Suppression of Harmonics in Transformer

In this post we will focus on various methods adopted to suppress harmonics in a Transformer. Harmonics in a Transformer can be suppressed by flowing methods: Lower Flux Density: Harmonics in Transformer can be suppressed by having lower flux density in core but it has one disadvantage that, this method of reducing flux density in … Read more

Voltage Regulation of a Transformer

Voltage Regulation of Transformer is defined as change in magnitude of Secondary Terminal Voltage per unit Rated Secondary Terminal Voltage when load at a given Power Factor is reduced to zero while maintain the Primary Voltage constant. Lets us assume that,   V2 = Secondary Terminal Voltage at any Load   E2 = Secondary Terminal … Read more

Advantage & Disadvantage of Auto Transformer over Two Winding Transformer

Advantage of Auto Transformer: The weight of conductor for any winding depends upon two parameters: Current carried by the winding Number of turns required in the winding Thus we can say that weight of conductor in a winding is directly proportional to its Ampere Turns i.e. MMF. Now, we will focus our attention on the … Read more

Basic Principle of Auto Transformer

A Transformer, in which a part of the winding is common to both the Primary and Secondary circuit is called an Auto Transformer. It shall be noted that in Two Winding Transformer, Primary and Secondary windings are electrically isolated but in Auto Transformer, the two windings are not electrically isolated.A simplified diagram of a Step-down Auto Transformer is … Read more

Purpose of Radiator in Transformer?

Because of flow of electric current through the winding of Transformer and due to core losses, heat is produced in the windings and core. Because of this heat the temperature of Transformer oil increases. Thus cooling of Transformer Oil is must as we know that the rating of any electrical equipment depends upon its allowable … Read more

Purpose of Silica Gel Breather in Transformer

Breather, as the name suggest is just an arrangement though which a Transformer breath air. How does a Transformer Breath? As the load on a Transformer increases, the temperature of Transformer oil increases which cause expansion in oil volume and thus the expanding oil volume pushes the air outside from the Conservator of Transformer. On … Read more

Transformer Off-Load Tap Changer

Taps are connections to the, usually high-voltage winding of a transformer which enables changes to the turns ratio to be made in order to make changes to the secondary voltage to compensate, where necessary, to a fall in terminal voltage below the regulatory allowance. There are two types of tap-changing mechanism, ‘Off-Load Tap Changer’ and … Read more

Concept of Tap-Changers in Transformer

The modern loads are designed to operate at satisfactorily at one voltage level. It is therefore of great importance to keep the consumers terminal voltage within a prescribed limits. The Transformers output voltage and hence the terminal voltage of the consumer can be controlled by using tap either on primary or secondary side of Transformer. … Read more