CH05 A320 Electrical Flashcards
ELEC_002
What are the power sources for the AC Buses during normal operating conditions for
AC Buses 1 & 2?
▪ _____ _____ Generator (___ 1 or 2).
▪ ______ power
▪ ______ generator
▪ Respective Engine Generator (IDG 1 or 2).
▪ External power
▪ APU generator
ELEC_002
What are the power sources for the AC Buses during normal operating conditions for the
AC ESS Bus?
▪ _____ by AC Bus __
▪ __ __ __ manually, when ___ ___ ___ pb is selected to ____
▪ ___ ____ __ automatically, via the ___ switching logic
ELEC_002
What are the power sources for the AC Buses during normal operating conditions for the
AC ESS Bus?
▪ Normally by AC Bus 1
▪ AC Bus 2 manually, when AC ESS FEED pb is selected to ALTN
▪ AC Bus 2 automatically, via the auto switching logic
ELEC_003
Describe the electrical system’s power priority?
1st Respective ______ ______
2nd _____ power (If selected ___)
3rd ____ generator
4th _____ engine generator
ELEC_003
Describe the electrical system’s power priority?
1st Respective engine generator
2nd External power (If selected ON)
3rd APU generator
4th Opposite engine generator
ELEC_004
Recall the functions of the BUS TIE pb when selected to AUTO?
AUTO (____ ____) – Power priority order logic is ______.
ELEC_004
Recall the functions of the BUS TIE pb when selected to AUTO?
AUTO (light out) – Power priority order logic is active.
ELEC_004
Recall the functions of the BUS TIE pb.
OFF – Power priority order logic is _______.
- AC Bus 1 and 2 can only be powered by their _______ engine generator.
- ____ or _____ generator power _____ be applied to the aircraft.
ELEC_004
Recall the functions of the BUS TIE pb.
OFF – Power priority order logic is deactivated.
- AC Bus 1 and 2 can only be powered by their respective engine generator.
- External or APU generator power cannot be applied to the aircraft.
ELEC_005
What is the purpose of the AC ESS FEED pb?
The AC ESS FEED pb is used to _____ command AC Bus ___ to power the AC ESS Bus.
When in the “light out” configuration:
▪ AC Bus __ powers AC ESS Bus. This the ______ configuration.
▪ Should AC Bus 1 fail, AC Bus __ automatically powers AC ESS BUS.
ELEC_005
What is the purpose of the AC ESS FEED pb?
The AC ESS FEED pb is used to manually command AC Bus 2 to power the AC ESS Bus.
When in the “light out” configuration:
▪ AC Bus 1 powers AC ESS Bus. This the normal configuration.
▪ Should AC Bus 1 fail, AC Bus 2 automatically powers AC ESS BUS.
ELEC_005
Recall the purpose of the AC ESS FEED pb.
When in the “light out” configuration:
▪ AC Bus __ powers AC ESS Bus. This the ______ configuration.
▪ Should AC Bus 1 fail, AC Bus __ automatically powers AC ESS BUS.
ELEC_005
Recall the purpose of the AC ESS FEED pb.
When in the “light out” configuration:
When in the “light out” configuration:
▪ AC Bus 1 powers AC ESS Bus. This the normal configuration.
▪ Should AC Bus 1 fail, AC Bus 2 automatically powers AC ESS BUS.
ELEC_005
Recall the purpose of the AC ESS FEED pb.
When selected to ALTN:
▪ AC Bus ___ is commanded to power AC ___ Bus regardless of the status of AC Bus __.
▪ _____ appears only when the pb is selected.
ELEC_005
Recall the purpose of the AC ESS FEED pb.
When selected to ALTN:
When selected to ALTN:
▪ AC Bus 2 is commanded to power AC ESS Bus regardless of the status of AC Bus 1.
▪ ALTN appears only when the pb is selected.
ELEC_007
What information is provided by the electrical power legends on the ECAM ELEC page for
GEN 1 & GEN 2 and APU GEN?
▪ ______ of output
▪ ______
▪ ______
ELEC_007
What information is provided by the electrical power legends on the ECAM ELEC page for
GEN 1 & GEN 2 and APU GEN?
▪ Percentage of output
▪ Voltage
▪ Frequency
ELEC_007
What information is provided by the electrical power legends on the ECAM ELEC page for:
o EXT PWR:
▪ ______
▪ ______
NOTE: The ____ ____ legend appears whenever the____ _____ cord is connected to the aircraft and Volts and Freqs meet requirements.
ELEC_007
What information is provided by the electrical power legends on the ECAM ELEC page for:
o EXT PWR:
▪ Voltage
▪ Frequency
NOTE: The EXT PWR legend appears whenever the external power cord is connected to the aircraft and Volts and Freqs meet requirements.
ELEC_008
Recall the display on the ECAM ELEC page of an unpowered AC or DC ESS SHED Bus.
The word _____ (____) appears under__ ___ or __ ___ buses only when the respective SHED Bus has ________ shed.
(Shed meaning ________).
ELEC_008
Recall the display on the ECAM ELEC page of an unpowered AC or DC ESS SHED Bus.
The word SHED (amber) appears under AC ESS or DC ESS buses only when the respective SHED Bus has automatically shed.
(Shed meaning unpowered).
ESV ELEC 08
The AC ESS SHED and DC ESS SHED Buses are auto shed during an approach in emergency electircal configuration. What evidence would you have of this occuring when referencing the ELEC page?
ESV ELEC 08
The AC ESS SHED and DC ESS SHED Buses are auto shed during an approach in emergency electircal configuration. What evidence would you have of this occuring when referencing the ELEC page?
“SHED” appears in amber underneathe the respective AC ESS or DC ESS Bus indication
ELEC_009
Explain the meaning of GALLEY SHED display on the ECAM ELEC page
o In-flight – When on ___ generator power, GALLEY SHED indicates that the galley’s ___ bus has been ______ depowered. However, its ______ bus remains powered.
ELEC_009
Explain the meaning of GALLEY SHED display on the ECAM ELEC page
o In-flight – When on single generator power, GALLEY SHED indicates that the galley’s main bus has been automatically depowered. However, its secondary bus remains powered.
ELEC_009
Explain the meaning of GALLEY SHED display on the ECAM ELEC page
o On the Ground –
With either external or APU generator power in use, both ____ and _____ galley buses remain powered.
ELEC_009
Explain the meaning of GALLEY SHED display on the ECAM ELEC page
o On the Ground –
With either external or APU generator power in use, both main and secondary galley buses remain powered.
ELEC_009
Explain the meaning of GALLEY SHED display on the ECAM ELEC page
o When the GALLEY pb is selected OFF:
GALLEY SHED indicates that the galley’s ____ and _____ buses are depowered.
ELEC_009
Explain the meaning of GALLEY SHED display on the ECAM ELEC page
o When the GALLEY pb is selected OFF:
GALLEY SHED indicates that the galley’s main and secondary buses are depowered.
ELEC_010
Recall the cautions associated with selecting the guarded IDG 1 and IDG 2 pbs:
To avoid damage to the IDG disconnect mechanism DO NOT:
▪ Disconnect unless the engine is _____ or is ____-______
▪ Hold the pb(s) for more than ____ (_) seconds.
ELEC_010
Recall the cautions associated with selecting the guarded IDG 1 and IDG 2 pbs:
To avoid damage to the IDG disconnect mechanism DO NOT:
▪ Disconnect unless the engine is operating or is wind-milling.
▪ Hold the pb(s) for more than three (3) seconds.
ELEC_011
Explain the color coding convention of the circuit breakers for a Green circuit breaker?
o Green:
▪ Circuit breaker is _______ by the _____ _____ ____ (___s).
