Harmonics Webinar (PQ-103) 2-Day September 18, 19, 2025 (8 am - 12pm)

This eight-hour seminar explains harmonic distortion and its causes, identifies problems associated with harmonics and practical limits for harmonic distortion. The seminar teaches methods to identify, reduce and to avoid harmonics problems and how to predict estimated levels of harmonic distortion.

Several real-life examples are worked as a group to demonstrate the techniques used to perform basic

harmonic analysis, evaluate alternative equipment and to quantify the expected results.

Upon completion of this course, participants should have a meaningful understanding of harmonic voltage and current distortion, the impact that harmonics can have on electric power systems, the typical causes, simple methods to analyze harmonic distortion and methods to minimize harmonics.

This course is applicable to electrical industry professionals serving either industrial or commercial environments. For maximum benefit of this course, participants should have an understanding of basic electrical principles such as Ohms law, power, electrical metering, motors, and general electrical equipment and systems and a working knowledge of basic algebra. (8 PDH)

Visit our for the next scheduled Harmonics Seminar. for more information.

Introduction
Reference materials
What is harmonic distortion?
Linear and non-linear loads
Voltage and current distortion
Harmonic spectrum
Total Harmonic Distortion

Causes of Harmonic Current Distortion
End-user equipment
AC to DC power conversion equipment
Block diagram for VFD or UPS
Types of Rectifiers
The sequence of harmonics by rectifier type
6-pulse rectifiers
Typical 6-pulse rectifier harmonics
Effect of source impedance on 6-pulse rectifier current distortion
12-pulse rectifiers
18-pulse rectifiers

Problems caused by harmonics
Wasted energy, increased current & kVA
Equipment failure, Increased operating temperatures
Effects of harmonics on transformers
Effects of harmonics on capacitors
Fuse blowing, C.B. tripping
Communications equipment interference
Harmonic resonance (series & parallel)
Harmonic voltage distortion
Harmonic voltage distortion analysis
SCR voltage notching
The remedy for SCR voltage notching

IEEE Std 519 – Limits for Harmonic distortion
Voltage distortion limits
Current distortion limits
IEEE 519 definitions
Applying IEEE Std. 519
Voltage notching limits
Telephone interference

Remedies for harmonic distortion
Passive, multi-pulse and active filter techniques
Line reactors
Predicting harmonic currents for 6-pulse rectifiers
Harmonic cancellation transformers
Tuned harmonic filters
General rules for tuned filters
Wideband hybrid harmonic filters
Multi-pulse rectifiers and harmonics
Active harmonic filters
VFD with active front end

Harmonics for single phase equipment
Typical 1-phase non-linear loads
1-phase rectifiers
Current waveforms
Typical harmonics and distortion
Unique problems with 3rd harmonic
Typical 1-phase remedies for harmonics

Wrap-up
Symptoms of harmonics
What to do if you suspect a harmonics problem
Avoiding harmonics problems

The Harmonics Seminar is approved by the State of Wisconsin for credential types:
Commercial Electrical Inspector Certification, Industrial Journeyman Electrician License, Journeyman Electrician License, Master Electrician License

Brought to you by Power Quality Specialists @ Allied Industrial Marketing, Inc.

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