Technical articles on Electronics and Electrical Engineering topics focused on Basics of EE, Electronic components, power systems and equipment used for generation, transmission, operation, and controls of electricity.
Of all methods used for laying underground cables the direct laying of underground cables is simple and cheapest method and due to its simplicity, it is much favored in modern practice. The direct laying of underground cables involves digging of a trench that is about 1·5 meters deep and 45 cm wide. A layer of … Read more
The magnetic field is the fundamental mechanism by the virtue of which energy is transferred and converted from one form to another. The working principle of motors, generators and transformers is based on magnetic fields. Given below is an overview of magnetic field in this regard.
Digital integrated circuits are categorized based on the complexity of their circuits. The categorization is based on a number of logic gates that are contained inside a single package. Integrated circuits are categorized as small-scale, medium-scale, large-scale, very large scale, ultra-large, Wafer-scale, SoC and 3D-IC levels. Small‐scale integration (SSI) Such devices comprise numerous independent gates … Read more
An ideal op amp has infinite voltage gain and bandwidth. A practical op-amp falls short of these ideal standards. Given below are the characteristic features of the ideal op-amp. The figure below shown as an ideal operational amplifier. The input voltage Vin appears between the two input terminals while the output voltage is AvVin.
Steam turbines are generally classified on the basis of action of steam on moving blades. On the basis of this, steam turbines are divided into two categories. These are: Key Differences between Impulse and Reaction Turbines Impulse turbines Reaction turbines Steam is completely expanded in the stationary nozzles Steam is partially expanded in the stationary … Read more
The power supplied by utility company should be satisfactory. The polyphase voltage supplied at consumer terminals should be balanced. If that is not the case and some unbalanced polyphase voltage is supplied to a consumer operating synchronous or induction motors, the result will be a decreased efficiency of power machinery and it will also have … Read more
Economic Power Transmission Voltage Formula Where V = Line voltage in kilovolts (kV) P = Maximum kW per phase that is to be delivered to single circuit l = Distance of transmission line in km Also see below: Different types of Insulators used in Power Transmission lines:
Undergrounds Cables are generally laid directly in the ground and compared to power transmission and distribution lines the chance of occurrence of fault on underground cables is less. However, once a fault occurs on underground cables, it is difficult to locate and repair the fault because cables are not visible. Given below are 3 Types … Read more
An underground cable comprises of one or more conductors that are covered using suitable insulation and is surrounded by a protecting cover. The underground cables should have following five features:
The rating factor is one of the most important factors when it comes to CTs. The rating factor (RF) of CTs implies the maximum continuous current that can flow through the CT primary without exceeding the thermal capability of its windings. The typical values of rating factors for CT range from 1.0 to 4.0. A … Read more