How fuses work
Release time:
2023-07-04 14:49
When the current flows through the conductor, because the conductor has a certain resistance, the conductor will heat up. And the calorific value follows this formula: Q=I2RT; Where Q is the calorific value, 0.24 is a constant, I is the current flowing through the conductor, R is the resistance of the conductor, and T is the time the current flows through the conductor. According to this formula, we can easily see the simple working principle of the fuse. When the material and shape of the fuse are determined, its resistance R is relatively determined (if its resistance temperature coefficient is not considered). When an electric current flows through it, it heats up, and its heat output increases over time. The size of the current and resistance determines the speed of heat generation, the structure of the fuse and its installation determines the speed of heat dissipation, if the speed of heat generation is less than the speed of heat dissipation, the fuse will not be blown. If the speed of heat generation is equal to the speed of heat dissipation, it will not fuse for a long time. If the rate of heat generation is greater than the rate of heat dissipation, more and more heat will be generated. And because it has a certain specific heat and mass, the increase in its heat is reflected in the increase in temperature, and when the temperature rises above the melting point of the fuse, the fuse is blown. That's how fuses work. We should know from this principle that when you design and manufacture fuses, you must carefully study the physical properties of the materials you choose and ensure that they have a consistent geometric size. Because these factors play a vital role in the normal operation of the fuse. Again, when you use it, be sure to install it correctly.
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