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What is the nature of the electronic fuse to work?

发布时间:2017-09-22 11:36:53         阅读次数:214
In our industry or life there are many products have their own characteristics and working principle, of course, the fuse is no exception, it is now Dongguan City Zhiyuan Electronics Co., Ltd. and everyone to understand the use of what kind of fuse is the use of it?

When the current flows through the conductor, because the conductor there is a certain resistance, so the conductor will heat. Q is the heat, 0.24 is a constant, I is the current flowing through the conductor, R is the resistance of the conductor, and T is the time that the current flows through the conductor. In this way, the heat is the same as the current, We can easily see the simple working principle of the fuse.

When the material and shape of the fuse are determined, the resistance R is relatively constant (if its resistance temperature coefficient is not taken into account). When the current flows through it, it will heat up, with the increase of time its heat is also increasing. The size of the current and the resistance determines the rate at which the heat is generated. The configuration of the fuse and the condition of its installation determine the rate of heat dissipation. If the velocity of heat is less than the rate of heat dissipation, the fuse will not blow. If the speed of heat generation is equal to the speed of heat dissipation, it will not blow for a long period of time. If the heat generated by the speed is greater than the speed of heat dissipation, then the heat will be more and more. And because it has a certain heat and quality, the increase in heat is reflected in the temperature rise, when the temperature rises above the fuse above the fuse when the fuse occurred. This is the working principle of the fuse. From this principle, you should know that when designing and manufacturing fuses, you must carefully study the physical properties of the materials you choose and ensure that they have consistent geometric dimensions. Because these factors on the fuse can work properly played a vital role.

Likewise, when you use it, be sure to install it correctly. What is the function of the fuse? What are the requirements? What are the requirements? General fuse consists of three parts: First, the melt part, it is the core of the fuse, when the fuse to cut off the role of current, the same type, the same specifications fuse Of the melt, the material should be the same, the geometric dimensions to be the same, the resistance value as small as possible and consistent, the most important is the fuse characteristics to be consistent; the second part of the electrode, usually two, it is the melt and circuit Important parts, it must have good conductivity, should not produce a significant installation of contact resistance; Third, the bracket part of the fuse melt are generally slender and soft, the role of the bracket is to melt and make the three parts become rigid The whole is easy to install, use, it must have good mechanical strength, insulation, heat resistance and flame resistance, in use should not produce fracture, deformation, combustion and short circuit phenomenon; power circuit and high power equipment used Of the fuse, not only the general three parts of the fuse, but also the arc extinguishing device, because these fuses protect the circuit not only the operating current , And when the melt occurs when the two ends of the voltage is also high, often the melt has melted (blow) or even vaporized, but the current is not cut off, the reason is the moment in the fuse and the role of the current , The fuse between the two electrodes occurred between the arc phenomenon.

The arc extinguishing device must have a strong insulation and good thermal conductivity, and was negative. Quartz sand is commonly used arc extinguishing materials. In addition, there are some fuse fuse device, its role is when the fuse action (fuse) after its own appearance changes, easy to be found by maintenance personnel, such as: light, color, pop-up solid indicator. What are the types of fuses? In the form of protection, can be divided into: over-current protection and overheating protection. Fuses for overcurrent protection are commonly known as fuses (also known as current limiting fuses). Fuses for overheat protection are commonly referred to as "temperature fuses". Temperature fuse is divided into low melting point alloy shape and temperature contact shape and memory alloy shape and so on (temperature fuse is to prevent the heating appliances or easy to heat the temperature is too high to protect, such as: hair dryer, iron, rice Pots, electric furnaces, transformers, motors, and so on; it responds to the rise in temperature rise of electrical appliances, regardless of the size of the operating current of the circuit. Its working principle is different from "current limiting fuse"). According to the scope of use, can be divided into: power fuse, machine fuses, electrical instrument fuse (electronic fuse), car fuse.

According to the volume points, can be divided into: large, medium, small and micro. According to the rated voltage points, can be divided into: high-voltage fuses, low-voltage fuses and safety voltage fuses. According to the breaking ability, can be divided into: high, low breaking capacity fuse. According to the shape, can be divided into: flat head tubular fuse (can be divided into internal welding fuse and external welding fuse), pointed tube fuse, guillotine fuse, screw fuse, insert fuse, flat fuse, wrapped Fuse, SMD Fuse. According to the fuse speed, can be divided into: special slow fuse (generally used TT), slow fuse (generally used T), medium speed fuse (generally used M), fast fuse (generally used F), special Fast fuses (generally indicated by FF). According to the standard points, can be divided into: European regulations fuse, the United States regulatory fuse, the Japanese regulatory fuse.

东莞市AG电投网精密电器有限公司是一家具有多年市场经验积累、创新实力与全球品牌影响的专业从事电路保护元器件事业的公司(品牌WogeFuse),一直致力于推动安全保护领域的发展,积极满足客户和全球公衆不断增长的电路安全保护需求。

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