2014 February VF Drives
SPECIAL NOTICE: Please check each course for verification of approval before purchasing. This test is based on the article, VF Drives published in the February 2014 issue and counts as one contact hour (0.1 CEU) of elevator industry continuing education credit. Most courses approved by NAEC for CET/CAT and NAESAI for QEI and in the following states: Alabama, Arkansas, Florida, Georgia, Illinois, Indiana, Kentucky, Maryland, Mississippi, Missouri, Montana, Oklahoma, Pennsylvania, Vermont, Virginia, Washington, West Virginia, Wisconsin. Learning Objectives - After reading this article, you should have learned about:
- Why the electric motor dominated elevator applications
- The relative advantages of DC and AC motors
- How synchronous and asynchronous motors compare
- The basic parts of a variable-frequency (VF) drive
- How to use a multimeter to troubleshoot a VF drive
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- For articles, click the "Read Article" tab above to download and study the article. For other courses, be sure to purchase the corresponding book.
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- Follow the instructions on the purchase confirmation page to log in to the Online Testing Center.
- If you scored 80% or above, you can immediately print your certificate of completion. If you fail the exam, you will be given instructions on how to pay a re-take fee and take the exam again.