Interrupting Rating or Breaking capacity.All the fuses are often characterized by the following characteristics. There are different types of Fuses available in the market for different types of applications like residential, industrial, automotive, etc. The following image shows the symbols of fuse along with their standards. For electrical drawings and circuits, there are three symbols of fuses we can use. The following image shows a block diagram of how a fuse is connected in the circuit.įuses are very simple and cheap devices that are being used for over hundred years as a protective equipment. This will disconnect the power supply and thus, the rest of the circuit is protected from being damaged. When the current in the circuit exceeds this permitted value (which may be caused due to overload, short circuit or load mismatch), this excessive current will melt the conductive element in the fuse and opens the circuit. The cross section area of this conducting material is designed such that it allows a certain amount of current that is permitted to flow in the circuit. A simple fuse consists of a small conductive material with low resistance and it is placed in series with the circuit. The principle of a fuse is based on the heating effect of the electric current. This is because, a fuse scarifies itself and reliably opens the circuit when there is an excessive current in the circuit or the circuit is under over load and if there is any short circuit. Fuses can be considered as a sacrificial element in the circuit as they act as a weak link in the entire circuit. Link Type Cartridge Fuse or High Rupturing Capacity (HRC) FuseĪ Fuse or an Electric Fuse is an Electrical / Electronic device that protects the circuit from different electrical faults like over current and overload.Cartridge Type Fuses or Totally Enclosed Type Fuses.Current Rating or Current Capacity of Fuse.
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