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3 Device description
Figure 3.1 Product range
3.1 Product overview
PV AC combiner boxes are a complete range of tai-
lor-made solutions for utility-scale photovoltaic systems
designed with string inverters. The combiner boxes are in-
stalled to connect, gather, collect and protect the AC cable
outputs of various string inverters.
The
product range offers solutions from
2 to 6 inputs and
1 output, depending on various plant designs. Input of this
product ranges from 400 V to a maximum input voltage of
800 V per string inverter.
The necessary AC inverter outputs are to be connected
at the PV AC combiner box inputs whereas one AC main
cable will be at the output side of the combiner box as a
result of inverters recombination.
Parameters influencing the selection of the optimal
PV AC combiner box
– Ambient temperature
– Degree of protection needed
– Rated AC voltage of the string inverter
– Rated current of the string inverter
– AC earthing system
– Number of inputs
– Number of outputs
– Over-current protection (
fuse links and fuse holders
)
– Need of surge protection (Type I + II SPD)
– Energy meter (optional)
