Tag Archives: Harmonics

Summary of U.S. Distribution System Power Quality Levels

Published by D. D. Sabin, Email: dsabin@electrotek.com D. L. Brooks, Email: dbrooks@electrotek.com Electrotek Concepts, Inc., 409 North Cedar Bluff Road, Suite 500, Knoxville, Tennessee 37923-3605, United States A. Sundaram, Email: asundara@epri.com S. Bhatt, Email: sbhatt@epri.com Electric Power Research Institute, 3412 Hillview Avenue, Palo Alto, California 94304-1395, United States Abstract The Distribution System Power Quality ProjectContinue reading “Summary of U.S. Distribution System Power Quality Levels”

Harmonics & Waveform Measurements Low Pass Filter & Sine Wave Filter for a 460V 100HP AC Motor with VFD

Published by Dranetz™ Technologies, Inc., Case Study, Website: dranetz.com. This case study was submitted by Ing. Leopoldo Martínez Basulto, Dranetz México. INTRODUCTION Harmonics are an important PQ issue today. Variable Frequency Drives (VFD), Uninterruptible Power Systems (UPS), computers, LED lighting, electronic ballasts, etc. are widely used in all kinds of facilities. It is well knownContinue reading “Harmonics & Waveform Measurements Low Pass Filter & Sine Wave Filter for a 460V 100HP AC Motor with VFD”

Key Changes and Differences between the New IEEE 519- 2014 Standard and IEEE 519-1992

Written by Ian Wallace, Chief Engineer, Power Quality Solutions, TCI® Technical Paper. Introduction IEEE Std 519-2014 is a newly published revision to the IEEE Recommended Practice and Requirements for Harmonic Control in Electric Power Systems. It supersedes the IEEE Std 519-1992 revision. The overarching goal of the 2014 revision is the same as the 1992Continue reading “Key Changes and Differences between the New IEEE 519- 2014 Standard and IEEE 519-1992”

Knowing IEC 61000-4-30 Class A

Published by Elspec Power quality refers to a set of electrical boundaries defined by various documented rules designed to allow electrical equipment to function in its intended manner without significant loss of performance or life expectancy, this includes the steady and stable supply of electricity delivered by the grid. In order to achieve this aimContinue reading “Knowing IEC 61000-4-30 Class A”

What is Harmonic Study and Analysis and Why it is Done?

Published by Carelabs (Carelabz) The current significant growth in electronic devices focusing providing our installations has given rise to a significant change in the last few years on the type of loads connected to the electrical distribution system. Not so long ago the only concern there was when using electricity at home, in establishments andContinue reading “What is Harmonic Study and Analysis and Why it is Done?”

Power Quality Measurement and Analysis Basics

Published by Randy Barnett, Certified Energy Auditor and Trainer for NTT, Centennial, Colo. Email: randy@randybarnett.net , March 1st, 2012. How to interpret the results of a power quality site survey Analyzing electrical parameters associated with distributing electricity is viewed by many as complex engineering work. Yet, for engineers, electricians, and technicians troubleshooting equipment problems theseContinue reading “Power Quality Measurement and Analysis Basics”

Application Guide for Solving Harmonic Problems

Published by MYRON ZUCKER INC. , Website: http://www.myronzucker.com Definitions Harmonics are multiples of the fundamental frequency of an electrical power system. If, for example, the fundamental frequency is 60 Hz, then the 5th harmonic is five times that frequency, or 300 Hz. Likewise, the 7th harmonic is seven times the fundamental, or 420 Hz, andContinue reading “Application Guide for Solving Harmonic Problems”

Harmonic Current and Voltage Distortion

Published by Michael Z. Lowenstein, President of Harmonics Ltd., Monroe, Conn. Nov 1st, 2002. To obtain the effective voltage for a system in which voltages of several frequencies are present, you must add the voltages in an rms fashion. Understanding the causes, similarities, and differences between current and voltage distortion will help you pinpoint mostContinue reading “Harmonic Current and Voltage Distortion”