The exact extract asks how quickly Huawei inverter AI intelligent arc protection automatically cuts off an arc in an emergency. The correct answer is A. 0.5. Arc faults are one of the most serious DC-side safety risks in PV systems because they can generate high temperature, damage insulation, and create fire hazards. Huawei AFCI and intelligent arc-protection functions are designed to detect abnormal arc signatures and shut down the affected circuit rapidly. The training value given in the question is 0.5 seconds, which matches the broader Huawei safety positioning around fast arc detection and shutdown. The other options—1 second, 1.5 seconds, and 2 seconds—are slower and do not match the exam extract. This item belongs to C&I Smart PV safety because commercial rooftops and distributed PV plants require fast active protection to reduce fire risk and improve building safety. Reference: Huawei HCSA-Sales-Smart PV V2.0 C&I Solution active safety training extract.
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