Electrical4U 
What is Medium Transmission Line? A medium transmission line is defined as a transmission line with an effective length more than 80 km (50 miles) but less than 250 km (150 miles). Unlike a short transmission line, the line charging current of a medium transmission line is appreciable and hence the shunt capacitance must be … Read more
A Junction Field Effect Transistor (JFET) is a semiconductor device within the field effect transistor family. It operates via an electric field across its junction. This article focuses on the JFET, one of the two main types of field effect transistors, the other being the Metal Oxide Semiconductor Field Effect Transistor (MOSFET).JFET is a voltage … Read more
What is a Synchronous Motor? A synchronous motor, or synchronous electric motor, is an AC motor in which the rotor’s rotation period matches the frequency of the supply current, perfectly aligning with the machine’s rotating field. Let’s take a step back for a moment and define what an electrical motor is. Electrical motors are an … Read more
Electric flux is defined as the total number of electric lines of force emanating from a charged body. An electric field is represented by electric flux. Like magnetic flux, electric flux lines are not always closed loop. This is because, an isolated magnetic north pole or an isolated magnetic south pole do not exist practically, … Read more
What is Long Transmission Line? A long transmission line is defined as a transmission line with a length greater than 250 km (150 miles). Unlike short transmission lines and medium transmission lines, long transmission lines need detailed modeling of their distributed parameters along the entire length. This makes calculating the ABCD parameters of transmission line … Read more
What is Power Factor? In electrical engineering, the power factor (PF) of an AC electrical power system is defined as the ratio of working power (measured in kilowatts, kW) absorbed by the load to the apparent power (measured in kilovolt amperes, kVA) flowing through the circuit. Power factor is a dimensionless number in the closed … Read more
For confirming the specifications and performances of an electrical power transformer it has to go through a number of testing procedures. Some tests are done at a transformer manufacturer premises before delivering the transformer. Transformer manufacturers conduct two primary types of tests: type tests and routine tests, to ensure each transformer meets quality and performance … Read more
What is Short Transmission Line? A short transmission line is defined as a transmission line with an effective length less than 80 km (50 miles), or with a voltage less than 69 kV. Unlike medium transmission lines and long transmission lines, the line charging current is negligible, and hence the shunt capacitance can be ignored. … Read more
What is Ferranti Effect? The Ferranti effect is defined as the increase in voltage at the receiving end of a long transmission line compared to the sending end. This effect is more noticeable when the load is very small or there is no load (open circuit). It can be described as a factor or a … Read more
Transient stability in a power system is the ability to maintain synchronization and recover stability after significant disturbances, such as switching circuit elements on and off or clearing faults. More often than not, the power generation systems are subjected to faults of this kind, and hence its extremely important for power engineers to be well-versed … Read more