What can not be used for fuse?
When the current flows through the conductor, the conductor will be heated because of the resistance of the conductor. And heat follow this formula: Q=0.24I2RT; Q is the heat, the 0.24 is a constant, I is the current flowing through the conductor, R is the resistance of a conductor, T is the current through the conductor time; so the formula we can see that the principle of simple fuse. A fuse that determines the resistance of a fuse when its material and its shape are determined, regardless of its resistance temperature coefficient (R). As the current flows through it, it heats up and increases with time. The size of the current and the resistance heat generating speed, fuse structure and its installation condition to determine the heat dissipation rate, if the speed is less than the heat generated in the heat dissipation rate, the fuse is not fuse. If the rate at which heat is produced is equal to the rate at which heat is dissipated, it will not fuse for a considerable length of time. If the rate of heat generation is greater than the rate of heat dissipation, the heat will increase. And because it has a specific heat and mass, the increase in heat is reflected in the rise in temperature. When the temperature rises above the fuse point, the fuse will fuse. That's how the fuse works. You should know from this principle that you must study the physical characteristics of your chosen materials carefully and ensure that they have the same geometric size when designing and manufacturing fuses. Because these factors play an important role in the normal operation of the fuse. Also, you must install it correctly when you use it.
Fuse made of nickel chromium alloy wire, its melting point is low, in the case of high voltage will fuse, thereby disconnecting the circuit, to protect the purpose of the circuit!
Fuses must not be replaced by iron or copper.
