Circuit breakers , active in all areas of the plant! High voltage and low voltage are inseparable from the circuit breaker, it is a very basic low voltage electrical appliances , circuit breakers with overload, short circuit and under voltage protection, the ability to protect the line and power supply.
Air switch and circuit breaker usage and function are similar! Only the general open air used in the load less occasions, the circuit breaker is generally used in the load is relatively larger occasions! According to the different arc medium used, circuit breakers include air circuit breakers (commonly known as air switch), vacuum circuit breakers, SF6 circuit breakers, oil circuit breakers. Electrical design of civil buildings as the voltage is mostly 220 ~ 380V, the circuit breaker arc medium for the air, so that the air switch or circuit breakers are right. But for the power system, it is necessary to identify the specific treatment.
Circuit breakers are generally divided into high-voltage circuit breakers and low-voltage circuit breakers, under normal circumstances we will be more than 3kV called high-voltage electrical appliances. Low-voltage circuit breakers have been called automatic switch, in addition to its role in the control circuit, but also has some protection features, such as overload, short circuit, under voltage and leakage protection. It has a wide range of applications, is almost everywhere in our daily life and makes our lives safer because of its existence. High-voltage circuit breaker is a kind of electrical appliance which we do not touch frequently. It plays a controlling role in high-voltage circuit and is one of the important electrical components in high-voltage circuit. Circuit breakers are used to switch the circuit on and off during normal operation. The fault condition switches off the circuit quickly under the protection of the relay and the short-circuit current can be reliably connected under special conditions, such as when automatically reclosing to a faulty line. High-voltage circuit breakers in the normal or fault conditions connected to the high-voltage circuit or disconnect the special appliances.
At present, the low-voltage circuit breaker is used for AC voltage 1200V, DC voltage 1500V circuit from off, control or protection role of electrical appliances. Low-voltage circuit breaker is an important part of the electrical industry in the machinery industry is the basic ancillary components in the power distribution system, low-voltage switchgear consists of a variety of low-voltage circuit breaker components, low-voltage circuit breaker features and performance of low-voltage switchgear Equipment plays a vital role. More than 80% of the power generated by power generation equipment is distributed through low voltage circuit breakers. Each additional 10,000 kW power generation equipment, about 20000 various types of low-voltage circuit breakers and supporting. In the industrial automation system, it also needs various control panels, consoles, controllers and other products composed of low-voltage circuit breakers.
At the same time, as vacuum circuit breaker technology advances, the vacuum circuit breaker technology advances in the performance of large-capacity, low over-voltage, intelligent and small. And this progress is again due to the vacuum technology, the development of interrupter technology and the adoption of new technology, new materials and new operating technology results. According to the inventor, this kind of technology can not only serve as an alternative to traditional motor technology, but also expand the development and application space of DC motor. Such as the development of high-capacity DC instead of HVDC grid-fed AC synchronous generator and converter station equipment, not only can save a lot of converter station construction costs, but also significantly reduce transformer losses.
In the future circuit breakers will be dedicated to the type, multi-function, low voltage, intelligent direction.
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