User Documentation

312690250000/03/09.2020
max. 3 strings
on 1 MPPT
max. 3 strings
on 1 MPPT
max. 6 strings
on 2 MPPTs
max. 6 strings
on 2 MPPTs
max. 9 strings
on 3 MPPTs
Figure 3.1 Overview of the variants (only models with PV-connectors shown, without optional switches or cable glands)
3.1 Product overview
The Weidmüller PV Next String Combiner Boxes are stand-
ardised string combiners with which photovoltaic string
cables in private or commercial PV systems can be con-
nected safely and easily to the inverters.
The product family is comprised of three power variants
without string protection and two power variants with string
protection (gPV fuse links) to protect against impermissibly
high return currents.
Depending on the design of the PV system, up to six elec-
trically isolated Maximum Power Point Trackers (MPPT)
can be connected.
Per MPPT, each PV Next String Combiner Box contains a
replaceable DC surge protection of type I/II or type II. The
boxes are optionally equipped with a switch-disconnector.
The connections to string cables and inverters are made
either with PV connectors on the underside of the enclo-
sure or via a direct connection within the enclosure.
The type designation of your product can be found on the
type plate inside the enclosure.
3 Product description