The element of the transmission line by which the line conductors are insulated from supports is known as line insulator. The insulators used in the transmission lines are of various types. Some of the important types of insulators are given as follows −Pin Type InsulatorSuspension Type InsulatorStain InsulatorShackle InsulatorPin Type ... Read More

Corona Effect in Overhead Transmission LineThe phenomenon of violet glow, hissing sound and production of ozone gas in an overhead transmission line is known as corona.When a very high voltage is applied across two conductors of the overhead transmission line whose spacing is large as compared to their diameters. When ... Read More

What are Insulators?Insulators are the elements of transmission system which provide necessary insulation between line conductors and supports and hence, prevent any leakage current from the conductors to the earth.The line conductors in the overhead transmission lines should be supported on the poles or towers in such a way that ... Read More

The transmission voltage for which the cost of conductors, transformers, insulators, switchgears and other terminal apparatus is minimum is called the economical transmission voltage.As we know, if the transmission voltage is increased, the volume of conductor material required for the transmission lines is reduced. Hence, this decreases the expenditure on ... Read More

Underground Electric Transmission SystemThe system of electric power transmission uses underground cables for transmitting the electric power from the generating station to the consumers is known as underground electric transmission system.Underground cables have low visibility and are not affected by bad weather. However, the cost of these cables is comparatively ... Read More

AC (Alternating Current) and DC (Direct Current) are the two different types of electric current that are used in the welding process. AC arc welding is commonly used for down-hand heavy plate welds, fast fills and with aluminium TIG welding with high frequency, while DC welding is better for welding ... Read More

Resistance WeldingResistance welding is the process of joining of metals by applying mechanical pressure and by passing high electric current for a length of time through the metal area which is to be joined.The process of resistance welding was discovered by Professor Elihu Thompson in 1885 in Philadelphia. It was ... Read More

In the infrared or radiant heating, the heating elements are of tungsten filament lamps operating at about 2400 °C. As at this high temperature a greater portion of infrared radiation is given to the object for heating. In this method of heating, the heating effect on the object is greater ... Read More

What is Electric Heating?The process in which electrical energy is converted into heat by resisting the free flow of electric current is known as electric heating.Whenever an electric current is made to pass through any circuit having a resistance of R ohms, then power dissipated in the circuit is equal ... Read More

Electric ArcAn electric arc is an electric discharge of gases which is produced by passing an electric current between two points called electrodes. The electric arc was first detected by British chemist Humphry Davy in 1808. The electric arc is the visible plasma between two electrodes due to the ionization ... Read More