Found 65 Articles for Transmission of Electric Power

Materials Used for Heating ElementAn electric heating element is a device which converts electrical energy input into heat energy output. No single element, metallic or non-metallic, is used for designing the heating elements. Different alloys have been tried to obtain different temperature. The various heating alloys are given as follows −The alloys commonly used for low and medium temperature services are −Alloy of Nickel and Chromium, where Ni = 80 % and Cr = 20%. The Ni-Cr alloy is suitable for temperature up to 1200 °C.Alloy of Nickel, Chromium and Iron, where Ni = 65%, Cr = 15% and Fe ... Read More

Induction Heating FurnaceAn electrical furnace in which the heat is produced by induction heating of metal, is called the induction heating furnace. The induction heating furnaces have the capacities range from less than 1 kg to 100 tons and are used to melt various metals like iron, copper, aluminium, etc.Indirect Core Type Induction FurnaceThe indirect core type induction furnace works on the principle of Faraday’s law of electromagnetic induction (mutual inductance). The schematic of an indirect core type induction furnace is shown in the figure below.In this type of induction furnace, a heating element is heated by induction, which transfers ... Read More

Indirect Arc FurnaceAn electric arc furnace in which the heat is produced by striking the arc between two electrodes and then transferred to the charge to be heated is called an indirect arc furnace.In an indirect electric arc furnace, the electric arc does not come in contact with the charge but heat is transferred through radiation from the electric arc to the top surface of the charge and through conduction from the top surface to the bottom layer in the charge.Construction and WorkingThe construction of the indirect arc furnace is shown in the figure. The figure shows a rocking arc ... Read More

Eddy Current HeatingWhen the heating of the charge is done by the induced eddy currents in charge, it is known as eddy current heating.To heat the charge by eddy current heating process, the charge is placed inside a current carrying coil. The current is the high frequency alternating current. For this reason, this method is also called the high frequency eddy current heating. The alternating magnetic field produced by the coil sets up eddy currents in the charge to be heated. Consequently, the charge gets heated-up. The coil used for creating the magnetic field is known as heater coil or ... Read More

Electric Resistance FurnaceThe resistance furnaces or ovens are the insulated closed chambers with a provision for ventilation. The resistance furnaces or ovens are used for heat treatment of metals, commercial or domestic heating, pottery work, etc.The different elements of the furnace can be energies from DC or AC supply of the rated voltage. The star-delta formation provides a wide variation of the temperature.In case of batch type resistance furnace, the charge is inserted in the furnace. The figure shows a typical batch type resistance furnace. Here, it is heated for a specific time at a specific temperature and then removed. ... Read More

Induction Heating FurnaceAn electrical furnace in which the heat is produced by induction heating of metal, is called the induction heating furnace. The induction heating furnaces have the capacities range from less than 1 kg to 100 tons and are used to melt various metals like iron, copper, aluminium, etc.Direct Core Type Induction FurnaceThe schematic diagram of a direct horizontal core type induction heating furnace is shown in the figure below.It works on the transformer action in which the charge to be heated forms a single-turn short-circuited secondary winding and it is magnetically coupled to the primary winding through iron ... Read More

An electric furnace is the furnace that heats materials by means of an electric arc is called the electric arc furnace (EAF).Direct Arc FurnaceThe direct arc furnace is the one in which the electric arc is struck between the electrode and the charge, to be heated, so that the arc current flows through the charge and there is a direct contact between the arc and the charge.In case of direct electric arc furnace, the heating process is faster and the heating efficiency is also high. In addition to the arc heating, some additional heat is produced by the passes of ... Read More

Metal Inert Gas (MIG) WeldingThe metal inert gas (MIG) welding is an electric arc welding process in which a continuous solid wire electrode is heated and fed into the weld pool from a welding gun. In case of MIG welding process, inert gas such as argon, helium, etc. is used as shielding gas to protect the weld pool from the atmospheric contamination.Tungsten Inert Gas (TIG) WeldingThe tungsten inert gas (TIG) welding is also an arc welding process in which the electric arc is struck between a non-consumable tungsten electrode and the workpiece. TIG welding is also known as Gas Tungsten ... Read More

Fusion WeldingThe welding process that uses heat to join (or fuse) two or more materials by heating them to their melting point is known as fusion welding. The fusion welding process may or may not require the use of filler material for welding. Examples of the fusion welding are arc welding, gas welding, resistance welding, etc.Solid State WeldingThe welding process in which two workpieces are joined under a pressure providing an intimate contact between them and at a temperature essentially below the melting point of the base materials is known as solid state welding. The materials being joined without the ... Read More

Welding is a process of melting and joining different types of materials together. There are several types of welding processes available that are used based on the types of materials being joined or melted. Two most extensively used types of welding are arc welding and gas welding. The fundamental difference between arc welding and gas welding is that arc welding uses electric current to produce heat for joining of metals, while the gas welding uses flammable gases to produce heat for welding process. Read this article to learn more about Arc Welding and Gas Welding and how they are different ... Read More