This article is told by the fuse manufacturer,What material is the fuse link wire made of? Is a fuse link wire the same as a fuse? Fuse symbols and graphics, The reason for the blown fuse link wire, What is the fuse link wire for?
What material is the fuse link wire made of?
The fuse in the fuse is made of pure copper wire or pure silver wire for small current and made of pure copper sheet (belt) or pure silver sheet (belt) for high current. The fuse is called Wude alloy, its melting point is 70°C, and it is often used as a fuse for circuit protection devices. When the current of the circuit is too large. The temperature of the fuse is raised to its melting point, thereby melting it. The circuit forms an open circuit.
Is a fuse link wire the same as a fuse?
A fuse link wire is a fuse, but a fuse is not necessarily a fuse. From a structural point of view, the fuse will be more complete and belongs to a complete electronic component, while the fuse is equivalent to a semi-finished electronic component, so many semi-finished electronic components with the function of a fuse can be fuses instead of called fuse.
Fuse symbols and graphics
The text symbol of the fuse is FU, and the text symbol of the old fuse is represented by RD.
A fuse is an electrical appliance that fuses the fuse with the heat generated by itself and disconnects the circuit when the current exceeds the specified value.
After the current exceeds the specified value for some time, the fuse will melt with the heat generated by itself, thereby disconnecting the circuit. It is a current protector made by using this principle.
Fuses are mostly used in high-voltage and low-voltage power distribution systems, control systems, and electrical equipment. As short-circuit and over-current protectors, fuses are one of the most commonly used protection devices.
The reason for the blown fuse link wire
1. Exceeding the rated power
Generally, the fuse has a maximum carrying power value. If the power of the electrical equipment exceeds this value, the fuse will blow to protect the electrical equipment. Before using the fuse, you can first calculate the total power of the electrical equipment and the maximum power that the wires used can carry, and then decide how thick the fuse should be. When using electrical equipment, try to avoid using each electrical equipment at the same time.
2. The fuse is too thin
If the fuse is too thin, the carrying power will be smaller, so once a large current passes through, the fuse will break immediately.
3. Poor contact or oxidation
Poor contact or oxidation in the line or switch will cause the fuse to burn out. If this problem occurs, use a screwdriver to tighten all the terminals.
4. There is a short circuit in the circuit
There is a short circuit problem in the circuit, because the short circuit current will be greater than the maximum current that the fuse can carry, and it is easy to blow the fuse. If the circuit is found to be short-circuited, it is best to check where the to short-circuit occurs as soon as possible, and repair it as soon as possible to reduce the impact on life.
What is the fuse link wire for?
The function of the fuse is to fuse quickly when overload and short circuits occur within its protection range, to avoid causing major electrical accidents, and cut off the power supply so that the fault will not expand and reduce the damage to electrical appliances.