Electrical Flashcards
How many Batteries are required to power the ships electrical system?
(Minimum voltage?)
Just one Battery with a minimum of 16v to energize online
Which power source takes precedence
(Main Batteries/APU/GPU)??
GPU is Master with other power sources running (No Amps) (28V)
What is the GPU over volt cut out?
Volts/amps?
GPU will cut out or not come online with any of these conditions present.
>33V
<500amps
>1500amps
What does the GCU prevent from coming online until you disconnect the GPU?
The Ships Generators
What value does the APU share the load with the ships Generators?
1/3 of the total load between Left/Right Generator and APU
At what N2 Value will the GCU open the starter relay??
@40% N2, starter relay opens and light extinguishes
ELEC PWR annunciator light comes on
What QRH page?
(VAC, VDC, AMP Limits?)
Amber Tab 5
VAC range (110-130)
VDC range (22V-29.5V)
AMPs (0-325)(within 40 Amps/L,R)
EMER BAT 1 or 2 annunciation light comes on, what happened?
Either or both batteries are not receiving trickle charge.
What does EMER BAT 1 power?
Both N1’s
Mag compass
3 Stand by instruments
What does EMER BAT 2 power?
Gear indicator lights
ADC 1&2/AHRS 1&2 (For initial bit checks)/(For 11min after full electrical failure)
Certain tails (RTUI/COM1/NAV1/CDUI)
What hot items are on BATT 1
Tail-cone inspection mx light
Toilet service recepticle
What hot items are on BAT 2
Cabin Entry light Cockpit dome light Aft cabin bag light Tail cone bag light SPPR system
How do you know if you lost DC1 Bus?
N2 and ITT on left or right
How do you know if you lost DC2 bus?
Loss of fuel flow gauge left or right
How do you know if you lost DC3 bus?
Oil gauges will drop to zero left or right
If one of your DC buses fails, can you reset the circuit breaker or would you bus tie?
Neither, leave it alone, go land and defer to MX
Where are the inverters and current limiters located?
In Tail-cone baggage compartment
How long will you have power provided BATT&EMER batteries are fully charged?
Approximately 1 hour
What indication would there be if you lost a current limiter? What about both?
AMP load will be lower than other side
If both, Amps will be low and VDC will show 24V.
What items are located on the Left AC BUS
L Windshield Defog
Mach Trim
GPWS
What items are on the R AC Bus?
R Windshield Defog
Spoilerons
Nose steering
Nose Fan (ground)
What would you do if one of your Inverters failed
Turn off failed Inverter
AC Bus tie
Other side will automatically give Windshield defog
Which items automatically load shed when losing an engine or generator??
(3 hot, 1 cold)
Cabin Power
Cockpit floor heat
Baggage heat
Freon Air conditioner system
What bus does the cabin power come from?
Directly from Battery charging Bus
