How to wire the household watt-hour meter

Household watt-hour meters are all single-phase watt-hour meters, which have four terminals from left to right, namely 1, 2, 3 and 4. The connection mode is: 1 and 3 are respectively connected to the live and neutral terminals of the input watt-hour meter, and 2 and 4 are respectively connected to the live and neutral terminals of the output watt-hour meter, which is called "two-in and two-out" connection mode. Wiring is as follows: (so-called "1, 3 in, 2 out and 4 out")

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Classification of commonly used electric energy meters:

(1) watt-hour meters can be divided into DC watt-hour meters and AC watt-hour meters according to the circuits they use. Ac watt-hour meters can be divided into single-phase watt-hour meters, three-phase three-wire watt-hour meters and three-phase four-wire watt-hour meters according to their phase lines.

(2) According to its working principle, watt-hour meters can be divided into electromechanical watt-hour meters and electronic watt-hour meters (also called static watt-hour meters and solid-state watt-hour meters). Electromechanical watt-hour meter is a common electric energy metering instrument in AC circuit, among which inductive watt-hour meter is the most commonly used. Electronic watt-hour meters can be divided into full electronic watt-hour meters and electromechanical watt-hour meters.

(3) According to its structure, electric energy meters can be divided into integral electric energy meters and split electric energy meters.

(4) Electric energy meters can be divided into active electric energy meters, reactive electric energy meters, maximum demand electric energy meters, standard electric energy meters, multi-rate time-sharing electric energy meters, prepaid electric energy meters, loss electric energy meters and multifunctional electric energy meters according to their purposes.

(5) According to its accuracy grade, electric energy meters can be divided into ordinary installed electric energy meters (0.2, 0.5, 1.0, 2.0, 3.0) and portable precision electric energy meters (0.0 1, 0.02, 0.05, 0. 1, 0.2).

References:

Baidu encyclopedia-electric energy meter