Electric Current Definition In metals, there are a large number of free electrons which moves randomly from atom to atom. When the electric potential difference is applied across a wire of metal, free electrons which are negatively charged, attracted by positive terminal of the cell. Due to this force of attraction, free electrons …
Dielectric heating is also known as radio frequency heating or electronic heating. When a non-metallic material such as wood, plastic, bone or ceramic is subjected to an alternating electrostatic field, the dielectric loss occurs in it. This loss appears in the form of heat in dielectric heating. It is the basic dielectric heating principle. …
The electric arc furnace working principleis based on the heat generated by an electric arc. The electric arc heating may be used in the following different ways. By striking the arc between the charge and electrode: In this method, the heat is directly conducted and taken by the charge. The furnaces operating on this principle …
No core is provided in the coreless induction furnace. A crucible of more convenient shape can be employed. Coreless Induction Furnace Principle In this case, also the charge to be melted is made the secondary of the transformer. The primary is wound over the crucible itself. The eddy currents produced in the charge …
Hi friends, in this article, I am discussing ajax wyatt furnace working and core type induction furnace. These are basically induction heating machines. The induction heating works on the transformer principle. It is also known as eddy current heating. The currents are induced by the principle of electromagnetic induction. The induction heating may be …
The basic principle of resistance heating is that, when current passes through some resistance, power loss takes place which appears in the form of heat. There are two types of resistance heating namely, direct resistance heating and indirect resistance heating. Direct Resistance Heating In the direct resistance heating, electric current passes through the charge …
The supporting structure for overhead lines is required to keep the bare conductors at a suitable level above the ground. These may be various types of poles or towers. Properties of Poles and Towers Used in Transmission Line High mechanical strength in order to withstand the weight of conductors and wind loads etc. Light …
The overhead line conductors are supported on the poles or towers. In order to prevent the flow of current to earth through supports, the line conductors must be properly insulated from supports. This is achieved by securing line conductors to supports with the help of overhead line insulators. These insulators provide necessary insulation between …
The cost of conductor material is a vital part of the total cost of a transmission line. Therefore, calculation of conductor size of a transmission line is very important. Kelvin’s law in power system is used to find out the most economical area of x-section of a conductor for which the total annual cost …
The transmission of electric power over long distances was developed at the beginning of the twentieth century, since then it has made a rapid progress in its design and methods of operation which has resulted into a greater reliability and continuity. The electric power can be transmitted either by means of AC or DC …