Electrical

Question 1

IDG Output

Answer 1

40 kVA, 115V AC, 400 Hz, 3-phase

Question 2

Left Main AC

Answer 2

 Left Essential TRU
 Left Main TRU
 AUX TRU
 Emer AC Bus
* EBHA Batt
* UPS Batt
 SPDS

Question 3

Right Main AC

Answer 3

 Right Essential TRU
 Right Main TRU
 AUX TRU (If L Main AC Bus not powered)
 SPDS

Question 4

60 hz converters do what

Answer 4

Converts 115 VAC, 400 Hz, 3 phase to - 115 VAC, 60 Hz, Single phase

Question 5

Cabin sockets

Answer 5

o Cabin outlets rated - 3 Amps
o Galley, Lav, Baggage rated - 15 Amps

Question 6

RAT Load

Answer 6

• Capable of 100% load up to FL 450

Question 7

RAT Deployment

Answer 7

o Below M.935
o Maintain > 200 kts

Question 8

Main Batts output

Answer 8

25 Volts, 53 amp/hr Ni-CAD
o 22 volts minimum

Question 9

PDBs (4) Power Distribution Boxes

Answer 9

o Protection via CBs
o Sent to LEFT and RIGHT PDBs that then distribute the power
 Left PDB in the LEER
 Right PDB in the REER
o EBHA bus in tail
o AFT PDB in tail with 6 CBs for battery buses and GSB control

Question 10

GCU’s (4) Generator Control Units

Answer 10

o 2 IDGs, APU and RAT
o Produce quality power
o In the LEER and REER

Question 11

BPCUs (2) Bus Power Control Units

Answer 11

o Make all logical decisions for electrical distribution and protection
o Efficiently supplies power to busses
o Detects faults and lockouts if necessary
o Provides protection, power and logic to AC/DC reset switch
o Monitors external AC and DC power
o Controls the No Break Power Transfer (NBPT) function
o In the LEER and REER