step up transformer

“TRANSFORMER”- one of oldest innovations in Electrical Engineering. A Transformer is an electrical device that can be used to transfer the power from one circuit and another circuit without physical contact and without changing its characteristics like frequency, phase. It is an essential device in every electrical network circuitry. It consists majorly two circuits, namely primary circuit and one or more secondary circuit. Please refer the link Everything You Need to Know About Transformers & Working of Transformer. In this discussion, we deal with different types of transformers.

Working Principle of Transformer

The transformer working depends upon Faraday’s electromagnetic induction law. The mutual induction phenomenon between two or more winding is responsible for power transformation.

According to Faraday’s laws, “The Rate of change of flux linkage with respect to time is directly proportional to the EMF induced in a conductor or coil”.

E= N dϕ /dt

Where,

E = Induced EMF

N = the number of turns

dϕ = Change in flux

dt = Change in time

Types of Transformers

There are several transformer types used in the electrical power system for different purposes, like in power generation, distribution and transmission and utilization of electrical power. The transformers are classified based on voltage levels, Core medium used, winding arrangements, use and installation place, etc. Here we discuss different types of transformers are the step up and step down Transformer, Distribution Transformer, Potential Transformer, Power Transformer, 1-ϕ and 3-ϕ transformer, Auto transformer, etc.

Transformers Based on Voltage Levels

These are the most commonly used transformer types for all the applications. Depends upon the voltage ratios from primary to secondary windings, the transformers are classified as step-up and step-down transformers.

Step-Up Transformer

As the name states that, the secondary voltage is stepped up with a ratio compared to primary voltage. This can be achieved by increasing the number of windings in the secondary than the primary windings as shown in the figure. In power plant, this transformer is used as connecting transformer of the generator to the grid.

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