But when reactance exists, the apparent power is greater than the true power. When the impedance is a pure resistance, the apparent power is the same as the true power. In an AC circuit, the product of the rms voltage and the rms current is called apparent power. This complicates the determination of power. But in an AC circuit whose impedance consists of reactance as well as resistance, the voltage and current are not in phase. P is the power in watts, Erms is the root-mean-square (rms) voltage in volts, and Irms is the rms current in amperes. In a direct current (DC) circuit, or in an AC circuit whose impedance is a pure resistance, the voltage and current are in phase.
Ground Continuity, Polarization, and Ground Bond TestsĪpparent power is a measure of alternating current (AC) power that is computed by multiplying the root-mean-square (rms) current by the root-mean-square voltage.16CH Battery Cell Simulator Model - 87001.Battery Cell Surge Tester Model - 19311.Guardian Hipot Tester AC/DC/IR/SCAN - 19050.Hybrid Wound Component EST Scanner - 19035.Guardian Electrical Safety Analyzer - 19032.Guardian Multi-Channel Hipot Tester - 19020.
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