Electrical Flashcards
R/TRU 1 belongs to which subsystem?
DC electrical subsystem
How many AC generators are in the AC electrical subsystem?
2
How many batteries (total) are in the Battery electrical subsystem?
2
How many PCUs are required for the AH-64E configuration?
1
Which components provide circuit protection, switching control logic, and secondary power distribution?
ELC 1 and 2
The Solid State Power Controllers are internal to the _______?
PDP (Power Distribution Point)
Under normal operations, which generator provides power to AC bus 1?
Generator 1
At an 80% charge, how long can the emergency battery supply power to IMC/IFR equipment?
30 minutes
What is the lowest temperature the internal primary battery heater will function at?
-40 degrees C
Where is the emergency battery located?
6L160, next to the IFF Transponder
Which CBP provides the emergency battery power for charging and heating?
4
Which generator fault condition includes the following criteria: Out < 100 VAC > 200 +/- 50 milliseconds?
Undervoltage
Which components drives the generators?
XMSN accessory gearbox
What are the two positions of the generator reset switches on the CHK OVSP TEST panel?
ON, OFF/RESET
Which R/TRU is located on the left side of the transmission bay?
R/TRU 1
What is the VDC output of the R/TRUs?
28 +/- 0.5
What temperature does the R/TRU thermal switch activate?
190 degrees F
What component reports the status of R345 triggering a EUFD message?
External Power Sensing Switch
What must be done to reset the External Power Contactor after an overcurrent condition?
MSTR IGN must be cycled to OFF
What is the corrective action for the EXT PWR DOOR OPEN advisory?
Close the external power door
What are the three steps for attempting to correct a single generator failure?
- Affected generator switch to OFF/RESET - Switch to ON
- Condition persists land as soon as practicable
Loss of MPDs indicated what failure condition?
Dual R/TRU Failure
Loss of MPDs indicates what failure condition?
Dual R/ TRU failure
