Electronic System Flashcards
What does it mean when the Generator 2 light is on?
It’s not powering Bus A
What does it mean when generator 4 light is on?
It’s broken
When will TR (Transformer Rectifier) light come on?
150 Degrees Celsius
Where does the generator get its cooling air from?
Generator cooling door in the oil cooling intake.
What is the power priority for
Flight Ess AC Bus?
Generator 2, Feeder 4, Generator 3,
Bus A
What is the out out of the PMG (Permanent Magnet Generator)?
39 volts, single phase, 600 HZ
What will cause the APU to shut down?
Fire “over 400 Degrees Celsius”
Low oil pressure
RPM over speed “over 106%”
APU max EGT for 10 seconds?
710 degrees Celsius
APU over speed RPM?
Above 106%
APU max cont EGT?
649 degrees celsius
The generator supply’s the aircraft with?
120 volts AC
3 phase
400 HZ
60 KVA with out cooling
90 KVA with cooling
APU RPM on deck?
98-102%
What does the inverter produce?
120 volts AC, single phase, 400HZ
Powers start AC
What does the TR (Transformer Rectifier) do?
Takes 120 volts AC transforms it to 28 volts AC then rectifies it to 28 volts DC.
APU RPM in-flight?
98-103%
