Tricky but Easy Electrical Engineering!
In Transmission Line, two types of capacitance exists: First one is capacitance between the phase conductors and the second one is shunt capacitance between the conductor and the earth. Capacitance between the phase conductors is not only dependent of conductor spacing, radius of conductor and height of conductor from the ground rather it is also … Read more
Maxwell Bridge is used for the measurement of Self-Inductance. Like other bridge, this method also works on balancing of bridge. Balancing of bridge is achieved when there is no current through the detector. Don’t worry we will be discussing everything in detail in this post. Maxwell’s Bridge employs the comparison of test specimen variable standard … Read more
Travelling wave on transmission line is the voltage / current waves which propagate from the source end to the load end during the transient condition. These waves travel along the line with the velocity equal to velocity of light if line losses are neglected. But practically there always exists some line loss and hence these … Read more
What is Swing Equation? The Swing Equation of generator describes the relative motion between the rotor axis and the synchronously rotating stator filed axis with respect to time. This equation is very helpful in analyzing the stability of connected machines (machine here means generator). Derivation of Swing Equation: As we know that in a synchronous … Read more
We know that the very basic purpose of Transformer is to transmit power at two different voltage levels. For example, if a generating station is generating electrical power at 21 kV and evacuates it power at 400 kV then a three phase transformer of voltage rating 21 kV / 400 kV is used. But the … Read more
Cable bonding is basically the method of making electrical connection between the sheaths of two cables. Such electrical connection of sheaths may either be done at one end or at both the ends of the cable depending upon the application. In this post we will discuss the importance of bonding of cable. As we know … Read more
When single core cable is used for AC power transmission, the current flowing through the core of cable set up pulsating magnetic field in its surrounding. This magnetic field links with the cable sheath and hence as per the Faraday’s Law an induced voltage is developed in the sheath. This induced voltage in certain conditions … Read more
Power System is nothing but the interconnection of various bus. Each of these buses are associated with four electrical parameters namely voltage with magnitude and phase angle, active power and reactive power. These fours parameters are not completely know but in practical situation only two are known and the remaining two parameters are calculated using … Read more
Restriking voltage is the transient voltage appearing across the breaker contacts immediately after the opening of breaker contacts. It is also called Transient Recovery Voltage (TRV). Restriking voltage is associated with high frequency which die out quickly. Even though restriking voltage is lasts for very short duration, its importance for breaker fault clearing cannot be … Read more
First Pole to Clear Factor of a Circuit Breaker is the ratio of power frequency recovery voltage across the first pole to clear the arc to the normal phase to ground voltage when all the three poles of breaker are open. It is denoted as kpp. If Vcb be the recovery voltage across the first … Read more