Designed to prevent dangerous thermal events on PV arrays, UL 1699B recognized PVAF Series detects arcs while minimizing nuisance trips by identifying electrical noise signature created by arc faults in array wiring. Each device monitors up to 4 PV strings by itself, and multiple PVAFs can run in parallel to monitor more strings or whole combiner box. Available in configurations powered with 12 or 24 Vdc, PVAF Series monitors strings up to 15 A at 1,000 V or combined lines up to 40 A at 1,000 V.
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