SPECIAL NOTICE: Please check each course for verification of approval before purchasing.
This test is based on the article, Elevator Drives, Power Quality and Energy Savings, published in the December 2011 issue and counts as one contact hour (0.1 CEU) of elevator-industry continuing-education credit. Most courses are approved by NAEC for CET/CAT and NAESAI for QEI and in the following states: Alabama, Arkansas, Colorado, Florida, Georgia, Illinois, Indiana, Kentucky, Maryland, Mississippi, Missouri, Oklahoma, Pennsylvania, Vermont, Virginia, Washington, West Virginia, Wisconsin.
Learning Objectives - After reading this article, you should have learned about:
- The basic components and operation of an elevator VFD and regenerative unit
How AC elevator drives create current harmonics
- How current harmonics create voltage distortion and affect the operation of electrical equipment
- How current harmonics can be reduced in elevator VFDs. The relative cost and performance of various harmonic mitigation and regenerative solutions
Enrollment Procedures:
- If you do not already have an account on elevatorbooks.com, you will need to create one. NOTE: the name of the person purchasing must be the same name as the person who will take the exam.
- For articles, click the "Read Article" tab above to download and study the article. For other courses, be sure to purchase the corresponding book.
- Include your full name when purchasing the exam.
- 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.
