REFUSOL 20K-2T, Руководство по эксплуатации

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Technical Description 14
Connection Requirements
REFUsol 20K...33K-2T
982079 | 05 | 2021-03
3.3 Connection Requirements
The following points are to be considered when
planning the infrastructure:
∘ The
REFUsol 20K...33K-2T
can feed into the low-volt -
age grid and the medium-voltage grid.
∘ The power supply line must be equipped with an ap -
propriate AC disconnecting device.
∘ The
REFUsol 20K...33K-2T
is not equipped with inter -
nal potential isolation.
∘ If connected with the medium-voltage-grid, it must
be operated with electrically isolating transform
-
ers.
∘ The transfomer must be selected according to the
specific site of use and the relevant regulations
must be taken into account: Hazardous substances
ordinance, ordinance on installations for handling
substances hazardous to water, chemicals prohibi
-
tion ordinance, technical instructions for noise pro -
tection, and regional building regulations.
∘ The
REFUsol 20K...33K-2T
has 2 independent MPP
trackers. All PV modules connected to the same
MPPT should be of the same type and have the same
orientation.
∘ When planning the system, selecting operating
equipment, installation, commissioning and com
-
Additional required
equipment at low voltage
network
at medium
voltage net
-
work
DC load break switch integrated
1)
1)
Local regulation might require an additional DC switch at a external DC
combiner box.
integrated
1)
AC load break switch necessary necessary
Central grid protec -
tion device with sec -
tion switch
(VDE-AR-N 4105,
VDE-AR-N 4110)
necessary necessary
LV-/MV-Transformer not necessary necessary
Specification of medium voltage transformer
Mains transformer according to EN 50588-1
Switching group
Dyn5 or Dyn11