Brief analysis of the distinction and development trend of circuit breakers

What is the difference between the air switch and the circuit breaker that people often say? The usage and function of the air switch and circuit breaker are actually similar, except that in general, the air switch is used in the case of small power overload load, and the circuit breaker is used in the case of relatively large load. According to the different arc extinguishing mediums used, the types of circuit breakers include air circuit breakers and air switches, vacuum circuit breakers, sf6 circuit breakers, oil circuit breakers, etc. Due to the low voltage of civil building electrical design, 220 ~ 380V, circuit breakers The arc extinguishing medium is air, so it is called air switch or circuit breaker. But for power system management, it is necessary to deal with the specific identification.

In recent years, with the continuous improvement of vacuum circuit breaker technology, vacuum circuit breaker technology is mainly manifested in large capacity, low overvoltage, intelligence and miniaturization. This progress is due to the development of vacuum technology and arc extinguishing chamber technology and the use of new processes, new materials and new operating technologies. In addition to being a substitute for traditional motor technology, this technology will also expand the broader development and application space for DC motors. For example, the development of large-capacity DC motors to replace AC synchronous generators and converter station equipment powered by high-voltage DC transmission grids can not only save a lot of construction costs for converter stations, but also greatly reduce the power loss.

In the future, the circuit breaker will be developed in the direction of dedicated type, multi-function, low overvoltage, and intelligence.

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