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, published in the June 2007 issue 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, 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.

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