Automatic reclosing miniature circuit breaker

Abstract

The invention relates to an automatic reclosing miniature circuit breaker. The miniature circuit breaker comprises a circuit breaker unit and an automatic reclosing device assembled with the circuit breaker unit, the circuit breaker unit comprises an N-line switch module, an L-line switch module and a leakage protection metering module, and the leakage protection metering module comprises a shell and a leakage protection metering assembly arranged in the shell. The electric leakage protection metering assembly comprises an electric leakage protection circuit board, two manganin steel conductive tubes, a zero sequence mutual inductor sleeved on the two manganin steel conductive tubes, two wiring terminals, and two conductive sheets respectively connected between the two wiring terminals and the two manganin steel conductive tubes. One ends of the two manganin steel conductive tubes are electrically connected with the N-line switch module and the L-line switch module respectively, and a lead is connected between each of the two ends of each manganin steel conductive tube and the leakage protection circuit. The miniature circuit breaker has the advantages of simple structure, stable and reliable performance, small volume, convenient assembly and low cost.

Description

technical field

[0001] The invention relates to the technical field of circuit breakers, in particular to a small circuit breaker with automatic reclosing. Background technique

[0002] At present, miniature circuit breakers are widely used in low-voltage distribution networks, mainly in various places such as industry, commerce, high-rise buildings and residential buildings, and can provide overcurrent protection and leakage protection for electrical equipment such as motors, distribution lines, and lighting circuits. Protect. The opening and closing actions of traditional miniature circuit breakers need to be completed manually. With the development of my country's smart grid, under the premise of requiring the safe operation of the grid, it is more and more urgent to realize the intelligent control of electrical appliances. In order to cope with new situation changes, the existing miniature circuit breaker should have automatic reclosing function. The electric operatin...

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