What is the reason for replacing smart meters in China Southern Power Grid?

If you are a power customer of Guangdong Power Grid Corporation, in order to ensure the measurement accuracy of the watt-hour meter, the power supply department will replace the watt-hour meter regularly according to the relevant regulations of the state, that is to say, the watt-hour meter will rotate. According to the Technical Management Regulations of Electric Energy Metering Devices (DL/T 448-20 16), power supply enterprises will regularly check the operation quality of electric meters to confirm whether it is necessary to rotate the same batch of electric meters. Power supply enterprises divide the electric energy meters with the same manufacturer, model, order (production) batch and relatively concentrated installation address into several batches for sampling inspection and judgment. If it is judged as a qualified batch, the batch of meters can continue to run, and the operation quality of the batch of meters will be checked two years later; If the batch is judged to be unqualified, replace all the meters in the batch.

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