SMA SHP 125-US-20, Operating Manual

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2 Safety SMA Solar Technology AG
Operating manual SHP-US-20-BE-en-10 8
2 Safety
2.1 Intended Use
The Sunny Highpower is a transformerless PV inverter that converts the direct current from the
PV array into grid-compliant three-phase current. An external transformer fitted downstream feeds
the alternating current generated into the utility grid.
The product is intended for use in commercial, industrial or business sectors.
The product complies with IEC 60721-3-4 as per Class 4C2 and is suitable for operation in a
chemically active environment.
The product is suitable for indoor and outdoor use.
The product must only be operated with PV modules of protection class II in accordance with
IEC 61730, application class A. The PV modules must be compatible with this product.
The product must only be operated with PV arrays (PV modules and cabling) that are approved by
the electrical standards applicable on-site and the
National Electrical Code
®
ANSI/NFPA 70 or
the
Canadian Electrical Code ®
CSA C22.1.
The product may only be operated in connection with a suitable medium-voltage transformer. The
low-voltage side must be configured in a star formation and the neutral point must be grounded (for
information about the requirements of the medium-voltage transformer, consult the technical
information "Important Requirements for Medium-Voltage Transformers" under www.SMA-
Solar.com).
No galvanic isolation
The product is not equipped with a transformer and therefore has no galvanic isolation.
• Do not operate grounded PV modules together with the product. If grounded PV modules
are connected to the product, an event will occur. The event will be displayed, along with
the associated message, in the event list on the user interface of the product.
• Only ground the mounting frames of the PV modules.
PV modules with a high capacity to ground may only be used if their coupling capacity does not
exceed 32 μF.
To protect the PV system against excessive reverse currents under fault conditions, a DC-side
overcurrent protective device must be connected in accordance with the
National Electrical Code ®
to prevent any short-circuit currents that exceed the ampacity of the DC electric circuit or the
maximum series fuse rating of the PV modules. Typically, string fuses are used if more than two
strings are connected in parallel.
All components must remain within their permitted operating ranges and their installation
requirements at all times.
The product is approved for the US and Canadian market.
Use SMA products 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.