24 Electrical Power A321

Question 1

what primary method does A321 power generation use

Answer 1

primary ac power generation

Question 2

how is dc power supplied primarily

Answer 2

TR (transformer rectifiers)

Question 3

how many distribution networks are there and how are they connected

Answer 3

two main networks. Separate unless they are conneted due to external power, APU power, or one fails.

Question 4

what are the potential sources for power generation and when are they used

Answer 4

AC:
In flight: two main generators (IDGs) suppliing independent lines
If one main line is out: APU generator will supply to system
In total failure: most essential parts supplied by constant speed hydaulic motor powering a generator (CSM/G) which is powered by the blue hydraulic system using the RAT as the pressurizing pump.
Further emergency: from batteries via static invertor
On ground: external power.

DC:
In flight: TR off of each IDG
Emergency: batteries

Question 5

what is the battery used for?

Answer 5

• dc loads in case of emergencies
• ac loads in case of sever emergencies via static invertor
• starting APU in flight or on ground