Development and application of mini small circuit breakers

Update date:2017-11-27 Source:MAXGE


The earliest circuit breaker in the world was created in 1885. It was a combination of a knife opening and an overcurrent trip. In 1905, air circuit breakers with free tripping devices were born. Since 1930, with the progress of science and technology, the discovery of arc principle and the invention of various arc extinguishing devices gradually formed the present institution. In the late 1950s, thanks to the rise of electronic components, electronic tripping devices were introduced, and today, thanks to the popularity of single-chip microcomputers, smart circuit breakers have been introduced.


Low-voltage circuit breaker, from its structure, use the functions of points, can be divided into universal type (also called frame type, known as international ACB) the plastic shell type (internationally known MCCS, small NICB) two categories, they are the same role is: under normal circumstances, do not frequently, circuit as starting, stop the motor; When the circuit or motor is overloaded, short circuit or undervoltage (the voltage is insufficient), the circuit can be automatically cut off and protected. According to the different protection objects, the circuit breaker can be divided into four types:


Power distribution protection - protection of power and electrical wiring (wires, cables) and equipment; Motor protection type - special motor for non-frequent starting, breaking in operation, and protection in motor overload, short circuit and undervoltage; Home and similar home protection - protection for lighting lines, household appliances, etc. Residual current (leakage) protection - a protective device used to protect the person from electric shocks and to prevent electrical fire.


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