Two generators are needed to supply the DC BUS Entertainment, except on ground, where the APU generator (if not overloaded) or the external power is sufficient.
The APU is supplying the electrical system. What is the order of priority for the different generators?
The BAT FAULT light will illuminate when:
The battery charge limiter is in fault. It is accompanied by an ECAM alert, when the charging current for the corresponding battery is outside limits.
DC Bat Bus can be supplied by:
Which of the following AC busses can be powered by the emergency generator?
if the BAT 1 "OFF" white light is illuminated:
The battery charge limiter is not operating and the battery line contactor is open. The DC BAT BUS is supplied. Hot buses remain supplied.
While operating on Emergency Electrical Power with the landing gear lowered which of the following control laws is in effect?
How many times can you reset a circuit breaker?
While operating on Emergency Electrical Power (EMER GEN powering the system) how is it possible to properly complete the ECAM checklist with only an upper display?
In normal electrical configuration, how is DC ESS bus supplied:
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What is the minimum voltage when conducting a BATTERY CHECK?
The purpose of the AUTO BUS TIE is to allow either engine-driven IDG to automatically power both main AC buses in the event of a generator loss until either ground power or the APU generator is activated.
FAILURE OF ONE TR - The contactor of each TR opens automatically, in case of:
The other TR automatically replaces the faulty one. The ESS TR supplies the DC ESS BUS.
What is the meaning of the green AVAIL light?
If batteries are the only source of power in flight, how long will battery power be available?
In the event that normal AC power is not available, an emergency generator can provide AC power. In the event that all AC power is not available, the electrical power system can invert DC power from the batteries into AC power.
What happens in case of total loss of main generators?
In a SMOKE configuration the main busbars are shed.
The electrical distribution is the same as it is in the emergency electrical configuration (loss of main generators), except the fact that in smoke configuration the fuel pumps are connected upstream of the GEN 1 line connector.
What is the significance of the green collared circuit breakers?
When out for more than 1 min, the C/B TRIPPED warning is triggered on the ECAM.
After IDG disconnection why do you get a GALLEY SHED indication on the SD?
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The IDG shall be disconnected only when the engine is running or windmilling. If not, the IDG will be damaged when starting the engine.
Maintaining the IDG pb-sw during more than 3 seconds may also damage the IDG disconnection mechanism.
Aircraft on ground in Emergency electrical configuration - The batteries automatically connect to the DC BAT bus when speed decreases below _____.
Below 100 kt, the DC BAT BUS is automatically connected to the batteries. Below 50 kt, the AC ESS BUS is automatically shed, leading to the loss of all display units.
What cockpit lighting is available during an emergency electrical situation?
What does the blue EXT PWR ON light mean?
The RAT is connected directly and mechanically to the Emergency Generator.
What is the function of the GEN 1 LINE push button?
In cruise, you have suddenly a Master Warning and caution comes on with ELEC EMER CONFIG. You notice a red FAULT light on the RAT and EMER GEN pushbutton. What does it indicate?
The number 1 AC bus channel normally supplies power to _____ and to the _____ bus which supplies power to the ______ bus.
The IDG FAULT light comes on, if:
The FAULT light comes on, if IDG oil outlet overheats (above 180 deg.C), or IDG oil pressure is low (inhibited at low engine speed: N2 below 14 %).
Which flight control computers are operational in the Emergency Electrical Power configuration (gear down and batteries powering the system)?
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The engine generators and APU generator are rated at _____ KVA.
Which busses will be powered after the RAT is extended and the EMER GEN begins producing power?
When no other power is available in flight, the static inverter converts _____ power to AC power for the _____ bus and _____ powers the _____ bus.
Which voltage requires recharging or replacing the batteries?
The generators can be connected in parallel.
The generators cannot be connected in parallel.
Which flight control computer will be inoperative with gear extension while in the Emergency Electrical Configuration?
If AC Bus 1 fails the AC ESS bus is supplied by the:
If a TR fails:
In flight on batteries only, the AC ESS Shed bus and DC ESS Shed bus are lost.
FAILURE OF AC BUS 1 - DC BUS 2 supplies DC BUS 1 and DC BAT BUS automatically after _____
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An automatic thermal disconnection of the IDG will occur if the temperature reaches:
The IDG FAULT light will also come on when IDG oil outlet overheats (above 180 deg.C)
While operating on Emergency Electrical Power with the landing gear lowered which of the following statements is correct?
During the 5 seconds it takes for the RAT to extend:
If during a normal flight the BUS TIE pb is depressed to "OFF", what effect would this have on power to the busses?
An AC ESS FEED switch located on the overhead panel shifts the power source for the AC ESS bus from:
In flight in case of loss of all main generators, emergency generator not running, the DC ESS Bus is supplied by:
Normal minimum battery voltage before APU start is:
The BATTERY BUS is normally powered by the:
The RAT powers the blue hydraulic system, which drives the emergency generator by the means of an electric motor.
The RAT powers the blue hydraulic system, which drives the emergency generator by the means of a hydraulic motor. This generator supplies the AC ESS BUS, and the DC ESS BUS via the ESS TR.
The Airbus A320 has _____ batteries in its main electrical system.
There are two main batteries, each with a normal capacity of 23 Ah.
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What would cause the GALLEY fault light to illuminate?
Entering a dark cockpit, what action is necessary before checking the battery voltages?
The normal priority for supplying electrical power to the AC busses is:
GEN 1 and 2 when operating have priority over the APU generator and over external power. External power has priority over the APU generator when the EXT PWR pb switch is ON.
The aircraft batteries are always connected to the DC BAT BUS.
The two batteries are connected to the DC BAT BUS, if they need charging. When they are fully charged, the battery charge limiter disconnects them.
If both AC BUS 1 and AC BUS 2 are lost and the aircraft speed is above _____, the RAT extends automatically.
While operating on Emergency Electrical Power (EMER GEN powering the system, FAC 1 reset) which of the following control laws are in effect?
Are there any limitations associated with disconnecting an IDG?
When are the Essential Shed buses powered by the battery?
What does the BUS TIE Pushbutton do when Selected OFF?