Electrics Flashcards
(15 cards)
What are the indications of a double generator failure?
DC GEN 1, DC GEN 2, DC dual
What are the actions following a battery hot light?
Switch off both batteries
What is the function of the auxiliary bus?
Load sheds to the auxiliary bus from the main bus
Where should the generator switches be left?
On at all times, except failure conditions
Can the generator be connected in parallel with the batteries and the GPU?
Only the batteries
How many gauges are there to read the voltage for GEN 1, GEN 2, battery and the APU?
One
What action should be taken if the aircraft cannot immediately be returned to the departure airfield if the engines have been started by the batteries only?
Charge batteries for five minutes before takeoff
What are the generator ratings?
28.5 V 300 A 9 kW
What is the rating of the GPU?
28.5 V, cut off above 29.5 V, 1000 A if required for engine starting
What does a battery warning light indicate?
Battery relay open, loss of one or both batteries from the bus
What are the battery ratings?
24 to 26 V at 40 AH
What circuits are powered from the battery bus (with the auxiliary bus switch on)?
Fire extinguishers, pressure refuelling relay control, dome lights, rear compartment lights, battery control, and cargo door (freight door aircraft only).
Can the generator voltage be red with the generator not connected to the main bus?
Yes
Which circuits that are connected to the battery bus are inoperative with the auxiliary bus turned off?
Cockpit dome lights and rear compartment light
What does the DC emergency switch do?
Select batteries off and disconnect priority bus from main bus and reconnect it to GEN 2
