Common Sense for Fuses
A fuse refers to a self destructing fuse that experiences significant surges or other current eXCeeding limits in a circuit; In order to protect the components of other parts of the circuit where the fuse is located and the equipment is normal, the cost of replacing the fuse can be ignored compared to replacing the entire circuit that may be damaged. Due to the fact that Fuses are a common element that needs to be replaced, we will introduce two basic concepts and provide a more in-depth introduction to fusion applications and testing and diagnostic methods. Please refer to the relevant articles on the website.
Common Sense 1: Determine if the fuse is burning (fuse)?
If the fuse can be removed from the circuit, it can be a visual Shenzhen fuse to determine whether it has burned out; The simplest method to determine whether a fuse is a continuity test is to blow other materials. Quickly test with a multimeter to determine if it is working properly, by hearing a beep and touching the wires together, or seeing a 0 ohm reading. After confirming that the circuit power is turned off, place the leads at both ends of the fuse. If you hear the same beep and the resistance reading of the multimeter is very low, then the fuse will not blow. If you don't hear the beep and the meter reading is OL, the fuse will blow. Take reasonable preventive measures to stay away from dangerous voltages. Supply the power circuit and switch to the multimeter voltage measurement mode. Ensure that DC circuits are selected for DC and AC circuits are selected for AC Connect the multimeter leads on both sides of the fuse. If the indicated voltage is small or even not, the fuse is intact. However, if a voltage difference (usually full supply voltage amplitude) exists, the fuse is blown.
Common Sense 2: How to replace fuses correctly?
It is best to use the original model of the same specification to replace the faulty fuse. If there are no fuses of the same specification, please pay attention to whether the type of fuse used is fast or slow. Usually, slow melting fuses can be blown into place quickly (rather than temporarily used), but the opposite has never happened. Slow fuse for inductive circuits. Starting a motor (excluding frequency conversion) is an example, although the rated current of the motor is low, when the starting current is 3-7 times the rated current. When driving a slow fuse, a large current can be allowed for a short period of time, but the time should be very short. In this case, if a quick fuse is used, it will immediately disconnect the current.
Fig.1
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