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Harmonics and UPS

COURSE NO: E04-051
Harmonics and UPS
Course Highlights

This online engineering PDH course provides information on the different UPS configurations and their effect on harmonic levels in electrical networks.


UPS equipment, like the majority of static converters, take energy from an AC network through rectifiers. Typically, rectifiers are equipped with thyristors that generate harmonics.


This course highlights the need for a standardized coexistence between polluting and polluted equipment. It also details which harmonic currents and voltages are generated by conventional (classic) rectifiers (thyristor Graetz bridge rectifier) and provides different solutions that are designed to minimize harmonic impact.


This 4 PDH online course is applicable to electrical engineers who are interested in knowing how UPS equipment affects the overall power quality, particularly current and voltage harmonics.
Learning Objectives

This continuing education course is intended to provide you with the following specific knowledge and skills:

  • Familiarizing with Thyristor Graetz bridge rectifiers
  • Understanding harmonic currents generated by Graetz bridge rectifiers
  • Learning about the minimization of harmonic disturbances
  • Learning about the use of double bridge rectifiers
  • Gaining a general overview on rectifier circuits with more than two bridges
  • Learning about the special case of circuit connection called "phase shifting"
  • Understanding the utilization of a passive filter for harmonics
Course Document
In this course, you need to review the course document titled, “Harmonics and UPS” which is prepared by Velimir Lackovic, Char. Eng.
To view, print and study the course document, please click on the following link(s):
Course Quiz
Once you complete your course review, you need to take a multiple-choice quiz consisting of twenty (20) questions to earn 4 PDH credits. 
The minimum passing score is 70%. There is no time limit on the quiz, and you can take it multiple times until you pass at no additional cost.
Certificate of Completion

Upon successful completion of the quiz, print your Certificate of Completion instantly. (Note: if you are paying by check or money order, you will be able to print it after we receive your payment.) For your convenience, we will also email it to you. Please note that you can log in to your account at any time to access and print your Certificate of Completion.

To buy the course and take the quiz, please click on: