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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
• Standard: IS0 8820-1, IS0 8820-8, JASO D622
• Rated voltage: DC750V
• Rated current: 250A, 300A, 350A, 400A
• Breaking capacity: 20kA
• Protection object: Provide safer and more reliable protection against overload and short-circuit current faults of electric vehicle lithium battery pack, Super-capacitor circuit , charging circuit, DC-DC converter and other devices.
• Applicable environment: Temperature from -35℃ to 85℃, humidity ≤90%
• Material description: 95 alumina high strength ceramics and imported material fuse piece
• Structure process: copper metal is riveted after welding process; The internal quartz sand is processed by solidification to prevent products from falling off in dynamic working conditions and prevent arc spraying which is caused by line faults.
| Product model | Rated current (A) | 1²t (A²s) | Breaking capacity | Power consumption (w) 0.5In |
Mounting bolts/torque | |
| Pre-arc | Fusing | |||||
| SEV35A750-250A | 250 | 23500 | 94500 | 20KA time constant (L/R): 2ms ± 0.5ms |
10.30 | Mounting bolt M10, recommended mounting torque 20N•m |
| SEV35A750-300A | 300 | 30000 | 121000 | 12.40 | ||
| SEV35A750-350A | 350 | 35400 | 135000 | 13.70 | ||
| SEV35A750 400A | 400 | 44200 | 160000 | 16.80 | ||
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