A300 Classic SKV Electrical

Question 1

What is the normal electrical supply for AC EMER BUS?

Answer 1

AC ESS BUS

Question 2

In the electrical system the green flow bars on the battery tiles are an indication that the battery tiles are in what state?

Answer 2

Connected to the DC ESS bus

Question 3

Which electrical busses does the Standby Gen supply?

Answer 3

DC ESS bus, AC ESS #2 bus, AC EMER bus

Question 4

Illumination of the AC BUS 1 OFF, AC ESS BUS, and AC EMER ON INV lights while inflight indicates that this component has failed.

Answer 4

AC BUS #1

Question 5

If AC ESS BUS is lost due to a fault on the AC BUS #1, how is power restored to the AC ESS BUS?

Answer 5

Select OVRD SUPPLY 1 switch to ON

Question 6

If OVRD SUPPLY #1 is supplying AC ESS BUS, and the #1 IDG fails, how is power restored to the AC ESS BUS?

Answer 6

Deselect OVRD SUPPLY #1 then Select OVRD SUPPLY #2 ON

Question 7

The IDG is disconnected while airborne, when can the IDG be reconnected?

Answer 7

Only by a mechanic when on the ground

Question 8

What happens when both AC OVRD Supply switches are selected ON?

Answer 8

AC EMER, AC ESS, and DC ESS are the only busses supplied

Question 9

What is the normal electrical supply for AC ESS BUS?

Answer 9

AC bus #1

Question 10

In the electrical system, what items are not on the HOT battery BUS?

Answer 10

Eng and Cargo Fire detection systems

Question 11

What is the DC NORMAL Bus powered by?

Answer 11

TR 1 & 2

Question 12

If the AC ESS BUS is lost, how may the AC EMER BUS be supplied?

Answer 12

DC ESS BUS via automatic activation of the Emergency Static Inverter

Question 13

In the A300 electrical system, what are the three DC Buses?

Answer 13

HOT Battery Bus, DC ESS, and DC NORM

Question 14

Which switch will manually connect the batteries to the DC ESS bus?

Answer 14

BAT OVRD

Question 15

What is lost with the BAT OVRD switch selected ON?

Answer 15

STBY GEN operation, BAT overheat protection, and BAT charging

Question 16

How does selecting the LAND RECOVERY switch ON affect the STBY GEN operation?

Answer 16

It disconnects the DC ESS BUS from the STBY GEN and uses the batteries to power the DC ESS BUS

Question 17

With the Standby Generator running, what happens if the BAT OVRD is selected ON?

Answer 17

Standby Gen quits supplying the emergency electrical system

Question 18

In the A300 electrical system, what are the 4 AC buses?

Answer 18

AC EMER, AC ESS, and AC #1 & #2

Question 19

How is an IDG disconnect confirmed?

Answer 19

The IDG FAULT light extinguishes and Gen FAULT light illuminates

Question 20

During an electrical emergency, selecting the LAND RECOVERY switch ON provides what function?

Answer 20

It restores electrical power to some equipment for approach and landing

Question 21

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?

Answer 21

To re-connect the DC portion of the standby generator and disconnect the 3 batteries from the DC Ess Bus

Question 22

How can the crew confirm that the standby generator is operating and supplying power to the electrical system?

Answer 22

The Blue AC EMER ON INV light and the Amber DC ESS ON BAT lights are extinguished and Fuel Crossfeed valve is in-line

Question 23

The aircraft is in-flight, the #1 engine has failed, and the APU is not operating, how will the electrical system be configured?

Answer 23

GEN 2 automatically powers AC BUS 1

Question 24

What will the Battery Charge Controller (BCC) do if BAT 1 overheats?

Answer 24

Automatically disconnect BAT 1

Question 25

If the aircraft batteries are the only source of electrical power, what busses will they supply?

Answer 25

DC ESS BUS and AC EMER BUS

Question 26

In normal operation, what powers AC BUS 2?

Answer 26

GEN 2

Question 27

A Fault is detected on AC BUS 1 and it is disconnected, which switch will connect GEN 2 to the AC ESS BUS directly?

Answer 27

OVRD SUPPLY 2

Question 28

The APU is operating and EXT PWR is connected and selected ON. In this configuration, what is supplying the electrical system?

Answer 28

EXT PWR, it has priority over the APU GEN

Question 29

When does the Battery Charge Controller (BCC) not connect the batteries to the DC ESS BUS?

Answer 29

DC ESS BUS supplied by Standby GEN

Question 30

Both generators fail in-flight. The standby generator fails to automatically start. Which switch can manually start the standby generator?

Answer 30

STBY GEN

Question 31

If all electrical power sources are available, what is the auto switching priority of the AC electrical system?

Answer 31

Onside Gen, Ext power, APU, Other Gen

Question 32

During an electrical emergency, what items are recovered when the LAND RECOVERY switch is selected ON?

Answer 32

1 slat motor, 1 flap motor, spoiler/speedbrake/ground spoiler panels 2,3,5,7, Normal Brakes, Normal Anti-Skid

Question 33

Avionics smoke drill is equivalent to standby generator in that they both have three buses that are de-energized. What three buses are they?

Answer 33

AC Bus 1 & 2 and DC Normal

Question 34

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?

Answer 34

A fault with the Inverter

Question 35

Selecting the MECH CALL HORN CTL switch (on the overhead panel) to ON does what?

Answer 35

It deactivates the nose gear mechanic call horn for battery discharge on an unpowered aircraft

Question 36

What is the NORMAL supply for DC ESS BUS?

Answer 36

DC NORM BUS via DC BUS TIE and the ESS TR