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SMA America, LLC
Other symbols in this document
In addition to the safety and hazard symbols described on the previous pages, the following symbol
is also used in this installation guide:
Information
This symbol accompanies notes that call attention to supplementary information that you must
know and use to ensure optimal operation of the system.
Markings on this product
The following symbols are used as product markings with the following meanings.
Warning regarding dangerous voltage
The product works with high voltages. All work on the product must only be
performed as described in it's documentation.
Electric arc hazards
The product has large electrical potential differences between its conductors. Arc
flashes can occur through air when high-voltage current flows. Do not work on the
product during operation.
Beware of hot surface
The product can become hot during operation. Do not touch the product during
operation.
Observe the operating instructions
Read the documentation of the product before performing any work. Follow all safety
precautions and instructions as described in the documentation.
UL1741 is the standard applied by Underwriters Laboratories to the AC/DC-
Disconnect Unit for Sunny Central 250U / 500U / 500HE-US/CA to certify that it
meets the requirements of the National Electrical Code
®
Code
regarding the proper equipment and functionality necessary to ensure compatible
operation when power generation is connected to the utility grid.
Installation Guide
CSA C22.1 and IEEE‑929‑2000. IEEE 929-2000 provides recommendations
®
, the Canadian Electrical
DisconACDC_SCUS-IUS103110
5
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