# old lab 2 - ECE 3072 Lab 3 Page 1 of 8 ECE 3072 Lab 3...

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ECE 3072 Lab 3 Page 1 of 8 ECE 3072 Lab 3 Report Olivia Wasdin 6/13/13

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ECE 3072 Lab 3 Page 2 of 8 Lab 3 – AC Circuits and Electric Machines Procedure: Single Phase Voltage & Current Measurements: 1. Open LVDAM-EMS on the PC next to the Labvolt setup, and open the scope, phasor meter and harmonic analyzer utilities. 2. Connect circuit. Record voltage magnitude. The source voltage is not a pure sinusoid, and there are some harmonics of 60Hz present. Use the harmonic analyzer to record the magnitude of the 1 st through 13 th harmonics. V = 119.8 3. Turn on 300 Ohm resistor, record current magnitude and angle with phasor analyzer.
ECE 3072 Lab 3 Page 3 of 8 4. Connect 300 ohm resistor and 8.8uF capacitor in series, measure current magnitude and phase a. Print the voltage and current waveforms from the oscilloscope b. Calculate apparent power, real power, reactive power and power factor *See Table 1

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ECE 3072 Lab 3 Page 4 of 8 5. Connect circuit, measure current magnitude and angle. a. Print the voltage and current waveforms from the oscilloscope b. Does waveform look purely sinusoidal or is it distorted? If it has distortion, measure the magnitude of 1 st through 13 th harmonics. Now compare the harmonic currents of a purely capacitive load to those of a purely resistive load by re-connecting the circuit, and measuring the current harmonics. Note the difference in harmonic currents between cap and resistor and explain.
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