24-06-21 Fuse

Fuse:- A fuse is a metal wire whose melting point is low & the conductivity is high.

Generally, when high current flows, it melts & breaks the circuit against overload & short circuit.

Fuse is a primary protection device against short circuit fault.

Benefits of fuse:- 

1) Fuse is cheapest type of protection device in an electric circuit.

2) Fuse needs zero maintenance.

3) Operation of fuse is very simple.

4) It's operation is completely automatic & requires less time as compared to circuit breaker.

Types of Fuse:-

 

1) Low Voltage Fuses

a) Rewirable fuse (kit kat)

b) Enclosed H.R.C fuse

2) High Voltage Fuses

a) Cartridge fuse

b) Liquid type fuse

Glass Fuse

Kit Kat Fuse

Why Fuse Is Connected In Phase Wire?

When fuse connected in neutral wire then excess current flows from phase wire to load (device) & return from the neutral wire then fuse blows & device will be damage, that's why Fuse always connected in phase.