10
InstallatIon and oPERatIon ManUal FoR sl2 solaR ModUlEs oF tHE GEnERatIon G2.1 and G2.2
2 plannIng
2.4 electrIcal layout
requirements on the system
You can find the detailed electrical parameters in the product
data sheet.
¼
only connect modules of the same type and the same power
class.
¼
The voltage limitation of the inverter must also be taken into
account in the layout of the string length.
¼
Do not operate modules in short circuit.
¼
Do not operate modules longer than 90 days in open terminal
voltage.
safety factor
During normal operation, the module may provide a greater
currentand/orahighervoltagethanthatdeterminedunderstan
-
dardized test conditions. A safety factor of 1.25 for i
Sc
and v
oc
should therefore be applied when:
Determining the voltage rated values of the components
used,
Determining the current rated values of the cables, the size of
the fuses and dimensioning the controls.
¼
The relevant applicable national regulations for the installa-
tion of electrical systems should be applied.
series connection
Serial connection of the modules is only permitted up to the
maximumsystemvoltagespecifiedinthecurrentvaliddatasheet.
carry out the layout taking into account all working conditions
andrelevanttechnicalspecificationsandstandards.Thiswill
help you ensure that the maximum system voltage, including
the necessary safety margins, is not exceeded.
parallel connection
¼
only connect modules of the same type and power class.
¼
Do not exceed the maximum permissible reverse current as
given in the respective data sheet. in the event of reverse cur-
rents (caused by module defects, ground leakage or shading),
modules can be placed under strain.
in order to safely account for reverse currents, we recommend the
following fuse variants:
layout with limit on the number of strings operated in parallel
Without further measures for current limitation, only a maximum
of 2 strings of modules may be operated parallel on an inverter.
layout with string diodes
When more than 2 strings are connected parallel, a maximum of
2 strings respectively must be protected against reverse currents
from the remaining system with a shared string diode.
layout with string fuses
in this case, the modules of each string must be fused with 4 A.
note!
When installing modules from different product revisions, observe
the minimum permitted reverse current loading capability.
InVerter
Solibro modules must exclusively be operated with inverters
where the negative generator pole must be grounded or its poten-
tial curve must always be positive.
note!
You can find more information about functional grounding in
chapter 5.1.
