There are different types of fuses available in the market and they can be categories on
the basis of Different aspects.
Good to know: Fuses are used in AC as well as DC circuits.
In this video, I will go to show you Different Types of Fuses.
Fuses can be divided into two main categories according to the type of input supply voltage.
1.
AC fuses.
2.
DC fuses.
AC and DC Fuses.
There is a little difference between AC and DC Fuses used in the AC and DC Systems.
In a DC system, when the metallic wire Melts because of the heat generated by the overcurrent,
then ARC is produced and it is very difficult to extinct this ARC because of DC constant
value.
So in order to minimize the fuse arcing, DC fuse is a little bigger than an AC fuse which
increases the distance between the electrodes to reduce the arc in the Fuse.
On the other hand, i.e. in the AC system, voltage with 60Hz or 50Hz frequency changes
its amplitude from zero to 60 times every second, so arc can be extinct easily as compared
to DC.
Therefore, AC fuses are a little bit small in sizes as compared to DC fuses.
Fuses can also be categorized based on one time or multiple Operations.
1) One-time use Fuse.
2) Resettable Fuses.
One time use Fuse:
One time use fuses contain a metallic wire, which burns out when an overcurrent, overload
or mismatched load connect event occur, user has to manually replace these fuses, switch
fuses are cheap and widely used in almost all the electronics and electrical systems.
One time Other Types of Fuses.
Cartridge fuses: Cartridge fuses are used to protect electrical
appliances such as motors air-conditions, refrigerators, pumps, etc, where high voltage
ratings and currents required.
They are available up to 600A and 600V AC and widely used in industries, commercial
as well as home distribution panels.
There are two types of Cartridge fuses.
1.
General purpose fuse with no time delay, and 2.
Heavy duty cartridge fuses with time delay.
Both are available in 250V AC to 600V AC and its rating can be found on the end cap or
knife blade.
Blade Type fuses:
This type of fuses (also known as a spade or plug-in fuses) comes in a plastic body
and two metal caps to fit in the socket.
Mostly, they used in automobiles for wiring and short circuit protection.
to read more about Blade Type of HRC fuses, check this post.
Other Types of Fuses like SMD Fuses, Axial Fuses, Thermal Fuses, HRC (High Rupturing
Capacity) fuse, and High Voltage fuses.
Resettable Fuses: Resettable fuse is a device, which can be
used multiple times without replacing it.
They open the circuit when an overcurrent event occurs and after some specific time
they connect the circuit again.
Polymeric positive temperature coefficient device (PPTC, commonly known as a resettable
fuse, poly-switch, or poly-fuse) is a passive electronic component used to protect against
short current faults in electronic circuits.
Application of such fuses is overcome where manually replacing fuses is difficult or almost
impossible, e.g. fuse in the nuclear system or in the aerospace system.
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