The Weidmüller generator junction box, model 2791940000, is designed for connecting and protecting electrical circuits in photovoltaic systems. It features robust construction suitable for outdoor installations and ensures reliable operation in challenging environments. Typical applications include solar power generation and distribution systems, enhancing the safety and efficiency of connections.
| Type |
Generator junction box |
| Material |
Plastic |
| Colour |
White |
| Dimensions |
(W x H x D) 200 x 240 x 132 mm |
| Ambient temperature |
-40 °C…50°C |
| Amount of maximum power points |
1 |
| Category type 1 |
false |
| Category type 2 |
true |
| Category type 3 |
false |
| Color |
Blacknull |
| Connection type string |
Plug WM4C |
| DC Input + & - |
Wire connection |
| DC Output + & - |
Wire connection |
| Degree of protection (IP) |
IP65 |
| Depth |
132 |
| Depth (inches) |
5.1968 inch |
| Discharge current In (8/20 µs) |
20 kA |
| Discharge current, max. (8/20 µs) |
40 kA |
| ECLASS 14 |
22-57-02-92 |
| ECLASS 15.0 |
22-57-02-92 |
| Enclosure attachment |
Via mounting foots |
| Enclosure Height |
240mm |
| Enclosure Width |
200mm |
| Equipped with switch disconnector |
false |
| ETIM 10 |
EC003857 |
| ETIM 8.0 |
EC003857 |
| ETIM 9.0 |
EC003857 |
| Functional earth connector |
Cable entry |
| Fuse Type |
Neither fuse cartridge nor holder |
| Fuses |
No |
| GTIN (EAN) |
4064675072980 |
| Height |
234 |
| Height (inches) |
9.2126 inch |
| Humidity |
5...95 %, no condensation |
| Impact resistance |
IK08 in accordance |
| Impact strength |
IK08 |
| Included accessories |
Article |
| Installation location |
Protected outdoor area |
| Insulating material |
Polycarbonate, Polyester |
| Long specification |
Combiner box for inverters |
| Max. input current per string |
30 |
| Max. input voltage DC |
1100 |
| Max. number of DC inputs |
per Maximum Power Point 2 inputs connected in parallel |
| Max. number of DC outputs |
per Maximum Power Point 1 output |
| Max. output current |
0 |
| Net weight |
1630g |
| Number of cable |
1 |
| Number of conduit inlets |
2 |
| Number of Inputs |
2 |
| Number of Poles |
7poles |
| Number of string inputs |
2 |
| Number of string inputs per MPP |
= 2 |
| Pitch |
3.81mm |
| Plugging angle |
90degrees |
| Product information |
The SCIP number was assigned due to a lead content of more than 0.1 % of the net weight. |
| Protection Class |
II |
| Protection degree |
IP65 |
| Protection level Up (-/PE) |
= 3.8 kV |
| Protection level Up (+/-) |
= 3.8 kV |
| Protection level Up (+/PE) |
= 3.8 kV |
| PV system voltage, max. Ucpv |
1100 V |
| Quantity |
4 |
| Rated current |
17.5A |
| Rated DC current per connection |
Current per string, max. |
| Rated DC voltage |
1100 V |
| Rated short-term current resistance |
Rated current |
| Rated voltage (III/2) |
160V |
| REACH SVHC |
Lead 7439-92-1 |
| Requirements class |
Type II |
| ROHS |
Conform |
| RoHS Compliance Status |
Compliant |
| SCIP |
bdab5698-6a20-4370-8e28-8810d882d01a |
| Short-circuit curent ISCPV |
11000 A |
| Solder pin length |
3.2mm |
| Standards |
EN 61643-31 |
| Surge protection auxiliary contact |
Cable entry |
| Switch disconnector execution |
no switch |
| Time interval |
5 years |
| Type of connection |
WM4C plug-in |
| Type of inlet |
Other |
| Type of mounting |
Wall mounting, 4 screws |
| Version |
Photovoltaics, Combiner Box, PV Next, 1100 V, 1 |
| Voltage type |
DC |
| Width |
200 |
| Width (inches) |
7.874 inch |
| Wire connection |
Type of connection |
| Working temperature |
-40 - 50 |
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