Solar distribution board PNI CBT-3 DC + AC for three-phase system, 4 strings, IP65
Code: PNI-CBT-3Product detailed description
PNI CBT-3 is a metal distribution box that combines protection and disconnection for the direct current (DC) and alternating current (AC) side of a three-phase photovoltaic system in one housing. It helps you to run fewer cables directly from the panels to the inverter, making the installation more organized and easier to maintain.
On the DC side, up to 4 panel strings can be connected, each with a current up to 15 A, and the distribution box combines them into one output with a current up to 60 A. Overvoltage protection is available on both the DC and AC sides. The AC side is designed for three-phase voltage 380 – 440 V and a current up to 63 A.
The enclosure is metal and has an IP65 rating, making it suitable for outdoor use. Natural cooling is provided by the metal housing itself, without the need for a fan.
Installation and Connection
The dimensions are approximately 440 × 380 × 170 mm and the weight is about 10 kg. It can be mounted on a wall; the packaging includes mounting material and keys as shown in the images. Conductor cross-sections: 4 mm² for each string input, 12 mm² for the DC output, 10 mm² for the AC side, and 6 mm² for grounding.
Important: the distribution box operates with high direct current voltage and grid voltage. Connecting to the grid, connecting the panels, and commissioning must be carried out by a qualified electrician with an inspection for the PV system.
Frequently Asked Questions
How many panel strings can be connected?
Four, each with a current up to 15 A and a voltage up to 1000 V.
Is there overvoltage protection in the distribution box?
Yes, one on the DC side and one on the AC side.
Can it be placed outdoors?
Yes, the IP65 rating and metal enclosure allow this, with an operating temperature range of −20 to +50 °C.
Technical Specifications
| Brand | PNI |
| Manufacturer Code | PNI-CBT-3 |
| EAN | 5949066525643 |
| Type | Solar distribution box DC + AC for three-phase system |
| DC Inputs (strings) | 4 pairs (+/−) |
| Max. input current per string | 15 A |
| Input conductor cross-section | 4 mm² |
| Max. input DC voltage | 1000 V |
| DC Output | 1 pair (+/−), cross-section 12 mm² |
| Max. DC output current | 60 A |
| DC tripping current | 63 A |
| DC overvoltage protection | yes, 1 piece (1000 V) |
| Alternating current side (AC) | three-phase, 380–440 V |
| Max. AC current | 63 A |
| AC conductor cross-section / grounding | 10 mm² / 6 mm² |
| AC overvoltage protection | yes, 1 piece |
| Protection rating | IP65 |
| Operating temperature | −20 °C to +50 °C |
| Cooling | natural (metal enclosure) |
| Dimensions | approx. 440 × 380 × 170 mm |
| Weight | approx. 10 kg |
| Package contents | distribution box with mounting material and keys (as shown in the images) |
| Warranty | 24 months |
| Country of origin | China |
Additional parameters
| Category: | Photovoltaics and Solar Lighting |
|---|---|
| Warranty: | 2 years |
| Weight: | 11.127 kg |
| EAN: | 5949066525643 |
| Brand: | PNI |
| Manufacturer code: | PNI-CBT-3 |
| EAN: | 5949066525643 |
| Type: | DC + AC solar combiner box for a three-phase system |
| DC inputs (strings): | 4 pairs (+/−) |
| Max. input current per string: | 15 A |
| Input conductor cross-section: | 4 mm² |
| Max. DC input voltage: | 1000 V |
| DC output: | 1 pair (+/−), cross-section 12 mm² |
| Max. DC output current: | 60 A |
| DC breaking current: | 63 A |
| DC surge protection: | yes, 1 pc (1000 V) |
| AC side: | three-phase, 380–440 V |
| Max. AC current: | 63 A |
| AC conductor / earthing cross-section: | 10 mm² / 6 mm² |
| AC surge protection: | yes, 1 pc |
| Ingress protection: | IP65 |
| Operating temperature: | −20 °C to +50 °C |
| Cooling: | natural (metal cabinet) |
| Dimensions: | approx. 440 × 380 × 170 mm |
| Weight: | approx. 10 kg |
| Package contents: | box with mounting hardware and keys (as shown in the photos) |
| Warranty: | 24 months |
| Country of origin: | China |
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