Fuse inspection checks: 1. Check the fuse and melt ratings is compatible with the protection equipment; 2, check the fuse look for damage, deformation, ceramic insulating portion or without flashing discharge traces; 3, check the fuse the contact point is intact, in close contact with the fuse factory outlets, with or without overheating; 4, blown fuse indicator signal is normal. 1, no load protection smooth start-up process, such as lighting circuits, resistors, electric and other helical type fuse, melt rated current equal to or slightly greater than the rated current of the load circuit: the following methods to select the rated current can melt. 2, a single long-term protection of the motor current can melt the maximum starting current selection, you can also press the formula chosen: IRN ≥ (1.5 ~ 2.5) IN formula IRN-- melt rated current; IN-- rated motor current . If the motor frequent starting, where appropriate coefficient may be increased to 3 to 3.5, in particular should be based on the actual situation. 3, to protect more than one motor (supply mains) IRN ≥ permanent jobs (1.5 ~ 2.5) IN max + ΣININ max- largest capacity single motor rated current. ΣIN rest. Motor rated current. Fuse factory direct, Huayi Electric Power (certified), Xi'an, Guangzhou fuses provided 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.