Direction of Harmonics & Flicker

Published by Arbiter Systems, Inc.  Enabling Tomorrow’s Technology Today Overview As regulatory authorities impose ever-stricter requirements for power quality, utilities increasingly want to know which customer is imposing harmonics and flicker on the utilities power system. As a result, we are often asked if we can determine the “direction” of harmonic power flow, and whatContinue reading “Direction of Harmonics & Flicker”

Need of Voltage Quality Regulation in the Future

Published by S.Bhattacharyya, Dr. J.M.A.Myrzik, J.F.G.Cobben, and Prof. W.L.Kling,  Electrical Power Systems Group Technical University Eindhoven Eindhoven, the Netherlands E-mail: s.bhattacharyya@tue.nl M.van Lumig and Dr. M.Didden Business Development Team Laborelec NL Beek-Maastricht Airport, the Netherlands Published in 9th International Conference on Electrical Power Quality and Utilisation Date: 9-11 Oct. 2007, Barcelona, Spain Abstract Electricity as aContinue reading “Need of Voltage Quality Regulation in the Future”

PQ Monitoring Standards – What You Need To Know

DESCRIPTION There’s an age-old problem in the Power Quality (PQ) monitoring industry – measure the same circuit with instruments from different manufactures at the same time, and you could get different results! Which one do you believe? Do you trust any of them? There have been electrical energy monitoring standards for many years that defineContinue reading “PQ Monitoring Standards – What You Need To Know”

Voltage Tolerance Boundary

Published by Pacific Gas and Electric Company (PG&E), January 1999. The only national standard for utilization voltage regulation is ANSI C84.1. Its title is American National Standard for Electric Power Systems and Equipment – Voltage Ratings (60 Hertz). The first version in 1954 was a combination of two standards, one from the Edison Electric InstituteContinue reading “Voltage Tolerance Boundary”

The Effects of Changes to IEEE 519-1992 to 2014

Published by EATON, Powering Business Worldwide Application Note AP040094EN, Effective November 2014 Introduction Recent changes have been made to IEEE 519. These revisions add clarity to the 1992 document as well as present new definitions, methods and recommendations. This brief summary of changes to IEEE 519 as it pertains to low voltage adjustable frequency drivesContinue reading “The Effects of Changes to IEEE 519-1992 to 2014”

Examples of Capabilities of Class A PQ Instruments vs Dranetz Instruments with Beyond Class A Capability

Published by Terry Chandler, Director of Engineering, Power Quality Thailand LTD/Power Quality Inc., USA. E-mail: terryc@powerquality.org, terryc@powerquality.co.th Please feel free to leave a question in the comments section or contact Terry Chandler, terryc@powerquality.org, terryc@powerquality.co.th