Electrical System Flashcards
What are the DC power componenets
- Starter/generators
- Battery, relay, battery feeder protection
- External power receptacle and relay
- DC controls and indicators
What is the primary source of power for most aircraft operations
DC power
Generators supply primary ___DC power for the DC power system
28 VDV
Generators require ____%N2 to provide rated generator output
58%
What allows both generators to equally share the load
equalization circuit in the generator control unit (GCU)
What are the specifications of the aircraft battery
24 Volt, 40 amp-hour, lead acid battery
What are the uses of the aircraft battery
Secondary electrical power for
- Ground operations
- Engine Starting
- Emergency operations
What is required for the starter generators to provide the rated generator power output
58% N2
What is the DC standby power source
24 VDC lead acid battery
What does the AHRS battery power subsystem consist of
- 24 VDC lead acid AHRS auxiliary battery
- 2 AHRS battery test switches
- an annunciator
The AHRS battery is capable of providing 24 VDC to both AHRS computers for up to ______minutes
11
What is powered when the battery switch is in the EMER position
Emergency bus
Standby bus
Standby battery
If the inverter selector switch is in AUTO the #1 inverter provides power to ______buses and the #2 inverter provides power to ____buses
Primary, Secondary
What is on the Standby bus
Copilot instrument lights UFH Standby altimeter Standby attitude indicator Engine EFC start RTU 1 LH ITT
What are some key components on the EMERGENCY BUS
Emergency landing gear position
Emergency pitch trim
Copilot clock
(ADD MORE)
in case of total electrical failure the standby bus provides electrical power to the standby attitude indicator and other standby instruments for approximately _____minutes
30
What are the important components on the emergency bus?
Cabin smoke detector Select engine instruments (N1,N2) Landing gear position lights Emergency lights Emergency pitch trim VHF 1 Engine fire extinguishers Standby bus
What charges the standby battery?
The emergency bus
When operating under battery power only, placing the BATTERY switch to EMER will cause the battery to power what?
Emergency bus
Standby bus
Standby battery
Under what circumstances will you lose the AC bus shed?
No. 2 Inverter powering primary AC bus
No. 2 Inverter receiving DC power from the emergency bus
