User manual

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The DC connection and supply must be designed for the maximum input current
of the DC-AC converter (see technical data).
As high currents flow through the connection cables when operating the DC-AC converter (see technical
data), the connection cables must be dimensioned accordingly.
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The thicker and shorter the connection cable, the lower the voltage drop in the cable.
A high voltage drop may lead to undervoltage of the DC-AC converter, although the battery provides suf-
ficient supply voltage. Therefore, it is important to keep the connection cable as short as possible.
The devices require at least the following cable cross sections:
Cable cross section at Cable cross section at
Cable length up to 2 m Cable length up to 3 m
SWD-300 16 mm
2
16 mm
2
SWD-600 16 mm
2
16 mm
2
SWD-1200 25 mm
2
35 mm
2
SWD-2000 35 mm
2
50 mm
2
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We urgently recommend securing the connection cable with a separate fuse close to the
battery to prevent damage to the battery through short-circuits of the connection cables
(worn cables, etc.). The fuse must be designed for the max. DC input current of the DC-
AC converter.
Due to the high currents, you have to ensure an impeccable connection of the connection cables with the
battery and the DC-AC converter.
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We recommend only using the optional connection cables.
Prior to attaching the DC-AC converter to the battery voltage, turn it off. For this, put the switch (11) in
the”0” position (Off).
The converter is connected to the supply voltage via the two input clamps (2 and 3). The plus pole of the
battery must be connected to the input clamp “+“ (3), the minus pole of the battery to the input clamp “-” (2).
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Always ensure a tight and safe connection of the connection cables to the bat-
tery as well as the DC-AC converter. A bad connection leads to high transition
resistance and results in overheating.