draw different types of fuses and write use of every type (Two or Three sentences for Each )
Answers
Answer:
A fuse is probably the simplest electrical device, but its function is critical in protecting electrical circuits from damage. Fuses are found in every circuit in one form or another in various shapes, sizes, and ratings. In this article, we will learn how a fuse works and about the different types of the fuse.
How does a fuse work?
The primary job of a fuse is to break the circuit if a current higher than desired is drawn by the circuit, thus preventing damage due to short circuits.
The simplest kind of fuse consists of a resistive element, selected carefully for its melting point. When a current passes through this element, a small voltage drop (small enough so the circuit downstream won’t be affected) is created across the element, and some power is dissipated as heat. The temperature of the element thus increases. For normal currents, this temperature increase is not enough to melt the filament. However, if the current draw exceeds the rated current of the fuse, the melting point is quickly reached. The resistive element melts and the circuit is interrupted. The thickness and length of the resistive element determine the rated current.
Fuse elements are made of zinc, copper, silver, aluminium or other alloys to provide predictable trip currents. The element must not oxidize or corrode over time.
Symbol of a Fuse
The standard IEEE/ANSI symbols for the fuse is as follows:
Fuse Symbol
However, the IEC fuse is slightly different:
Symbol of Fuse
Explanation: