RONS accurately captures all the details of nanosecond level peak overvoltage, and is a microscope and magnifying glass for transient overvoltage. The RONS peak overvoltage nanosecond level recording analyzer has three major functions: monitoring, recording, and analysis. RONS has a high sampling frequency of 20MHz and can monitor the voltage and current of the system in real-time online. It can record the voltage and current fault waveforms of the system for a long time.