Basic AC PowerOBJECTIVESTERMINAL OBJECTIVE1.0 Given an AC single-phase or three-phase circuit, DESCRIBE the power characteristicsin the circuit.ENABLING OBJECTIVES1.1DESCRIBE the relationship between apparent, true, and reactive power by definitionor by using a power triangle.1.2DEFINE power factor as it relates to true power and apparent power.1.3 Given the necessary values for voltage (E), resistance (R), reactance (X), impedance(Z), and/or current (I), CALCULATE the following power components for an ACcircuit:a. True power (P)b. Apparent power (S)c. Reactive power (Q)d. Power factor (pf)1.4DEFINE the following terms:a. Leading power factorb. Lagging power factor1.5STATE the reasons that three-phase power systems are used in the industry.1.6 Given values for current, voltage, and power factor in a three-phase system,CALCULATE the following:a. Real powerb. Reactive powerc. Apparent power1.7 Given a diagram of a wye- or delta-connected three-phase system, DESCRIBE thevoltage/current relationships of the circuit.1.8STATE the indications of an unbalanced load in a three-phase power system.Rev. 0 Page v ES-09

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