Published by Michael Daish, Summit Technology, Inc, Walnut Creek, CA Introduction Our modern technological world depends on systems and processes that require 24 x 7 x 365 operation. When their electrical infrastructures need maintenance it must inevitably be performed on live circuits. This article discusses a procedure to keep workers safe when performing “hot work”.Continue reading “Hot Stuff! Power Monitoring on Live Circuits Can Be Done Safely”
Category Archives: Power Quality
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?”
Learn About Residual Current Device Testing and Safety
Published by Carelabs (Carelabz), Website: carelabz.com Residual Current Device offer a level of personal protection that ordinary fuses and circuit-breakers cannot provide. Residual Current Devices, or RCDs. are safety switches that prevent people from getting electrocuted in homes and businesses. The device monitors the flow of electricity as it enters a property from the main distribution panel. A surge ofContinue reading “Learn About Residual Current Device Testing and Safety”
Power Quality Problems and New Solutions
Published by A. de Almeida, L. Moreira, J. Delgado, ISR – Department of Electrical and Computer Engineering, University of Coimbra, Pólo II, 3030-290 Coimbra (Portugal), Phone: +351 239 796 218, fax: +351 239 406 672, E-mail: adealmeida@isr.uc.pt, licinio@isr.uc.pt, Jdelgado@elect.estv.ipv.pt. Abstract: In this paper, the main Power Quality (PQ) problems are presented with their associated causesContinue reading “Power Quality Problems and New Solutions”
What is an SMPS and how does it generate 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. What is an SMPS and how does it generate harmonics? The Switch-mode Power Supply (SMPS) is found in most power electronics today. Its reduced size and weight, better energy efficiency and lower cost make itContinue reading “What is an SMPS and how does it generate harmonics?”
Voltage Flicker Calculation Methodology
Published by Trishia Swayne, P.E., Leidos.
Why is Electrical Infrared Thermography Inspection Important?
Published by Carelabs (Carelabz), Website: carelabz.com Infrared Scanning of electrical installations falls under classification of Predictive Maintenance Fault Finding. The value is that we are now able to predict an electrical fault before the element fails completely. We are able to get this due to the heat build-up of any electrical element under stress and predict thatContinue reading “Why is Electrical Infrared Thermography Inspection Important?”
Some Comments on Power Acceptability Curves
Published by G. Heydt , Arizona State University Tempe, Arizona USA R. Thallam, Salt River Project Phoenix, Arizona USA M. Albu, Universitatea Politehnica Bucureşti Bucharest, Romania CARIBBEAN COLLOQUIUM ON POWER QUALITY (CCPQ), JUNE 2003 Abstract Power acceptability curves, also known as voltage vulnerability or sensitivity curves, have been used for over 30 years to characterizeContinue reading “Some Comments on Power Acceptability Curves”
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?”
A Technical Investigation of Voltage Sag
Published by 1Vima P. Mali, 2R. L. Chakrasali, 1K. S. Aprameya, 1Electrical and Electronics Engineering Research Centre, University B.D.T. College of Engineering, Davanagere, India. 2Department of Electrical and Electronics Engineering, SDM College of Engineering and Technology, Dharwad, India. Research Paper Source: American Journal of Engineering Research (AJER) 2015. American Journal of Engineering Research (AJER) e-ISSN:Continue reading “A Technical Investigation of Voltage Sag”
Power Quality Blog 