company news about Breaking capacity of fast-acting fuse

        The case strength of a fast-acting fuse largely determines its breaking capacity for the maximum fault current. Secondly, the shape of the metal frit inside the fast-acting fuse, the ability of the filler to absorb metal vapor and heat, and the electromotive force of the fuse all affect the breaking capacity. A fast-acting fuse with insufficient breaking capacity will continue to arc until it explodes. In severe cases, it will cause an AC-DC short circuit, so the rated breaking capacity is a very important safety indicator.

        When the breaking capacity meets the requirements of the rectifier, it should also be noted that the peak value of the arc voltage at the moment of breaking (referred to as "transient recovery voltage" in the standard) should not be too high, and it should be limited during the manufacture of fast-acting fuses to make them lower than those required by semiconductor devices. The maximum value that can be tolerated, otherwise the semiconductor device will be damaged. Therefore, the fuse with the shortest breaking time may not be the most suitable.

        When the fast-acting fuse is used in a DC circuit, because there is no voltage zero-crossing point during the DC breaking process, this is a harsh condition for the reliable breaking of the fast-acting fuse, so in general, if the fast-acting fuse is used in a DC circuit Only 60% of the rated voltage of the fast-acting fuse can be used, and it is best to use a DC fast-acting fuse.