Universal molded case circuit breaker

Abstract

The invention discloses a universal molded case circuit breaker. Terminal numbers of an upper inlet wire of a molded case circuit breaker body are 1, 3, 5 and N from left to right, and terminal numbers of a lower outlet wire of the molded case circuit breaker body are 2, 4, 6 and N from left to right; the zero line wiring terminal corresponding to the terminal number N in the upper inlet line is communicated with the zero line wiring terminal corresponding to the terminal number N in the lower outlet line; the live wire wiring terminal corresponding to the terminal number 1 in the upper inlet wire is disconnected from the live wire wiring terminal corresponding to the terminal number 2 in the lower outlet wire; the live wire wiring terminal corresponding to the terminal number 3 in the upper inlet wire is disconnected from the live wire wiring terminal corresponding to the terminal number 4 in the lower outlet wire; and the live wire wiring terminal corresponding to the terminal number 5 in the upper inlet wire is disconnected from the live wire wiring terminal corresponding to the terminal number 6 in the lower outlet wire. The molded case circuit breaker is generally used in a single-phase system, a three-phase three-wire system and a three-phase four-wire system. The circuit breaker can be used in a single-phase system, a three-phase three-wire system and a three-phase four-wire system at the same time, and can be universal without changing the internal circuit and the structure of the circuit breaker.

Description

technical field [0001] The invention relates to the technical field of power distribution system compatibility, in particular to a general-purpose molded case circuit breaker. Background technique [0002] Molded case circuit breakers are more and more widely used in power distribution systems. Molded case circuit breakers can automatically cut off the current after the current exceeds the trip setting. Molded case refers to the use of plastic insulators as the outer shell of the device. To isolate conductors and grounded metal parts, molded case circuit breakers usually contain thermal magnetic trip units, while larger models will have solid state trip sensors. [0003] However, the existing molded case circuit breakers on the market have poor versatility and cannot meet the use of single-phase systems, three-phase three-wire systems, and three-phase four-wire systems at the same time. If you want them to meet the requirements of different systems, you must Professionals a...

AI Technical Summary

Problems solved by technology

[0003] However, the existing molded case circuit breakers on the market have poor versatility and cannot meet the use of single-phase systems, three-phase three-wire systems, and three-phase four-wire systems at the same time. If you want them to meet the requirements of different systems, you must Professionals are required to modify its internal circuit and structure

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