Temperature fuse When current flows through a conductor, the conductor will heat up because the conductor has a certain resistance. The calorific value follows this formula: Q = 0.24I2RT; In which q is calorific value, 0.24 is constant, I is current flowing through conductor, r is resistance of conductor, and t is time flowing through conductor. According to this formula, we can easily see the simple working principle of fuse.
After the fuse material and its shape are determined, its resistance R is relatively determined (regardless of its resistance temperature coefficient). When current flows, it will generate heat, and the heat generation will increase with time. The current and resistance determine the heating speed, and the structure and installation condition of the fuse determine the heating speed. If the heating speed is lower than the heating speed, the fuse will not blow. When the speed of generating heat is equal to the speed of consuming heat, it will not fuse even for a long time. When the speed of generating heat exceeds the speed of consuming heat, the generated heat increases.
In addition, due to a certain amount of heat and quality, the increase of heat is manifested as the rise of temperature, and the fuse blows when the temperature rises above the melting point of the fuse. This is how fuses work. The hyperbolic chord value of. According to this principle, when designing and manufacturing fuses, the physical properties of elected materials must be carefully studied to ensure the geometric dimensions are consistent. Because these factors play an important role in the normal operation of the fuse. Similarly, when using it, it must be installed correctly.
