Harmonics

Understanding why current and voltage deviate from a pure sinewave, how it affects electrical systems, and best practices for dealing with the non-linear loads that cause them

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Utility Transformer
Utility Transformer
Utility Transformer
Utility Transformer
Utility Transformer

Highlights

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Portable power quality monitoring
Portable power quality monitoring
Portable power quality monitoring
Portable power quality monitoring
Portable power quality monitoring

The Top 5 Myths About Portable Metering

Feb. 7, 2022
Dispelling common misconceptions regarding the selection and application of portable metering
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Dreamstime M 3950729
Dreamstime M 3950729
Dreamstime M 3950729
Dreamstime M 3950729
Dreamstime M 3950729

Electrical Troubleshooting Quiz — Aug. 3, 2021

Aug. 3, 2021
How to address a scary power quality report
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Ups For March 2021 Monthly Quiz
Ups For March 2021 Monthly Quiz
Ups For March 2021 Monthly Quiz
Ups For March 2021 Monthly Quiz
Ups For March 2021 Monthly Quiz

ECM’s Monthly Quiz: Power Quality Puzzles

March 2, 2021
Take this quiz to see how much you know about power quality, and enter for a chance to win a $25 gift card to Amazon, Cabela's, or iTunes!
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Uninterruptible Power Supply Dreamstime Xxl 150621333
Uninterruptible Power Supply Dreamstime Xxl 150621333
Uninterruptible Power Supply Dreamstime Xxl 150621333
Uninterruptible Power Supply Dreamstime Xxl 150621333
Uninterruptible Power Supply Dreamstime Xxl 150621333

Check That UPS

Oct. 13, 2020
These systems store energy, typically in a battery, and then release that energy when needed.
Harmonic Thd Graph
Harmonic Thd Graph
Harmonic Thd Graph
Harmonic Thd Graph
Harmonic Thd Graph

Where Is That Harmonic Source?

Sept. 22, 2020
Electrical current can point to a device that’s causing problems on a power system, but this isn’t always the case when there’s a harmonics issue.
Follow The Current Pq Newsbeat
Follow The Current Pq Newsbeat
Follow The Current Pq Newsbeat
Follow The Current Pq Newsbeat
Follow The Current Pq Newsbeat

Follow the Current

Sept. 8, 2020
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Mro Quiz 8 18 20
Mro Quiz 8 18 20
Mro Quiz 8 18 20
Mro Quiz 8 18 20
Mro Quiz 8 18 20
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Frustrated Engineer
Frustrated Engineer
Frustrated Engineer
Frustrated Engineer
Frustrated Engineer
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Mro Electrical Quiz 08 04 20
Mro Electrical Quiz 08 04 20
Mro Electrical Quiz 08 04 20
Mro Electrical Quiz 08 04 20
Mro Electrical Quiz 08 04 20
Fused Exo Pic 02
Fused Exo Pic 02
Fused Exo Pic 02
Fused Exo Pic 02
Fused Exo Pic 02

The Case of the Chiller Fuse Failures

July 14, 2020
How one university solved the mystery of fuse failures on a large chiller
gustavofrazao/iStock/Getty Images Plus
Quiz On Wooden Blocks
Quiz On Wooden Blocks
Quiz On Wooden Blocks
Quiz On Wooden Blocks
Quiz On Wooden Blocks

Electrical Troubleshooting Quiz — July 7, 2020

July 7, 2020
What to do when a custom-built production machine with recycled parts keeps breaking down
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Solar Panel Catalin205 Dreamstime 57353966
Solar Panel Catalin205 Dreamstime 57353966
Solar Panel Catalin205 Dreamstime 57353966
Solar Panel Catalin205 Dreamstime 57353966
Solar Panel Catalin205 Dreamstime 57353966

Delinquent ASD Causes Havoc on PV System

May 26, 2020
Unusual fault code leads to the true culprit of a power quality dilemma
Ecmweb 8622 595ecmchart
Ecmweb 8622 595ecmchart
Ecmweb 8622 595ecmchart
Ecmweb 8622 595ecmchart
Ecmweb 8622 595ecmchart

How Are Your Harmonics?

Nov. 7, 2016
A good harmonic analyzer will show you graphically the breakdown of your component harmonics.