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保险丝的作用是保护电源与导线,避免短路,保护用电设备,防止过载。保险丝管的主要性能之一是保护特性。所谓保护特性是过载电流与断开时间的关系。图1中的横座标为断开时间即过载电流发生至断开的瞬间,以S为单位,纵座标为保险丝额定电流的百分值。按保护特性的断开时间的长短,保险丝有慢速、中速及快速之分。图中曲线1为慢速,曲线2为中速,曲线3为快速。例如,同样规格额定电流的保险丝,它们在110%
The role of the fuse is to protect the power and wires, to avoid short circuits, protect the electrical equipment to prevent overload. One of the main features of a fuse tube is its protective properties. The so-called protection characteristics is the relationship between overload current and off time. The abscissa in Figure 1 is the moment of disconnection, which is the moment when the overload current occurs to the moment of disconnection, in S, and the ordinate is the percentage of the fuse rated current. According to the protection of the characteristics of the length of the disconnect, the fuse has slow, medium and fast points. Curve 1 is slow, curve 2 is medium, curve 3 is fast. For example, the same specifications rated current fuse, they are 110%