Chapter 2.2 & 2.8 Electrical and Hydraulics

Question 1

APU Generator description

Answer 1

3 phase, 35 kVA, 115 volt, 400 Hz

Question 2

Generator Control Unit protects from what?

Answer 2

Over/Underfreq, OverVoltage, Feeder Fault

Question 3

Describe the #1 and #2 AC Pri

Answer 3

3 phase, 30/45 kVA, 115 volt, 400 Hz

Question 4

What are the 3 piggies

Answer 4

(1) Backup Hyd on the #1 AC Pri,
(2) Mission Avionics (AC Sec),
(3) Main Rotor De-Ice (AC Monitor)

Question 5

Percentages for the Battery

Answer 5

-80%: 9 min / 11 min (DAY / NIGHT)
-40% BATT LOW CHARGE
-35% DC Essential is dropped
-30% may be insufficient for CADs

Question 6

Describe the Converters

Answer 6

convert 115-volt AC into 28 volt DC. Powered by the AC buses

Question 7

Describe the Battery

Answer 7

24 volt Nickel Cadmium Battery: primarily used to start APU and power Battery Util Bus