Fuses and distribution should be carried out maintenance work at the same time means: 1) clean the dust, checking contact point situation; 2) Check the fuse Appearance (remove the fuse tube) without damage, deformation, porcelain or without discharge flashing signs; 3) Check the fuse melts and the circuit or equipment to be protected matches the screw-out fuse, if the problem is timely investigations; 4) pay attention to check in TN grounding system of N line fuses, ground fault protection equipment fast online fuses, fuse is not allowed; 5) maintenance and inspection fuses, according to safety code requirements, cut off the power, do not allow live removal of the fuse tube. Spiral Fuse: melt on the end cap with a fuse indicator, once the melt blown fuse factory direct, immediate pop-up indicator can be observed through the glass ceramic cap on the hole, it is often used in machine tools, electrical control equipment . Screw type fuses. Breaking current is large, the voltage level can be used for 500V and below, current levels following circuit 200A, for short circuit protection. Screw type fuse, Huayi Electric Power (certified), Xi'an, Guangzhou fuses supplied by Huayi power plant. Xian Huayi Electric Power Equipment Factory (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. In Huayi Electric Power leadership with the staff warmly welcome all inquiries negotiations to create Huayi electricity better future.