▪ _______ message appears ECAM when CB is open for more than __ minute.
ELEC_011
Explain the color coding convention of the circuit breakers for a Green circuit breaker?
o Green:
▪ Circuit breaker is monitored by the Flight Warning Computers (FWCs).
▪ C/B TRIPPED message appears ECAM when CB is open for more than 1 minute.
ELEC_011
Explain the color coding convention of the circuit breakers for a
Black circuit breaker?
o Black:
▪ Circuit breaker is not ______ by the ____s therefore, no “_______” message is generated.
▪ The ______ which the circuit breaker supports may be ________ by the FWCs
ELEC_011
Explain the color coding convention of the circuit breakers for a
Black circuit breaker?
o Black:
▪ Circuit breaker is not monitored by the FWCs therefore, no “C/B TRIPPED” message is generated.
▪ The system which the circuit breaker supports may be monitored by the FWCs
Flight Warning Computers (FWCs)
ELEC_011
Explain the color coding convention of the circuit breakers for a Yellow circuit breaker?
o Yellow:
▪ ______ when flying on ______ only.
ELEC_011
Explain the color coding convention of the circuit breakers for a Yellow circuit breaker?
o Yellow:
▪ Pulled when flying on batteries only.
ELEC_011
Explain the color coding convention of the circuit breakers for a
Red circuit breaker?
o Red:
▪ The red cap around the circuit breaker prevents it from being ____.
▪ Provide circuit protection to the ___ ___ ___ (___).
ELEC_011
Explain the color coding convention of the circuit breakers for a
Red circuit breaker?
o Red:
▪ The red cap around the circuit breaker prevents it from being reset.
▪ Provide circuit protection to the Wing Tip Brakes (WTB).
ELEC_012
How is Generator 1 affected when the GEN 1 LINE pb is selected OFF?
o ____ generator 1’s line contactor, in affect _____ it from the remainder of the aircraft’s electrical system.
o Generator 1 is limited to only powering ___ fuel pump in ____ wing tank.
ELEC_012
How is Generator 1 is affected when the GEN 1 LINE pb is selected OFF?
o Opens generator 1’s line contactor, in affect isolating it from the remainder of the aircraft’s electrical system.
o Generator 1 is limited to only powering one fuel pump in each wing tank.
ELEC_013
Describe the two methods of activating the emergency generator?
1. Automatically:
▪ Loss of power to ____ ____ ___ and __ in flight will automatically deploy the Ram Air Turbine (RAT) and activate the ______ generator.
ELEC_013
Describe the two methods of activating the emergency generator?
- Automatically:
▪ Loss of power to AC Bus 1 and 2 in flight will automatically deploy the Ram Air Turbine (RAT) and activate the emergency generator.
ELEC_013
Describe the two methods of activating the emergency generator.
- Manually:
▪ Selecting the red guarded ___ ___ pb on the EMER ELEC PWR panel will _____ deploy the Ram Air Turbine (RAT) and _____ the emergency generator.
NOTE: Selecting the RAT MAN ON pb on the ____ panel will deploy the RAT but will ___ activate the emergency generator.
ELEC_013
Describe the two methods of activating the emergency generator.
- Manually:
▪ Selecting the red guarded MAN ON pb on the EMER ELEC PWR panel will manually deploy the Ram Air Turbine (RAT) and activate the emergency generator.
NOTE: Selecting the RAT MAN ON pb on the HYD panel will deploy the RAT but will not activate the emergency generator.
ELEC_014
Explain the configuration called “Emergency Generation After Loss of All Main Generators”.
It means that:
AC Buses ___ and ___ are unpowered and the ______ generator is powering:
- AC _____ Bus
- DC_____ Bus, through the ____ ____
- AC and DC _____ _____ buses through their _____ Buses
NOTE: The ECAM message for this configuration appears as: _____ _____ ______ “_______ _____ _________”. in RED
ELEC_014
Explain the configuration called “Emergency Generation After Loss of All Main Generators”.
