A300 Classic SKV Electrical Flashcards
What is the normal electrical supply for AC EMER BUS?
AC ESS BUS
In the electrical system the green flow bars on the battery tiles are an indication that the battery tiles are in what state?
Connected to the DC ESS bus
Which electrical busses does the Standby Gen supply?
DC ESS bus, AC ESS #2 bus, AC EMER bus
Illumination of the AC BUS 1 OFF, AC ESS BUS, and AC EMER ON INV lights while inflight indicates that this component has failed.
AC BUS #1
If AC ESS BUS is lost due to a fault on the AC BUS #1, how is power restored to the AC ESS BUS?
Select OVRD SUPPLY 1 switch to ON
If OVRD SUPPLY #1 is supplying AC ESS BUS, and the #1 IDG fails, how is power restored to the AC ESS BUS?
Deselect OVRD SUPPLY #1 then Select OVRD SUPPLY #2 ON
The IDG is disconnected while airborne, when can the IDG be reconnected?
Only by a mechanic when on the ground
What happens when both AC OVRD Supply switches are selected ON?
AC EMER, AC ESS, and DC ESS are the only busses supplied
What is the normal electrical supply for AC ESS BUS?
AC bus #1
In the electrical system, what items are not on the HOT battery BUS?
Eng and Cargo Fire detection systems
What is the DC NORMAL Bus powered by?
TR 1 & 2
If the AC ESS BUS is lost, how may the AC EMER BUS be supplied?
DC ESS BUS via automatic activation of the Emergency Static Inverter
In the A300 electrical system, what are the three DC Buses?
HOT Battery Bus, DC ESS, and DC NORM
Which switch will manually connect the batteries to the DC ESS bus?
BAT OVRD
What is lost with the BAT OVRD switch selected ON?
STBY GEN operation, BAT overheat protection, and BAT charging
How does selecting the LAND RECOVERY switch ON affect the STBY GEN operation?
It disconnects the DC ESS BUS from the STBY GEN and uses the batteries to power the DC ESS BUS
With the Standby Generator running, what happens if the BAT OVRD is selected ON?
Standby Gen quits supplying the emergency electrical system
In the A300 electrical system, what are the 4 AC buses?
AC EMER, AC ESS, and AC #1 & #2
How is an IDG disconnect confirmed?
The IDG FAULT light extinguishes and Gen FAULT light illuminates
During an electrical emergency, selecting the LAND RECOVERY switch ON provides what function?
It restores electrical power to some equipment for approach and landing
During STBY GEN operation, if an APU start is unsuccessful, why is it important to place the APU Master switch back to the OFF position?
To re-connect the DC portion of the standby generator and disconnect the 3 batteries from the DC Ess Bus
How can the crew confirm that the standby generator is operating and supplying power to the electrical system?
The Blue AC EMER ON INV light and the Amber DC ESS ON BAT lights are extinguished and Fuel Crossfeed valve is in-line
The aircraft is in-flight, the #1 engine has failed, and the APU is not operating, how will the electrical system be configured?
GEN 2 automatically powers AC BUS 1
What will the Battery Charge Controller (BCC) do if BAT 1 overheats?
Automatically disconnect BAT 1
If the aircraft batteries are the only source of electrical power, what busses will they supply?
DC ESS BUS and AC EMER BUS
In normal operation, what powers AC BUS 2?
GEN 2
A Fault is detected on AC BUS 1 and it is disconnected, which switch will connect GEN 2 to the AC ESS BUS directly?
OVRD SUPPLY 2
The APU is operating and EXT PWR is connected and selected ON. In this configuration, what is supplying the electrical system?
EXT PWR, it has priority over the APU GEN
When does the Battery Charge Controller (BCC) not connect the batteries to the DC ESS BUS?
DC ESS BUS supplied by Standby GEN
Both generators fail in-flight. The standby generator fails to automatically start. Which switch can manually start the standby generator?
STBY GEN
If all electrical power sources are available, what is the auto switching priority of the AC electrical system?
Onside Gen, Ext power, APU, Other Gen
During an electrical emergency, what items are recovered when the LAND RECOVERY switch is selected ON?
1 slat motor, 1 flap motor, spoiler/speedbrake/ground spoiler panels 2,3,5,7, Normal Brakes, Normal Anti-Skid
Avionics smoke drill is equivalent to standby generator in that they both have three buses that are de-energized. What three buses are they?
AC Bus 1 & 2 and DC Normal
When powering up an unpowered aircraft, what is indicated if the blue AC EMER ON INV light does not illuminate when the batteries are switched on?
A fault with the Inverter
Selecting the MECH CALL HORN CTL switch (on the overhead panel) to ON does what?
It deactivates the nose gear mechanic call horn for battery discharge on an unpowered aircraft
What is the NORMAL supply for DC ESS BUS?
DC NORM BUS via DC BUS TIE and the ESS TR
