A fuse is used in an electric circuit to full version


  • Fuse and Types of Fuses – Construction, Operation & Applications
  • Advantages & Disadvantages of Fuse in a Electrical Circuit
  • Electric Circuits: Components, Types, and Related Concepts
  • What is Fuse : Different Types and Its Applications
  • Fuse and Types of Fuses – Construction, Operation & Applications

    Below is the brief explanation of the above categories. Fuse Current Carrying Capacity Current carrying capacity is the amount of current which a fuse can easily conduct without interrupting the circuit.

    Breaking capacity: The value of maximum current that can safely be interrupted by the Fuse is called Breaking Capacity and should be higher than the prospective short circuit current. Rated Voltage of Fuse Expect the current capacity of current, there is the maximum voltage rating a fuse can handle safely.

    Each fuse has maximum allowed voltage rating, for example, if a fuse is designed for 32 volts it cannot be used with volts, different amounts of isolation is required in different fuses working on different voltage levels. I2t Value of Fuse The I2t terms related to fuse normally used in short circuit condition. It is the amount of energy which carries the fuse element when the electrical fault is cleared by the fuse element.

    Response Characteristic of a Fuse The speed at which the fuse blows, depends on the amount of current flowing through its wire. The higher the current flowing through the wire, faster will be the response time. Response characteristic shows the response time for an overcurrent event. Fuses which respond rapidly to the over current situation is called ultra fast fuses or Fast fuses.

    They are used in Many semiconductor devices because semiconductor devices are damaged by over current very rapidly. There is another fuse which Is called a slow burn fuse, switch fuses do not respond rapidly to the over current event, but blow after several seconds of over current occurrence.

    Such fuses found their application in motor control electronics systems because motors take a lot more current at starting than running. Packaging Size As we have mentioned above, AC and DC fuses have a little bit different packaging type, in the same way different applications require different packages to be used accurately in the circuit. One time use fuses contain a metallic wire, which burns out, when an over current, over load or mismatched load connect event occurs, the user has to manually replace these fuses, switch fuses are cheap and widely used in almost all the electronics and electrical systems.

    On the other hand, the Resettable fuse automatically reset after the operation when fault occurs at the system. In the Current limiting fuse, they produce high resistance for a very short period while the non — current limiting fuse produces an arc in case of high current flow to interrupts and limit the current in related and connected circuits.

    DC Fuses In a DC system, when the metallic wire melts because of the heat generated by the over current, then Arc is produced and it is very difficult to extinguish this arc because of DC constant value. So in order to minimize the fuse arcing, DC fuse are little bigger than an AC fuse which increases the distance between the electrodes to reduce the arc in the Fuse. AC Fuses On the other hand, i.

    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. Related Post: Fuse, Circuit Breaker and Protection Symbols Cartridge Fuses Cartridge fuses are used to protect electrical appliances such as motors, air-conditions, refrigerator, pumps etc, where high voltage rating and currents are required. They are available up to A and V AC and widely used in industries, commercial as well as home distribution panels.

    There are two types of Cartridge fuses. General purpose fuse with no time delay and 2. Heavy-duty cartridge fuses with time delay. Cartridge Fuses are enclosed in a base and can be divided further in Link type cartridge fuses and D Type Cartridge Fuses.

    Fuse base is connected to the fuse cap where the cartridge is inside the fuse cap. The circuit is completed when the tip of the cartridge makes contacts through the fuse link conductor.

    Types of HRC fuse.

    Advantages & Disadvantages of Fuse in a Electrical Circuit

    Indeed, all the simple modern marvels are a consequence of this scientific principle. Read on to understand more on the components, types, and other concepts related to electric circuits. A diagram of a simple open and closed electric circuit. It is a very simple concept that incorporates three different components—a source of electrical energy, a device, and a closed loop of conducting material.

    Source of Electrical Energy The first component in an electric circuit is the source of electrical energy that allows electrons to move. This push of electric charge is called voltage whose potential is measured in volts. Device in the Electric Circuit The second component is the device.

    It responds to the current passing through it. Today, a device is something that can be plugged into a wall socket and used with electricity. The loop is generally closed using a piece of conducting material. It is usually a wire but there are other kinds of materials that can close the loop too.

    For example, there are various strips of metal inside the television that have been deposited onto a plastic surface that may be the conducting material or even in some cases, the chassis of a device that becomes part of the closed circuit. Resistance of the Electric Circuit The third component is the resistance; every circuit has some resistance to the flow of electrons.

