fuse types and uses pdf

Fuse types and uses pdf

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Chapter 12 - Physics Of Conductors And Insulators

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Types of Fuses

Chapter 12 - Physics Of Conductors And Insulators

In electronics and electrical engineering , a fuse is an electrical safety device that operates to provide overcurrent protection of an electrical circuit. Its essential component is a metal wire or strip that melts when too much current flows through it, thereby stopping or interrupting the current. It is a sacrificial device ; once a fuse has operated it is an open circuit, and must be replaced or rewired, depending on its type. Fuses have been used as essential safety devices from the early days of electrical engineering. Today there are thousands of different fuse designs which have specific current and voltage ratings, breaking capacity, and response times, depending on the application. The time and current operating characteristics of fuses are chosen to provide adequate protection without needless interruption.

He was the person who suggested the utilization of reduced part of conductors to guard telegraph stations against the hits of lighting with liquefying, the slighter wires would guard equipment along with wiring in the building. In the year , lighting installations and telegraph cables can be protected by employing a variety of foil fusible essentials and wires. At the end, Thomas Alva Edison earned rights for a fuse which is an element of his electric distribution system in the year And now, this article discusses fuse , types of fuses, and its applications in various fields. In the field of electronics or electrical, a fuse is considered as the most crucial device which is employed in various electrical circuits that give protection from the overcurrent conditions. The device is included with a metal strip where it gets dissolved when there is a flow of an extended range of current values. Because of the metal dissolving, the circuit becomes an open circuit and disconnects the flow of power supply through the device.

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Fuses can be considered as a sacrificial element in the circuit as they act as a weak link in the entire circuit. This is because, a fuse scarifies itself and reliably opens the circuit when there is an excessive current in the circuit or the circuit is under over load and if there is any short circuit. The principle of a fuse is based on the heating effect of the electric current. A simple fuse consists of a small conductive material with low resistance and it is placed in series with the circuit. The cross section area of this conducting material is designed such that it allows a certain amount of current that is permitted to flow in the circuit. When the current in the circuit exceeds this permitted value which may be caused due to overload, short circuit or load mismatch , this excessive current will melt the conductive element in the fuse and opens the circuit.

CART 0. ISO Registered. Term Search:. Fuse type 2. Fuse type 24 Type A 60 volt DC fuse designed for the telecom industry.

The fuse is the current interrupting devices which break or open the circuit by fusing the element and thus remove the faulty device from the main supply circuit. The fuses are mainly classified into two types, depends on the input supply voltages they are the AC fuses and the DC fuses. The different types of the fuses are shown in the image below. The DC fuse opens or breaks the circuit when the excessive current flow through it. The only difficulty with the DC fuse is that the arc produced by the direct current is very difficult to extinct because there are no zero current flows in the circuit. For reducing the DC fuse arcing the electrodes are placed more distance apart due to which the size of the fuse increases as compared to AC fuse.

Types of Fuses

Electric fuse was invented by Thomas Alva Edison in There are many types of fuses, but the function of all these fuses is the same. 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. Related Posts:. A general Fuse consists of a low resistance metallic wire enclosed in a non combustible material.

Normally, the ampacity rating of a conductor is a circuit design limit never to be intentionally exceeded, but there is an application where ampacity exceedance is expected: in the case of fuses. A fuse is an electrical safety device built around a conductive strip that is designed to melt and separate in the event of excessive current. Fuses are always connected in series with the component s to be protected from overcurrent, so that when the fuse blows opens it will open the entire circuit and stop current through the component s. A fuse connected in one branch of a parallel circuit , of course, would not affect current through any of the other branches. Normally, the thin piece of fuse wire is contained within a safety sheath to minimize hazards of arc blast if the wire burns open with violent force, as can happen in the case of severe overcurrents.

Different Types of Fuses

Fuses are the protectors, these are the safety devices which are used to protect the home appliances like televisions, refrigerators, computers with damage by high voltage. The fuse is made up of thin strip or strand of metal, whenever the heavy amount of current or an excessive current flow is there in an electrical circuit, the fuse melts and it opens the circuit and disconnects it from the power supply. Also, it works as a circuit breaker or stabilizer which protects the device from damage. In the market, many types, features, and design of fuses are available nowadays. Fuses are used for the prevention of home appliances from the short circuit and damage by overload or high current etc. The lives of television, computers, radios and other home appliances may also put at risk. When the fuse goes, a sudden spark occurs which may lead to turning your home into sudden darkness by disconnecting the power supply which saves any further mishappenings.

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  • Aglaya G. 18.11.2020 at 02:21

    ELECTRICAL FUSES: THEIR TYPES &. APPLICATIONS. What is a fuse? The basic purpose of the fuse is to protect and is composed of an alloy which has a.

  • FrГ©dГ©ric F. 21.11.2020 at 07:35

    Many different Fuse-Links, for example in special dimensions, as well as a wide range of accessories round up the portfolio.

  • Prictojolning1979 21.11.2020 at 23:02

    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.


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