• Home >
  • Power Quality & Reliability

    • 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

    Recent

    Photo 276235337 © Viktor Kintop | Dreamstime.com
    Utility Transformer
    Line reactors
    Examples Of Industrial Harmonic Filters (active And Passive)
    Infrared scanning for power quality problems
    Transformer
    MTE Corp.
    Matrix Air Ec Motor Filter
    Photo courtesy of AZZO
    Portable power quality monitoring

    Highlights

    © Farek | Dreamstime.com
    Dreamstime M 3950729

    Electrical Troubleshooting Quiz — Aug. 3, 2021

    Aug. 3, 2021
    How to address a scary power quality report
    © Artinun Prekmoung | Dreamstime.com
    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!
    Photo 150621333 © Artinun Prekmoung | Dreamstime.com
    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

    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

    Sept. 8, 2020
    Unless you have a harmonic issue, the electrical current usually leads the investigation to the source of the problem.

    Recommended

    Ecm 1500 595x335

    Download: Applying Effective Lighting and Control Solutions

    July 21, 2022
    From the EC&M e-books library: A compilation of technical articles from EC&M.
    Ecm March 2022 Aspire1
    Ecm Members Header 122220
    VCTStyle/iStock/Thinkstock
    Mro Quiz 8 18 20
    © Benjawan Sittidech | Dreamstime.com
    Frustrated Engineer
    anyaberkut/iStock/Getty Images Plus
    Mro Electrical Quiz 08 04 20
    Fused Exo Pic 02
    gustavofrazao/iStock/Getty Images Plus
    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
    © Catalin205 | Dreamstime.com
    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

    How Are Your Harmonics?

    Nov. 7, 2016
    A good harmonic analyzer will show you graphically the breakdown of your component harmonics.
    Ecmweb 8077 595 Pqnfig1 0128

    How to Reduce Energy Waste Before You Spend Money on an Audit

    March 3, 2016
    You don't have to wait for an audit to identify ways to cut energy costs