K Factor Transformer Calculator

The K-Factor is a number calculated from the harmonic spectrum of the current in a load waveform such that regardless of the actual spectrum loads that require the same K Factor have the same heating effect on the transformer. The strategy is to calculate the K-factor for your load and then specify a transformer with a K-factor of an equal or higher value.

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Single Phase Transformer Full-Load Current Amps kVA 1000 V Three Phase Transformer Full.

K factor transformer calculator. From the result the transformer should have a k-factor of 884 or above. Understanding Transformer K Factor Rating A K-Factor rating is an index of the transformers ability to supply harmonic content in its load current while operating within it temperature limits. In Fraction of total rms load current at.

The transformer calculator uses the following formulas. Between the K-Factor according to the UL standards and the transformer over rating factor the factor K. Applies to PM8xxx and PM55xx.

K factor is defined as a ratio between the additional losses due to harmonics and the eddy current losses at 60Hz. For balanced loading a transformer with a K factor of 4 should be specified when no more than 50 of the total load is non-linear. In this way any load can be specified by its K-Factor and transformer compensation for K-Factor becomes.

In addition to being familiar with K-factor calculations what can be even more helpful is to measure power distribution systems within existing buildings so that you can obtain an exact sampling of the harmonic content. K-Factor Calculator - D12 Transformers used to supply IT equipment and other non-linear loads need to be de-rated to between 60 and 80 of their nominal capacity. Transformers with a rated K factor of 4 9 13 20 are available.

K2 L2 L1Ls L1L2 L1Ls L1 1 Ls L1 or k 1 Ls L1 8 L1 is the inductance measured across L1 with winding 2 open and Ls is the same measurement with winding 2 shorted. K-Factor calculation depends upon the fundamental current and the harmonic current components and it is an indicative value of the harmonic contents in the power system. K-factor h2In IR2 nMax n1.

Options include aluminum or copper windings indoor or outdoor applications low temperature rise low sound and other custom options. K is determined by inserting these inductance values into equation 8. The results can be used to select transformers or to determine suitable de-rating factors for transformers.

X X 60 and 90 BatteryUPS sizing To determine amp-hour based on load and duration. The advantage of using a K-factor transformer is that it is usually more economical than using a derated oversized transformer. And it exceeds 05 when I use your K-Factor Calculator for 00751 thick material with an 11 inside bend radius.

Equivalence table between K-Factor UL 1562 and over rating factor Factor K HD 538 THD 0136 0194 0241 0281 0350 0413 0443 0472 0501 0529 0585 0641 0727. On this k-factor-calculator page it says the k-factor cannotshould not exceed 05 but in your Thickness K-Factor example chart it does exceed 05 it is 0615 for the 08 thickness. The Calculator indicates a k-factor of 08359.

For Dry Type Transformers a K-Factor calculation is made to determine the amount of the Harmonic Content present in a power system. K2 M2 L1L2 7 Substitute equation 6 into equation 7. For example a K-13 transformer can b e full y loaded wi th a n y harmonic load ha v ing a K-Factor up to K-13.

K-factor calculations can be extremely useful in determining the exact rating for transformer selection. The above equation is based on rated transformer current as per unit PU current. Eatons dry type ventilated K-factor 4 9 13 20 and 30 rated transformers designed to withstand harmful overheating effects caused by harmonics generated by non-linear loads.

For a new transformer with harmonic currents specified as per unit of the rated transformer secondary current the K-factor and harmonic loss factor have the same numerical values. This software calculates the K-Factor of a load from the harmonic content according to US and European practice. It is used to specify transformers for non-linear loads.

K-factor in 2 h nMax n1 1 Where. Set of harmonic load current measurements the calculation of the UL K-factor is dependent on the transformer rated secondary current. X X X 90 Constr Transformer K-factor To determine appropriate K-factor for transformers with non-linear loads X X X 90 Constr VFD reflective wave.

SIX Swiss Ex is a leading global technology company that energizes the transformation of society and industry to achieve a more productive sustainable future. K-factor relates the heating effect of a distorted current in a transformer to a sinusoidal current with the same RMS magnitude it describes a transformers ability to serve non-linear loads without exceeding rated temperature rise limits. In this way the transformer can be sized to the load without derating.

The K factor is found from the following equation. Harmonic Current Flow Thru Transformer While most harmonic currents travel through transformers from the harmonic currentcreating loads to the electrical power supply some are captured within the transformer. The calculation of K-factor for a given load is outlined in IEEE C57110 but the table below provides a basic summary of the types of loads each K-factor is suitable for.

Power factor correction To size capacitors for single motor or systems. I f the lo a d h a s a K - F actor greater than 13 then th e tran s former cannot b e safel y operated at full load and would require d e rating. The K-rating number of the transformer 1 4 9 13 20 is in indication of the amount of harmonic current the transformer is capable of handling.

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