Category Archives: Case Studies

Case Studies of Harmonic Problems, Analysis, & Solutions on Transmission Systems

Published by David Mueller, Manager, Power System Studies, Electrotek Concepts Inc., Knoxville, Tennessee, USA Email: dmueller@electrotek.com Published in: 2007 9th International Conference on Electrical Power Quality and Utilisation Abstract Transmission systems around the world are increasingly applying capacitor banks on their transmission systems, primarily to support transmission systems and avoid voltage collapse issues leading toContinue reading “Case Studies of Harmonic Problems, Analysis, & Solutions on Transmission Systems”

2013 Cost of Data Center Outages

Published by Ponemon Institute LLC, December 2013. Ponemon Institute© Research Report is Sponsored by Emerson Network Power. Part 1. Executive Summary Ponemon Institute and Emerson Network Power are pleased to present the results of the 2013 Cost of Data Center Outages. First conducted in 2010, the purpose of this benchmark study is to determine theContinue reading “2013 Cost of Data Center Outages”

Beware Rotation Issues on Transformers

Published by Tom Shaughnessy, Shaughnessy Consulting Services 208 Jasper Way, San Marcos, CA 92078 408-666-4009 Background Phase rotation is something that contractors and electricians routinely check during construction and installation of motors and UPS systems. In facilities with only one service, seldom does a rotation change require utility involvement. However, complications can and do ariseContinue reading “Beware Rotation Issues on Transformers”

The Challenges of Harmonic Measurements to Identify the Source of Harmonic Distortion in a Network

Published by Terry Chandler, A Power Quality Practitioner ™ for 30 years, Director of Engineering Power Quality Thailand LTD/Power Quality Inc. USA,Consultant for Dranetz Corporation USA (Asia business unit General manager) Harmonics defined by multiple standards around the world. IEC 61000-4-7 Class I defines harmonics and how to measure them. IEEE 519-2014 defines harmonic limits.Continue reading “The Challenges of Harmonic Measurements to Identify the Source of Harmonic Distortion in a Network”