TERMINAL OBJECTIVE

AC MOTOR THEORY

• Figure 1    Three-Phase Stator
• Figure 2    Rotating Magnetic Field
• AC Motors
• Torque Production
• Torque Production
• Torque
• AC Motor Theory Summary

AC MOTOR TYPES

• Figure 5    Squirrel-Cage Induction Rotor
• Single-Phase AC Induction Motors
• Synchronous Motors
• Starting a Synchronous Motor
• Field Excitation
• AC Motor Types Summary

ELECTRICAL SCIENCE Module 13 Transformers

• TABLE OF CONTENTS
• LIST OF FIGURES
• LIST OF TABLES
• REFERENCES
• TERMINAL OBJECTIVE

TRANSFORMER THEORY

• Turns Ratio
• Theory of Operation
• Figure 1    Core-Type Transformer
• Voltage Ratio
• Voltage Ratio
• Current Ratio
• Three-Phase Transformer Connections
• Combinations of Delta and Wye Transformer Connections
• TABLE 1:   Voltage and Current Ratings of Transformers
• Transformer Losses and Efficiency
• Transformer Losses and Efficiency
• Transformer Operation Under No-Load
• Coil Polarity
• Figure 7    Polarity of Transformer Coils
• Transformer Theory Summary

TRANSFORMER TYPES

• Control Transformer
• Instrument Potential Transformer
• Transformer Types Summary

ELECTRICAL SCIENCE Module 14 Test Instruments & Measuring Devices

• TABLE OF CONTENTS
• TABLE OF CONTENTS (Cont.)
• LIST OF FIGURES
• REFERENCES
• TERMINAL OBJECTIVE

METER MOVEMENTS

• Electrodynamometer Movement
• Moving Iron Vane Movement
• Meter Movement Summary

VOLTMETERS

• Voltmeter
• Voltmeter
• Voltmeter
• Voltmeter Summary

AMMETERS

• Ammeter
• Ammeter
• Ammeter
• Ammeter Summary

OHM METERS

• Ohm Meter
• Ohm Meter
• Ohm Meter
• Ohm Meter Summary

WATTMETERS

• Three-Phase Wattmeter
• Wattmeter Summary

OTHER ELECTRICAL MEASURING DEVICES

• Power Factor Meter
• Figure 15    Simple Ohm Meter Ground Detector
• Synchroscope
• Measuring Devices Summary
• TEST EQUIPMENT
• Figure 17    Simple Megger Circuit Diagram
• Test Equipment Summary

ELECTRICAL SCIENCE Module 15 Electrical Distribution Systems

• TABLE OF CONTENTS
• TABLE OF CONTENTS (Cont.)
• LIST OF FIGURES
• REFERENCES
• TERMINAL OBJECTIVE
• ENABLING OBJECTIVES (Cont.)

SYSTEM COMPONENTS AND PROTECTION DEVICES

• Figure 1    One-Line Distribution Diagram
• Failure-Free Power
• Overlapping Protective Zones
• Fuses
• System Components and Protection Devices Summary

CIRCUIT BREAKERS

• Figure 5   Cutaway View of Molded Case Circuit Breaker
• Circuit Breakers
• Figure 6   Large Air Circuit Breaker
• High-Voltage Circuit Breakers
• Figure 7   Simple Circuit Breaker Control Circuit Breaker Open
• Figure 8   Simple Circuit Breaker Control Circuit Breaker Closed
• Circuit Breaker Summary

MOTOR CONTROLLERS

• Magnetic Controller
• Figure 10    Typical Three-Phase Magnetic Controller
• Motor Controller Types and Operation
• LVR Controller Operation
• Motor Controllers Summary

WIRING SCHEMES AND GROUNDING

• Terminology
• Figure 15    Three-Phase To Single-Phase Connections
• Three-Phase Wiring Schemes
• 4-Wire, Three-Phase Delta System
• Figure 18    4-Wire Delta System
• Summary
• Wiring Schemes And Grounding Summary
• CONCLUDING MATERIAL

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