June 2007 Replacing Motor-Generator Sets
SPECIAL NOTICE: Please check each course for verification of approval before purchasing. This test is based on the article, Replacing Motor-Generator Sets with Modern Static DC Drives and counts as 1 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:
- the drawbacks of motor-generator sets.
- the value of static DC drives.
- considerations when replacing a motor-generator set with a digital DC drive.
- input power considerations.
- the issue of power-line distortion.
- sizing criteria for transformers.
- output power considerations.
- ripple-filter recommendations and adjustments.
- car-controller considerations in a modernization with a DC drive.
- commissioning a DSD 412 DC elevator drive.
- verification of motor data and wiring.>
- motor field board setup.
- recording motor data and encoder setup.
- grounding considerations
- power-up verification and advanced diagnostics.
- 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.