Recently added

When to use I²R, V²/R or VI while calculating Electric Power?

-
Image
I came across a question that was asked to me quite a couple of time: When to use I²R, V²/R or VI while calculating power? At first, the question looks simple and as if it needs no formal explanation but that's not the case. Use of any of them will give the correct result provided that you apply it correctly. Correct application is possible only when you understand the type of circuit you are dealing with. Another important point is to use the one which is going to take less time and help you calculate easily. All of the three equations tell the same thing but their usage is subject to the type of problem you're trying to solve. Let us understand when, how an what to use while calculating power in an electrical circuit.
Post a Comment

Corona Discharge & Corona losses in a Transmission Line.

-
 *Note: Not to be confused with Coronavirus or CoVID-19...

Corona Discharge is a phenomenon that happens around a High Voltage Transmission Line in which the air surrounding the surface of the conductor glows bluish or greenish and a hissing sound is produced. Mathematically speaking, when the maximum Electric Field Intensity equals the dielectric strength of the medium around the transmission line, the voltage of the transmission line at this point is known as the Critical Disruptive Voltage. Beyond this voltage, the Corona phenomenon is seen on the line. Let's understand each of these things and what exactly is corona discharge, corona power loss and how to control it...



Comments

Post a Comment

Popular posts from this blog

Why earth pin in a 3 pin plug made thicker and longer than other 2?

-
Image
We have been using various electrical appliances in our household having such socket plugs as shown above. The upper pin is called an earth pin while the lower two are live and Neutral. But have you ever wondered why the earth pin looks so different than the other two pins? If you had, here's the answer. An earth pin is used to discharge any electric current flowing through the metallic enclosure of an electric appliance due to some internal fault or loose connection to the earth. The current flowing through the metallic enclosure is taken up by an earth wire in the appliance and is sent to earth through the earth pin in the socket.  Now in no way, the earth pin should be inserted in live or neutral hole on the socket because in that case, current would flow through the earth pin to the appliance and also will result in burn-out as well as insulation breakdown. That's why, the earth pin is made thick or different in dimension than the other two pins so that
Read more

CONVERT AC TO DC using transistors cheaply and Easily | RECTIFIER

-
Image
 Happy New Year everybody out there and sorry for the late update. So, This video describes how to make a full bridge rectifier SIMPLY and CHEAPLY at home using basic transistors. Must watch. I hope you will like this video. Please share this video if you have liked and do subscribe to my channel. This encourages me to bring more such informative videos on Electrical Engineering in future for you. Thanks.
Read more

Working & Application of a Variable Voltage Variable Frequency Drive (VVVfD)

-
Image
Variable Voltage Variable Frequency Drive (VVVfD) is one of the best and efficient methods of starting an Induction Motor Drive as well as it provides a smooth and wide range of Torque-Speed control. It saves electrical power and provides good motor starting and running characterstics. VVVfD controls the V/f (Volt/Hz) fraction to let the motor drive achieve good Torque-Speed characterstics as required. Hence it is also called, VSD - Variable Speed Drive or AFD - Adjustable Frequency Drive or Inverter based Drive as it uses Inverter to achieve the set points.  But how VVVfD works and why it is better than various other methods of Starting and Speed Control of Induction Motor based applications. Let's discuss the Theory, Working, Advantages and Applications of a VVVfD in detail.          
Read more