Published by Dranetz Technologies, Inc., Application Note Introduction IEEE Std. 519-2014, IEEE Recommended Practice and Requirements for Harmonic Control in Electric Power Systems is the most current recommended practice from the IEEE related to harmonics measurement and compliance. Although the recommended practices from the IEEE are usually only followed in North America, IEEE 519-2014 is usedContinue reading “Dranetz HDPQ Plus & SP Products and IEEE 519-2014”
Yearly Archives: 2021
Neutral Sizing in Harmonic Rich Installations
Published by Prof Jan Desmet, Hogeschool West-Vlaanderen, Email: jan.desmet@howest.be & Prof Angelo Baggini, Università di Bergamo, Email: angelo.baggini@unibg.it, June 2003 Source: Leonardo Power Quality Initiative (LPQI) Power Quality Application Guide Harmonics Neutral Sizing in Harmonic Rich Installations 3.5.1 Introduction This section discusses the sizing of neutral conductors in the presence of power quality problems suchContinue reading “Neutral Sizing in Harmonic Rich Installations”
What is Automatic Transfer Switch Testing & How is it Done
Published by Carelabs (Carelabz), Website: carelabz.com A transfer switch’s main job is to redistribute power from a grid to a backup source of power. The control panel system of a transfer switch is what makes the unit automatic in nature. Power failures can be detected immediately with the help of automatic transfer switch (ATS) and theContinue reading “What is Automatic Transfer Switch Testing & How is it Done”
Dranetz Encore System monitoring BNL/BP Solar Photovoltaic (PV) Plant
Why do 3rd harmonic currents overload neutral conductors?
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. Figure 7-1 shows how the sinusoidal currents on the phases of a 3-phase, 4-wire system with linear loads sum to return on the neutral conductor. The 120° phase shift between the sinusoidal load currents causesContinue reading “Why do 3rd harmonic currents overload neutral conductors?”
Evaluating Supraharmonics up to 150 kHz in Electric Vehicles at the University of Applied Sciences Bingen
Published by Jürgen Blum, Product Manager, Power Quality, A. Eberle GmbH & Co. KG In the first part of the measurement campaign of 2016, various electric vehicles were evaluated in terms of their charging behavior and their loading effects on the power grid. The evaluation covered from DC up to the 50th harmonic or supraharmonicsContinue reading “Evaluating Supraharmonics up to 150 kHz in Electric Vehicles at the University of Applied Sciences Bingen”
Variable Frequency Drive (VFD) Testing Applications
Published by Dranetz Technologies, Inc. VFD motor controls have become very popular for both retrofits and in new applications. They offer increased energy efficiency, potential for less motor wear, lower startup currents and more. Potential disadvantageous include producing harmonics and damaged motors if they are not controlled properly. VFD’s use a Pulse Width Modulated (PWM) voltageContinue reading “Variable Frequency Drive (VFD) Testing Applications”
What is Contact Resistance Test and Why is Contact Resistance Testing Done
Published by Carelabs (Carelabz), Website: carelabz.com What is Contact Resistance Contact resistance is the resistance to current flow, due to surface conditions and other causes, when contacts are touching one another (in the closed condition of the device). This can occur between contacts of: Breakers Contactors Relays Switches Connectors Other switching devices Contact resistance testing alsoContinue reading “What is Contact Resistance Test and Why is Contact Resistance Testing Done”
Hot Stuff! Power Monitoring on Live Circuits Can Be Done Safely
Published by Michael Daish, Summit Technology, Inc, Walnut Creek, CA Introduction Our modern technological world depends on systems and processes that require 24 x 7 x 365 operation. When their electrical infrastructures need maintenance it must inevitably be performed on live circuits. This article discusses a procedure to keep workers safe when performing “hot work”.Continue reading “Hot Stuff! Power Monitoring on Live Circuits Can Be Done Safely”
What problems do non-linear loads and harmonics create?
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. Most power systems can accommodate a certain level of harmonic currents but will experience problems when they become a significant component of the overall load. As these higher frequency harmonic currents flow through the powerContinue reading “What problems do non-linear loads and harmonics create?”
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