Weidmüller PV DC COMBINER BOX, Operating Instructions Manual

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Installation
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5.5 Inserting the fuses
For each string voltage (1000 V DC and 1500 V DC) there
are two types of fuse holders that can be used in the
PV DC COMBINER BOX:
– for 1000 V
– for 1500 V
WARNING
Do not operate under load.
A serious damage on persons and equipment
can occur by high voltage.
► Ensure that there is no current flowing
through the strings.
► Open the fuses carrier by pulling the fuse holder handle.
► Insert the fuse link laterally into the fuse holder carrier
and push gently.
► Proceed in this way with all fuses that are to be inserted.
5.6 Connection of the inputs
The enclosure is equipped either with cable glands or with
PV connectors (WM4 C or PV stick).
In order to realise proper connections we recommend to
use wire end ferrules as well as appropriate stripping and
crimping tools.
Input connections via cable glands
Each multivia cable gland has entries for 8 dif-
ferent cables. Pay attention to the string number
as well as the polarity in order to avoid mistakes
during connection.
Make sure that you have the electrical drawing
provided with the combiner box to hand.
► Insert the DC string input cables through the multivia ca-
ble glands into the interior of the enclosure.
► Strip the conductor for 18 mm with an appropriate tool.
► Crimp the conductor with a tubular wire end ferrule with
18 mm length of the sleeve (the conductive part).
► Check the terminal in the electrical drawing and insert
the conductor in the fuse holder connection insert.
► Use an appropriate screw-driver and thighten the screw
with the torque indicated in the product drawing.
► Pull down the cables to assure that all of them are well
connected.
► Make sure there is sufficient strain relief for the DC main
lines and DC string input cables.
► Make sure that the cables are not mounted under me -
chanical load which could create an undesirable force.
► Proceed in this way with all input cables needed.