Tricky but Easy Electrical Engineering!
Impedance is the resistive parameter offered to the flow of current in a circuit. Whenever current flows or electrons move through a closed circuit, due to collisions of electrons, resistance is offered to the flow of current. In a DC circuit, impedance is nothing but resistance. But in an AC circuit, along with resistance, inductance … Read more
A Transmission Line classification based on its length are Short, Medium and Long lines. The length of line is calculated between the two substations of concern. If the length of line is less than 80 km then it is said to be Short Transmission Line. The length of Medium Transmission Line varies from 80 to 160 km. … Read more
DC – DC Booster: Booster converter is a combination of Transistors, diodes, and/or inductor or capacitor. The combination of active electronic elements (diodes and transistors) provides a DC voltage step up (say 1.5 to 9 v) while the combination of passive elements acts as a filter to reduce ripples. Its basic function is to step … Read more
We have already discussed about losses in electrical machine in “Losses in Electrical Machine – Core Loss”. Under normal operating condition, the core loss in the Rotor of an Induction Motor is negligible. In this post we will discuss about this. Core loss consists of Hysteresis Loss and Eddy Current Loss. Hysteresis Loss … Read more
In this post, I am going to describe some but important points which one should take care while he/she is in final year of B.Tech. If your destiny is Core Electrical then this post will help you. Be clear with your concepts: We usually think that whatever we have learnt during previous semesters is utter … Read more
A Squirrel Cage Induction Motor (SCIM) only has a cage rotor winding, whereas a synchronous machine has both a cage (damper) and a wound DC field winding as shown in figure below. Synchronous Motor with Damper Winding: Squirrel Cage Induction Motor: In both cases, and when using only the … Read more
SF6 gas is used in High Voltage and Extra High Voltage Circuit Breaker. For better understanding of why SF6 is chosen, we will go through the chemical and dielectric properties of SF6. Chemical Properties of SF6: 1) SF6gas is very stable gas and remains stable up to 500 °C. 2) SF6gas is inert. The … Read more
Ideally the resistance of a Voltmeter is infinite so that so that voltmeter does not alter circuit current. A low resistance voltmeter may give correct reading when measuring voltage in low resistance circuit but the Voltmeter produces unreliable and erroneous reading when connected in high resistance circuit. This is because, as the resistance of voltmeter … Read more
There are ample of opportunities for a fresh Electrical Engineering Graduate to get a Core Job. The only thing which one should know that “In which direction and how one should proceed”. Many Graduates think that their CGPA / DGPA is not good enough and get disappointed. I personally want to say them, if you … Read more
Lightning is an electric discharge in the form of a spark or flash originating in a charged cloud. Lightning is a very long electrical spark, ‘very long meaning greater than about 1 kilometer. Most lightning is generated in thunderstorms and is characterized by a length of 5 to 10 km, at the extreme about 100 … Read more