GB/T 37968-2019

This standard specifies the technical requirements, test methods, and inspection rules for testing devices used to verify the accuracy and performance of high-voltage electricity metering equipment, such as voltage transformers, current transformers, and energy meters operating above 1 kV. It is applied in power grid companies, metrology verification institutions, and electrical equipment manufacturing facilities to ensure compliance with national metrological regulations and to maintain billing accuracy in high-voltage transmission and distribution networks.