Electrics

Question 1

How long is the APU start inhibit when going into emergency electric configuration?

Answer 1

45 seconds

Question 2

What does the electrical system consist of?

Answer 2

Three phase 115/200V 400Hz AC system

And 28V DC system

Question 3

How long does RAT extension and coupling take?

Answer 3

8 seconds

Question 4

What is the minimum offline battery voltage?

Answer 4

25,5V

Question 5

How long can the batteries provide emergency power

Answer 5

Approximately 30 minutes

Question 6

What will happen if a single engine driven generator is lost and no APU generator available?

Answer 6

Shed part of the galley load and route power from other engine driven generator.

Question 7

At what speed will the rat stall?

Answer 7

140kts

Question 8

What are the functions of the GCUs? (Generators control units)

Answer 8

Control the output (freq and voltage) of their generator.

Protect the network by controlling the generator line contractor (GLC)