Applications Guide, April 2001 Published by Fluke Corporation Introduction This section provides easy-to-do measurements which you can perform almost anywhere. Begin with these examples to get started with the Fluke 43B. Note: It is a good idea to reset the Fluke 43B before you start a new application. This way, you always start from theContinue reading “Fluke 43B PQ Analyzer – Basic Measurements”
Author Archives: PQBlog
Power Quality Standards for Utility Wind and Solar Power Plants
Published by David Mueller, E. H. Camm. Abstract Power quality standards exist to guide the interconnection requirements of large wind and solar plants. IEEE guidelines exist for flicker and harmonics, while IEC guidelines exist for the measurement criteria of power quality phenomena and the characterization of wind turbine equipment. There are also some uniform guidelinesContinue reading “Power Quality Standards for Utility Wind and Solar Power Plants”
Bridging the Gap Between Signal and Power
Assessing Power System Quality using Signal Processing Techniques Published by Math H.J. Bollen1, Irene Y.H. Gu2, Surya Santoso3, Mark F. McGranaghan4, Peter A. Crossley5, Moisés V. Ribeiro6, and Paulo F. Ribeiro7 Source: IEEE Signal Magazine, 2009 Signal processing has been used in many different applications, including electric power systems. This is an important category, sinceContinue reading “Bridging the Gap Between Signal and Power”
Low Voltage Distribution Board Safety
March, 2007 Published by Terry Chandler Director of Engineering, Power Quality Thailand LTD/Power Quality Inc., USA. Emails: terryc@powerquality.org, terryc@powerquality.co.th Accidental Death is REAL!! Electrical Shock Fatalities in the USA Electric shocks are responsible for about 1,000 deaths in the United States each year, or about 1% of all accidental deaths. Electric shocks cause death in 3-15% of cases.Continue reading “Low Voltage Distribution Board Safety”
Earthing System
How To Choose The Right System Earthing Arrangement? Application Note, 2009 Published by Schneider Electric Source: https://www.se.com/ww/en/download/document/DBTP72ART_EN/ All System Earthing Arrangements (SEA) provide equivalent protection of life and property. However each has certain advantages and inconveniences in other terms that may be important for a given installation. In both commercial and industrial applications, needs change,Continue reading “Earthing System”
Defining Interharmonics
White Paper, April 2013 Contributed by Chris Mullins, VP of Engineering and Operations, Power Monitors, Inc. Email: cmullins@powermonitors.comWebsite: http://www.powermonitors.comTel: 800.296.4120 ABSTRACT Interharmonics are frequency components at noninteger harmonics of the line frequency. The proliferation of large DC-converter variable speed drives and wind/solar inverter generation has led to an increase in interharmonic levels. Troubleshooting the resultingContinue reading “Defining Interharmonics”
Part 7: AC Power Distribution Systems & Standards (Overcurrent, Fuse & Circuit Breaker)
Published by Nikola Zlatanov* Complete Overcurrent Device Interest in complete overcurrent device selectivity has increased due to the addition of selectivity requirements to articles 700, 701, and 708 of the National Electrical Code (NFPA70). Many users, both commercial and industrial, use fuses and circuit breakers simultaneously. Traditional Time- Current Curve (TCC) analysis is known toContinue reading “Part 7: AC Power Distribution Systems & Standards (Overcurrent, Fuse & Circuit Breaker)”
Part 6: AC Power Distribution Systems & Standards (Power Quality)
Published by Nikola Zlatanov* Power Quality Terms Technical Overview Introduction Sensitive electronic loads deployed today by users require strict requirements for the quality of power delivered to loads. For electronic equipment, power disturbances are defined in terms of amplitude and duration by the electronic equipment operating envelope. Electronic loads may be damaged and disrupted, withContinue reading “Part 6: AC Power Distribution Systems & Standards (Power Quality)”
Part 5: AC Power Distribution Systems & Standards
Published by Nikola Zlatanov* Medium Voltage Equipment Surge Protection Considerations Transformers If the voltage withstand/BIL rating of the transformer is less than that of the switchgear feeding the transformer, surge protection is recommended at the transformer terminals, in line with established practices. In addition, consideration should be given to using surge arresters and/or surge capacitorsContinue reading “Part 5: AC Power Distribution Systems & Standards”
Part 4: AC Power Distribution Systems & Standards
Published by Nikola Zlatanov* Ground Fault Protection Article 230.95 of NEC requires ground- fault protection of equipment shall be provided for solidly grounded wye electrical services of more than 150 V to ground, but not exceeding 600 V phase-to-phase for each service disconnect rated 1000 A or more. The rating of the service disconnect shallContinue reading “Part 4: AC Power Distribution Systems & Standards”
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