1 / 20

Refer to figure.
GEN 1 suffers from a voltage overload and as a result the internal exciter breaker opens. The flight crew are instructed to switch off the generator using the overhead push button. The new configuration will be…

  • A
    Generator breaker 1 (C 1-1) opens and both bus-tie-breakers close.
  • B
    GEN 1 is disconnected from the constant speed drive unit (CSDU).
  • C
    AC BUS 1 is now fed directly from the ESS AC.
  • D
    TRU 1 is automatically taken offline due to the increased load on GEN 2.

Refer to figure.
A bus tie breaker is simply a device that connects two bus bars together. The BTB will allow them to operate simultaneously in parallel or to power the whole system only by one generator. In this question, GEN 1 fails, therefore the BTB C2.2 and C2.1 will close and let the current flow towards AC BUS 1 from GEN 2. This is one of the situations where the presented electrical system will be operated in parallel.

Your Notes (not visible to others)



This question has appeared on the real examination, you can find the related countries below.

  • Sweden
    2
  • Switzerland
    2
  • Greece
    1
  • Ireland
    1
Keyboard Shortcut Use Keyboard Shortcuts