Centrosolar S-Class Excellent Manual Del Usuario página 24

Proper wiring
Never open the connection box! The modules are
already fitted with all necessary wires and connec-
tors .
Ensure correct wiring:
The integrated connection cables are UV re-
sistant. The conductor cross-section of the
connection cables is 4 mm². For wiring, the
connection cables are fitted with prefabricated
connectors, which are protected against re-
verse polarity.
Keep the total area of all conductor loops as low
as possible in order to reduce the voltages due to
indirect lightning strikes . Always carry out a care-
ful final check of the wiring prior to commissioning
the generator . If the measured open circuit voltage
diverges from the default value, a wiring error has
occurred . Check for correct polarity .
Merge the connectors together correctly:
Connectors may only merged together when dry .
Also make sure that a gap-free connection is pos-
sible .
In order not to exceed the max . system voltage at
-10 °C, the 54 cell Excellent modules must not be
connected in series with more than 24 modules .
With the Professional modules, max . 22 modules
may be connected in series . Additionally, the re-
quirements of the inverters must be observed .
When connecting the modules in parallel, a cor-
responding overcurrent protection must be used .
This can be achieved with direct current fuses,
which prohibit return currents greater than 12 A .
Furthermore, the connection requirements and de-
sign regulations of the inverter manufacturer must
be observed .
Only use suitable materials:
The system may only be wired using special solar
wires and suitable connectors . It is very important
that all necessary materials are in a flawless elec-
trical and mechanical condition . Only use single
core wires and chose an appropriate conductor
size in order to minimize the voltage drop . For fur-
ther connections of the modules only appropriate
cables with a minimum conductor cross-section of
4 mm² must be used .
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Protect the wires from adverse environmental
effects:
Only use UV-resistant cable ties for the attach-
ment of the wires to the mounting system . Protect
the exposed wire from possible damage, e .g . by
routing it in plastic tubes . Avoid direct exposure to
sunlight .
Under usual and expected conditions, a PV mod-
ule can generate a higher current and/or higher
voltage as stated with the standardized test con-
ditions . To determine the rated voltage values of
components, rated current values of conductors,
fuse values and dimensioning of controls con-
nected to the PV modules, the Isc and Uos values
stated on the module should therefore be multi-
plied with the factor of 1 .25 .