Requirements For The Infrastructure - REFU REFUsol 50K-3T Bedienungsanleitung

3.3

Requirements for the Infrastructure

Additional required at low voltage
equipment network
DC load break switch
integrated
AC load break switch necessary
Central grid protec- necessary
tion device with sec-
tion switch
(VDE-AR-N 4105,
VDE-AR-N 4110)
LV-/MV-Transformer not necessary
1)
Local regulation might require an additional DC switch at a external DC
combiner box.
The following points are to be considered when
planning the infrastructure:
∘ The REFUsol 50K-3T can feed into the low-voltage
grid and the medium-voltage grid.
∘ The power supply line must be equipped with an ap-
propriate AC disconnecting device.
14 Technical Description
Requirements for the Infrastructure
at medium
voltage net-
work
1) 1)
integrated
necessary
necessary
necessary
∘ The REFUsol 50K-3T is not equipped with internal po-
tential 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.
Specification of medium voltage transformer
Mains transformer according to EN 50588-1
Switching group
∘ The REFUsol 50K-3T has 3 independent MPP track-
ers. All PV modules connected to the same MPPT
should be of the same type and have the same ori-
entation.
∘ When planning the system, selecting operating
equipment, installation, commissioning and com-
Dyn5 or Dyn11
REFUsol 50K-3T
982081 | 03 | 2021-03