Electrical Power Systems Technology

402 Electrical Power Systems Technology

Figure V. Electrical power systems model

Power Control (Chapter 15)
Operational Power Control Systems (Chapter 16)
Control Devices (Chapter 17)

Limit Switch
Temperature Switch
Float Switch
Pressure Switch
Foot Switch
Drum Controller

5. Describe indicating lights used with electrical power control.


6. Recognize and describe various motor starting systems.


7. List the functions of motor starters.


8. Describe the method of assigning size ratings for motor
   contactors.


9. Describe bimetallic and melting alloy thermal overload devices
   and their current ratings.


10. Describe the classification system used for motor starters.


11. Describe the method of assigning sizes to manual starters.


12. Describe a combination starter.


13. List criteria used to select motor controllers.


14. List types of motor controller enclosures used by NEMA.


15. Explain the operation of a relay.


16. Explain the operation of a solenoid.


17. Describe an SCR, triac, and diac control devices that may be used
    for electrical power control.


18. Explain the use of programmable logic controllers and other
    computerized controllers used for electrical power control
    applications.


19. Explain the operation of the following power control circuits:
    Start-Stop Control
    Start-Stop Control from Multiple Locations