Fuses and circuit breakers are able to achieve the same point short circuit protection, the principle is the use of electric current flowing through the fuse conductor heating conductor causes high voltage fuses, after reaching the melting point of conductors melting so disconnected circuit protection and electrical lines will not be burn. It is a cumulative heat fuse, so it can achieve overload. Once burned to be replaced melt melt. Fuse mainly from the melt, the housing and bearing three parts enclosed fuse, which is a key element to control the melt fusing characteristics. Material, size and shape of the melt determines the fusing characteristics. The melt material is divided into two types of low-melting and high melting point. Low melting point materials such as lead and lead alloys, its low melting point readily fuse, due to its resistance is large, it is larger cross-section sized to melt and fuse metal vapor produced when more apply only to low breaking capacity of the fuse device. Refractory material such as copper, silver, its high melting point, is not easy to fuse, but because of its lower resistivity wholesale fuses, can be made less than the cross-sectional dimension smaller melt low-melting fusible metal vapor is generated when applicable to fuse high breaking capacity. The shape of the melt into filaments and strip the two. Change the shape of variable cross-section can significantly alter the characteristics of the fuse. There are various fuses fusing characteristic curve, it can be applied to the needs of different types of protected objects. Xi'an high (Figure) _ _ Guangzhou fuse spiral fuse provided by Xian Huayi power plant. Xian Huayi Electric Power Equipment Factory (www.xahy.com) is specialized in "high-voltage vacuum circuit breakers, low voltage switch cabinet, box-type substation, power transformers, voltage and" business, the company adhering to the "honesty, hard service" philosophy, to provide you with the highest quality products and services. Welcome to inquire! Contact: Mr.