SMA SUNNY TRIPOWER X 20-US - Safety; Intended Use

2 Safety
SMA Solar Technology AG
Operating manual STPxx-US-50-BE-en-11 11
2 Safety
2.1 Intended Use
The SunnyTripower is a transformerless PV inverter, with 3 MPP trackers, that converts the direct
current of the PV modules to grid-compliant, three-phase current and feeds it into the utility grid.
The product is suitable for indoor and outdoor use.
If the product is operated with a medium-voltage transformer, the low-voltage side must be
configured in a star formation and the neutral point 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).
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.
Transformerless (Non-isolated)
The product is not equipped with a transformer and therefore has no galvanic isolation.
The neutral conductor of the AC output is not bonded to ground within the product.
• 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.
• The neutral conductor of the AC output is not bonded to ground within the product. When
connecting a utility grid without neutral conductor, N and PE of the AC terminal must be
bridged.
PV modules with a high capacity to ground must only be used if the coupling capacity of all PV
modules does not exceed 6μF.
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.
Alterations to SMA products, e.g., changes or modifications, are only permitted with the express
written permission of and according to the instructions from SMA Solar Technology AG.
Unauthorized alterations can be dangerous and lead to personal injury. In addition, an
unauthorized alteration 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
appropriate.
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.