BD700 Electrical Flashcards
What are the sources of airplane generated AC power?
Four 40 kVA engine driven generators
One 40 kVA APU generator
Ram air turbine
How many AC buses does the AC electrical system have?
Eight total
Four primary buses - 1, 2, 3, 4
Four secondary buses - 1A, 2A, 3A, ESS
What is the purpose of the AC power center (ACPC)?
Protects, controls and distributes AC power to the main AC buses
In the advent of single generator operation, which AC Buses are automatically shed?
AC Buses 2 and 3
This results in AC buses 2A and 3A also being shed
What does a EXT AC “AVAIL” light on the electrical panel indicate?
External AC power is connected and is the correct phase, voltage and frequency
What does a GEN “FAIL” light on the electrical panel indicate?
Failed generating channel
or
Fire discharge handle is pulled
What is the primary / alternate power priority for the ESS AC Bus?
RAT Generator (if deployed) Gen 4 via AC ESS Bus Gen 1 via AC Bus 1A Gen 2 via AC Bus 2A Gen 3 via AC Bus 3A APU Gen
What are the 6 primary DC power sources?
TRU 1, TRU 2, ESS TRU 1, ESS TRU 2
Avionics Battery
APU Battery
What are the 4 main DC buses?
DC Bus 1 and 2
DC ESS Bus
BATT Bus
How long will the aircraft main batteries last as the sole source of power?
Minimum of 15 minutes
What is the primary / alternate power priority for the DC ESS bus?
ESS TRU 1
ESS TRU 2
TRU 2
TRU 1
Which DC Buses are automatically shed during single TRU operation?
DC Bus 1 and DC Bus 2
What is the purpose of the DC POWER EMERGENCY OVERRIDE switch?
During loss of all DC power
Allows ESS TRU 1 and 2 to bypass the DCPC and power the SPDA’s directly
Can the pilot change a thermal circuit breaker from the CDU?
No, the affected circuit breaker can only be manually reset at its location
