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4000001903/00/04.2020
Device description
3.6 Fuses
Figure 3.7 Fuse
The fuses protect the PV strings against over-current situ-
ations. The PV DC COMBINER BOX is provided with gPV
fuses in accordance with IEC 60269-6:2010.
Each design of combiner box contains the most suitable
fuse rating specially selected for each project, depending
on Isc of PV strings, on voltage rating and on ambient tem-
peratures.
To assure the best performance of the complete solution,
PV DC COMBINER BOX is delivered with fuses, optional
without.
ATTENTION
Material damage!
Only use fuses with silver plated end-caps. If you have to
replace a fuse inside a PV DC COMBINER BOX, use the
same type of fuses delivered with the original combiner
box. Pay special attention to the voltage and current rate
as well as the size and material.
3.7 Terminals
Figure 3.8 Terminals
The fuse holder terminals allow to connect the string ca-
bles safely.
3.8 Conductors
To realise the connections regard the following conductor
specifications:
Stripping length (regard the tolerances below)
18 mm
Clamping range, min. / max.
0.5 mm
2
... 16 mm
2
Wire connection cross section AWG, min. / max.
AWG 20 ... AWG 4
Solid H05(07) V-U, min. / max.
0.5 mm
2
... 16 mm
2
Stranded H07V-R, min. / max.
6 mm
2
... 16 mm
2
Flexible H05(07) V-K, min. / max.
0.5 mm
2
... 16 mm
2
Wire end ferrule with plastic collar, DIN 46228-4, min. / max. 0.5 mm
2
... 16 mm
2
Wire end ferrule, DIN 46228-1, min. / max.
0.5 mm
2
... 16 mm
2
Plug gauge acc. to EN 60999 a x b; Ø
5.3 mm (B6)
Conductor cross section
Tolerance of stripping length
< 4 mm
2
± 1 mm
6 – 10 mm
2
± 1.5 mm
> 16 mm
2
± 2 mm
In order to assure a reliable connection we re-
commend to use appropriate crimping tools, as
an example PZ 10 HEX (Order No.1445070000).
Please check the
Weidmüller product catalogue
to select the appropriate tool.
3.9 Input terminals
A
B
Figure 3.9 Cable glands (A) and WMC 4 connectors (B)
The PV DC COMBINER BOX is equipped either with cable
glands or with special photovoltaic connectors WMC 4.
The WMC 4 connectors reduce the installation time as well
as the maintenance time. They fulfilll the DIN EN 50521
and are TÜV certified.
The cost-efficient cable glands on the other hand allow the
installer to adjust the necessary number of cables even in
the field.
Summary of Contents for PV DC COMBINER BOX
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