High Voltage Fuse DIN Current Limiting Fuse XRNT 63A HRC Fuse IEC60282 12KV 24KV 36kv HRC fuse (high rupturing capacity fuse) is one kind of fuse, where the fuse wire carries a short circuit current in a set period. If the fault occurs in the circuit then it blows off. The HRC fuse is made with glass otherwise some other kind of chemical compound.
High Voltage Fuse DIN Current Limiting Fuse XRNT 63A HRC Fuse IEC60282 12KV 24KV 36kv
HRC fuse (high rupturing capacity fuse) is one kind of fuse, where the fuse wire carries a short circuit current in a set period.
If the fault occurs in the circuit then it blows off. The HRC fuse is made with glass otherwise some other kind of chemical compound.The enclosure of the fuse can be closed tightly to avoid the air from the atmosphere. At both sides of the fuse, the ceramic enclosure is made with a metal cap which is welded with fusible silver wire. Its enclosure includes some space that is surrounding by wire otherwise element of the fuse.
In normal conditions, the flow of current through the fuse doesn’t provide sufficient energy to soften the element. If the huge current flows through the fuse then it melts the element of the fuse before the fault current achieves the climax.
When the fuse is in an overload condition, then the element of the fuse will not blow-off however if this condition exists for an extended period, then the material like Eutectic will dissolve & break the element of the fuse. When the fuse is in short circuit condition, then the thin parts of the fuse element is less area will dissolve quickly & will smash before the eutectic material.
So this is the reason to provide the limitations within the element of HRC Fuse.
The construction of HRC fuse includes a material that has high heat resistant body like ceramic. This ceramic body includes metal-end caps that are welded through an element that carries silver-current.
The internal space of the fuse body is filled by a filling powder material. Here the material used in this is quartz, plaster of Paris, dust, marble, chalk, etc. So this is the reason the flow of current cannot overheat. The generated heat vaporizes the melted element. The chemical reaction will occur between filling power and silver vapor to result in high resistance material to help in reducing the arc within the fuse.
Generally, copper or silver is used as the fuse element because of its low specific resistance. This element has normally two or more sections. The fuse element normally has two or more sections that are connected through tin joints. The melting point of tin is 2400 C that is lesser than silver’s melting point of 980°C. Thus the melting point of tin joints stops the fuse from getting high temperatures in the short circuit and overload conditions.
