Electrical System Flashcards
The primary electrical system on the G550 aircraft is:
AC electrical power
How Many IDGs does the G550 have?
Three.
Where are the IDGs located?
One mounted on each engine high speed turbine, and one mounted on the auxiliary power unit (APU).
What kid of power do the IDGs produce?
Three phase (3φ) 115/200V AC at 400 Hz
The IDGs are rated at:
40Kva.
Can the APU Generator provide full AC output in the air if necessary, supplanting an inoperative engine generator?
YES
If engine and APU powered generators are not available…
Theres a standby generator.
What rotates the SBY Generator?
A hydraulic motor using pressure from the left hydraulic system fluid pressurized by the right hydraulic system through the PTU(power transfer unit).
Whats the capacity of the SBY Generator?
Will produce 10Kva 3φ 115/200V AC power for aircraft systems.
If no AC power can be generated…
an emergency inverter powered by DC from the aircraft batteries through the left and/or right essential DC bus can supply AC power at a single phase (φA) to operate equipment on the essential AC bus.
Where can an external AC power supply be plugged on the ground?
a receptacle in the service access panel on the nose of the aircraft to power aircraft systems for maintenance or preflight inspections.
Direct Current (DC) is obtained by…
Transforming and rectifying aircraft AC power into DC.
How many TRUs does the G550 have?
Five (5).
What powers the TRUs?
Powered by the aircraft AC buses, produce DC power at a nominal 28 volts (voltage of the TRUs is not regulated and varies with load - normal voltage range is 26V to 29V).
If all AC power is lost, the TRU’s will be…
Inoperative.
