Mains Connection - Lenze i550 Series Project Planning Manual

Information on electrical installation

Mains connection

Mains connection
The following should be considered for the mains connection of inverters:
Single inverters are either directly connected to the AC system or via upstream filters. RFI fil-
ters are already integrated in many inverters. Depending on the requirements, mains chokes
or mains filters can be used.
Inverter groups are connected to the DC system with the DC bus. For this purpose, the inver-
ters have to be provided with a connection for the DC bus, e. g. terminals +UG/-UG.
This enables the energy exchange in phases with operation in generator and motor mode of
several drives in the network.
The DC system can be provided by power supply modules (AC/DC converters) or inverters with
a power reserve.
The technical data informs about the possible applications in the given groups. In the dimen-
sioning, data and further notes have to be observed.
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