Tricky but Easy Electrical Engineering!
Crawling is a phenomenon in which Induction Motor operates at very low speed. Crawling is caused by the presence of space harmonics in the air gap flux. For understanding Crawling, there are some points which are very important to know. Those points are as follows: Speed of Rotating magnetic flux = 2f/P, where f is … Read more
As we know that Rotor Conductors of Squirrel Cage Induction Motor are skewed. It is not straight conductor as shown in figure below. Rotor conductors are skewed because of the following reasons: Primarily to prevent the Cogging Phenomenon. It is a phenomenon in which, if the rotor conductors are straight, there are chances of magnetic … Read more
This seems amazing that Consumers are getting paid for consuming electric Power by electric Utilities. But it happens. In this post I will discuss how and when this situation occurs where consumers get paid for consuming electric power. The first thing to know about electricity is that it has to go somewhere. If it’s in … Read more
The main difference between the Smart Grid and Conventional Power Grid on the basis of the design idea is that Smart Grid is based on Demand Follows Supply while conventional grid on Supply Follows Demand. That means, the amount of coal dumped into a thermal power plant in some way depends on the estimated electricity demand … Read more
What is Smart Grid? A Smart Grid is an evolved Grid system that manages electricity demand in a sustainable, reliable and economic manner, built on advanced infrastructure and tuned to facilitate the integration of all involved. So tough definition? Let’s make it simple. Smart Grid is a Power Grid monitored and controlled electronically to maximize efficiency … Read more
SFRA stands for Sweep Frequency Response Analysis. This test is very reliable for condition monitoring of physical condition of transformer winding, core and above all core & winding integrity. Why to conduct SFRA test? The winding of Transformer may be subjected to mechanical stresses during transportation, heavy short circuit faults, transient switching impulses & lightening impulses etc. … Read more
A scheme diagram of HVDC Transmission is shown below for ease in understanding the advantages and disadvantages. Advantages of HVDC: There is a list of advantages of High Voltage DC Power Transmission, HVDC when compared with High Voltage AC Power Transmission, HVAC. They are listed below with detail while comparing with HVAC. Line … Read more
Relays are electro-mechanical switches that have coil and two types of contacts that is NO & NC. But a Programmable Logic Controller, PLC is a mini computer which can take decision based on the programme and its input & output. Thus a PLC can perform many functions with the same hard wiring. A simple architecture … Read more
The area of the window and cross-sectional area of the limb are the main dimensions of a transformer; the product of which is directly proportional to the size and weight of the Transformer. Larger this product, bigger and heavier is the Transformer. While designing a Transformer, the designer starts with an equation called the Output Equation of … Read more
An Antifuse is an electrical device that performs the opposite function to a fuse. Whereas a fuse starts with a low resistance and is designed to permanently break an electrically conductive path when the current through the circuit exceeds a specified value while an Antifuse starts with a high resistance and is designed to permanently … Read more