Description and Use of Transformers

A transformer is a static device and it is commonly used all over the world for transforming electric energy from one circuit to another magnetically (that is, by induction rather than by way of conduction). usually, this transformation is accomplished b/w circuits of different voltages but having same frequency

. A power transformer will have a magnetic core surrounded by two or more windings. These windings carefully insulated from each other & from the ground. The windings are linked together in a manner to achieve the requires voltage transformation ratio. The overall assembly of core and coils is generally insulated and it is cooled by immersion in mineral oil or other suitable liquid that is stored in an enclosing tank. Connection to the windings is done usually by using the insulated bushings.

In a todays utility, electrical energy may subject to 4or 5 voltage transformations b/w the generation site and to the point where utilization takes place. As such, a given system possesses approximately 5times the kilovoltamperes [kVA] of transformers in comparison to that of generators.