www.PDHonline.com - Your Gateway to Lifelong Learning   |   Email: PDHonline@Gmail.com   
 
Current
Price
Course
Number
PDH Online Course Description PDH Units/
Learning Units (Hours)
$89

Buy Now

View Course

View or Take Quiz
E121
Calculating Motor Start Time

Timothy L. O'Hearn, P.E.

A method is described to approximate the motor starting time using the characteristics provided by the manufacturer. The motor torque versus speed curve, the load torque versus speed curve, and the current versus speed curve are utilized along with the rotating inertia to calculate the acceleration time for the motor. The acceleration curve is plotted on a time versus current curve along with the motorís thermal limits to select the proper over current protection. A discussion of the results and the methodology for the calculation is included. An example calculation is included for discussion purposes. This course includes a multiple-choice quiz at the end, which is designed to enhance the understanding of the course materials.

View Course Content

NY PE & PLS: You must choose courses that are technical in nature or related to matters of laws and ethics contributing to the health and welfare of the public. NY Board does not accept courses related to office management, risk management, leadership, marketing, accounting, financial planning, real estate, and basic CAD. Specific course topics that are on the borderline and are not acceptable by the NY Board have been noted under the course description on our website.

AIA Members: You must take the courses listed under the category "AIA/CES Registered Courses" if you want us to report your Learning Units (LUs) to AIA/CES. If you take courses not registered with AIA/CES, you need to report the earned Learning Units (not qualified for HSW credits) using Self Report Form provided by AIA/CES.

3