Electrical Flashcards
The primary challenger electrical system is?
115 volt AC
A constant generator speed is ensured by the?
CSD
The number of AC generators is?
4
Emergency in-flight AC power is provided by?
ADG
The CSD oil quantity is checked by?
Viewing a sight glass
On the ground, AC power can be supplied by the engines or by a?
APU Generator
If the ADG is inadvertently deployed, it can be retracted?
Only on the ground
If the GEN 1/2 OVLD CAS message illuminates:
Generator load has exceeded 34.5kva
Primary DC power is supplied by:
TRU
What is the voltage of the AC electrical system?
115 volt
What is the voltage of the DC electrical system?
28 volt
What supplies the primary source of AC electrical power?
Engine-Driven Integrated Drive Generators (IDG’s)
What is the normal rating of each generator?
30 kilovolt-amperes to 35,000ft (25kva to 41,000ft)
The engine generator is tripped off and removed from the AC buses when?
Over/ under voltage
Over/ under frequency
Generator and bus over current
What is the rating of the APU generator?
30kva from sea level up to the APU’s maximum operating altitude of 20,000ft
The aircraft AC bus system consists of how many buses?
5
AC BUS 1
AC BUS 2
AC ESS BUS
AC UTILITY BUS 1
AC UTILITY BUS 2
The bus priority logic for AC BUS 1 and AC BUS 2 is?
On side engine driven generator
APU Generator
Cross side engine driven generator
External AC Power
The flight crew can manually inhibit the automatic bus transfer priority logic by pressing what?
AUTOXFER (eg. electrical smoke or fire)
The ADG provides power to what?
AC ESS BUS and 3B hydraulic pump
How much power does the ADG provide?
115 volt, 400hz, 15kva
Automatic deployment of the ADG occurs when?
Both AC BUS 1 and AC BUS 2 become unpowered
The aircraft is in flight
Cobham operate which ADG?
Dry ADG
Maintains a constant speed using a counterweight system
Deploys via a solenoid in the uplock system
No airspeed limitation
The DC electrical system is made up of what?
4 x TRU’s
2 x Nicad batteries
An external DC power receptacle
How many buses does the DC Electrical system consist of?
9
DC BUS 1
DC BUS 2
DC ESS BUS
DC EMER BUS
BATT BUS
DC UTIL BUS 1
DC UTIL BUS 2
Main battery direct bus
APU Battery direct bus
Each TRU is rated at?
100amps
The four TRU’s are identified as:
TRU 1
TRU 2
ESS TRU 1
ESS TRU 2
TRU 1 supplies what?
DC Bus 1 and DC UTIL BUS 1
TRU 2 supples what?
DC Bus 2 and DC UTIL BUS 2
ESS TRU 1 supplies what?
DC ESS BUS and DC BATT BUS
ESS TRU 2 supplies what?
DC ESS BUS and DC BATT BUS
If either TRU fails, both buses can be supplied by either TRU by selecting what?
MAIN BUS TIE switch/ light
If both ESS TRU’s fail in flight, what will power the DC ESS BUS?
APU BATT DIR BUS through the solid state contactor
The main battery is what voltage/amperage?
24 volt, 17 amp hour
The APU battery is what voltage/ amperage?
24 volt, 43 amp hour
How many circuit breaker panels are there?
5
CBP 1 controls?
AC BUS 1
BC BUS 1
BATT BUS
CBP 1 LOWER = EMERGENCY
CBP 3 contains what?
AC ESS BUS
IDG’s provide what output?
115v, 400hz, 3 phase
The generator is rated to what altitude?
30kva to 35,000, 25kva to 41,000
APU altitude rating?
30kva to 20,000ft
The generator trips when?
Over/ under voltage
Over/ under frequency
Generator and bus overcurrent
Bus priority logic?
Onside IDG
APU
Cross side IDG
External power
ADG provides what power output?
115 volt, 400hz, 15kva
The ADG powers what?
AC ESS BUS and 3B hydraulic pump
Each TRU provides?
100amps
Main battery?
24volt, 17amp/hr
APU battery?
24 volt, 43amp/hr
DC system is capable of charging batteries between what percentages?
30-100%
Ignition A is powered by
AC ESS BUS
Ignition B is powered by
DC BATT BUS
START is powered by
DC BATT BUS
Thrust reverser powered by
DC ESS BUS
L Oil pressure powered by
DC BATT BUS
R Oil pressure powered by
DC ESS BUS
PIlot’s PFD/MFD powered by
DC ESS BUS
Copilots PFD/MFD powered by
DC BUS 2
ADC 1 powered by
DC ESS BUS
ADC 2 powered by
DC BUS 2
IRS 1 powered by
DC BATT BUS AND AC ESS BUS
IRS 2 powered by
DC ESS BUS AND AC BUS 2
ATC 1 is powered by
DC ESS BUS
ATC 2 is powered by
DC BUS 2
FMS 1 powered by
DC BUS 1
FMS 2 powered by
DC BUS 2
GPS 1 powered by
DC BUS 1
GPS 2 powered by
DC BUS 2
Weather radar powered by
DC BUS 1
TCAS powered by
AC ESS BUS