The Four-stage Process Of The Drop-out Fuse

1. The melt of drop out type fuse is heated by overload current or short-circuit current, and its dropout fuse of transformer temperature rises to the melting point of the melt alloy material, but the melt is still in a solid state and expulsion drop out fuse has not yet begun to melt.

2. The melt alloy metal begins to transform from solid to plastic and liquid. Since the melt absorbs part of the heat (melting heat) at this time, the melt temperature remains at the melting point.

3. The melted metal is continued to be heated by fuse drop out until its temperature reaches the vaporization point of the melt. This is the secondary heating stage.

4. The molten metal breaks and a gap appears. The gap is broken down by the ht drop out fuse electric field to generate an arc until the arc is completely extinguished.