Multifunction energy meters can be classified according to methods prescribed by national standards, specifically based on connection modes, categories of measured electrical energy, and accuracy classes. Product models are typically designated based on codes representing their type and function, as well as their specific technical specifications.
Classification According to National Standards
According to the national standard GB/T 17215.301, multifunction energy meters can be classified based on their connection mode, the category of electrical energy being measured, and their accuracy class.
Classification by Function
Based on functionality, meters can be categorized into prepaid types, Time-of-Use (TOU) billing types (or multi-rate types), multifunction types, and maximum demand types, among others. Examples of prepaid meters include three-phase CPU card prepaid energy meters; examples of TOU meters include the DDSF150-M single-phase static multi-rate smart energy meter. Multifunction meters typically integrate various capabilities-such as energy metering, data storage and processing, and communication-into a single unit. Maximum demand meters, meanwhile, incorporate features such as maximum demand indicators.
Classification by Number of Phases
Based on the number of phases, meters are primarily divided into single-phase energy meters and three-phase energy meters. Single-phase meters typically have a rated voltage of 220V and are commonly used in residential settings. Three-phase meters encompass various types, including Class B, Class C, and Class D models. In terms of market demand volume, single-phase smart meters currently hold a dominant position.
Classification by Connection Mode
Based on the connection mode, meters can be classified as direct-connection types; for instance, the DDSF150-M single-phase static multi-rate smart energy meter is a single-phase direct-connection device.
Classification by Accuracy Class
Based on accuracy class, common categories include Class 0.2S, Class 0.5S, Class 1, and Class 2.
Product Models and Naming Conventions
Energy meter model designations are generally constructed using codes representing the meter type, accuracy class, specific functions, and design version. The type code for smart energy meters is typically "D." Function codes are commonly assigned as follows: F (Time-of-Use billing), S (Electronic type), Y (Prepaid type), D (Multifunction), M (Pulse output type), Z (Maximum demand), etc. Specific model designations vary by manufacturer but typically incorporate a combination of the aforementioned function codes and technical specifications. Product model examples include the DDSF150-M single-phase static multi-tariff smart energy meter, the KH-DDS2851 series single-phase multi-functional energy meter, three-phase electronic multi-functional energy meters, and the Acrel ADL3000-CT/CL DIN-rail multi-functional meter, among others.