    Electrons collide with other electrons and atoms that make up the wire and they, thus, convert some of their energy to heat. It is simply not possible to transfer energy from one form to another without losing some of that energy as heat. Learn more about electromagnetism. Flashlight as an Electric Circuit The flashlight is a simple device that incorporates all three of these components. The two batteries in the flashlight are the source. The light bulb at the end of the flashlight is the device into which the current flows.

    Current flows through a very tiny filament which heats up to a very high temperature because of the electrical resistance. As a result, the filament glows brightly. The circuit is finally completed by a strip of metal that goes down the side barrel of the flashlight. There is also a coil of wire at one end of the flashlight and at the other end there are the contact points for the battery as well as the other strip of wire that together complete the circuit.

    A simple electric circuit has a source, device, resistance, and a switch. A switch is merely a device that helps to break the continuous loop of the conducting material. When the switch is open, there is no flow of current but when the switch is closed, there is a flow. Basically, all circuits work like this. A fuse or a circuit breaker is used to prevent major fires due to overloads.

    A fuse is designed to burn up if the current gets too high. Learn more about the first law of thermodynamics. Types of Electric Circuits There are two types of circuits found in homes and other common devices; namely series circuits and parallel circuits. Series Circuits— Series circuits consists of several devices, each of them linked up one after another after another in just a single large loop. Though,different devices have different voltages across them, the same current flows through every device in the series circuit.

    If any one of the devices in a series circuit is broken, the whole circuit fails. For instance, if there are three light bulbs connected in a series, in just one loop of wire connected to a battery. If one light bulb is unscrewed, the whole circuit fails. Parallel Circuits —In parallel circuits, different devices are arranged so that a single source supplies voltage to separate loops of wire.

    The voltage in every device across the circuit is exactly the same, but in general different devices are going to see different currents. In this case, each device is going to work even if the other ones fail. For instance, if two light bulbs are linked up in parallel and one is unscrewed, the other one will work. This is a transcript from the video series The Joy of Science. Watch it now, on Wondrium. Learn more about entropy. Michael Faraday was an English scientist who contributed to the study of electromagnetism and electrochemistry.

    He was able to demonstrate that all of these different forms of electricity produced exactly the same kind of phenomenon and resulted from the movement of electrons. Faraday concluded that all forms of energy produced sparks, can flow through wires, and can be made to do work. His research also showed for the first time that animal electricity of an electric eel, the electricity coming from a battery, and the electricity of lightning were all one and the same phenomenon.

    Electric Current and Power The flow or movement of electrons through the electrical circuit is called the electrical current. Current is measured in amperes. One ampere corresponds to about 6 billion electrons passing a point in that circuit every second. Another important term associated with electricity is power. Power is defined as work divided by time. In an electrical circuit power equals current voltage, measured in watts.

    The higher the wattage, the faster the energy consumed by that object, be it a light bulb, an amplifier, or any electrical device.

    When current flows through a very tiny filament, it heats up to a very high temperature because of the electrical resistance. This causes the filament to burn brightly and, thus, the light bulb in the flashlight glows. Q: How are fuse and circuit breakers helpful? Fuse and circuit breakers are designed to prevent electrical equipments from being damaged due to overload. While fuses need to be replaced after an overload, circuit breakers need to be just reset.

    Q: What is an electric current? The flow of electrons through an electrical circuit is called the electrical current and is measured in amperes. Q: Why did Christmas tree light chain of olden days become useless even if one bulb burned out? The Christmas tree lights of olden times were a series type of circuit where if one bulb did not work, the whole circuit would fail.

    However, modern Christmas tree lights follow the principle of parallel circuits Keep Reading.

    Packaging Size As we have mentioned above, AC and DC fuses have a little bit different packaging type, in the same way different applications require different packages to be used accurately in the circuit. One time use fuses contain a metallic wire, which burns out, when an over current, over load or mismatched load connect event occurs, the user has to manually replace these fuses, switch fuses are cheap and widely used in almost all the electronics and electrical systems.

    On the other hand, the Resettable fuse automatically reset after the operation when fault occurs at the system. In the Current limiting fuse, they produce high resistance for a very short period while the non — current limiting fuse produces an arc in case of high current flow to interrupts and limit the current in related and connected circuits. DC Fuses In a DC system, when the metallic wire melts because of the heat generated by the over current, then Arc is produced and it is very difficult to extinguish this arc because of DC constant value.

