CHARGING STATION
STATUS
Released
DOCUMENT ID.
TBA
REV.
A
LANG.
EN
PAGE
32/37
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Fig. 4-8: Modbus TCP system overview
1 Public power grid
2 Pre-meter fuse (high-capacity fuse, line circuit
breaker, ...)
3 Electricity meter of the network operator
4 Post-meter fuse
5 External meter (house connection meter)
Information
The illustration provides an exemplary system overview and does not include all the necessary ancillary
equipment required for safe operation of the equipment (e.g. line circuit breaker, residual-current
device ...).
Domestic Connection Monitoring
By means of the domestic connection monitoring, the charging vehicle can be dynamically provided with
the respective available charging current, depending on the remaining consumers on the house
connection. This ensures that the domestic connection safety device is not overloaded, and that it is not
always necessary to select a lower charging capacity than would be possible with the vehicle and the
installation.
Via the meter 5, the charging station can read out the entire current energy supply from the power grid.
Based on this information and the value of the post-meter fuse 4 (maximum charging current, which is
specified by the post-meter fuse) defined by DIP switches, the charging station can regulate the
charging current in such a way that the maximum energy reference never exceeds the value of the post-
meter fuse value.