Program Manager EPRI
Mark Stephens is Principal Project Manager for EPRI and the Leader of SEMI F47 Voltage Sag Immunity Task Force. Mark Stephens manages research and services work related to Industrial Power Quality. He is a Senior Member of the Association of Energy Engineers, and several power quality standards working groups in IEEE and CIGRE. With over 33 years of professional experience, Stephens joined EPRI in 1997. His most visible projects include extensive research and management of the seminal EPRI System Compatibility Task 24 research program which led to the development of the SEMI F47 power quality standard in 1999. He was the secretary of the CIGRE C4.110 working group (Voltage dip immunity of equipment in installations), and was involved in the development of IEEE 1668-2017 (Recommended Practice for Voltage Sag and Short Interruption Ride-Through Testing for End-Use Electrical Equipment Rated Less than 1000 V). Stephens has worked to characterize and improve power quality issues in all manufacturing sectors by leading testing and site assessments at customer locations worldwide. He has taught over 70 related courses and is commonly asked to lecture on the subject at conferences. He has written over 20 conference papers on the subject matter as well.