Electrical Flashcards
What is the acceptable GPU voltage range and amperage?
24-32 volts, 1500 amps
This range ensures proper operation of the ground power unit.
What does the AVAIL indication in the EXT PWR switch indicate?
The GPU is connected and meets the electrical quality criteria
This is confirmed when at least 5 volts is sensed.
How many circuit breaker (CB) panels are installed in the Challenger 300?
7 Total - 2 cockpit, 2 entryway, 1 galley, 2 in the aft equipment bay
The configuration may vary in different models.
How many circuit breaker (CB) panels are installed in the Challenger 350 (Early)?
8 Total - 2 cockpit, 2 entryway, 1 galley, 1 lav (behind mirror), 2 in the aft equipment bay
How many circuit breaker (CB) panels are installed in the Challenger 350 (Late)/3500?
9 Total - 2 cockpit, 2 entryway, 1 galley, 1 passenger closet back wall, 1 lav (behind mirror), 2 in the aft equipment bay
When do the generators automatically come online?
Automatically when engine is running after start except when a GPU is connected
When do generators come online if a GPU is connected and being used?
After deselecting the EXT PWR switch
What buses are powered when operating on a single generator on the ground?
All 6 (R&L essential, R&L main, R&L Aux)
What buses are powered when operating on a single generator in-flight?
4 (R&L essential, R&L main), AUX buses are load shed automatically
What buses will remain powered during loss of all generators in flight (Essential Power Only)?
Essential Buses and battery buses
Selecting the battery switch to the ON position connects the batteries to what buses?
Essential busses
What type of batteries does the CL-30 have and what are they rated at?
(2) 24 VDC NICAD, 44 amp/hour
Which battery powers the APU starter?
Right Battery, but can revert to Left if right battery is unavailable
Can all 3 generators power the aircraft simultaneously?
Yes, the Right and APU normally share the load of the right side system
When do the Emergency Lights come on automatically?
Right main bus failure
Where do we plug in a GPU?
On the lower right side of the fuselage, just below the engine pylon
Which battery is turned on first when powering up the aircraft?
Right battery - To prevent uncommanded APU starts
What is the minimum voltage requirement for the left battery prior to APU start?
_______
Specific voltage requirements are critical for safe APU operations.
Is there AC power available in the aircraft?
Yes. Passenger convenience items and cabin lighting through inverters.
What happens to auxiliary buses during single generator and Essential Power Only operations?
Aux buses are load shed automatically
What do the Left and Right AUX buses power?
Cabin AC and DC, Right side window, and foot warmers
What does the GND SERVICE PBA on the external power panel do?
Turns on cabin inverters to allow servicing to be done.
