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　　What is the function of a fuse in a circuit

　　Fuses mainly play a protective role in circuits. In the event of a fault or abnormality in the circuit, as the current continues to rise and the rising electrode may damage certain important or valuable components in the circuit, it may also burn the circuit or even cause a fire. If the fuse is correctly placed in the circuit, it will melt to protect the circuit.

　　The main function of a fuse in a circuit is overcurrent protection, also known as short-circuit protection. A fuse is a simple and effective protective device that primarily serves as a short-circuit protection in electrical circuits.

　　Function of fuse:

　　1. Under normal circumstances, connect and disconnect the no-load and load currents in the high-voltage circuit

　　2. In case of system failure, it can cooperate with protective and automatic devices to quickly cut off the fault current, prevent the expansion of accidents, and ensure the safe operation of the system.

　　3. The function of a fuse is to use the heat generated by itself to melt and disconnect the circuit when the current exceeds the specified value. Fuses are widely used in high and low voltage distribution systems, control systems, and electrical equipment as short-circuit and overcurrent protectors, and are the most commonly used protective devices.

　　Characteristics of fuses:

　　1. Can be applied to high voltage levels.

　　2. Arc extinguishing media and methods include vacuum, low oil, high oil, and sulfur hexafluoride.

　　3. Strong arc extinguishing ability and good effect.

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