Combiner Boxes and Solutions for
Photovoltaic Systems
Weidmuller Combiner Box Part Numbering
Part Number Configurator
Family
Enclosure
PVDC
Painted Steel=N3R
Voltage
Number
of Strings
DC
Disconnect
Surge*
Current
Monitoring†
Breather
Drain
600V DC
1000V DC
4-32
Yes=D
No=N
Yes=S
No=N
Yes=M
No=N
Yes=B
No=N
Voltage
Number
of Strings
DC
Disconnect
Surge*
Current
Monitoring†
Breather
Drain
Fiberglass=N4X
Stainless Steel=S4X
Examples
Model number
Enclosure
PVDCN4X-600-08-D-N-N-B
Fiberglass NEMA4X
600V DC
8
Yes
No
No
Yes
PVDCN4X-1000-08-D-S-N-N
Fiberglass NEMA4X
1000V DC
8
Yes
Yes
No
No
PVDCN4X-600-16-D-S-N-N
Fiberglass NEMA4X
600V DC
16
Yes
Yes
No
No
PVDCN4X-1000-16-D-S-M-N
Fiberglass NEMA4X
1000V DC
16
Yes
Yes
Yes
No
Painted Steel NEMA3R
600V DC
24
No
No
No
No
PVDCN3R-600-24-N-N-N-N
PVDCN4X-1000-24-D-S-M-N
PVDCN3R-600-32-N-N-N-B
PVDCS4X-1000-32-D-S-M-B
Fiberglass NEMA4X
1000V DC
24
Yes
Yes
Yes
No
Painted Steel NEMA3R
600V DC
32
No
No
No
Yes
Stainless Steel NEMA4X
1000V DC
32
Yes
Yes
Yes
Yes
All combiner boxes feature Weidmuller fuse holders for each positive input. Fuse holders are rated to a maximum of 1000V DC and 30A DC.
*Surge is based on UL1449 Ed 3, 40kA total discharge (8/20 us), 30kA/600V DC Interrupt rating.
†Current Monitoring is provided at the string level and includes installation and power source.
Only a handful of examples are listed. Custom engineered combiner boxes are available.
Please contact your Weidmuller representative for design assistance.
Fast and Flexible – The Solution for
Commercial and Industrial Installations
A combiner box makes a major contribution to ensuring a
photovoltaic system is efficient and fault-free. Weidmuller
offers combiner boxes that are pre-wired with surge protection
devices to safeguard components downstream. Weidmuller
also offers combiner boxes with external disconnect switches,
and optimization of the combiner box for load isolation and
string monitoring.
Safety and system availability
In a photovoltaic system, the individual input wires or circuits
are consolidated in series into “strings”. The strings connect via
combiner boxes, which are fitted between several arrays or solar
panels and the inverter. The combined input circuits mean fewer
output circuits, which are also fed into combiner boxes, and
eventually result in one main DC buss or feed. The DC buss then
carries the combined electricity to the inverter, ultimately saving
labor and material costs.
16-string combiner box with surge
protection and disconnect
Standard 8-string
combiner box
Combiner Boxes and Components
Surge protection
- for photovoltaic systems
-for data and communication devices
Local
disconnect
switch
NEMA 4X/IP66
enclosure
Fuse
holders
Pre-wired
combiner boxes
Rugged
high-power
output lugs
Bussing
system with
safety shields
Other options:
- Wireless communications
- Current monitoring
- Power supplies
- Cable glands
Combiner Boxes are designed and built to minimize system
costs by providing maximum flexibility. Solar Combiner Solutions
are available in durable metal or nonmetallic IP66 enclosures,
engineered and manufactured to perform in the harshest
environmental conditions.
Fuse-holder terminals
and terminal blocks
Terminals for use in
the PV area have
passed insulation
tests that ensure the
terminals can withstand
1000V DC under all
climatic conditions.
Solutions for all requirements
Let Weidmuller custom fit a combiner box with safety and
performance as you define it, and let us provide the finished
product. Expand your capacity using our expertise with Weidmuller
high-quality products designed specifically for the solar industry.
%
Worldwide
certifications
•UL 1741 file
E325786
•CSA C22.2 No.107.1
•CE
•TUV
•ETL
Surge protection
The surge protection
with pluggable highpower varistors can be
used in voltage ranges
up to 1000V DC and
therefore meets the
higher demands of
photovoltaic systems.
String performance
monitoring
The Transclinic String
monitoring system
for photovoltaic plants
allows precise
measurement of
string current, string
voltage and temperature
in real time.
Wireless monitoring
Monitor or control
your entire system
quickly and without
wiring costs, up to
a 20-mile range.
Wireless Ethernet and
I/O capabilities.
Power supplies
Power your current
monitoring devices and
network equipment with
these highly efficient,
slim-sized units.
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Weidmuller, Canada
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Weidmuller, United States
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Telephone: (800) 268-4080
Facsimile: (877) 300-5635
Email: info1@weidmuller.ca
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Telephone: (800) 849-9343
Facsimile: (804) 379-2593
Email: info@weidmuller.com
Website: www.weidmuller.com
www.weidmuller.com
Weidmuller is the leading manufacturer
of components for electrical connection
technology to transmit energy,
signals and data. The Weidmuller
product portfolio ranges from terminal
blocks, PCB connectors and terminals,
protected c­ omponents, Industrial
Ethernet components, I/O components
and relay sockets to power supplies and
over-voltage protection ­modules
suitable for all applications. Assemble
Services, marking solutions with a
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10/12 • XM • LIT1211