Connecting Dc String Cables - Weidmuller Annex Bedienungsanleitung

4.2.4. Connecting DC string cables

The DC string cables are connected direct to the fuse-disconnectors or WDU/WFF
terminals. The DC string cables must be run into the enclosure interior through a sealed
bushing.
Requirement
• The DC string cables must be isolated and de-energized.
• The cable tightening torques can be found in the annex. Check the terminal in the
electrical drawing provided with the combiner box.
WARNING
Risk to life as a result of arcing and electric shock.
The DC string 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 DC string cables through the cable glands into the interior of the enclosure.
2 Connect the DC string cables direct to the fuse-disconnectors.
3 Tighten the cable glands. The correct tightening torques can be found in the annex.
4 Check the tightening torques of the connections. The correct tightening torques can
be found in the annex.
5 Check the DC string cables for voltage and polarity.
6 Close all unused cable glands with blanking plugs to prevent moisture penetrating the
combiner box.
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Order Number: 7791700275 · Ed. 4 · 04-2016