Plant Layout - Kaco Blueplanet 87.0 TL3 Series Manual

3.3

Plant layout

PV generator
String combiner with
DC isolator switch
Fig. 6: Circuit diagram with a short or long supply cable to the inverter
Fig. 7: Circuit diagram from the grid connection point to the inverter
Legend
PV generator
String combiner
Switch box
Inverter with circuit-breaker
Transformer
Grid connection point
KACO blueplanet 87.0 TL3 KACO blueplanet 92.0 TL3 KACO blueplanet 110 TL3 KACO blueplanet 125 TL3
KACO blueplanet 137 TL3 KACO blueplanet 150 TL3
PV generator
RS485
*
Switch box
Grid connection point
Transf.
P
XFMR MV/LV
S
Definition / Information about the connection
The PV generator converts the radiant energy of sunlight
into electrical energy.
A string combiner can be coupled to the KACO device so
that the DC lines can be combined.
*) If the supply cable from the PV generator to the device is
long, the string combiner can also be installed in the vicinity
of the PV generator.
An integrated DC isolator switch enables disconnection on
the DC-side.
A switch box with integrated DC isolator switch enables dis-
connection from the inverter on the DC-side.
The PV generator is connected to the device's DC connec-
tion.
All three phases need to be set up on the medium-voltage
transformer or medium-voltage/high-voltage transformer.
In this case, the total impedance of the transformer stations
must be below 25%.
The clean PV-current is made available at the grid connec-
tion point.
String combiner with
DC isolator switch
Inverter
with circuit-breaker
AC
Inverter
with circuit-breaker
AC
Equivalent mains
impedance up to 25%
Inverter
with circuit-breaker
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