Safety Instructions
SMA
Technologie AG
Page 8
SC-100-13:SE2407
Installation manual
3.8 Electrical Connection
The electrical connection must be performed according to the installation guide, the
device connection plan and the technical data of the device.
AC Grid Connection
The customer must determine the required grid connection type for the AC grid
connection (TN-C, TN-S, TT grid) and coordinate it with SMA.
Ensure the grid connection cable for grid feeding is fused at the nominal current
indicated on the name plate. If the specified nominal current differs from the nominal
current of the fuse plug, the fuse plug having the next highest nominal current may be
used. A power switch is used for the optional load-disconnecting switch.
An external input control voltage (optional) must be fused with a circuit breaker
conforming to the specifications in Appendix B (SC100 Indoor / Outdoor technical
data).
Lightning / Overvoltage Protection
The device has internal overvoltage protection on the DC side and, depending on the
option chosen, also has lightning and/or overvoltage protection on the AC side. The
desired level of protection can only be achieved when the grid connection point has a
Lightning Protection Zones Concept in compliance with DIN VDE 0185-3 (DIN EN
62305 / VDE 085, part 305-3). In keeping with the Lightning Protection Zones
Concept, there are lightning conductors and combined overvoltage protectors which
are not included in the scope of delivery for the equipment and which must be installed
at the entrance (transfer point from lightning protection zone LPZ 0 to LPZ 1).
SMA must be informed of the required AC grid connection type!
We recommend using lightning protection for the PV generator.
A direct strike can irreparably damage the overvoltage protectors or other system
components and cause additional consequential damages.
We recommend expanding the lightning and overvoltage protection for external
input control voltage. Please see section 7.1.9 Lightning and Overvoltage
Protection.
