In normal electrical configuration, how is DC ESS bus supplied
From TR 1 via DC bus 1 and DC Bat Bus
From ESS TR
From TR 2
From Batt 2.
What happens in case of total loss of main generators
The Rat is automatically extended and powers the yellow system which drives the emergency generator.
The Rat is automatically extended and powers the blue system which drives the emergency generator.
The Rat has to be manually extended
The Rat is extended and mechanically connected to the emergency generator.
the electrical power system consists of
A three phase 115/200 volt 400 hertz constant frequency AC system and a 28 DC system
A three phase 180/220 volt 400 hertz constant frequency system and a 28 volt DC system
A three phase 115/220 volt 400 hertz constant frequency system and a 28 volt DC system
A three phase 115/200 volt 400 hertz constant frequency DC system and a 28 volt AC system
Dc Bat bus can be supplied by
DC Bus 1 or batteries
DC Bus 1, DC Bus 2 or batteries
DC Bus 2 or batteries
DC Bus 1 only.
AC Bus tie contactors enable the electrical system
To be connected in parallel
To be supplied by any generator or external power
To be supplied by apu gen or external power only
To be tied to external dc power.
What happens during the emergency gen. test
The ram air turbine is extended
The blue system is pressurised and the emergency generator comes on line
The green system is pressurised and the emergency generator comes on line, supplied by hot bus 2.
The emergency generator comes on line and the yellow system is pressurised.
Normal minimum battery voltage before apu start is
22v.
25.5v
27.5v
Minimum
When disconnecting the IDG the button should be pressed
For no more than 3 secs
For longer than 3 secs
Until the fault light goes out
For no more than 5secs.
On the emergency electrical power panel, a fault light illuminates under the ‘ RAT and Emer.Gen.’ label. What does it mean
Rat is not extended
Emergency generator is not supplying when AC bus 1 and 2 are not powered or Dc Bat bus is not powered
Emergency generator is supplying but AC Ess bus is not powered
Emergency generator is not supplying when AC Bus 1 and 2 are not powered
What happens when the Gen 1 line Pb. is set to off
AC Bus one and 2 are not powered and emergency generator is automatically connected
AC Bus 1 is powered by the gen. 2 because the gen 1 is deactivated
AC Bus 1 is powered by the gen.2 because the gen.1 line contactor is opened
AC Bus 1 is not powered because the gen. 1 line contactor is opened and transfer contactor is not closed
Where can the battery voltage be checked
On the ECAM elec page only
On the elec overhead panel and the ECAM elec page
On the elec overhead panel and the ECAM E/WD
On the elec overhead panel only
AC essential bus is normally supplied by
AC Bus 1
AC Bus 2
Static inverter
Emer. gen
In flight on batteries only, the AC Ess Shed bus and DC Ess Shed bus are lost
Yes
No
Only A/C Ess Shed Bus is lost
Only D/C Ess Shed Bus is lost
The static inverter works
Always
When A/C speed is > 50kts and on batteries only
When one main generator fails
Only when gen. 2 fails
On ground what happens if the RAT and Emer. Gen. Man On Pb. Is pressed
The Rat is extended
The emergency generator is activated
Nothing
The blue hydraulic system is pressurised and this causes the RAT to extend and rotate.
The static inverter transforms the DC voltage from the battery bus into
Single phase 115v - 400 Hz. A/C current
Three phase 115/200v - 400hz. A/C current
28v D/C current
25.5v D/C current.
In flight in case of loss of all main generators, emergency generator not yet running (batteries only), the static inverter supplies
A/C Ess bus and Engine Ignition A
Eng Ignition & A/C Ess Bus & A/C Ess Shed Bus
Eng Ignition Only
Hot bus 1
The external power has priority over the Apu. gen.
Only in flight
No, Apu. gen. has priority over external power always
Gen 1 and Gen 2 when operating have priority over the Apu gen
Only on the ground
With Apu gen. available, if one main generator fails, the failed generator is replaced by
The APU
The other computer
Bus tie takes place and the remaining main generator supplies both channels
The RAT
If a TR fails
The other TR automatically replaces the faulty one & the Ess TR supplies the DC Ess Bus
The Static inverter replaces the faulty TR
The DC Bus on the faulty side is lost
The Emergency generator supplies DC power on the faulty side
In flight in case of loss of all main generators, emergency generator not running, the DC Ess Bus is supplied by
Hot bus 2
Ess TR
Both
In flight in case of loss of all main generators, emergency generator running , the DC Ess Bus is supplied by the
Hot bus
ESS TR
DC Bat bus
The IDG regulates the ........ of the generator
Speed
Voltage
Frequency
GLC (generator line contactor)
When switched to ALTN the AC Ess Feed p/b causes the AC Ess Bus to be
Supplied from AC bus 1
Supplied from AC bus 2
Supplied from DC bus 1
Supplied from DC bus 2
If AC bus 1 fails the AC Ess bus is supplied by
Emer Gen
In case of total electrical loss the AC Ess bus is supplied by
TR 1
In Emergency configuration, AC Ess shed bus is automatically shed
If the RAT stalls or aircraft is on ground with speed<100kts
When the landing gear is down
When in emergency configuration
When AC Bus 1 is lost
If one main generator fails in flight (and the APU generator is not being used)
Part of the galley load is automatically shed
All galley load is automatically shed once the APU generator becomes available.
All galleys are shed
All galleys are not shed
Can you reconnect the IDG in flight
No. 1 idg only
No. 2 idg only.
When Gen. 1 or Gen. 2 is selected to off
The Generator field is de-energised and the line contactor is open
The Generator is still energised and line contactor is open
Cannot select off in flight
Can only be reset on ground.
When the EXT Pwr Pb green avail is illuminated
The external power is connected to the a/c
The A/C network is supplied
Ground services are supplied
D/C network supplied
Emergency generation, the D/C bat bus is automatically connected to the batteries
below ‘s’ speed
below green dot speed
below 50kts
below 100 kts
When you want to check battery voltage, you must set the Bat Pb to
Auto position
Off position
Norm position
On position
The Bat fault light illuminates when
Battery voltage < 25v
Battery Pb switch is at off in flight
Charging current increases at an abnormal rate
Charging current is low
In certain cases the static inverter is supplied by
Hot bus 1 and Hot bus 2
D/C Bat bus
A/C Ess bus
