Classification of commonly used electric energy meters
Electric energy meters can be divided into DC electric energy meters and AC electric energy meters according to the circuits they use. AC electric energy meters can be divided into single-phase electric energy meters, three-phase three-wire electric energy meters and three-phase four-wire electric energy meters according to their phase lines.
Electric energy meters can be divided into electrical-mechanical electric energy meters and electronic electric energy meters (also known as static electric energy meters and solid-state electric energy meters) according to their working principles.
Electromechanical electric energy meters are used in AC circuits as ordinary electric energy measuring instruments, and inductive electric energy meters are commonly used. Electronic energy meters can be divided into fully electronic energy meters and electromechanical energy meters.
Electric energy meters can be divided into integral electric energy meters and split electric energy meters according to their structure.
Electric energy meters can be divided into active energy meters, reactive energy meters, maximum demand meters, standard energy meters, multi-rate time-of-use energy meters, prepaid energy meters, loss energy meters and multi-function energy meters according to their uses.
Electric energy meters can be divided into ordinary installation electric energy meters (0.2, 0.5, 1.0, 2.0, 3.0 grades) and portable precision electric energy meters (0.01, 0.02, 0.05, 0.1, 0.2 grades) according to their accuracy levels.