Published by Richard P. Bingham, Dranetz Technologies, Inc., USA Prepared for the Conference on Protecting Electrical Networks and Quality of Supply, Heathrow, UK, 22-23 January 1997 ABSTRACT The typical power quality problem starts with a frantic call to the facility’s engineer or electric shop supervisor concerning some malfunction that has either shut down production orContinue reading “Simple Rules for Solving Power Quality Mysteries”
Tag Archives: Voltage Sags/Surges
Determining Sag Directivity
Application Note INTRODUCTION Voltage sags, or dips are the most common type of power quality (PQ) event. Knowing the directivity of the sag, or where it originated, is very import when trying to locate its source and to ultimately mitigate the problem. This application note outlines some rules of thumb to help determine the directivityContinue reading “Determining Sag Directivity”
Characterizing Voltage Sag Waveforms using IEEE P1159.2 Algorithms
Published by Dan Sabin, Monitoring System Applications Architect, Electrotek.
Loose Bus Bar Bolts Cause Sags
Published by Dranetz – BMI Case Studies An administration building in a government complex in New Jersey had a transformer with a 4KV primary, 120/208V wye, 800A secondary. The buss duct ran up to a second-floor panel, which supplied an office area. Computer misoperations and lights flickering were occurring randomly for nearly two years. EmergencyContinue reading “Loose Bus Bar Bolts Cause Sags”
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