Introduction: A high-voltage fuse is an electrical appliance that protects circuits. Most electrical appliances used in our daily lives have high-voltage fuses. After all, high-voltage fuses protect circuits and electrical appliances. Fuses are divided into high-voltage fuses and low-voltage fuses. The purpose and working principle of these two types of fuses are almost the same, but their functions are different. So what is the role of high-voltage fuses?
1. An overview of high-voltage fuses.
It can be said that the fuse is the simplest and earliest used protective circuit in electrical equipment, mainly because the fuse can cut off the fault current. Nowadays, the fuse is widely used because of its simple internal structure, low cost, convenient maintenance and more flexible use. But there are also some shortcomings, that is, the capacity is small, and the characteristics of protecting electrical products are unstable.
The internal structure of a high-voltage fuse basically includes an arc extinguishing device, that is, a so-called fuse tube, a metal melt, a melt, a contact that supports the melt, and an insulating base. Among fuses, the classification of high-voltage fuses and low-voltage fuses is based on voltage. Generally, the commonly used fuse material of high-voltage fuse is copper or silver. Because copper has strong electrical conductivity and good thermal conductivity, but copper is easy to oxidize in the air, it needs to be protected by plating a layer of silver on the surface.
2. The role of high-voltage fuses.
High-voltage fuse is a kind of fuse, so like fuse, it plays a role in protecting the circuit in electrical appliances. In the work of a high-voltage fuse, if the current in the circuit exceeds a specified value, it will generate a kind of heat to fuse the fuse, thereby disconnecting the circuit to protect the electrical appliance. And the greater the current on the melt, the faster the fusing speed. Of course, the fusing time is related to the material of the melt and the fusing current.
