0216002.TXP

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Fuses have been used as current-limiting protective devices for centuries. The 0216002.TXP application field and working principle of fuses are explained in this paper.

The 0216002.TXP application field mainly includes circuit protection. The fuse is a current-limiting device, which limits the current in the circuit when the circuit has an overload or short circuit fault, or limit the current during normal working conditions, so as to protect the circuit, ensure the safe operation of the circuit and prevent fire. It can also be used as a signaling device in the circuit. When a fault occurs, the fuse will be Normal burning, so that users can understand the fault of the circuit quickly.

The working principle of a fuse is that it is a safety device with high melting point. Its resistance line is made of metal alloy with high melting point. When the current exceeds the rated current, the wire will be heated and reach its melting point, so that the circuit will be cut off. For larger current, it can also be applied in series. It can reduce the current-carrying capacity of the fuse and protect the circuit. In addition, the fuse should be selected according to the rated voltage of the equipment.

The conventional current-limiting protective device is a fuse, which consists of a fuse body and a fuse element. There are two kinds of fuse elements, one is a blade fuse with an internal fuse element; the other type is an external fuse element, also called an external fuse. The working process of the fuse is to heat and melt the fuse wire when the current is too large, so as to protect the circuit. This kind of fuse is mainly used in AC circuit, and its rated voltage is 110V, 220V, 380V and other AC voltage.

In addition, there are some special applications of fuses, such as miniature fuses. Miniature fuses are used to protect circuits that have only one control or drive signal line, or circuits with multiple control and drive signal lines and high-current shut-off safety. In addition, some circuits with low power, strict requirements on closed circuit current and reliable protection with special requirements are also protected by miniature fuses.

At present, in the fields of low-voltage AC circuit protection, 0216002.TXP application field and working principle of fuses are widely used. Its main function is to protect the circuit, components or equipment from overload or short circuit damage by limiting the current in the circuit. It is common for single-phase and three-phase circuits.

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