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Copyright © by NCCER,Published by Pearson Education, Inc.
Electrical Level Two – Alternating CurrentModule 26201-11
National Center for Construction Education and
Research
Slide 1
Alternating CurrentModule 26201-11
Copyright © by NCCER,Published by Pearson Education, Inc.
Electrical Level Two – Alternating CurrentModule 26201-11
National Center for Construction Education and
Research
Slide 2
Upon completion of this module, you will be able to do the following:
1. Calculate the peak and effective voltage or current values for an AC waveform.
2. Calculate the phase relationship between two AC waveforms.3. Describe the voltage and current phase relationship in a resistive AC circuit.4. Describe the voltage and current transients that occur in an inductive circuit.5. Define inductive reactance and state how it is affected by frequency.6. Describe the voltage and current transients that occur in a capacitive circuit.7. Define capacitive reactance and state how it is affected by frequency.8. Explain the relationship between voltage and current in the following types of
AC circuits: • RL circuit • RC circuit • LC circuit • RLC circuit9. Explain the following terms as they relate to AC circuits: • True power • Apparent power • Reactive power • Power factor10. Explain basic transformer action.
Objectives
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Electrical Level Two – Alternating CurrentModule 26201-11
National Center for Construction Education and
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Slide 3 Figure 1 – Conductor moving across a magnetic field
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Electrical Level Two – Alternating CurrentModule 26201-11
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Slide 4 Figure 2 – Angle versus rate of cutting lines of flux
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Electrical Level Two – Alternating CurrentModule 26201-11
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Slide 5 Figure 3 – One cycle of alternating voltage
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Electrical Level Two – Alternating CurrentModule 26201-11
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Slide 6 Figure 4 – Frequency measurement
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Electrical Level Two – Alternating CurrentModule 26201-11
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Slide 7 Figure 5 – Amplitude values for a sine wave
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Electrical Level Two – Alternating CurrentModule 26201-11
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Slide 8 Figure 6 – Voltage waveforms 90° out of phase
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Electrical Level Two – Alternating CurrentModule 26201-11
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Slide 9 Figure 7 – Waves in phase
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Electrical Level Two – Alternating CurrentModule 26201-11
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Slide 10 Figure 8 – AC waveforms
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Electrical Level Two – Alternating CurrentModule 26201-11
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Slide 11 Figure 9 – Resistive AC circuit
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Electrical Level Two – Alternating CurrentModule 26201-11
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Slide 12 Figure 10 – Voltage and current in a resistive AC circuit
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Electrical Level Two – Alternating CurrentModule 26201-11
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Slide 13 Figure 11 – Factors affecting the inductance of a coil
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Electrical Level Two – Alternating CurrentModule 26201-11
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Slide 14 Figure 12 – Inductor voltage and current relationship
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Electrical Level Two – Alternating CurrentModule 26201-11
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Slide 15 Figure 13 – Capacitors
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Electrical Level Two – Alternating CurrentModule 26201-11
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Slide 16 Figure 14 – Charging and discharging a capacitor
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Electrical Level Two – Alternating CurrentModule 26201-11
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Slide 17 Figure 15 – Capacitors in parallel
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Electrical Level Two – Alternating CurrentModule 26201-11
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Slide 18 Figure 16 – Capacitors in series
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Electrical Level Two – Alternating CurrentModule 26201-11
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Slide 19 Figure 17 – Voltage and current in a capacitive AC circuit
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Electrical Level Two – Alternating CurrentModule 26201-11
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Slide 20 Figure 18 – Summary of AC circuit phase relationships
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Electrical Level Two – Alternating CurrentModule 26201-11
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Slide 21 Figure 19 – Series RL circuit and vector diagram
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Electrical Level Two – Alternating CurrentModule 26201-11
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Slide 22 Figure 20 – Series RL circuit with waveforms and vector diagram
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Electrical Level Two – Alternating CurrentModule 26201-11
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Slide 23 Table 1 – Series R and XL Combinations
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Electrical Level Two – Alternating CurrentModule 26201-11
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Slide 24 Figure 21 – Parallel RL circuit with waveforms and vector diagram
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Electrical Level Two – Alternating CurrentModule 26201-11
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Slide 25 Table 2 – Parallel R and XL Combinations
