Normally, no current flows through insulators or dielectric materials. However, when the voltage applied to such materials exceeds a certain value, then it breaks down and a heavy electric current (much larger than the usual leakage current) flows through it. If the insulator is a solid medium, it gets punctured or destroyed. Dielectric Strength Definition […]
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Construction, Classification & Advantages of Cables The transmission and distribution of electrical power can be done with the help of overhead transmission lines or by underground cables. It has been mentioned that in thickly populated areas like towns and cities, the use of overhead lines is not practicable. In such cases, electrical energy is transmitted
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Construction of 3 core underground cable is shown in Figure. The different parts of it are as under: Core or Conductors: A three core cable has three conductors as shown in Figure. These conductors are made of copper or aluminum and usually stranded to make the cable flexible. Insulation: Each core or conductor is covered by a
Hi friends, in this article, I am discussing the nuclear power plant working principle and hope you will find it informative. The breaking up of nuclei of heavy atoms (U235 or Th232) into two nearly equal parts with the release of a huge amount of energy is known as nuclear fission. The release of a
Working Principle of Hydroelectric Power Plant A power plant that utilizes the potential energy of water for the generation of electrical energy is known as a hydroelectric power plant. Hydroelectric power plants are generally located in hilly areas where dams can be built easily, and large water reservoirs can be made. In a hydropower plant,
Hi friends, In this article I am discussing the tidal power plant working, types, advantages and disadvantages. You will find it informative and exciting. The gravitational attraction of the moon and the sun upon the rotating earth produces tides in the sea. Rise and fall of tides occur twice a day. The highest level of
Open Cycle MHD System The block diagram of an open cycle MHD system in conjunction with a conventional power plant is shown in Figure. The step by step working of an open cycle MHD generator is as under: The atmospheric air is compressed to a high pressure in an air compressor. Thereafter, compressed air is
All electrical appliances and industrial equipment consume power at a lagging power factor. The power factor of industrial and commercial installations tends to be low, usually ranging between 0.60 – 0.75 only. The overall power factor of any installation is likely to be below 0.7 unless corrective measures are adopted to improve it. Due to
Hi friends, in this article, I am going to discuss the lightning arrester types and lightning arrester working principle. You will find this article very interesting and informative, I hope so. The lightning arresters are used to protect the power system from high voltage surges. An arrester does not absorb lightning or stop lightning. It
The induction motor is equivalent to a rotating transformer. Hence, we can draw the induction motor equivalent circuit with the help of equivalent circuit of the transformer. The basic equivalent circuit of induction motor is shown in Fig. which is very similar to that of a transformer. Here R1 and X1 are the per phase