|Home | Articles | Forum | Glossary | Books|
Several types of fuses are available for various applications in motor control systems. The two main types of fuses are cartridge and plug fuses. Figure 1 shows several cartridge and plug fuses in different sizes. Some of these fuses provide blades to make connections in the fuse holders, and other fuses provide connections at the neck of the fuse. The plug fuse comes in several sizes, embossed on the current rating of the fuse. A rejection feature is provided on cartridge, blade, and plug fuses. Examples of the rejection features are also shown in this figure. The rejection feature prevents a fuse with a larger current rating from being substituted for the fuse of a smaller size that was originally specified.
This is accomplished by providing a matching rejection feature in the fuse holder that is mounted in the fuse box with the feature that is provided for the fuse size. That is, each size of fuse has a different type of rejection feature, or it's located at a different point on the fuse body for each amperage rating.