment for all work on the product.
• Only operate the product with its protective cover mounted.
• Prior to removing the protective cover, let the product cool down.
CAUTION
Injury to persons or property damage due to unauthorized access to the grid and PV system
protection of the NA-Box
Unauthorized access or incorrect settings on the grid and PV system protection device in the NA-Box can cause grid
failures, yield losses, damage to the multicluster system or the NA-Box and injuries to persons. Furthermore, the
operating licence may also be revoked.
• Prior to commissioning the NA-Box, secure the grid and PV system protection device against unauthorized
access. The password protection must be activated on the grid and PV system protection device (see grid and
PV system protection documentation).
• Only operate the NA-Box when the grid and PV system protection device is secured against unauthorized
access.
2 Safety
SMA Solar Technology AG
Operating manual 9NA-BOX-12-3-20-BE-en-12
NOTICE
Damage to the product due to sand, dust and moisture ingress
Sand, dust and moisture penetration can damage the product and impair its functionality.
• Do not open the product during a dust storm or precipitation.
• Close the product in case of interruption of work or after finishing work.
• The product must only be closed during operation.
• Store the product in a dry and covered location when closed. Observe storage conditions.
Effects of an emergency disconnection
Emergency disconnection on the battery inverter triggers the uncontrolled shutdown of the system and unsaved
data is lost.
• Only trip the emergency disconnection to avoid danger or consequential damage.
• In the event of an emergency disconnection, always check whether any fuse elements in the product, such as
circuit breakers, have tripped.
• If any fuse elements have tripped, reactivate these fuse elements.
3 Scope of Delivery
SMA Solar Technology AG
Operating manualNA-BOX-12-3-20-BE-en-1210
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.
B D
C
E
A
Figure 1: Components included in the scope of delivery
Position Quantity Designation
A 1 NA-Box
B 10 Strain relief with counter sleeve (22mmto28mm)
C 2 Fuse link 6A, tripping characteristics: gG
D 2 Fuse link 1A, tripping characteristics: gG
E 1 Operating manual and documentation for the grid and PV system protection de-
vice
4 Product Overview
SMA Solar Technology AG
Operating manual 11NA-BOX-12-3-20-BE-en-12
4 Product Overview
4.1 Product Description
The NA-Box is an automatic transfer switch. It enables the operation of an SMA multicluster system on a utility grid in
accordance with the VDE-AR-N4105 application regulations. In the event of a grid failure, the NA-Box disconnects
the SMA multicluster system from the utility grid via a redundant tie switch.
A
C
D F
G
E
GB
Figure 2: NA-Box with cabinet door open
Position Designation
A Protective cover
Prevents inadvertent contact with live components during operation and thus protects
from electric shocks. When the product is in operation, the protective covers must always be mounted.
B Type label
The type label clearly identifies the product. The type label must remain permanently attached to the product. You will find the following information on the type label:
• Device type (Model)
• Serial number (Serial No. or S/N)
• Date of manufacture
• Device-specific characteristics
C Fuse holder 6A
Used as receptacles for cylindrical thermal fuses (6A, tripping characteristic gG). The
thermal fuses protect the connected conductors from excessive heat build-up due to
overload or short circuits.
D External grid and PV system protection device which interrupts the connection between
the power generation system and the electricity grid in the event of voltage- or frequency disturbances via the control of a redundant tie switch.
The grid and PV system protection device monitors the utility grid voltage and frequency for disturbances. If the values fall below the lower limits or exceed the upper
limits, the grid and PV system protection device disconnects the power generation system from the utility grid by opening the redundant tie switch.
The NA-Box is fitted with the grid and PV system protection device manufactured by
BenderGmbH&Co.KG.
4 Product Overview
SMA Solar Technology AG
Operating manualNA-BOX-12-3-20-BE-en-1212
Position Designation
E Test button for the tie switch
The tripping mechanism of the tie switch must be tested regularly for correct operation
(see Section10.3, page30).
F Fuse holder 1A
Used as receptacles for cylindrical thermal fuses (1A, tripping characteristic gG). The
thermal fuses protect the connected conductors from excessive heat build-up due to
overload or short circuits.
4.2 Symbols on the Product
Symbol Explanation
Beware of electrical voltage
The product operates at high voltages.
Beware of hot surface
The product can get hot during operation.
Observe the documentation
Observe all documentation supplied with the product.
Grounding conductor
This symbol indicates the position for connecting a grounding conductor.
WEEE designation
Do not dispose of the product together with the household waste but in accordance with the
disposal regulations for electronic waste applicable at the installation site.
Degree of protectionIP55
The product is protected against interior dust deposits and water that is directed as a jet
against the enclosure from all directions.
CE marking
The product complies with the requirements of the applicable EU directives.
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