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Electrical Connection
7.1.9 PV Generator Power Connection (DC Connection)
A busbar that allows string distribution boxes to be connected is located in the left lower
area of the inverter sidewall. Cables rated for a minimum of 900 V are required for
connecting the DC cables to the fuse inputs of the inverter. The voltage resistance must
be at least 1000 V for inverters that are equipped with an optional EVR. The SC100 is
equipped with 3 DC inputs (see data sheet Appendix B).
The cables are fed through the socket and the base of the cabinet. To do this, the base
plates in the front of the cabinet are opened and the cable pulled into the inside of the
cabinet. Suitable cable screw connections must be installed in the removable base
plates to provide strain relief for the cable. A variety of threaded joint sizes is provided
for this purpose.
The DC cables are connected directly to the busbar using M12 cable lugs. See
the electrical connection section in the table located in Appendix C.
The DC cables to be connected must be rated for a minimum of 900 V.
They must have a voltage resistance of at least 1000 V for an optional
EVR.
The DC voltage of the PV generator must never exceed the maximum
permissible inverter input voltage.
Otherwise the inverter is in acute danger when connected! U
1000 V!
All cable feeds and base plates must be locked tightly so that no small
animals can enter the device!
Since the Sunny Central is not equipped with a fuse, the DC cables to be
connected must be designed for at least 2/3 of the maximum generator
current rating.
Page 34
SC-100-13:SE2407
SMA
Technologie AG
< 900 /
PV
Installation manual
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