Transcription of POWER QUALITY STANDARDS - powermonitoring.com
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POWER QUALITY STANDARDS - powermonitoring.com
POWER QUALITY STANDARDSMark McGranaghanElectrotek Concepts, Contractor MagazinePower QUALITY for the Electrical Contractor CourseIntroductionPower QUALITY has always been important. However, for many years the equation definingpower QUALITY was very simple: POWER QUALITY = RELIABILITYC ustomer loads were linear in nature. When a sinusoidal voltage was supplied to them,they drew a sinusoidal current. They typically fell into the categories of lighting, heating,and motors. In general, they were not very sensitive to momentary variations in the supplyvoltage, such as transients and voltage sags. The loads were not connected together innetworks so grounding issues other than safety were not very major changes in the characteristics of customer loads and systems have completelychanged the nature of the POWER QUALITY first is the sensitivity of the loads themselves. The devices and equipmentbeing applied in industrial and commercial facilities are more sensitive to powerquality variations than equipment applied in the past.
POWER QUALITY STANDARDS Mark McGranaghan Electrotek Concepts, Inc. Electrical Contractor Magazine Power Quality for the Electrical Contractor Course
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