What is the Allowable Harmonics In the Philippines?
I have written several articles about the effects of harmonics and its mitigation. Another question that may pop up is, what is the allowable harmonic content at the point of …
Transformer K-factor Rating and Variable Speed Drives
In this article, I have discussed the difference between a conventional transformer and a K-factor rated transformer. In modern-day plants, Variable Speed Drives (VSD) are widely used. The project I …
Transformer K-Factor Rating and Harmonics
What is Transformer K-Factor Rating A conventional transformer has restricted use in an environment where non-linear loads are utilized, unbalanced input voltage or load current exceeds 5% total harmonic distortion. …
Effects of Harmonics on Resistive Loads
As a continuation of my article on effects of harmonics on electrical equipment, let us provide an example of the effects of harmonic currents on 1-ohm resistive load drawing 1 …
Phase Shifting Transformers to Cancel Harmonics
When there are several non-linear loads of equal ratings in a power systems, the use of phase shifting transformers could help cancel harmonics. After harmonic filters, phase shifting transformers are …
Phase Sequence of Harmonics
In the article Effects of harmonics on Electrical Equipment, harmonics distort the fundamental frequency of the mains voltage waveform which affects the performance of other electrical equipment and creates additional …