A complete Electrical Engineering portal
Noise is an unpleasant, unwanted and annoying sound. Transformer noise, quite commonly known as the ‘humming sound or buzzing sound’ of transformer, is one of the major problems with large transformers. The noise from the transformers installed close to a residential area or an office could annoy the tenants. Why do transformers make noise? Even … Read more
Open circuit test and short circuit test are conducted to determine the core loss, copper loss, and equivalent circuit parameters of a transformer. In this article, in addition to the tests mentioned in the title, we will also discuss the polarity test and Sumpner’s test. Normally transformers are tested at no-load. Transformers can be tested … Read more
In order to understand the equivalent circuit of a transformer, we suggest you read Ideal transformer first and then come back and continue from this point. What is an equivalent circuit of a transformer? Equivalent circuit of a transformer is a schematic representation of a practical transformer that shows all electrical parameters such as winding … Read more
A transformer is an AC device used to step down or step up voltages. To visualize the current flow and other circuit properties of a transformer, certain assumptions are made, and a conceptual circuit is made, which we can call an ideal transformer. In fact, no transformer is ideal. What is an Ideal transformer? A … Read more
Electricity does not exist naturally in any useful form. It has to be generated from any other sources of energy such as solar, wind, hydro, thermal, atom, etc. Photovoltaic cells help us trap energy from the sunlight and generators are used to convert mechanical power available in other forms to electricity. The mechanical power can … Read more
Ceiling fans are used to circulate air inside a closed space. Even though they do not cool down the air, the continuous circulation of air helps us feel better. The power consumption of ceiling fans is fractional when compared to that of air conditioners. The energy usage of ceiling fans, electricity bill and the daily, … Read more
Induction motors are one of the major power-consuming loads on the planet today and are widely used for all industrial and domestic applications. Plugging is one of the braking techniques performed in induction motors. Dynamic braking and regenerative braking are the other two braking methods. What is meant by plugging an induction motor? Plugging is … Read more
“Can we generate electricity from electricity?” This is a quite common question that many people ask. The answer for this question is amazingly simple but tricky. We need to understand the principle of energy transformation to be able to digest the answer. According to the law of conservation of energy, “Energy can neither be created … Read more
You might have come across various types of transformers in your daily life either knowingly or unknowingly. This article illustrates various transformer types. Before getting into classification, here is a brief introduction to the basic principle of the operation of transformers. Transformers are devices used to transfer power between two AC circuits. It works on … Read more
Short circuits and overloads are abnormal conditions that cause heavy current flow in a circuit. Heavy currents are capable of damaging a device or a circuit and may end up with electrical hazards. Fuses and circuit breakers are protection devices that ensure the safety of the equipment or circuit in which they are used. This … Read more
