Weidmüller PV DC COMBINER BOX, Operating Instructions Manual

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3 Device description
Figure 3.1 Product range
3.1 Product overview
PV DC COMBINER BOX is a complete range of tai-
lor-made Level 1 combiner boxes for utility-scale photovol-
taic systems. The combiner boxes are installed to join and
protect the DC strings that go from the PV panels to the
solar inverter.
The PV DC COMBINER BOX product range offers solu -
tions from 8 to 32 inputs and 1 or 2 outputs. These can
be designed for systems with string voltage of 1000 or
1500 V DC.
The necessary string cables (+ and -) are to be connected
at the inputs whereas one or two DC+ and DC- main ca-
bles will be at the output side. The output cables must be
connected to a Level 2 combiner box, which will join DC+
and DC- from other Level 1 combiner boxes, or directly to
the solar inverter.
Parameters influencing the selection of the optimal
PV DC COMBINER BOX
– Ambient temperature
– Degree of protection needed
– DC voltage range
– I
SC
of the PV string
– DC earthing system
– Number of inputs
– Number of outputs
– Fuses in one or both poles (by default in both poles)
– Type of surge protection (by default Type II SPD)
– Type of input terminals (by default multivia cable glands)
– String monitoring (if yes: single or pair monitoring)