Author Archives: PQBlog

Detailed Analysis of Class F1/F3 Flickermeter Implementations According to the Recent IEC Standards

Published by Pavel Štěpán, Technical University of Liberec – CZE, Email: Pavel.Stepan@tul.cz Leoš Kukačka, Technical University of Liberec – CZE, Email: Leos.Kukacka@tul.cz Jan Kraus, Technical University of Liberec – CZE, Email: Jan.Kraus@tul.cz CIRED 23rd International Conference on Electricity Distribution, Lyon, 15-18 June 2015. Paper 1077. ABSTRACT The paper is concerned with specific problems of flicker meterContinue reading “Detailed Analysis of Class F1/F3 Flickermeter Implementations According to the Recent IEC Standards”

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”

The Seven Types of Power Problems

Published by Joseph Seymour, Schneider Electric – Data Center Science Center White Paper 18 Rev 1. Executive Summary Many of the mysteries of equipment failure, downtime, software and data corruption, are the result of a problematic supply of power. There is also a common problem with describing power problems in a standard way. This whiteContinue reading “The Seven Types of Power Problems”

Power Quality: New Tendencies in Standardization and Challenges of Energiewende

Published by Dr. Michael Schwenke, Siemens AG, Germany, Email: Michael.Schwenke@siemens.com Manfred Unterweger, Siemens AG, Germany, Email: Manfred.Unterweger@siemens.com CIRED 23rd International Conference on Electricity Distribution, Lyon, 15-18 June 2015. Paper 0372. ABSTRACT Energiewende changes the structure of power supply networks from traditional supply structures to decentralized structures. The measurement of power quality has to be adaptedContinue reading “Power Quality: New Tendencies in Standardization and Challenges of Energiewende”

Learn About How Earth Fault Loop Impedance Testing Is Done

Published by Carelabs (Carelabz) Why Earth Fault Loop Impedance Test is Done?  Every circuit must be tested to make sure that the actual loop impedance does not exceed that specified for the protective device concerned. Because of the severity of coming into contact with an electrical fault, having your electrical installations and power points tested forContinue reading “Learn About How Earth Fault Loop Impedance Testing Is Done”

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”