Types of Fuse

Types of Fuse Points : Types of Fuse, Kit-cat type or Rewireable fuse, Cartridge type fuse, H. R. C (High Rupturing Capacity) fuse Following are the types of fuse, such as:
1. Kit-cat type or Rewireable fuse
2. Cartridge type fuse
3. H. R. C (High Rupturing Capacity) fuse 1. Kit-Kat Type or Rewireable Fuse This is commonly used in house wiring and power wiring up to 440 volts. It is made of porcelain in two parts i.e. base and fuse carrier. The base is fixed with switchboard. The phase or incoming wire is connected to its one terminal. The connection is taken from the other terminal is known as outgoing terminal. The two terminals inside the base are connected by fuse wire, which is held in fuse Carrier. The fuse wire can easily be replaced if fuse blown out. Parts of Rewireable Fuse 1. Fuse carrier
2. Fuse carrier contact
3. Fuse element
4. Asbestos tube
5. Fuse base contact
6. Fuse base 2. Cartrridge Type Fuse This is totally enclosed type fuse. The fuse element or wire is enclosed in an insulating container of tube shape. This is filled with powder and sealed at its ends with metallic caps known as cartridge. It is not possible to rewire it. It is available for voltage up to 660 volts and current rating 800 Amperes. The powder provides good insulating path and helps to extinguish the are at the time of blowing up of fuse. It is not very economical. Parts of Cartridge Type Fuse 1. Fuse cap
2. Cartridge
3. Adaptor ring
4. Fuse base 3. H.R.C (High Rupturing Capacity) Fuse In modern power station, extremely heavy current would flow due to the fault. Therefore, HRC fuse units are used for such duties. These fuses are specially designed for extremely rapid operation. Parts of HRC Fuse 1. Filling powder
2. Bi-metal thermal control
3. Fuse element
4. Fuse link contact
5. Brass end cap
6. Cartridge
7. Outer element

It has ceramic body with metallic end caps. Fuse element is placed inside and welded to end caps. Powder is filled in it, which helps in extinguishing the fire.