ELECTRICAL SYSTEM Flashcards
1
Q
Sources of AC Power
A
- 2: Engine Generators
- 1: APU Generator
- 1: Ram Air Turbine (RAT)
- External Power
- Static Inverter
2
Q
Sources of DC Power
A
- 2 Batteries
- 3: TRU’s (TRU 1/2/ESS)
3
Q
GCU
A
- Generator Control Unit
4
Q
What do the GCU’s do?
A
- Control output of their respective generator
- Control the frequency and voltage of the GEN output
- Protect the network by controlling the associated (GLC)
5
Q
The output of an ENG GEN?
A
115-200V/400Hz/90KVA
3 - Phase
6
Q
The output of the APU GEN?
A
115-200V/400Hz/90KVA
3 - Phase
7
Q
The output of the RAT?
A
115-200/400Hz/5KVA
3 - Phase
8
Q
GAPCU
A
Ground and Auxilliary Power Unit
9
Q
What does a GAPCU do?
A
- Regulates, via the APU ECB, frequency and voltage of the APU GEN
- Protects the network by controlling the external power contactor and GLC
10
Q
Types of CB’s
A
- Green (Monitored)
- Black (Not-Monitored)
- Red Collared (WTB)
11
Q
How long until the DC BUS 2 supplies the DC BUS 1 and DC BAT BUS if the AC BUS 1 failed?
A
- Automatically after 5 seconds
12
Q
IDG
A
Integrated Drive Generator
13
Q
Electrical Priority
A
- G - Generator (onside)
- E - External Power
- A - APU
- R - RAT
- B - Batteries
14
Q
BCL
A
Battery Charging Limiter
15
Q
Do battery contactors normally stay open or closed?
A
Open
