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LCS Electricity Exam

  1. Elements required to produce electricity
    • Magnetic Field
    • Conductor
    • [Rotating] Field
    • aka "Mama's Fried Chicken"
  2. Rotor consists of
    windings in a core, mounted on a steel shaft
  3. Purpose of generator space heater
    • Prevents condensation inside the generator
    • Energized any time circuit breaker to generator is open
  4. Vital vs Non-Vital SSDG
    • Vital Air Flask
    • Enclosure
    • Shock Mounts
    • Plate-Type vs Tube-Type Cooling
    • (2x) Fuel Oil Service Tanks
  5. MTU 396 Acronym Breakdown
    • MTU = Motor Turbine Union
    • 8 = 8 Cylinder
    • V = Block Design
    • 396 = Engine Series
  6. TE54 Acronym Breakdown
    • T= Turbo Charging Exhaust
    • E = Charge Air Cooling
    • 5 = Marine Engine
    • 4 = Design Index
  7. ABT Panel Characteristics
    • Power-Seeking
    • Shifts power source below 310 VAC
    • Can shift power source back above 386 VAC
  8. Air Cooled Solid State Converter
    • Supplies power to mission bay power panel #2
    • Mission bay power panel #2 powers CISP
  9. Air Cooled Solid State Converter: Power Sources provided
    • 115 VAC, 3-Phase 400Hz
    • 200 VAC, 3-Phase 400Hz
  10. 120 VAC Usage
    Transmits power to equipment via step-down transformers
  11. 2 kinds of transformers onboard LCS-2
    • Delta-Delta
    • Delta-Wye
    • Delta-Wye is grounded; used in ship's lighting
  12. How many fuse-type vital distribution panels are there?
    45
  13. How many DAU's have no-break power?
    19
  14. Where is the DSLC located?
    On switchboard at Unit 2
  15. Frequency Converter
    • Converts 450 VAC -> 315 VDC (& 315 VAC)
    • Steps down 450 VAC to 220 VAC
    • Supplies voltage to 7 cooling fans
  16. SSDG Auto-shutdown thresholds (Warning/Shutdown)
    • Air Cooler: 60C/70C
    • High Rotor Bearing Temp: 85C/95C
    • High Stator Temp: 155C/165C
    • Low L/O Pressure: 4Bar/4.5Bar
    • Low F/O Pressure: 2.5 Bar
  17. How many power-seeking ABT's are onboard?
    9
  18. What feeds lighting?
    450V/60Hz (through stepdown transformers)
  19. 24V DC is for
    DC/Emergency/Batteries
  20. 400Hz goes to
    Panels (Vital/Essential)
  21. Gen Circuit Breaker & SP Breaker Trip
    315 VAC
  22. SSDG Start Air Pressure
    38 BAR
  23. Receiver stores x attempts of start air for SSDG's
    10
  24. Places to control/monitor equipment:
    • DCLOP
    • MFC
    • PPCU
    • ECS
  25. Places to control/monitor SSDG
    • SFCS
    • LOP
    • Locally @ SWBD
  26. DAU High-Battery Alarm
    32V
  27. Freq Converter Overload Rating
    150% / 30 secs
  28. How many Vital DC Power Panel (VDCPP) are there?
    14
  29. Function of PMG
    • Functions as a pilot exciter
    • Provides the initial power necessary to flash the field of the exciter and begin the electrical generation process.
  30. Bus Tie Breaker Amperage
    1225 amp
  31. Shore Power Receiver Breaker
    410 amp
  32. Generator Breaker Amperage
    1475 amp
  33. Shore Power Breaker Amperage
    1600 amp
Author
bbetanco
ID
330119
Card Set
LCS Electricity Exam
Description
LCS Propulsion Exam for Electricity and electrical things
Updated

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