2 Safety
SMA Solar Technology AG
Operating manual
7
NA-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-N 4105 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: 100 kW
• Maximum feed-in power into the utility grid: 100 kW
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 Section 13, page 38).
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.
