How to Judge if a Fuse is Broken

. There are many reasons why a fuse may blow, either because of a short circuit fault, too much electricity, or because of the quality of the fuse itself. After the fuse is blown, the first thing to do is to investigate the cause of the malfunction, and then replace the treatment, you can look at the appearance, test with a digital multimeter, replacement method or shorting method to determine whether the fuse is damaged or not.

The purpose of a fuse is to protect the circuit.When a fuse blows, the circuit is cut off and the appliances in your home become inoperable. There are many reasons why a fuse may blow, either because of a short circuit fault, too much electricity, or because of the quality of the fuse itself. After the fuse is blown, the first thing to do is to investigate the cause of the malfunction, and then replace the treatment, you can look at the appearance, test with a digital multimeter, replacement method or shorting method to determine whether the fuse is damaged or not.

First, why the fuse will blow

Fuse as a circuit protection device is essential, if the fuse is blown, then it will trip, can not use electrical appliances, you need to replace the new fuse, there are many reasons why the fuse is blown, the common general is:
1, the home’s electrical wiring or socket short-circuit failure.
2, too much power consumption, overloaded electricity.
3, the quality of the fuse itself, resulting in easy to be blown.

Second, how to measure the fuse good or bad

Now that the power outage is less, the home tripped the first thought is not a blown fuse, then how to determine whether the fuse can be used normally?
1, look at the appearance
View the appearance of the fuse, if there is burnt, burnt, or smell the odor of burning, it means that the fuse is broken, to be replaced with a new one.
2, digital multimeter test
Some fuses can not be seen from the appearance of bad or not bad, then you can use the digital multimeter resistance file (R file) for testing, red and black pens were contacted on both ends of the fuse being tested, the test does not respond to the description of the fuse is bad, need to be replaced.
3、Replacement method
Replace a new fuse, if it can work normally, then the fuse is bad.
4、Short connection method
Directly with one or two small copper wire short fuse ends, power to observe the work of electrical appliances, if normal, then the fuse is bad, but this method has a certain degree of danger, it is recommended to use caution.