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1. Utilize the high-performance 32-bit or higher microprocessors (MCU) and high-precision AD sampling that feature high per-cycle sampling points and a robust computational capability. 2. The device is incorporated with dedicated chips that ensure core data retention during power loss. After power restoration, the device can resume its reliable operation. 3. The built-in fault-recording function can capture hundreds of cycles of current and voltage waveforms before and after a fault. It is designed with the sequence of events (SOE) recording, with its time stamp accuracy on the millisecond level.