#### Lesson 1 - Principles of Alternating Current

##### Topics:

AC and DC electricity; AC waveform; Peak-to-peak, average, effective values; Energy storage; Faraday's Law; Basic circuit concepts

##### Learning Objectives:

– State of definition of a waveform.– Demonstrate how to calculate the frequency of an alternator's output.

– Explain how to calculate an effective value.

– Name the kinds of values that must be used when applying the dc rules and laws to ac circuits.

#### Lesson 2 - Mathematics in AC Circuits

##### Topics:

Potential difference; Angles and degrees; Vectors applied to AC circuits; Graphic and math solutions; Calculating instantaneous values

##### Learning Objectives:

– Describe a triangle.– State the definition of a vector.

– Identify the vector representing resistance in a vector diagram.

– Demonstrate how to calculate the total impedance in an ac circuit.

####

Lesson 3 - Inductance and Inductive Reactance

##### Topics:

Factors affecting inductance; CEMF; Inductive reactance and time delay; Phase angles; Impedance; Mutual induction; Inductors

##### Learning Objectives:

– Name the property of a coil that makes it resist changes in current.– List the factors that determine inductance in a coil.

– State the definition of counter electromotive force.

– Demonstrate how to convert a frequency in Hz to a frequency in radians per second.

####

Lesson 4 - Capacitance and Capacitive Reactance

##### Topics:

How a capacitor works; Factors controlling capacitance; Kinds of capacitors; Time constants; Capacitive reactance; Phase angle

##### Learning Objectives:

– Name the parts of a capacitor.– List the factors that affect the amount of charge stored in a capacitor at a given potential difference.

– State the definition of capacitive reactance.

####

Lesson 5 - Impedance

##### Topics:

Impedance in series circuits; Phase angles; Resonance in series circuits; Impedance in parallel circuits

##### Learning Objectives:

– State the definition of impedance– Explain how to calculate the impedance in a series ac circuit.

– Demonstrate how to find the value of a phase angle for a circuit.

– Explain how to calculate the impedance in a parallel circuit.

####

Lesson 6 - Power and Energy in AC Circuits

##### Topics:

Work and energy; Power in resistive, inductive, and capacitive circuits; Power factor correction; Power capacitors; Capacitor installation

##### Learning Objectives:

– State the definition of power.– Demonstrate how to calculate power in an inductive circuit.

– State the reason why capacitors are added to circuits to increase the power factor.

– Explain how to install capacitors correctly.

####

Lesson 7 - Three-Phase Circuits

##### Topics:

Three-phase alternators; Y- and delta-connected alternators; Power in three-phase circuits; Load connections; Measuring power

##### Learning Objectives:

– List the main advantages of the three-phase ac system.– State the definition of phase sequence.

– Demonstrate how to calculate the RMS power in a single-phase circuit.

– Explain how to measure the total power consumed by the load in a three-phase circuit.

####

Lesson 8 - Principles of Transformers

##### Topics:

Magnetic field; No-load operation; Transformer construction, losses, and efficiency; Autotransformers; Instrument transformers

##### Learning Objectives:

– Explain the difference between the primary winding and the secondary winding in a transformer.– Explain how the windings are positioned in a core-type transformer.

– List the kinds of losses that occur in transformers.

– State the definition of a current transformer.

– List the functions of an instrument transformer.

####

Lesson 9 - Transformer Applications

##### Topics:

Transformer designation, insulation, cooling, and polarity; Single- and three-phase transformer connections; Installing transformers

##### Learning Objectives:

– Name general kinds of transformers.– List the temperature limits for each class of transformer insulation.

– Explain how oil-immersed transformers are cooled.

– Name the common methods of connecting three single-phase transformers for three-phase operation.

– Explain how to select the correct location for a transformer.

####

Lesson 10 - Maintaining Transformers

##### Topics:

Preventive maintenance; Inspection; Transformer liquids; Transformer failure; Testing; Disassembly and inspection

##### Learning Objectives:

– Explain what to look for during an inspection of sealed transformers.– List problems that are indicated by an increase in transformer operating temperature.

– Demonstrate how to perform a breakdown test.

– Explain how to locate the exact point of a leak in a welded joint below the liquid level.

– List the steps in inspecting a transformer when a winding fails.