Category Archives: Electrical

Will Solar Rooftop be disruptive for Power Distribution Utilities in India !

Greenhouse gasses (GHGs) have suffocated the world since 1820, the beginning of the industrial revolution. This dying world of ours is home to more than 8.5 million species. Out of these 41,415 species are on IUCN Red List and 16,306 endangered due to the adverse climate conditions. Accord de Paris was the agreement within the […]

Protection Relay

What is Protection Relay? A relay is nothing but a sensor, which senses an abnormal condition of an electrical circuit and closes its contacts. These contacts in turns close and complete the circuit breaker trip coil circuit which trips the circuit breaker by isolating the faulty portion of the electrical system from the healthy portion. […]

“Loss of Excitation” Protection in Generator

Alternator,when connected to the grid, it is preferred to operate it in lagging Power Factor mode and in lagging power factor mode it delivers Reactive power and Active power to the grid and the rotor speed is same as that of grid frequency, which is 3000 RPM as per 50 Hz in India.Loss of excitation will […]

3-Phase Induction Motor Working

What is RMF? RMF stands for Rotating Magnetic Field and in case of a 3-Phase supply system whenever the 3-phase windings(R/Y/B) are physically displaced by 120 degrees along the periphery and are electrically being fed from a 3 –phase supply which are time-displaced by 120 degrees electrically. Then we have three mmf (Magneto Motive Force) […]

Transformer Working & Components

Any device that is capable of continuous electro-mechanical energy conversion is known as an Electrical Machine. Therefore, transformer is not an electrical machine. It is simply a Static Device which transmits power from one circuit to another at different voltage levels and same frequency. In case, the voltage level also remains the same, it is […]

Faults in Generator

Generators are the most expensive equipment in the whole plant and the generator faults are considered to be the serious since they may cause severe and costly damage to the insulation, windings and the core. They may cause severe mechanical damage to the shafts and couplings, thereby increasing the amount of fault damage. In the […]


Definition: The main function of switchyard is to transmit & distribute the power at incoming voltage from the generating station and provide facilities of switching by the help of switchgears. Earlier we have explained about the various types of switchgears in our previous article.Switchyard is the point in the power network where transmission lines and […]

Basics of Transformer

Transformer is an electrical device whose main purpose is to transfer power from one electrical circuit to another circuit, but apart from this transformer is also a constant frequency, constant power and constant flux device. Transformer works on the principle of Faradays Law of electromagnetic Induction and it say that whenever there is a relative […]


In case of power plants we generally use Synchronous generators, which are also known as Alternators, they are named as synchronous as they rotate at synchronous speed or we can say that they rotate in synchronisim with the stator field being magnetically locked. The reason we are using AC generators instead of DC generators is […]

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