Survey of users´ experience with adjustable speed drives rated 500 HP and above

Many electric utilities in Canada, including Ontario Hydro are encouraging their customers to review their processes and applications to identify opportunities for saving energy. The work which was sponsored by Ontario Hydro to survey users´ experience with adjustable speed drives rated 500 HP and above is reviewed. The purpose of the survey was to gather field data on the performance of the ASD, its associated equipment, and the process. The questionnaire sent to users is reviewed, and survey findings for AC ASDs are reviewed. Conclusions and suggestions based on the responses gathered in the study are presented