Implementation and value analysis of new regulations for refined management of the entire lifecycle of electric energy meters

What are the differences in the service life of electric energy meters between the old and new calibration regulations? The current implementation in China is JJG 596-2012, which will be switched to JJG 596-2026 in late July. The biggest difference between the two sets of standards is that the age of electric energy meters is subject to hierarchical control:

The old version of the regulations uniformly divides accuracy levels: 0.2S and 0.5S high-precision meters can be used for up to 6 years; Resident level 2, industrial and commercial level 1 active and reactive electric energy meters are uniformly set with an 8-year usage limit, without distinguishing operating conditions, and must be rotated as a whole upon expiration.

The new version of the regulations replaces traditional precision labeling with three-level classification of A, B, and C, adjusting the thinking to take into account both the safety of livelihood measurement and the cost reduction needs of industry and commerce: C-level corresponds to single-phase electricity meters for ordinary residents, with a legal maximum service life of 8 years, and the bottom line of livelihood measurement remains unchanged; The service life of B-class multifunctional meters and A-class high-voltage high-precision measuring meters has been extended to 10 years; If both active and reactive power metering functions are integrated into a single electricity meter, the shorter of the two shall be applied.

Overall, the new regulations have not relaxed the basic usage period of household meters for residents, but only extended the service life of high-precision meters for industrial and commercial use. This not only conforms to the industry's current situation of improving the reliability of electronic components, but also provides unified technical and regulatory support for the implementation of status extension management in various regions.

To carry out status evaluation and extend the service life of qualified electricity meters, three mandatory conditions must be met simultaneously: firstly, having provincial-level registered measurement standards, such as the provincial-level local regulations issued by Sichuan, and residential electricity meters that meet operational standards can be used for up to 14 years; Tianjin launches exclusive calibration standards and implements the "only replace inaccurate fault table" mode; Henan, Hangzhou, and Xinjiang have all issued corresponding local standards as the basis for implementation. Secondly, a 24/7 remote online monitoring system will be established, relying on the main station for collecting electricity consumption information from the power grid, to continuously collect multidimensional data such as meter measurement errors, operating temperatures, clock anomalies, and communication failures. The existing evaluation model in Tianjin has an accuracy rate of 98.57% in identifying faulty meters, which can accurately distinguish between qualified meters with stable operation and faulty meters with hidden dangers. Thirdly, establish a closed-loop risk control process for delayed electricity meters, setting up a complete control chain of "centralized evaluation upon expiration, record keeping of delayed accounts, quarterly on-site review, and immediate replacement of abnormalities". Once measurement deviations or hardware aging issues are detected, regardless of whether the delay period has expired, free on-site replacement is required to avoid measurement accuracy risks.