There are many types of fuses on the market today. In this article, we will briefly talk about the structure, working principle, advantages and uses of HRC fuses.
What is an HRC fuse?
Definition: The full name of the HRC fuse is High Rapturing Capacity, which is similar to an ordinary fuse, in which the short-circuit current carried by the fuse reaches a certain limit. A current-limiting fuse is a fuse that can safely cut off all possible currents within its cut-off rated current and current-limiting range. It limits the fusing time at the rated voltage to be equal to or less than the period of the first main wave or symmetrical current wave, and at the same time limits the passing current to less than the peak current. If the flow exceeds this value, it will burn. HRC fuses are made of glass or other types of compounds.
HRC fuse working principle
Under normal circumstances, the electric current would not generate enough heat to dissolve it. If the current through it exceeds its limit, the fault current will melt before the elements of the fuse reach their peak value. When a fuse is overloaded, the fuse components don't melt, but if that happens for a long time, materials like eutectics can melt and destroy the fuse element.
When the fuse is shorted, the thinner portion of the fuse element melts faster in a smaller area. It will crack before the eutectic material. Therefore, HRC is justified in providing limits within the fuse element.
Advantages of HRC fuses:
Cheaper compared to other fuses.
The design is simple and clear.
No maintenance of any kind is required.
easy work.
The program is ongoing.
High breaking capacity.
The instant characteristic is well suited for overload protection.
Application of HRC fuse:
Used to protect high voltage switchgear against short circuits.
For backup security.
This type of fuse is also used in motor stators.
Used for the protection of motors, transformers, automobiles, and other electrical appliances.