jaggedben
Senior Member
- Location
- Northern California
- Occupation
- Solar and Energy Storage Installer
2.9 DC Arc-fault Protection
The Standard wire-box inverters include DC Arc-fault detection compliant with UL 1699B. The inverter will detect electrical noise that is indicative of a DC series arc. Upon detection of an arc-fault, the inverter will cease operation.
Is the electrical noise that is indicative of a DC series arc meaningfully different at 1500V vs. 1000V? I mean, presumably the inverter's parts are rated for 1500V, and it just seems to my non-inverter-designer brain like the noise detection method would not need to be different. Like, you're measuring the voltage and current in either case, and your components for doing so are rated for the voltage they'll see. And the brains of the inverter does the analysis.
This might be a little different for a combiner box like the OP asked for, where we're looking for components that are rated for 1500V that go inside an enclosure and there are also independent 'thinking' components for the noise analysis that also need to go in that box and need to be rated for the higher voltage or appropriately isolated or something.