Harmonics / K-factor Ratings

Published by Siemens Canada, Siemens Limited Power Product Catalogue, Canadian Edition 2019. Section 18 – Technical, Contents: Harmonics / K-factor Ratings (18-16, 18-17) Non-Linear Loads When a sinusoidal voltage is applied to a linear load, the resultant current waveform takes on the shape of a sine wave as well. Typical linear loads are resistive heatingContinue reading “Harmonics / K-factor Ratings”

How reliable are transformer energy efficiency tests (including Independent 3rd Party) under non-linear loading?

Published by Mirus International Inc., [2010-01-08] MIRUS-FAQ001-B2, FAQ’s Harmonic Mitigating Transformers, 31 Sun Pac Blvd., Brampton, Ontario, Canada. L6S 5P6. It is much more difficult to accurately determine the energy efficiency of a transformer under non-linear loading than it is under linear loading. The industry accepted technique for measuring transformer efficiency under linear load involvesContinue reading “How reliable are transformer energy efficiency tests (including Independent 3rd Party) under non-linear loading?”

Real Time Sustainable Power Quality Analysis of Non-Linear Load under Symmetrical Conditions

Published by Pavan Babu Bandla 1, Indragandhi Vairavasundaram 1, Yuvaraja Teekaraman 2, Ramya Kuppusamy 3 and Srete Nikolovski 4,* 1School of Electrical Engineering, Vellore Institute of Technology, Vellore 632014, India2MOBI-Mobility, Logistics and Automotive Technology Research Centre, Vrije Universiteit Brussel, 1050 Brussels, Belgium3Department of Electrical and Electronics Engineering, Sri Sairam College of Engineering, Bangalore 562106, India4PowerContinue reading “Real Time Sustainable Power Quality Analysis of Non-Linear Load under Symmetrical Conditions”

What constitutes an EPA Energy Star Transformer and is it important when supplying non-linear loads?

Published by Mirus International Inc., [2010-01-08] MIRUS-FAQ001-B2, FAQ’s Harmonic Mitigating Transformers, 31 Sun Pac Blvd., Brampton, Ontario, Canada. L6S 5P6. The Energy Star program is sponsored by the US Environmental Protection Agency (EPA) and is designed to encourage the use of energy efficient products. The Energy Star logo is found on many household appliances andContinue reading “What constitutes an EPA Energy Star Transformer and is it important when supplying non-linear loads?”

What ill effects do harmonics created by the computer power supplies have on themselves?

Published by Mirus International Inc., [2010-01-08] MIRUS-FAQ001-B2, FAQ’s Harmonic Mitigating Transformers, 31 Sun Pac Blvd., Brampton, Ontario, Canada. L6S 5P6. As voltage becomes more and more distorted, it will begin to have a negative effect on the connected equipment. A flat-topped voltage waveform can affect a switch-mode power supply (SMPS) in at least 2 majorContinue reading “What ill effects do harmonics created by the computer power supplies have on themselves?”

How do non-linear loads create current and voltage harmonics?

Published by Mirus International Inc., [2010-01-08] MIRUS-FAQ001-B2, FAQ’s Harmonic Mitigating Transformers, 31 Sun Pac Blvd., Brampton, Ontario, Canada. L6S 5P6. The switch-mode power supply (SMPS), used in most digital electronic equipment, is an excellent example of a non-linear load. Because it draws current in non-sinusoidal pulses, the SMPS is a significant generator of harmonic currents.Continue reading “How do non-linear loads create current and voltage harmonics?”

What problems do non-linear loads and harmonics create?

Published by Mirus International Inc., [2010-01-08] MIRUS-FAQ001-B2, FAQ’s Harmonic Mitigating Transformers, 31 Sun Pac Blvd., Brampton, Ontario, Canada. L6S 5P6. Most power systems can accommodate a certain level of harmonic currents but will experience problems when they become a significant component of the overall load. As these higher frequency harmonic currents flow through the powerContinue reading “What problems do non-linear loads and harmonics create?”

Why do non-linear loads have low power factors and why is it important to have a high power factor?

Published by Mirus International Inc., [2010-01-08] MIRUS-FAQ001-B2, FAQ’s Harmonic Mitigating Transformers, 31 Sun Pac Blvd., Brampton, Ontario, Canada. L6S 5P6. Power factor is a measure of how effectively a specific load consumes electricity to produce work. The higher the power factor, the more work produced for a given voltage and current. Figure 3-1 shows theContinue reading “Why do non-linear loads have low power factors and why is it important to have a high power factor?”

Do different types of non-linear loads generate different harmonics?

Published by Mirus International Inc., [2010-01-08] MIRUS-FAQ001-B2, FAQ’s Harmonic Mitigating Transformers, 31 Sun Pac Blvd., Brampton, Ontario, Canada. L6S 5P6. By far the majority of today’s non-linear loads are rectifiers with DC smoothing capacitors. These rectifiers typically come in 3 types – (i) single phase, line-to-neutral, (ii) single phase, phase-to-phase and (iii) three-phase. Single-phase line-to-neutralContinue reading “Do different types of non-linear loads generate different harmonics?”

What are non-linear loads and why are they a concern today?

Published by Mirus International Inc., [2010-01-08] MIRUS-FAQ001-B2, FAQ’s Harmonic Mitigating Transformers, 31 Sun Pac Blvd., Brampton, Ontario, Canada. L6S 5P6. A load is considered non-linear if its impedance changes with the applied voltage. The changing impedance means that the current drawn by the non-linear load will not be sinusoidal even when it is connected toContinue reading “What are non-linear loads and why are they a concern today?”