Understanding Fuses: What They Are and How They Work Explained

A fuse is an electrical device used to protect circuits. When the current in the circuit exceeds a specified value, the fuse will melt the melt with the heat generated by itself, thereby disconnecting the circuit and providing protection. Fuses are widely used in high and low voltage distribution systems, control systems, and electrical equipment. As a protector for short circuits and overcurrent, they are one of the most commonly used protective devices. ‌

Working principle of fuse
The working principle of a fuse is based on the current exceeding the specified value for a period of time, and the heat generated by itself melts the melt, thereby disconnecting the circuit. Specifically, when the current of the protected circuit exceeds the specified value and after a certain period of time, the heat generated by the melt itself will melt it, thereby disconnecting the circuit and providing protection.

Application scenarios of fuses
Fuses are widely used in high and low voltage distribution systems, control systems, and electrical equipment as protectors for short circuits and overcurrent. It is one of the most commonly used protective devices.

The function of a fuse
The main function of a fuse is to protect circuits and electrical equipment from damage caused by abnormal conditions such as overload and short circuit. When the current exceeds the specified value, the fuse will melt the melt through its own generated heat, thereby disconnecting the circuit and protecting the safety of equipment and personnel.

Specific protection functions of fuses
Overload protection: prevent electrical equipment from working for a long time above the rated current, avoid excessive temperature rise, damage to insulation materials, and even cause fires.
Short circuit protection: In the event of a short circuit in the circuit, the fuse will quickly cut off the circuit, preventing damage to electrical equipment or wires and cables, and avoiding serious consequences such as fire.
Quick circuit cut-off: In the event of abnormal situations such as overload or short circuit in the circuit, the fuse can quickly cut off the current, avoiding the equipment from being affected by excessive current and causing safety accidents.
Current limiting protection: In some cases, fuses can limit the speed of current change through their melting characteristics, protecting equipment from damage.
Eliminating the need to replace wires: In the event of overload or short circuit in electrical equipment, fuses can save the trouble and cost of replacing wires by simply replacing the fuse.