Delay fuse principle.carrier fuse_Industry Trends_News & Events_XC Electronics(Shenzhen)Corp.,LTD

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17 2023-07

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　　Under the same overcurrent load conditions, the action speed of a delay fuse is slower than that of a fast blown fuse. However, this is not that the reaction speed of a delay fuse is slow, but rather that the energy required for the fuse to fuse is greater. It can be said that it not only has the ability to react to overcurrent, but also has the ability to distinguish the category or energy size of overcurrent. Generally speaking, overcurrent can be divided into two categories: surge and fault. Surge overcurrent is mostly caused by charging and discharging during circuit switching or the influence of surrounding circuits. The peak value of the pulse is large and the duration is short, and the energy released is often not large. Delay fuses can withstand such overcurrent impacts without causing fusing action; However, fault overcurrent is continuous, and even if the peak value is not necessarily high, its energy will greatly exceed the surge overcurrent. Delay fuses will usually react quickly and blow. Therefore, from this perspective, the slightly slower action speed of delay fuses not only does not affect its protection function, but also enhances the protection function of delay, avoiding the opportunity for misoperation and can be applied in a wider range of occasions, Protects multiple circuits.

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