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- W2170901722 abstract "To improve fire safety in PV systems, Article 690.11 of the 2011 National Electrical Code (NEC) requires photovoltaic (PV) systems above 80 V on or penetrating a building to include a listed arc-fault protection device. Many arc-fault circuit interrupter (AFCI) devices are currently being listed and entering the market. Depending on the manufacturer, AFCIs are being deployed at the module-level, string-level, or array-level. Each arc-fault protection scheme has a different cost and arc-fault isolation capability. Module-level and string-level AFCI devices tout the ability to isolate the fault, identify the failed PV component, and minimize the power loss by selectively de-energizing a portion of the array. However, these benefits are negated if the arcing noise-typically used for arc-fault detection-propagates to parallel, unfaulted strings and cause additional AFCI devices on the PV array to trip. If the arcing signature “crosstalks” from the string with the arc-fault via conduction or RF electromagnetic coupling, the location of the arc-fault cannot be easily determined and safe PV generators will be disconnected. Sandia National Laboratories collaborated with Texas Instruments to perform a series of nuisance trip scenarios with different PV configurations. Experimental results on a 2-string array showed arc detection on the faulted string occurred an average of 19.5 ms before unfaulted string-but in some cases the AFCI on both strings would trip." @default.
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- W2170901722 date "2012-06-01" @default.
- W2170901722 modified "2023-10-16" @default.
- W2170901722 title "Crosstalk nuisance trip testing of photovoltaic DC arc-fault detectors" @default.
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- W2170901722 doi "https://doi.org/10.1109/pvsc.2012.6317857" @default.
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