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Why DC Combiner Box Is Essential for PV Systems
If you're a solar system buyer, installer, or project manager, let's get straight to the point—you're here because you need a definitive answer: Does your solar system really need a DC combiner box? A
• Provides protection against earth fault/leakage current and function of isolation
• High short-circuit current withstand capacity
• Applicable to terminal and pin/fork type busbar connection
• Contact position indication
• Equipped with finger protected connection terminals
• Fire resistant plastic parts endures abnormal heating and strong impact
• Automatically disconnect the circuit when earth fault/ leakage currento
• When it occurs and exceeds the rated sensitivity.
• Independent of power supply and line voltage,and free from external interference, voltage fluctuation
| Number of pole | 2P | 4P |
| Rated voltage | AC230(240) | AC400(415) |
| Rated current | 16A,20A,25A,32A,40A,50A,63A | |
| Rated frequency | 50/60Hz | |
| Module size | 36mm | |
| Circuit type | AC type,A type, B type | |
| Rated residual operating current lΔn(A) | 0.03,0.1,0.3,0.5 | |
| Rated residual non operating current lΔno | 0.5 IΔn | |
| Rated conditional short-circuit current Inc | 6kA | |
| Rated conditional residual short-circuit Current lΔc | 6kA | |
| Tripping duration | instantaneous tripping<0.3s(0.1) | |
| Residual tripping current range | 0.5lΔn-lΔn | |
| Terminal Connection Height | 21mm | |
| Electro-mechanical endurance | 4000 cycles | |
| Connection capacity | Rigid conductor 25mm2 | |
| Connection terminal | Screw terminal,Pillar terminal with clamp | |
| Fastening torque | 2.0Nm | |
| lnstallation | On symmetrical DIN rail 35mm Panel mounting | |
| Protection class | IP20 | |
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