Author Archives: PQBlog

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”

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 is Load Flow Analysis / Power Flow Analysis and Why is it Done?

Published by Carelabs (Carelabz), Website: carelabz.com Load Flow Analysis / Power Flow Analysis Power systems across the world subjected to great demands owing to expansions in the networks. Rapid development of a nation in every sphere is interlinked with its power transmission capacity. This can be done by adding new lines and by upgrading existing onesContinue reading “What is Load Flow Analysis / Power Flow Analysis and Why is it Done?”

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?”

What is Short Circuit Analysis, and Why is it Done?

Published by Carelabs (Carelabz), Website: carelabz.com A Short circuit analysis is used to determine the magnitude of short circuit current, the system is capable of producing, and compares that magnitude with the interrupting rating of the overcurrent protective devices (OCPD). Since the interrupting ratings are based by the standards, the methods used in conducting a short circuitContinue reading “What is Short Circuit Analysis, and Why is it Done?”