Select the main fuse protection features based on the size of the load and select the type of short-circuit current of the fuse. For small capacity motor and lighting branch, is often used as a fuse overload and short circuit protection Nanning high-voltage fuse, so I hope melt melting appropriate coefficient smaller. Usually used pewter melts RQA series fuses. For larger capacity motors and lighting trunk, you should consider focusing on short-circuit protection and breaking capacity. Typically used with a high breaking capacity fuses RM10 and RL1 series; when the short-circuit current is large, should adopt RT0 and RTl2 Series Fuses have limiting the role of the current range according to breaking can be divided into general-purpose fuse Guangzhou high-voltage fuse device, a full range of back-up fuses and fuse. General purpose fuse breaking current range is from overload current is greater than 1.6 to 2 times the rated current from Dongguan high-voltage fuse, breaking current maximum range. This fuse is mainly used to protect power transformers and general electrical equipment. Backup fuse breaking current range is from overload current greater than the rated current of 4 to 7 times until the maximum breaking current range. This fuse is often used in tandem with the contactors, overload current of less than 4-7 times the rated current range, by breaking the contactor to achieve protection. Mainly used to protect the motor. Kaifeng High Pressure fuses, 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.