Electrical System

Question 1

Electrical system components

Answer 1

*4 Independent Engine driven generators
*1 APU Starter Generator
*2 Nickel-Cadmium Batteries
*1 Lead-Acid Backup Battery
*1 AC Inverted

Question 2

Engine driven generator voltages

Answer 2

28 VDC 400 Amps

Question 3

APU Gen Voltage

Answer 3

28 VDC 400 Amps

Question 4

Battery Voltage

Answer 4

24 VDC 44 Amps

Question 5

Backup Battery Voltage

Answer 5

24 VDC 4 Amps

Question 6

AC inverter Converts

Answer 6

28 VDC to 115 VAC

Question 7

Max Load in Main Generator

Answer 7

400 Amps

Question 8

Max load in APU Gens and Altitudes

Answer 8

400 Amps : Up to FL300
300 Amps : FL300-FL370

Question 9

The Generator will come on line when ?

Answer 9

Engine speeds stabilize above 56.4% of N2

Question 10

Max Battery Temp

Answer 10

70º C

Question 11

Min Battery Temp for Engine Start ?

Answer 11

-20º C

Question 12

Where are the Engine Generators ?

Answer 12

Two Gens On each engine accessory drive box

Question 13

What Gens are in Left and right Engine

Answer 13

Left Engine Gen 1 and 3 ( odds # )
Right Engine Gen 2 and 4 (even # )

Question 14

Where are the main 2 Batteries

Answer 14

Left side on the nose

Question 15

Where is the Backup battery

Answer 15

Right side in the nose

Question 16

Where is the inverter located

Answer 16

Left side nose

Question 17

What is the ASC

Answer 17

APU Starter Contactor , the ASC opens when the APU in 95% plus 7 seconds

Question 18

The EMB 145 electrical system in managed by:

Answer 18

EDL : Electrical distribution logic

Question 19

EDL FUNCTIONS ARE?

Answer 19

• Manages Automation of electrical system
• Also manages :
• Load shearing and shedding
• System redundancy
• Fault Protection

Question 20

DC BUS 1 Supplies power to

Answer 20

*Essential DC Bus 1
*Shed Bus 1
*Hot bus 1