Application of Variable Frequency Drives 1 to 200 HP


Please plan to attend this meeting of the Industry Applications Society. The speaker will be Kevin Harper, specialist in training and application of Variable Frequency Drives for Norman S Wright Mechanical Inc.

The presentation will cover the various types of HVAC VFD’s (Pumps, Compressors and Fans), and a brief history of AC drives. Also, the application, operation, and the effects on the electric system with VFD’s installed; this includes mitigation and/or the filtering of Harmonics and how to specify key features and performance for best integration, safety and longevity in your HVAC projects.


  Date and Time




  • Zio Fraedos, 611 Gregory Lane
  • Pleasant Hill, California
  • United States 94523



Application of Variable Frequency Drives 1 to 200 HP


Kevin Harper has worked 38 years as a Maintenance Electrician /Instrument Tech/ technical Trainer, 6 years with the US Navy, worked in the shipyards for 6 months, over 22 years at the former NUMMI automotive plant, and 5 years in wastewater treatment. Since 2013 he has been the Variable Frequency Drive specialist for the HVAC equipment supplier Norman S Wright Mechanical, covering the California, Nevada and Pacific offices. Kevin has worked with VFD’s since 1985, as well as training others on their applications, integration, principles, operation, programming and troubleshooting.


Zio Fraedos

611 Gregory Lane, Pleasant Hill. Call 925-933-9091 if you need directions.

No-host social at 5:30 pm; Presentation at 6:15pm; Dinner at 7:15 pm;

Please make reservations by March 14 by contacting Luis Soria via email:  or telephone: (415) 793-7909

The cost of dinner is $25 for IEEE members, $15 for student and retired members;

$30 for non-members.


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