Protection of the Neutral Conductor
Overload detection shall be provided for the neutral conductor in a multi-phase circuit Where the cross-sectional area of the neutral conductor is less than that of the line conductors. The …
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 …
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 …
Harmonics and Neutral Currents
Before the advent of computers, variable speed drives, soft starters and other non-linear loads, the only source of harmonics in power systems are industrial plants using arc-furnaces. These arc-furnaces require …
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 …