Melt blown, blown to carefully analyze the reasons for the possible reasons are: 1) Short-circuit or overload fault and normal operation of the fuse; 2) Melt use too long fuse, melt due to oxidation or high temperature operation , so that the melt characteristics change misjudgment; 3) mounted mechanical damage melt spiral fuse to smaller cross-sectional area caused by misjudgment in operation. Fuse Caution: 1, fuse protection features should be protected object overload fuse to meet a character, taking into account the possible short-circuit current, the choice of the appropriate fuse breaking capacity; 2, the fuse voltage rating adaptation line voltage level, the fuse rated current is greater than or equal to the rated current melt; 3, line fuses melt at all levels with a current rating appropriate to maintain the previous level must be greater than the rated current of the melt Melt the next level rated current; 4, according to require the use of a melt fuse fitted melt, do not allow to increase the melt or with other conductors instead of the melt. High-voltage fuse, Huayi Electric Power (certified), Xi'an, Hangzhou 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.