This course is based on the article, Variable-Frequency Drive Systems for Hydraulic Elevators, published in the October 2011 issue and counts as one contact hour (0.1 CEU) of elevator-industry continuing-education credit. Approved by: NAEC for CET, QEI Services and NAESA for QEI (A maximum of 0.2 CEU for online courses per annual renewal period can be applied towards maintenance of qualifications for certified inspectors.) and the states of Florida, Pennsylvania, Arkansas, Kentucky, Virginia and West Virginia.
Learning Objectives - After reading this article, you should have learned about:
- Why variable-speed drives are Important
- Which type of variable-speed drives are useful for different applications
- Conventional ride types with electronic control
- How mechanical and electric control valves differ in their effects on the elevator system
- The effects of frequency-controlled up and down rides on the elevator system
- What to use when power connectivity is limited
- The benefits of and applications of use for recovery and hydraulic recuperation
- How to best deal with high ride Frequency
- Load-dependent speed reduction
Enrollment Procedures:- Include your full name when purchasing the online course.
- Within 2 to 3 business days you will receive an email with the article and instructions for taking the exam.
- Study article.
- Use the provided online link, ID, and Password to login to the Online Testing Center.
- If you scored 80% or above you can immediately print your certificate of completion. If you score below 80% you will have up to two free retakes.