保险丝的功能就是起保护作用,即当电路出现过流甚至短路时,保险丝能快速熔断,切断电路,防止事故的扩大,从而减少损坏。保险丝的这种保护特性,可以用电流—时间特件曲线(又称安一秒特性曲线)来表示,如图1所示。特性曲线表明,保险丝的熔断时间与 The function of the fuse is to protect, that is, when the circuit appears overcurrent or even short circuit, the fuse can quickly fuse, cut off the circuit to prevent the accident from expanding, thereby reducing damage. Fuse this protection features, you can use current - time curve (also known as safety one second characteristic curve) to represent, as shown in Figure 1. The characteristic curve shows that the fuse’s fuse time and