Power system is connected directly with the user, and to link users to distribute power

Power system is connected directly with the user, distribution of electric energy to the user's part. air circuit breaker consists of distribution electri cenergy meter, high voltage distribution lines (ie a voltage kV and above), distribution transformers, low voltage distribution lines (1 kV voltage) and the corresponding control and protection equipment. Typically the distribution substation to the user's part is called the home line before distribution system.
Power distribution systems electric meter used methods are: ① three-phase three-wire system; ② with a neutral three-phase four-wire system; ③ three-phase two-wire a ground system; ④ single-phase two-wire system; ⑤ DC distribution. A variety of distribution methods and its main applications are in the table.