Harmonics http://ecmweb.com/taxonomy/term/6626/more en Wall-Mount Active Harmonic Filter http://ecmweb.com/harmonics/wall-mount-active-harmonic-filter <div class="node-body article-body">Schaefer Inc. has introduced the new PB-W (Wall-Mount) Series of three-wire and four-wire active (3x200VAC to 3x480VAC) harmonic filter modular systems that are designed to meet IEEE-519.</div> <div class="og_rss_groups"></div><p><a href="http://ecmweb.com/harmonics/wall-mount-active-harmonic-filter" target="_blank">read more</a></p> http://ecmweb.com/harmonics/wall-mount-active-harmonic-filter#comments Harmonics Tue, 13 May 2014 14:57:00 +0000 46031 at http://ecmweb.com Harmonic Filters for 690V Systems http://ecmweb.com/harmonics/harmonic-filters-690v-systems <div class="node-body article-body">The active harmonic filters ECOsine Active are now also available for 3-phase TN and IT 500V to 690V power grids. An increasing number of energy-efficient electrical consumers are used in industrial applications, including variable speed drives for motor control. These modern technologies contribute significantly to the reduction of electrical energy consumption; however, as an unwanted byproduct of their operation they can negatively affect the power quality.<br /> </div> <div class="og_rss_groups"></div><p><a href="http://ecmweb.com/harmonics/harmonic-filters-690v-systems" target="_blank">read more</a></p> http://ecmweb.com/harmonics/harmonic-filters-690v-systems#comments Harmonics Power Quality Tue, 13 May 2014 14:45:00 +0000 46021 at http://ecmweb.com When Circuit Boards are Toast, Part 14 http://ecmweb.com/harmonics/when-circuit-boards-are-toast-part-14 <div class="node-body article-body">Previously, you found your transformer had excess harmonics on the load side. The next step is to look at the primary side. The easiest place is probably at the panel supplying this transformer. That may be your service panel or a distribution panel ...</div> <div class="og_rss_groups"></div><p><a href="http://ecmweb.com/harmonics/when-circuit-boards-are-toast-part-14" target="_blank">read more</a></p> http://ecmweb.com/harmonics/when-circuit-boards-are-toast-part-14#comments archive Harmonics content Tue, 08 Nov 2011 16:21:00 +0000 5583 at http://ecmweb.com When Circuit Boards are Toast, Part 13 http://ecmweb.com/harmonics/when-circuit-boards-are-toast-part-13 <div class="node-body article-body">Previously, you found your transformer was overloaded. You moved enough loads to correct that, but you still have problems with circuit board failures. Will this nightmare ever end? Yes, but not before you know what's going on with harmonics in your ...</div> <div class="og_rss_groups"></div><p><a href="http://ecmweb.com/harmonics/when-circuit-boards-are-toast-part-13" target="_blank">read more</a></p> http://ecmweb.com/harmonics/when-circuit-boards-are-toast-part-13#comments archive Harmonics content Tue, 25 Oct 2011 18:01:00 +0000 5695 at http://ecmweb.com The 4-1-1 on Variable-Frequency Drives http://ecmweb.com/harmonics/4-1-1-variable-frequency-drives <div class="field-byline"> Rajan Battish, P.E., LEED AP, RTKL </div> <div class="field-deck"> Basic design and operation principles behind variable-frequency drives (VFDs) </div> <div class="node-body article-body">Basic design and operation principles behind variable-frequency drives (VFDs)</div> <div class="og_rss_groups"></div><p><a href="http://ecmweb.com/harmonics/4-1-1-variable-frequency-drives" target="_blank">read more</a></p> http://ecmweb.com/harmonics/4-1-1-variable-frequency-drives#comments Harmonics Ops & Maintenance Power Quality Tue, 24 May 2011 15:32:00 +0000 12677 at http://ecmweb.com