The conventional fuse of Dismann brand consists of four parts:
One is the melt link. This is the core part of the fuse, which will cut off the current when it is blown;
One is the electrode, usually two. It is a component connecting the melt and the circuit. It must have good conductivity and should not produce obvious installation contact resistance;
The third is the support. The melt of fuse is generally thin and soft with little strength. The function of the support is to fix the melt and make the two parts become a rigid whole, which can be installed and used dry. The bearing must have good mechanical strength, insulation, heat resistance and flame retardance, and shall not have fracture, deformation, combustion and short circuit during use.
The fourth is arc extinguishing device. Fuses used in power circuits and high-power equipment include not only three parts of general fuses, but also arc-extinguishing devices. Such circuits or equipment not only work with large flow, but also have high white beds at both ends when the melt is melted. In the dark, the melt is often melted (fused) or even vaporized, but the current is not cut off. The reason is that at the moment of fusing, under the action of high voltage and high current, the arcing occurs between the two electrodes of the fuse, and the arc maintains the continuity of the circuit, but does not play a protective role. The arc extinguishing device must have strong insulation and good thermal conductivity. Quartz sand is a commonly used arc extinguishing material.
In addition, fuse indication device can be designed and installed on the fuse body. Some fuses have fusing indication devices, which can be easily found by maintenance personnel due to certain appearance changes of the base itself after fuse action (fusing). For example: light emitting, color changing, ejecting solid indicator, etc.