Misfits of Design
What are they thinking when they installed this electric post in the middle of the road? Is there a way to future proof this design? How could they ever know …
Transformer K-Factor Rating and Harmonics
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. K-factor rating is a value …
Harmonics and Power Quality
An ideal power quality for a source of energy to an electrical load is represented by a pure sine wave waveform of voltage. The term pure means that it does …
Phase Sequence of Harmonics
Harmonics of different orders have different phase sequences. What is phase sequence any way? In simple terms, a phase sequence is the order of rotation of phase vectors relative to …
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 …
Compliance to Draft Standards
An article in a professional organization magazine caught my attention. It was about a law suit regarding an incident which according to current standard during the conception of the design, …