It means that AC Buses 1 and 2 are unpowered and the Emergency generator is powering:
- AC ESS Bus
- DC ESS Bus, through the ESS TR
- AC and DC ESS SHED buses through their ESS Buses
NOTE: The ECAM message for this configuration appears as: ELEC EMER CONFIG “Emergency Electrical Configuration”.
ELEC_015
What occurs to the emergency generator when the landing gear is lowered?
The emergency generator is ______ _______, and the aircraft ________ become the _____ source of electrical power.
NOTE: A red ______ light illuminates on the ____ _____ _____ panel when AC Buses ___&____ are unpowered and the _____ is _____ but the _________ generator is not supplying power
ELEC_015
What occurs to the emergency generator when the landing gear is lowered?
The emergency generator is automatically deactivated, and the aircraft batteries become the sole source of electrical power
NOTE: A red FAULT light illuminates on the EMER ELEC PWR panel when AC Buses 1 and 2 are unpowered and the RAT is deployed but the emergency generator is not supplying power
ELEC_017
Recall the location and use of the MAINT BUS switch:
▪ Located on the _______ panel on the ceiling of the ________ galley.
▪ When selected ON, allows ______ power for ground servicing without energizing the entire aircraft’s electrical system.
▪ Only requires_______ power to be connected and have good Volts and Freqs.
ELEC_017
Recall the location and use of the MAINT BUS switch:
▪ Located on the electrical panel on the ceiling of the forward galley.
▪ When selected ON, allows external power for ground servicing without energizing the entire aircraft’s electrical system.
▪ Only requires external power to be connected and have good Volts and Freqs.
ELEC_018
Recall what would be powering the aircraft in this scenario:
- both engines are shut down
- the APU START pb indicates AVAIL
- the EXT PWR pb indicates ON
The aircraft is being powered by _____ ______ because it has priority over the ____ _______.
▪ The AVAIL light indicates that the APU is “___ _____”
▪ The ON light in the EXT PWR pb indicates that external power has been _________
ELEC_018
Recall what would be powering the aircraft in this scenario:
- both engines are shut down
- the APU START pb indicates AVAIL
- the EXT PWR pb indicates ON
The aircraft is being powered by External Power because it has priority over the APU generator.
▪ The AVAIL light indicates that the APU is “On Speed”
▪ The ON light in the EXT PWR pb indicates that external power has been selected
ELEC_019
Recall what would be powering the aircraft in this scenario:
- both engines are shut down
- the APU START pb indicates AVAIL (green)
- the EXT PWR pb indicates AVAIL (green
The aircraft is being electrically powered by the _____ generator.
▪ The AVAIL light in the APU START pb indicates that the APU is________.
▪ The AVAIL light in the EXT PWR pb only indicates that external power has been _______ to the aircraft and it meets________ ______ (good _____ &_______)
Therefore, since external power has not been selected _____ and the APU is running, the ______ generator is powering the aircraft.
(The APU generator’s pb is normally left in the____ (light ____) position.
NOTE: External power must always be ______ selected ON, using the ___ ____ pb, in order for it to be able to be _____ to the electrical system.
ELEC_019
Recall what would be powering the aircraft in this scenario:
- both engines are shut down
- the APU START pb indicates AVAIL (green)
- the EXT PWR pb indicates AVAIL (green
The aircraft is being electrically powered by the APU generator.
▪ The AVAIL light in the APU START pb indicates that the APU is running.
▪ The AVAIL light in the EXT PWR pb only indicates that external power has been connected to the aircraft and it meets power requirements (good Volts and Freqs).
Therefore, since external power has not been selected ON and the APU is running, the APU generator is powering the aircraft.
(The APU generator’s pb is normally left in the ON (light out) position.
NOTE: External power must always be manually selected ON, using the EXT PWR pb, in order for it to be able to be applied to the electrical system.
