This standard is applicable to indoor high and low voltage integrated electric energy metering cabinets and 0.38 to 220kV high and low voltage split type cabinets with AC 50Hz, rated voltage 0.38 ~ 35kV, rated current 20 ~ 1000A and the same metal structure as the power user's power supply line. Electric energy metering cabinets (such as metering transformer cabinets, metering instrument cabinets). In the article, where the "integral type" is named, only the provisions for the integral type electric energy metering cabinet are applicable. Those who are not named are applicable to integral or split electric energy metering cabinets.