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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
• Quickly dissipate heat and reduce the service temperature
• Plug-in clips, Easy module replacement
• Flash Barrier, Prevent arc propagation in current impact
• Use a suitable electrical insulator to keep a 10mm min.safety distance from
the PV-SPD and other grounfed parts in the housing
• The green and red visual indicator flags show the module protective status
(green = good, red = replace)
• Features visual indication and optional remote contact signaling
(floating changeover contact)
• Feature a combined disconnection
• Short-circuiting (shunting) device with safe electrical isolation to Prevent fire damage due to DC arcs.
| IEC ELECTRICAL | ||||
| Maximum Continuous Operating DC Voltage | (DC+)- PE, (DC-)- PE, (DC+)- (DC-) | UCPV | 1200V | 1500V |
| Nominal Discharge Current (8/20us) | In | 40A | ||
| lmpulse Discharge Curent (10/350 us) | Iimp | 6.25kA | ||
| Total Discharge Current (10/350ys) | ITotal | 12.5kA | ||
| Total Discharge Current (8/20 us) | ITotal | 20kA | ||
| Maximum Discharge Current (8/20 1s) | Imax | 40kA | ||
| Voltage Protection Level | (DC+)- PE, (DC-)- PE, (DC+)- (DC-) | Up | ≤4400V | ≤5200V |
| Response Time | TA | <25ns | ||
| ShortCircuit Current Rating | ISCPV | 2000A | ||
| Number of Ports | 1 | |||
| MECHANICAL & ENVIRONMENTAL | ||||
| Operating Temperature Range | Ta | -40°F to +158 °F [-40℃ to +70℃] | ||
| Permissible Operating Humidity RH | RH | 5%...95% | ||
| Atmospheric pressure and altitude | 80k Pa ... 106k Pa /－500 m... 2000 m | |||
| Terminal Screw Torque Mmax | Imax | 39.9 lbf-in [4.5 Nm] | ||
| Conductor Cross Section (max) | 2 AWG (Solid, Stranded)/4 AWG (Flexible) 35mm² (Solid, Stranded)/25mm² (Flexible) |
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| Mounting | 35 mm DIN Rail, EN 60715 | |||
| Degree of Protection | IP20 (built-in) | |||
| Housing Material | Thermoplastic: Extinguishing Degree UL 94 V-0 | |||
| Thermal Protection | Yes | |||
| Operating State / Fault Indication | Green ok / Red defect | |||
| Remote Contacts (RC) | Option | |||
| RC Switching Capacity | AC: 250V / 0.5 A; DC: 250V/0.1 A; 125V / 0.2 A; 75V / 0.5A | |||
| RC Conductor Cross Section (max) | 16 AWG (Solid) / 1.5mm²(Solid) | |||
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