User Documentation

352690250000/03/09.2020
Product description
3.2 Enclosure
Figure 3.4 Enclosure (example)
The enclosure base part of the PV Next String Combiner
Box is made of glass-bre reinforced polyester (GFRP),
the transparent cover is made of polycarbonate. The en-
closure corresponds with protection class IP65 (according
to IEC 60529). The label with warning symbols must be
legible at all times.
3.3 Switch-disconnector (optional)
Figure 3.5 Switch-disconnector
The making and breaking capacity of the switch-disconnec-
tor (according to the IEC 60947-3) has been selected to
assure that it can switch the circuit at full load at the maxi-
mum operating temperature.
3.4 Connections
BA
Figure 3.6 Cable glands (A) and PV connectors (B)
The PV Next String Combiner Box is equipped with cable
glands (A) and optionally with PV connectors (B).
PV connectors reduce installation and maintenance
time. The connectors meet the requirements of the
DIN EN 50521 standard.
3.5 SL SET PV next seal set
The combiner box is supplied with one bag per PCB/
MPPT containing the SL SET PV next seal set (Or-
der No. 2729230000). enthalten. The seal set consists of
the following pats:
– 4 x multiple sealing insert 3 x 7,0 mm
– 8 x blind pin Ø 7 x 28 mm
– 2 x reducing sealing insert 9 – 16 mm
3.6 Surge protection device
Figure 3.7 Surge protection device
The surge protection device complies with IEC 61643-32
Type I+II or Type II.
3.7 PCB terminals
Figure 3.8 PCB terminal with PUSH IN function
The PUSH IN PCB terminals enable faster and safer con-
nection of the DC cables and require no maintenance. We
recommend using a slotted screwdriver 0.8 mm x 4 mm
(Weidmüller Order No. 9008340000) to operate the pusher.