Electrical Flashcards
What supplies power to the DC system?
- 4 engine-driven generators (28 VDC, 400 amps)
- 1 APU starter generator (28 VDC, 400 amps)
- 2 NiCad batteries (24 VDC, 44 AH)
- 1 lead-acid backup battery (24 VDC, 5 AH)
- Available for ground servicing: 1 GPU (28 VDC, 1,600 amps)
Into how many networks is the electrical system divided during normal operations?
Two
What provides system management and protection for the electrical system?
Electronic distribution logic and generator control units
When a GPU is connected, can the APU be used for electrical power?
The GPU has a priority over all other systems
Can a GPU be used to charge the batteries?
No
Which generators supply the left electrical network?
1 and 3
To which generator is the APU normally connected in parallel?
2 and 4
What is the voltage and amperage of the NiCad main batteries?
24V 44 amp
To which bus are the generators connected to charge the No. 1 battery during normal flight?
DC bus 1
Which battery provides electrical power for APU starting?
No. 2
When on the ground with the batteries as the only electrical power source, which buses are de-energized?
The shed buses
During APU starting, which battery is isolated from the load buses?
No. 1
