Types Of Fuse!!! And How It Works?

Types Of Fuse! -:)> And How It Works?

We know that the main function of fuse is the protection of electrical equipments against high load current and any fault. There are generally three types of Fuse which is shown below

1. Rewireable Type Fuse
2. Cartridge Type Fuse
3. H.R.C. Type Fuse

1. Rewireable Type Fuse

• This type of fuse commonly used in house wiring. It is also known as kit kat type fuse. This type of fuse made of two porcelain parts
• 1- Base and
• 2- Fuse carrier

• The base is connected with switch board. Incoming wire is inserted from the one side and directly connected to the terminal wire. Outgoing terminal is taken from the other terminal and also is called onward connection.

• In base area, two terminal are connected through fuse wire which held in the fuse carrier.

2. Cartridge Type Fuse

This type of fuse have a totally enclosed area like a tube shape. The fuse wire is carried by the container and fill with powder which is sealed at its endside with metallic material. The perfect insulating path is provided by the power for the fuse which helps to absorb the arc when the blowing up of fuse. This type of fuse generally used at 415v power supply.



3. High Rupturing Capacity Fuse

• This type of fuses are used for heavy load at distribution system where heavy current can be flow. This type of fuse know as HRC Fuse very well. Operation of this type of fuse is very fast and also it will be absorb the heat very fast which is produced by the arc.

• HRC fuse consists ceramic cylinder ahaps body which resist the heat and consist heavy copper contacts at main body.

• Cylindrical body filled with non combustible powder which absorb the arc.

What Does A Fuse Or Breaker Do? 

Fuses and circuit breakers are designed to interrupt the power to a circuit when the current flow exceeds safe levels. For example, if your toaster shorts out, a fuse or breaker should "trip", protecting the wiring in the walls from melting. As such, fuses and breakers are primarily intended to protect the wiring.

Fuses contain a narrow strip of metal which is designed to melt (safely) when the current exceeds the rated value, there by interrupting the power to the circuit. Fuses trip relatively fast. Which can sometimes be a problem with motors which have large startup current surges. For motor circuits, you can use a "time-delay" fuse (one brand is "fusetron") which will avoid tripping on momentary overloads. A fusetron looks like a spring-loaded fuse. A fuse can only trip once, then it must be replaced











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