Induction melting furnace accessories: fast fuse

As a branch of the big field of fuse, fast fuse is mainly used in the short-circuit protection of rectifier devices or semiconductor rectifier components. What are the characteristics of fast fuse?

1. Current limiting characteristics

Because the melt of the fast fuse is a rectangular sheet with a series of round hole necks, and is filled with quartz sand arc extinguishing medium, at the same time, the cross-sectional area of ​​the round hole necks is small and the heat capacity is small. Therefore, when a short-circuit fault occurs in an object, when the fault current has not reached the expected short-circuit current, it will be fused in a particularly short time, and the arc will be divided into many small sections by the quartz sand. This not only limits the increase of short-circuit current, but also speeds up the extinguishing speed of the arc. This feature also enables the fast fuse to react quickly in the event of a short-circuit failure of the object, reducing the hazard.

2. Strong breaking capacity

When a short-circuit fault occurs in the equipment, first the neck of the round hole will be fused, and then the arc is divided into many small sections by quartz sand, and the arc is quickly extinguished. Because the quartz sand is insulating, when the arc is extinguished, the fast fuse will immediately become an insulator, breaking the circuit. The gradual and rapid progress of these steps determines that the breaking capacity of the fast fuse is stronger than other fuses.

3. The impact energy of the load equipment is small

The breaking time of the fast fuse is relatively short, and at the same time it has a good current limiting effect, so the impact energy of the load equipment is small.

The above three points are the three main characteristics of fast fuse, and one of the more prominent features is the fastness of other fuses. It is precisely because of this feature that enterprises and factories can wait. Carrying out production operations in a safe environment also makes professional fast fuses more popular than other types of fuses in the highly competitive market.