Electrical

Question 1

Location of Main Battery

Answer 1

Nose compartment

Question 2

Location of the APU Battery

Answer 2

Aft equipment bay

Question 3

Max Engine Generator load

Answer 3

40 KVA

Question 4

Max APU Generator load

Answer 4

40 KVA

Question 5

Max Transformer rectifier unit (TRU) load

Answer 5

120 amps

Question 6

Max permissible time for ground operations with battery power only

Answer 6

5 minutes

Question 7

What is the reason for max permissible time for ground operations with battery power

Answer 7

To prevent ED1 and ED2 from overheating (fans are AC powered)

Question 8

How many TRUs are installed

Answer 8

4

Question 9

Where are the TRUs located

Answer 9

nose compartment

Question 10

The Main Battery is rated to

Answer 10

17 ampere hour/24 volts

Question 11

APU Battery is rated to

Answer 11

43 ampere hour/24 volts

Question 12

How many generators are installed

Answer 12

four, 2 engine generators, 1 APU generator, 1 ADG

Question 13

What is the function of the 4 TRUs

Answer 13

To convert 115 V AC to 28 V DC

Question 14

How are the TRU’s cooled

Answer 14

Individual fans

Question 15

Which buses are powered when the Battery Master switch is selected on

Answer 15

Main battery direct bus

APU battery direct bus

DC Battery bus

Question 16

If the main buses are powered, are the essential buses automatically powered

Answer 16

Yes

Question 17

Is there an on/off switch for the TRU’S

Answer 17

No, they are automatically powered when the AC busses are powered

Question 18

What controls the DC tie contactors

Answer 18

The DC Power Centers (DCPC) automatically control DC tie operation

Question 19

When will the Air Driven Generator (ADG) automatically deploy

Answer 19

With complete loss of A/C power

Question 20

With the ADG deployed, what are the basic items that are powered

Answer 20

FlASH (Memory aid)

Flaps/Slats

AC Essential BUS

STAB trim CH2

Hydraulic Pump 3B

Question 21

What is the ADG max load

Answer 21

15 KVA

Question 22

What is on the accessory gearbox?

Answer 22

FISH Oil + Memory Aid

Fuel pump (engine driven high pressure)

Integrated drive generators

Starter (air turbine)

Hydraulic pumps (engine driven)

EDP’s Oil Pump

FADEC Alternator (+)

Question 23

What does TRU stand for?

Answer 23

Transformer Recitifier Unit

Question 24

Where is the external AC power receptacle located?

Answer 24

Lower right side forward nose area

Question 25

What is the AC electrical system rated at?

Answer 25

115VAC 400Hz 3 Phase

Question 26

What is the voltage of the DC electrical system?

Answer 26

28 VDC

Question 27

What is an Integrated Drive Generator (IDG)?

Answer 27

An AC Generator combined with a constant speed drive.

The IDG converts variable N2 RPM to constant 12,000 RPM generator speed

Question 28

How are TRU’s cooled?

Answer 28

Cooling fans located un the TRUs

Question 29

When do TRUs come online?

Answer 29

The TRUs come online when the AC bussses are powered

Question 30

If the main buses are powered, are the essential buses also powered?

Answer 30

Yes

Question 31

When will the Air driven generator (ADG) automatically deploy?

Answer 31

With compete loss of A/C power

Question 32

What is the minimum airspeed to configure the aircraft for landing on ADG power?

Answer 32

140 Kts