Melt fuse rated current equal to the rated current of the sea high voltage fuses, melt the rated current of the protected equipment by selecting Huizhou load current high-voltage fuses, fuse current rating should be greater than the rated current of the melt, with the main electrical appliances with OK. 1, no load protection smooth start-up process, such as when the lighting circuits, resistors, electric furnace 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 maximum starting current selection Zhuhai high-voltage fuse, the following formula can be selected: IRN ≥ (1.5 ~ 2.5) IN where IRN-- melt rated current; IN- - rated motor current. If the motor frequent starting, where appropriate coefficient can be increased to 3 to 3.5, in particular should be based on the actual situation. 3, protecting multiple motors (supply mains) IRN ≥ permanent jobs (1.5 ~ 2.5) IN max + ΣININ max- largest capacity single motor rated current. ΣIN remaining motor rated current. Shantou high-voltage fuses high-voltage fuse _ _ Huayi electricity provided by the Xi'an Huayi power plant. Xian Huayi power plant (www.xahy.com) strong, credible, in Xi'an high-voltage circuit breakers and other industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Huayi power and you hand into the brilliant, for a better future!