FNQ-15/100

Specialty Fuses: FNQ-15/100 Application Field and Working Principle

Fuse protection devices have been used for a very long time in various electrical systems for safety purposes. There are many types of fuses available, but the FNQ-15/100 is a type of specialty fuse that has found its use in a variety of applications due to its characteristics. This article provides an overview of the application field of the FNQ-15/100 and the general working principle of the fuse.

Application Fields of FNQ-15/100 Fuse

The FNQ-15/100 fuse is one of the most popular fuses used in the electrical industry today. It is especially suitable for applications requiring high current protection due to its ability to quickly detect and interrupt excessive current from flowing. This fuse can be used in a wide range of circuits, including both single-phase and three-phase circuits. It is also suitable for circuits with variable loads, such as induction motors. In addition, the FNQ-15/100 is also commonly used in high-voltage power supply systems.

Working Principle of FNQ-15/100 Fuse

The FNQ-15/100 fuse has a melting element with a consistent melting enthalpy that melts when a specific amount of current flows through it. This melting element is inserted into a sealed housing which has a contact pin surrounded by a surrounding arc which serves as an insulator. During normal operation, the contact pin and the surrounding arc are slightly separated, allowing a small amount of current to pass through. If the current exceeds the safe limit, the heat generated by the current will cause the melting element to melt quickly, reducing the contact between the arc and the contact pin, thus breaking off the current flow.

The FNQ-15/100 fuse also has the ability to quickly recover after an over-current occurs. Once the melting element has melted, the heat generated by the current will cause it to vaporize, creating a gaseous state which will quickly cool down once the power supply is cut off. Once the fuse has cooled down, it will reset itself, allowing it to be used again once the power supply is restored.

Conclusion

The FNQ-15/100 specialty fuse is a popular fuse used in various circuits due to its ability to quickly detect and interrupt excessive current. Its wide application range and quick recovery after an over-current make it highly suitable for many circuits. Understanding the working principle of this fuse can help electricians determine the most suitable protection device for their system.