Standard EN 50160 – Voltage Characteristics of Public Distribution Systems

Published by Henryk Markiewicz, Email: henryk.markiewicz@pwr.wroc.pl, & Antoni Klajn, Email: antoni.klajn@pwr.wroc.pl, Wroclaw University of Technology, July 2004. Website: http://www.pwr.wroc.pl Source: Leonardo Power Quality Initiative (LPQI) Power Quality Application Guide Voltage Disturbances 5.4.2 Standard EN 50160 Introduction Electrical energy is a product and, like any other product, should satisfy the proper quality requirements. If electrical equipmentContinue reading “Standard EN 50160 – Voltage Characteristics of Public Distribution Systems”

Power Quality Measurements in All Voltage Levels of the Utilities up to 150 kHz – Is it Possible?

Published by Roland Buerger (MBS AG), Business Development/R & D, MBS AG, Sulzbach-Laufen (Germany), Email: rbuerger@mbs-ag.com Bernhard Grasel (NEO MESSTECHNIK), Sales Manager, NEO Messtechnik, Zoebern (Austria), Email: bernhard.grasel@neo-messtechnik.com A reliable energy supply has meanwhile become an important location factor for many companies. While power failures and voltage fluctuations were among the most important parameters ofContinue reading “Power Quality Measurements in All Voltage Levels of the Utilities up to 150 kHz – Is it Possible?”

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”

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”

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 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”

Part 3: AC Power Distribution Systems & Standards

Published by Nikola Zlatanov* Short-Circuit Currents – General The amount of current available in a short-circuit fault is determined by the capacity of the system voltage sources and the impedances of the system, including the fault. Voltage sources include the power supply (utility or on-site generation) plus all rotating machines connected to the system atContinue reading “Part 3: AC Power Distribution Systems & Standards”

Part 2: AC Power Distribution Systems & Standards

Published by Nikola Zlatanov* Voltage Classifications ANSI and IEEE® standards define various voltage classifications for single-phase and three-phase systems. The terminology used divides voltage classes into: Low voltage Medium voltage High voltage Extra-high voltage Ultra-high voltage Table 1.1-1 presents the nominal system ese classifications. Voltages and Voltage Ranges (From IEEE Standard 141-1993) BIL—Basic Impulse LevelsContinue reading “Part 2: AC Power Distribution Systems & Standards”

Part 1: AC Power Distribution Systems & Standards

Published by Nikola Zlatanov Mr. Nikola Zlatanov spent over 20 years working in the Capital Semiconductor Equipment Industry. His work at Gasonics, Novellus, Lam and KLA-Tencor involved progressing electrical engineering and management roles in disruptive technologies. Nikola received his Undergraduate degree in Electrical Engineering and Computer Systems from Technical University, Sofia, Bulgaria and completed aContinue reading “Part 1: AC Power Distribution Systems & Standards”

Measurement Practices for Reliability and Power Quality: Appendix D and E

Published by John D. Kueck and Brendan J. Kirby, Oak Ridge National Laboratory Philip N. Overholt, U.S. Department of Energy Lawrence C. Markel, Sentech, Inc. Published in Measurement Practices for Reliability and Power Quality: A Toolkit of Reliability Measurement Practices, 2004 Prepared by Oak Ridge National Laboratory Oak Ridge, Tennessee 37831-6285 managed by UT-BATTELLE, LLCContinue reading “Measurement Practices for Reliability and Power Quality: Appendix D and E”