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
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
Voltage regulation of transformers can be a little tricky to understand. Every piece of equipment is designed to operate at a particular voltage or voltage range. Therefore, it is a basic requirement of the power system to maintain the system at a certain level. What is voltage regulation in transformer? Any transformer must be capable … Read more
An electric transformer is a device used to step up and step down ac voltages. This article will help you understand their basic concepts, construction, the principle of operation, tests conducted on them, and their classification. During earlier days, DC power was generated close to load stations and distributed. The invention of the transformer resulted … Read more
What is the purpose of transformer oil? Transformer oil functions as a coolant as well as insulating material. It also enables transformer protection during internal faults. It is chemically stable and has high thermal conductivity and dielectric strength. On the event of faults it decays rapidly and forms gases which operate Buchholz relay. What are … Read more
How does a transformer work? A transformer is an electric machine that converts AC voltage from one level to another level with minimum power loss. It is based on the principle of electromagnetic induction. A typical power transformer consists of two sets of coils – Primary coil and secondary coil. The rate of voltage transformation … Read more
