6/10/2023 0 Comments Fuse typesThese wires are adjusted in such a way so that only one wire will melt at a time. The HRC fuse is of two types The tin-joint reduces the temperature under overloaded condition.įor increasing the breaking capacity of the fuses two or more silver wire is joined in parallel with each other. The fuse wire has two or more sections which are joint by using tin-joint. The silver and copper wire is used for making the fuse wire. The enclosure of the HRC fuse is filled with powdered pure quartz, which acts as an arc extinction medium. But the fuse element of the HRC fuses needs to be replaced after each operation, and it also produced the heat during the faults which will affect the operations of the nearby switches. HRC fuse has the high-speed operation and also does not require maintenance. The major advantage of HRC fuse is that it clears the low as well as a high fault current. If the fault is not clear, then the fuse element will melt and open the circuit. In such type of fuses, the fuse element carries the fault current for a long duration. Link Type Cartridge or High Rupturing Capacity The cartridge tip touches the conductor when it is completely screwed to the base and thus completes the circuit through the fuse links. The cartridge is kept in the fuse cap, and the fuse cap is fixed to the fuse base. The main parts of the D-type fuse are the base, adapter ring, cartridge and a fuse cap. These fuses are further classified as D-type cartridge fuses and the Link type cartridge fuses. The fuse element is totally enclosed in an enclosed container, and it has metal contacts on both sides. The fuse carrier can be easily inserted or taken out in the base without opening the main switch. The base of the fuse is made up of porcelain, and it holds the wires which may be made up of lead, tinned copper, aluminium or alloy of tin-lead. The fuse case and the fuse carrier are the two main parts of the rewirable fuse. This type of circuit is mostly used in the small current circuit or for domestic wiring. The low voltage fuses can be further divided into four classes shown below in the image Semi-enclosed or rewirable type and totally enclosed, or cartridge type switches are the most commonly used switches. Thus, the arc extinction in the AC circuit can be done easily as compared to the DC circuit. The frequency of the AC fuses changes it amplitude from 0º to 60º in very one second. The AC fuses are categorised into two types they are the low voltage fuses and the high voltage fuses. For reducing the DC fuse arcing the electrodes are placed more distance apart due to which the size of the fuse increases as compared to AC fuse. The only difficulty with the DC fuse is that the arc produced by the direct current is very difficult to extinct because there are no zero current flows in the circuit. The DC fuse opens or breaks the circuit when the excessive current flow through it.
0 Comments
Leave a Reply. |