An understanding of the characteristics of seconds, we can see from the Joule's law Q = I2 * R * T, series circuit, the fuse is essentially the same R-value, the heat made proportional to the square of the current I, and fever T proportional, ie: when the current is large, the time required to melt the fuse is shorter. And when the current is small Ganzhou high voltage fuses, fuse melt required for the longer time, even if the rate is less than the rate of heat accumulation fuses thermal diffusion, the temperature does not rise to the melting point of the fuse, the fuse will not even blown. So, in a certain overload current range, when the current returns to normal, the fuse is not blown, can continue to be used. Fuses and distribution should be carried out maintenance work at the same time means: 1) cleaning dust Changsha high-voltage fuse, check the contact point situation; 2) Check the fuse appearance (remove the fuse tube) without damage, deformation, porcelain or without Flashing signs of discharge; 3) Check the fuse melt matches with the protection circuit or device, if the issue is timely investigation; 4) pay attention to check the grounding system in TN N lines, equipment grounding line Yiyang high voltage fuse protection is not allowed to use fuses; 5) maintenance check fuses, according to the requirements of safety regulations, cut off the power, do not allow the removal of the fuse tube charged. Suzhou 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.