Transcription of Eliminating harmonics from the facility power …
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Eliminating harmonics from the facility power …
power system anomalies that peri-odically occur in a facility s elec-trical system can cause equipmentmalfunction, data distortion, transformerand motor insulation failure, overheatingof neutral buses, nusiance tripping of cir-cuit breakers, and solid-state componentbreakdown. The cost of power qualityproblems can be enormous. Equipmentreplacement can cost tens of thousandsof dollars. Downtime, however, can runin the millions of dollars. power quality problems take manyforms. Voltage sags, transients, and spikesare probably the most understood of theseforms. Harmonic distortion, though, canoccur from adjustable-frequency drivesand other non-sinusoidal loads typicallywhere ac/dc conversion is present.
Though harmonic analyzers provide an accurate and cost-effective means for de-termining the harmonic content on a sys-tem, they do not predict the effects of fu-
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