REFUSOL 40K - Device Description and Specifications; Operating Mode and Infrastructure Needs

14 REFUsol 40K / 46K-MV REFU Elektronik GmbH
3 Description of Device
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3.1 Operating Mode
The REFUsol 40K / 46K-MV transforms the direct current generated by photovoltaic (PV) modules into
alternating current and feeds this into the public grid.
1
3
2
4
5 6
7
2
Figure 1: How it works: a grid-connected PV system with photovoltaic inverter
1 PV modules
2 Solar string combiner box
3 REFUsol 40K / 46K-MV photovoltaic inverter
4 Fuse switch disconnector or circuit breaker
5 Grid Protection
6 Isolation transformer is required for medium-voltage network
7 Low or medium-voltage AC grid
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3.2 Infastructure Requirements
Additional required
equipment
40K at the low voltage
network
40K/46K-MV at the medium voltage
network
DC load break switch integrated* integrated*
AC load break switch necessary necessary
Central grid protection
device (VDE-AR-N 4105)
necessary necessary
LV-/MV-Transformer not necessary necessary
*local regulation might require an additional DC switch at the external DC combiner box.
The following points are to be considered when planning the infrastructure: