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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
• The number of poles for the isolating switch includes: single-phase, two-pole, three-pole, and four-pole.
• This isolating switch is designed for rail-mounted installation (can be installed on a mounting rail).
• Power Frequency Withstand Voltage: After undergoing damp heat resistance testing, the isolating switch must withstand a power frequency voltage of 1890V for 1 minute without flashover or puncture.
• It can withstand more than 2000 operating cycles at the rated current.
• Pollution Degree: 3
• Utilization Category: AC-22A
| Rated Voltage (V) | 1P 230/400V,2P,3P,4P 400V | ||||||||
| Rated Current (A) | 10,16,20,25,32,40,,50,63,80,100,125 | ||||||||
| Rated Making and Breaking Capacity | 1.05Ue,3Ie cos φ =0.65 | ||||||||
| Rated Short-time Withstand Current (A) | 20Ie,t=1s | ||||||||
| Rated Short-circuit Making Capacity | 20Ie,t≥1s cos φ =0.9 | ||||||||
| Rated current and conductor cross-sectional area | |||||||||
| Rated Current | 10 | 16 20 |
25 | 32 | 40 50 |
63 | 80 | 100 | 125 |
| Conductor Cross-sectional Area (mm²) | 1.5 | 2.5 | 4 | 6 | 10 | 16 | 25 | 35 | 50 |
| Terminal Tightening Torque (N·m) | Screw: M6, tightening torque 2.0–3.5 N·m for both power supply and load sides. |
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