Miniature circuit breaker with novel zero-sequence transformer installation structure

Abstract

The invention discloses a miniature circuit breaker with a novel zero-sequence transformer installation structure. The miniature circuit breaker comprises an intelligent control module, a first circuit breaker and a second circuit breaker which are sequentially arranged side by side, wherein the first circuit breaker comprises a first shell, an electric leakage protection module arranged in the first shell, a first incoming line terminal, a first outgoing line terminal and a zero line wiring board, one end of the zero line wiring board is connected with the first incoming line terminal, the other end of the zero line wiring board penetrates through the electric leakage protection module and is connected with the first outgoing line terminal, the electric leakage protection module is connected with the intelligent control module, the second circuit breaker comprises a second shell, a current transformer arranged in the second shell, a second incoming line terminal, a second outgoing line terminal and a live line wiring board, one end of the live line wiring board is connected with the second incoming line terminal, the other end of the live line wiring board sequentially penetratesthrough the second shell, the first shell, the electric leakage protection module and the current transformer and is connected with the second outgoing line terminal, and the current transformer is connected with the intelligent control module. The miniature circuit breaker aims to optimize the structure of the circuit breaker, reduce the cost and decrease the volume.

Description

technical field [0001] The invention relates to the technical field of circuit breakers, in particular to a small circuit breaker with a novel zero-sequence transformer installation structure. Background technique [0002] The circuit breaker has the function of automatic reclosing, which is used to protect people from indirect contact, and can also be used to prevent fire hazards caused by ground fault currents caused by equipment insulation damage, and can be used to distribute electrical energy and protect circuits and power supply equipment from overload and Short circuit can also be used for infrequent switching of lines and infrequent starting of motors. [0003] The leakage protection module installed in the existing circuit breaker is generally located inside the intelligent control module. When the leakage protection module is used for a long time, the life of the magnetic ring in the leakage protection module will decrease, and it is difficult to replace, so the en...

AI Technical Summary

Problems solved by technology

[0003] The current leakage protection module of the existing circuit breaker is generally located inside the intelligent control module. When the leakage protection module is used for a long time, the life of the magnetic ring in the leakage protection module will decrease, and it is difficult to replace, so the entire circuit breaker can only be scrapped.

The leakage protection module can also be installed separately outside the circuit breaker, which makes the installation of the circuit breaker more troublesome, high cost, and bulky.

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