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Course Description Presents the study of three-phase power systems, fundamentals of AC motor controls, and the basic transformer connections. Topics include: three-phase power systems, fundamentals of AC motor control, transformer connections (single-phase and three-phase step down), and introduction to low voltage systems. | Competency Areas | Hours | | Three-Phase Power Systems | Class | 4 | | Fundamentals of AC Motor Control | D. Lab | 0 | | Transformer Connections (Single-Phase and Three-Phase Step Down) | P. Lab/O.B.I. | 3 | | | Credit | 5 |
| Prerequisite: | ELT 107 | | Corequisite: | None | Course Guide | Competency | After completing this section, the student will: | | Three-Phase Power Systems | | Power systems | Recognize power systems with resistive, inductive, and capacitive loads. | | Power factors | Calculate power factors in power systems with resistive, inductive, and capacitive loads (reactance).
Balance the total load per phase (unity). | | Fundamentals Of AC Controls | | Fundamentals | Install toggle switch for a single-phase motor.
Install overload protection.
Connect a capacitor start motor.
Identify induction-type motors.
Install manual and magnetic starters.
Identify reversing drum controls.
List and identify limit switches, stop switches, and run switches.
Identify reversing control circuits.
Connect three-phase motors for low or high voltage. | | Transformer Connections (Single-Phase and Three-Phase Step Down) | | Connections | Determine Wye or Delta transformer connections.
Identify three-wire single-phase connections.
Connect wiring to low-voltage door chime system. |
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