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## What is mean by K in transformer?

K factor is defined as **a ratio between the additional losses due to harmonics and the eddy current losses at 60Hz**. It is used to specify transformers for non-linear loads. Transformers with a rated K factor of 4, 9, 13, 20 are available. … That is the trade-off to be able to handle higher harmonic factors.

## What is K Factor rated transformer?

K Factor Rated Transformers include several **major design improvements** that address the problems caused by non-linear loads and harmonics. They are designed to withstand the effects of harmonic currents without exceeding the temperature rating of the insulation system.

## How do you calculate the K factor of a transformer?

NON-LINEAR TRANSFORMERS WHAT IS K FACTOR? **Ih = Percent Current at Harmonic h h = Harmonic Order**, i.e. 3rd, 5th, 7th, etc. A common industry term for the amount of harmonics produced by a given load is the K Factor. The larger the K Factor, the more harmonics are present.

## What is the formula for determining the transformer harmonic derating factor?

Because instantaneous peak value of current is equal to the RMS value x 1.414, if the current waveforms are sinusoidal (no harmonic distortion), the formula produces a derating factor of 1.0. Once the derating factor is determined, **multiply the derating factor by the kilovolt-ampere capacity of the transformer**.

## What is the disadvantage of auto transformer?

The main disadvantage of an autotransformer is that **it does not have the primary to secondary winding isolation of a conventional double wound transformer**. Then an autotransformer can not safely be used for stepping down higher voltages to much lower voltages suitable for smaller loads.

## What is a transformer ratio?

The transformer turns ratio is **the number of turns of the primary winding divided by the number of turns of the secondary coil**. The transformer turns ratio provides the expected operation of the transformer and the corresponding voltage required on the secondary winding.

## Which type of transformer is used for distribution purpose?

Definition: A distribution transformer is also known as a typical **kind of isolation transformer**. The main function of this transformer is to alter the high voltage to the normal voltage like 240/120 V to use in electric power distribution.