Wiring Of Ac Combiner Boxes; Inserting Dc Fuses - Weidmuller Annex Bedienungsanleitung

4.2.5. Wiring of AC combiner boxes

Requirement
• The AC main lines/AC feeder cables must be isolated and de-energized. In general,
isolation can be achieved by switching off the inverter and opening the main AC
switch further downstream.
WARNING
Risk to life as a result of arcing and electric shock.
The AC main lines/AC feeder cables must only be connected when the
power supply is disconnected! Failure to do so will result in a risk to life
from arcing and electric shock.
Procedure
1 Run the AC main lines/AC feeder cables through the cable glands into the interior of
the enclosure.
2 Connect the DC main lines/DC feeder cables direct to the stud terminals. Make sure
you connect the AC main lines/AC feeder cables to the right phase, neutral, earth
terminal.
3 Tighten the cable glands.
4 Check the tightening torques of the connections Check the component in the
electrical drawing provided with the combiner box.
5 Make sure there is sufficient strain relief for the AC main lines/AC feeder cables.
6 Close all unused cable glands with blanking plugs to prevent moisture penetrating the
combiner box.

4.2.6. Inserting DC fuses

When the PV fuses are inserted, the DC voltage is connected to the system if the string
is connected. For this reason, make sure all installation work has been completed.
Procedure
1 Before inserting PV fuses, determine the voltage, polarity and absence of ground
faults of the string inputs.
2 Insert the PV fuses/neutral links.
3 Connect the inverter to the system on completion of all installation and connection
work.
Order Number: 7791700275 · Ed. 4 · 04-2016
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