Enclosed Fuse: Closed divided filler fuses and fuse no fuse two fillers, shown in Figure 3 and Figure 4. Square ceramic filler tube fuse, built quartz sand and melt, usually with strong breaking capacity fuses for voltage below 500V, current levels 1KA following circuit. No filler sealed fuse will melt into the closed cylinder, breaking capacity smaller, less sunshine for 500V high voltage fuses, 600A under the power grid or distribution equipment. The main fuse from the melt, housing and bearing three parts, which are key components to control the melt fuse characteristics. Material, size and shape determine the melt fusing characteristics. The melt material is divided into two types of low melting point and high melting point. Low melting point materials such as lead and lead alloys, its low melting point, high-voltage fuse easily blown Zibo, due to its greater resistance, it made a larger cross-sectional dimensions of the melt, fuse metal vapor produced when more Jining high-voltage fuse, applies only to low-scoring breaking capacity fuses. Refractory material such as copper, silver, its high melting point, is not easy to fuse, but because of its low resistivity, can be made smaller than the low melting point of melt-sectional dimension, less is blown to produce metal vapor, suitable for high breaking fuse capacity. The shape of the melt into filaments and two ribbon. Variable cross-section shape change can significantly alter the characteristics of the fuse. There are various fuses fusing characteristic curve, can be applied to the needs of different types of protected objects. Texas high-voltage fuse, Huayi Electric Power (certified), fuses provided by Xian Huayi power plant. Xian Huayi power plant (www.xahy.com) is a leader in Xi'an, high voltage circuit breakers, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Huayi power in leadership with the staff warmly welcome all inquiries negotiations to create electricity Huayi a better future.