A220 Electrical Questions with Detailed Verified Answers

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A220 Electrical Questions with Detailed
Verified Answers

Question: How many Amps are each TRU rated at?

Ans✅ ✅: TRU 1: 350 Amps

TRU 2: 350 Amps

TRU 3: 225 Amps (Additional 125 Amps dedicated to Fly-By-Wire Power Converters
(FBWPC))

Question: Up to what altitude cans the APU genorator be used?

Ans✅ ✅: 41,000 feet

Question: What is the maximum load of the AC generators?

Ans✅ ✅: 75 kVA continuous

Question: What is used on the A220 to provide emergency AC power?

Ans✅ ✅: RAT (Ram air turbine)

Question: How many TURs do we have in the a220?

Ans✅ ✅: 3

Question: What are the two primary sources of AC power?

Ans✅ ✅: The 2 VFGs (variable frequency generator)

Question: How many batteries do we have on the aircraft?

Ans✅ ✅: 2

Question: What types of batteries do we have on the aircraft?

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Ans✅ ✅: NiCad Batteries (nickel Cadmium)

Question: What are the 4 Possible sources of AC power for the aircraft
(ground and in flight)?

Ans✅ ✅: 1. VFGs

2. APU

3. EXT AC

4. RAT

Question: What does PMAG stand for? What is it used for?

Ans✅ ✅: A. Permanent Magnet Alternator/Generator

B. FBWPC's (Alternate Source) and EEC of each FADEC

Question: What are the 3 parameters checked when EXT AC power is
connected to the aircraft?

Ans✅ ✅: Frequency, Voltage, Phase

Question: When connected, if the external AC power is suitable, what
indication do you have on the overhead panel?

Ans✅ ✅: Green AVAIL light on the external power switch

Question: In what condition does the RAT provide emergency AC
power?

Ans✅ ✅: Complete loss of AC power

Question: Where is the RAT stored?

Ans✅ ✅: Right side of the wing-to-belly fairing, near the right main landing gear.

Question: How many kVA is the RAT rated for?