Electrical Fuse Types Pdf

The fuse sizes in following chart began with the early automobile glass fuses thus the term ag.

Electrical fuse types pdf.

A major type of time delay fuse is the dual element fuse. A strip of this fuse is placed in series with the circuit. The basic purpose of the fuse is to protect and is composed of an alloy which has a low melting point. There are different types of fuses available in the market for different types of applications like residential industrial automotive etc.

Expulsion type hv fuse. In this article we will discuss the different types of fuses its construction working and operation and their application in various electronics and electrical systems. There are many types of fuses but the function of all these fuses is the same. Electrical fuse electrical protection electrical faults hrc fuses short circuit currents over currents.

To meet safety standards. This fuse consists of a short circuit strip soldered joint and spring connection. Knife type fuse consists of two blades that are placed in a hinged jaw. Introduction a fuse is one type of over current device that is designed to be a sacrificial element in an electrical power system.

The fuse sizes in following chart began with the early automobile glass fuses thus the term ag. The following table gives the maximum sizes of fuses that are recommended for two popular cables with copper conductors 70 c pvc k 115. It is developed for 11kv and their rupturing capacity is up to 250 mva. The renewable type fuses and automotive fuses appeared in 1914 and in 1927 littelfuse started making very low amperage fuses for the budding electronics industry.

The numbers were applied chronologically as. Electric fuse was invented by thomas alva edison in 1890. Knife type fuses are used in substations where it can control a large amount of current. A fuse or an electric fuse is an electrical electronic device that protects the circuit from different electrical faults like over current and overload.

The working principle is that if the current is in excess then the strip would melt and break the circuit. Construction of a knife blade type fuse. Their types applications what is a fuse. Protection and the fuses will provide the short circuit protection.

The renewable type fuses and automotive fuses appeared in 1914 and in 1927 littelfuse started making very low amperage fuses for the budding electronics industry. Basic types of electrical fuse fuse type there are three basic types of fuses. The two blades are inserted into the contacts with live wire to pass an electric current. 1 slow blow time lag time delay fuses 2 fast acting fuses 3 very fast acting fuses.

The maximum fuse size that can be used depends upon the type of cable used and is determined using the appropriate k factor.