Curbing Harmonics in HVAC Systems
A by-product of modern electronics is harmonic distortion. This occurs when uninterruptible power supplies, variable-frequency drives (VFDs) and other devices using solid-state power-switching supplies convert alternating-current (AC) power to direct-current (DC) power.
In HVAC systems, AC drives are the most prevalent source of harmonic distortion and result in wasted energy, even though additional current flows through electrical wires. High levels of harmonic distortion can lead to problems for distribution systems and the equipment they serve. These problems are similar to the effects of stress and high blood pressure on the human body and can range from unintended operation to power-system inefficiency to equipment shutdown.
An article in the July issue of HPAC Engineering entitled “Curbing Harmonics in HVAC Systems” outlines the negative impact of harmonic distortion as well as viable solutions. Written by Schneider Electric’s own harmonics expert, Harvey Eure, we encourage you to visit Schneider Electric's HVAC website to learn more about how we can help you make the most of your energy.
Product Focus: Altivar 61 Full-Featured AC Drives
The Altivar 61 AC drive defines ease of use for centrifugal pump and fan applications. It reduces installation cost, start-up time and harmonic distortion while providing reliable, worry free operation.
Learn more about the Altivar 61 VFD.
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