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Electrical Level Two – Alternating CurrentModule 26201-11
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Slide 26 Figure 22 – Series RC circuit with vector diagrams
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Electrical Level Two – Alternating CurrentModule 26201-11
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Slide 27 Table 3 – Series R and XC Combinations
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Electrical Level Two – Alternating CurrentModule 26201-11
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Slide 28 Figure 23 – Parallel RC circuit with vector diagrams
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Electrical Level Two – Alternating CurrentModule 26201-11
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Slide 29 Table 4 – Parallel R and XC Combinations
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Electrical Level Two – Alternating CurrentModule 26201-11
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Slide 30 Figure 24 – Series LC circuit with vector diagram
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Electrical Level Two – Alternating CurrentModule 26201-11
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Slide 31 Figure 25 – Parallel LC circuit with vector diagram
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Electrical Level Two – Alternating CurrentModule 26201-11
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Slide 32 Figure 26 – Series RLC circuit and vector diagram
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Electrical Level Two – Alternating CurrentModule 26201-11
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Slide 33 Figure 27 – Parallel RLC circuit and vector diagram
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Electrical Level Two – Alternating CurrentModule 26201-11
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Slide 34 Figure 28 – Power calculations in an AC circuit
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Electrical Level Two – Alternating CurrentModule 26201-11
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Slide 35 Figure 29 – RLC circuit calculation
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Electrical Level Two – Alternating CurrentModule 26201-11
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Slide 36 Figure 30 – Power triangle
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Electrical Level Two – Alternating CurrentModule 26201-11
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Slide 37 Figure 31 – Basic components of a transformer
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Electrical Level Two – Alternating CurrentModule 26201-11
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Slide 38 Figure 32 – Transformer action
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Electrical Level Two – Alternating CurrentModule 26201-11
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Slide 39 Figure 33 – Steel laminated core
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Electrical Level Two – Alternating CurrentModule 26201-11
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Slide 40 Figure 34 – Cutaway view of a transformer core
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Electrical Level Two – Alternating CurrentModule 26201-11
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Slide 41 Figure 35 – Transformer winding polarity
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Electrical Level Two – Alternating CurrentModule 26201-11
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Slide 42 Figure 36 – Transformer turns ratio
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Electrical Level Two – Alternating CurrentModule 26201-11
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Slide 43 Figure 37 – Tapped transformers
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Electrical Level Two – Alternating CurrentModule 26201-11
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Slide 44 Figure 38 – Importance of an isolation transformer
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Electrical Level Two – Alternating CurrentModule 26201-11
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Slide 45 Figure 39 – Autotransformer schematic diagram
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Electrical Level Two – Alternating CurrentModule 26201-11
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Slide 46 Figure 40 – Current transformer schematic diagram
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Electrical Level Two – Alternating CurrentModule 26201-11
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Slide 47 Figure 41 – Potential transformer.
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Electrical Level Two – Alternating CurrentModule 26201-11
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Slide 48
Supplemental Art
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Electrical Level Two – Alternating CurrentModule 26201-11
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Slide 49 Course Map
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Electrical Level Two – Alternating CurrentModule 26201-11
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Slide 50 Left-Hand Rule for Generators
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Electrical Level Two – Alternating CurrentModule 26201-11
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Slide 51 RMS Amplitude
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Electrical Level Two – Alternating CurrentModule 26201-11
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Slide 52 What’s Wrong With This Picture?
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Electrical Level Two – Alternating CurrentModule 26201-11
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Slide 53 AC Circuits
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Electrical Level Two – Alternating CurrentModule 26201-11
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Slide 54 Turns and Voltage Ratios
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Electrical Level Two – Alternating CurrentModule 26201-11
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Slide 55
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