021 - Airframe, Systems, Electrics, Power Plant CPL (A)

1 / 20

Refer to figure.
In case of failure of the static inverter: (NB: all contactors not mentioned are assumed to remain open)

A
AC ESS BUS can be powered, if required, by the EMER GEN if C4.1 is closed.
B
AC can be generated by the batteries using the ESS TRU, provided the appropriate contactors are closed.
C
AC ESS BUS can be fed by DC ESS BUS.
D
DC ESS BUS will not be powered, even if GEN 1 and 2 are supplying AC and the appropriate contactors are closed.

Refer to figure.
If the static inverter fails (DC to AC), the AC ESS BUS can be powered by the EMER GEN if contactor C4.1 is closed.

Your Notes (not visible to others)

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