KACO blueplanet 1502x - Manual (Page 9)

blueplanet Installation Instructions 1502x - 5002x Page 9
4 Unit Description
!
CAUTION
Incorrect use is prohibited.
The galvanically isolated blueplanet units are available
with different power ratings. The appropriate inverter
type is selected according to the maximum output of
the photovoltaic modules that have been installed. The
maximum output values can be found in the data sheet
(see Technical Data, section 3).
You can find the name of your inverter on the name
plate on the left side of the inverter.
4.1 Included in box
– blueplanet inverter
– Wall bracket
– Documentation
4.2 Designing the PV array
The selection of the PV array is of great importance
when designing a PV installation. When doing so, you
must ensure that the solar array is compatible with the
inverter.
Observe the data provided in the data sheet (see sec-
tion 3, Technical Data) when designing your solar array.
NOTE
PV-Pilot, a dimensioning program for the easy selec-
tion of PV modules, can be downloaded at no cost at
the following address:
http://www.kaco-newenergy.com
Designing the PV array:
– The number of PV modules connected in series must
be selected in such a way that the output voltage of
the PV generator stays within the permitted input
voltage range of the inverter – even during extreme
outside temperatures. Depending on the way in
which the modules are installed and the geographic
location, a suitable temperature should be used when
calculating the voltage. The temperature coefficients
of the solar modules should be taken into account.
The following criteria must be met for calculating the
voltage of the PV generator:
– U
0
(voltage open circuit) < max. input voltage of the
inverter. Even at very low outside temperatures, the
open circuit voltage of the connected string must lie
within the permitted input voltage range. The open
circuit voltage of the entire string must be less than
the max. input voltage under all conditions.
– U
Mpp
(voltage maximum power point) > min. input
voltage. Even at very high outside temperatures, the
MPP voltage of the connected string should lie within
the permitted input voltage range. The MPP voltage
of the entire string must always be greater than the
lowest MPP voltage of the inverter.
If the MPP voltage moves outside of the permitted input
range, the installation may still appear to function prop-
erly. In this situation, the maximum possible amount of
power is not fed into the grid; instead, a smaller amount
is back fed to the utility grid. The amount of energy fed
into the grid will depend on what point the inverter is
operating on the PV generator Voltage/Current curve.
Provided that the input voltage is within the permitted
input voltage range, the inverter will not be damaged
if a connected PV generator provides current that is
above the max. usable input current.
The solar generator still represents the largest factor
in the cost of a solar installation. For this reason, it is
extremely important to obtain maximum energy yields
from the solar generator. To achieve this, solar genera-
tors in the northern hemisphere should be oriented
to the south at an angle of inclination best suited for
the location. The PV generator should never be shaded.
This orientation is quite often not possible due to
structural reasons. In order to achieve the same energy
yield as an optimally oriented solar generator, the solar
generator power can be increased.
For roofs with an east-west orientation, we recommend
a multi-string PV installation. To achieve an optimum
yield from the installation, half of the strings must be
installed on the east side of the roof; the second half
on the west side.
For exposed locations in mountains or in southern
regions with higher than normal solar radiation, we
recommend that the power generator be reduced
appropriately. Please consult with us or your specialty
dealer about this matter.
4.3 Protection concepts
The following monitoring and protective functions are
integrated into blueplanet inverters:
– Overvoltage conductors/varistors to protect the
power semiconductors from high-energy transients
on the grid side.
– Temperature monitoring of the heat sink.
– EMC filters to protect the inverter from high-fre-
quency line interference.
– PV generator grounded varistors to protect the
inverter against bursts and surge pulses.
– Islanding detection according to IEEE 1547.
– Ground Fault Detector Interrupter (GFDI) according
to NEC 690.5.
Section 4 · Unit Description