    So in order to minimize the fuse arcing, DC fuse are little bigger than an AC fuse which increases the distance between the electrodes to reduce the arc in the Fuse. AC Fuses On the other hand, i. 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. Related Post: Fuse, Circuit Breaker and Protection Symbols Cartridge Fuses Cartridge fuses are used to protect electrical appliances such as motors, air-conditions, refrigerator, pumps etc, where high voltage rating and currents are required.

    Electromagnetic induction causes a more subtle problem that is solved by grounding the case. The AC current in appliances can induce an emf on the case. If grounded, the case voltage is kept near zero, but if the case is not grounded, a shock can occur as pictured in Figure 5. Current driven by the induced case emf is called a leakage current, although current does not necessarily pass from the resistor to the case.

    Figure 5. AC currents can induce an emf on the case of an appliance.

    Electric Circuits: Components, Types, and Related Concepts

    The voltage can be large enough to cause a shock. If the case is grounded, the induced emf is kept near zero. A ground fault interrupter GFI is a safety device found in updated kitchen and bathroom wiring that works based on electromagnetic induction. Then some of the current, again called a leakage current, is returning to the voltage source by a path other than through the neutral wire. It is assumed that this path presents a hazard, such as shown in Figure 6.

    GFIs are usually set to interrupt the circuit if the leakage current is greater than 5 mA, the accepted maximum harmless shock. Figure 6.

    What is Fuse : Different Types and Its Applications

    Figure 7 shows how a GFI works. If not, then the circuit breaker will trip. Figure 7. A GFI compares currents by using both to induce an emf in the same coil. If the currents are equal, they will induce equal but opposite emfs.

    Another induction-based safety device is the isolation transformer, shown in Figure 8. Most isolation transformers have equal input and output voltages. Their function is to put a large resistance between the original voltage source and the device being operated. This prevents a complete circuit between them, even in the circumstance shown. There is a complete circuit through the appliance. The appliance is isolated from the original voltage source by the high resistance of the material between the transformer coils, hence the name isolation transformer.

    For current to flow through the person, it must pass through the high-resistance material between the coils, through the wire, the person, and back through the earth—a path with such a large resistance that the current is negligible. 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 yearlighting 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 fusetypes of fuses, and its applications in various fields.

    What is Fuse? 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. It is also termed as an automatic disconnection of supply that is frequently shortened to ADS.

    This is the cheaply available device that is implemented for protecting the electrical circuits in the conditions of either circuit short or high range of current magnitudes. These are used to prevent the home appliances from the high current or overload damage. When the fuse gets break or damage, then an abrupt sparkle happens which may direct damage your home appliances.

    That is the major reason we require different types of fuses to guard our home-appliances against damage. There are many types of fuses used for circuit protection. Fuses are generally rated in Amperes.

    Even though their functionality is based on the self-production of the heat in the scenarios of additional current through their own developed electrical resistance. This can be generally achieved by making the fuse wire length to be as short as possible. As the wire length is not dependent on current rating values, the minimal length of wire imposes the minimal value of resistance. Characteristics of Fuses There are few characteristics for the fuses in the electric domain and those are explained as below: Current rating value — The frequent conduction of the maximum amount of current which holds the device without making it as molten is termed as current rating value.

    The measurement value is in amperes and has thermal characteristics. Voltage rating value — Here, voltage is in series connection with the fuse which does not augment the voltage rating value. Temperature — Here, the functional temperature of the fuse is more so that the current rating drops down.

    This makes the fuse to get molted. Voltage drop — When there is additional current flow through the device, the fuse gets molted and makes it as an open circuit. As because of this, there will be a change in resistance and the voltage drop becomes minimal. It is fabricated with a lean strip or thread of metallic wire. The connection of the Fuse in an electrical circuit is always in series.

    When there is the production of a high level of current electrical circuits, the fuse gets soften and it makes the circuit be in an open condition. The extreme flow of current may direct to the collapse of the wire and prevents the supply. The working scenario of this device is mainly dependent on the heating condition of the current. In the general functioning of the current, there will be a normal flow of the current through the fuse.

    Because of the current flow, heat will be developed in the fuse element and the generated heat will be dissipated into the atmosphere. Due to this, the temperature level of the heat is maintained less than the melting point values. Whereas in the fault conditions, there will be a flow of short-circuited current through the device. The magnitude of this current value is more when compared with that of normal current magnitude levels. This causes the development of a high range of temperature in the fuse.

    So, the device starts to melts and breaks down.


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