Current Modules Measure Power Factor by Dataforth

The “power factor” of AC systems or components is thecosine of the angle by which the AC current leads or lagsthe applied AC excitation voltage....

11/17/2004


The “power factor” of AC systems or components is thecosine of the angle by which the AC current leads or lagsthe applied AC excitation voltage. The physics ofinductance and capacitance behavior establishes thevoltage-current relationship, which depends on both theAC excitation’s amplitude and time rate of change (i.e.derivative wrt time). This behavior causes a phase shiftphenomena between voltage and current, which increasesline losses, thereby increasing the supply line currentrequired to produce a given amount of useful outputpower. Utility companies often charge a penalty for acustomer’s unacceptable power factor. It is important forthe consumer of electrical energy to be aware of powerfactor and the available methods for correction.

Current Modules Measure Power Factor (3 page pdf)





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