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MV-22 Osprey > Electrical System > Flashcards

Electrical System Flashcards

0
Q

The AC power is used for operation and control of _____ _____.

A

Aircraft systems

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1
Q

The electrical system consists of ___ solid state regulated converters, a ___-ampere hour sealed lead acid battery, and ___ DC buses.

A

3
24
6

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2
Q

What are the two ways to get power without the proprotors turning?

A

External power

CFG 1 when the APU is running

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3
Q

CFGs provide ___/___ volts, _____ phase, ___ Hz AC power.

A

115/200
Three
400

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4
Q

What are the two sources of DC power?

A

Battery

Regulated converters

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5
Q

The battery provides power for _____ starting or _____ _____.

A

APU

Ground maintenance

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6
Q

The AC electrical system provides power for what three things?

A

Main power
IPS
Environmental control system

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7
Q

Main power is provided by which generators?

A

CFGs

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8
Q

CFG 1 is cooled by the _____ and CFG 2 is cooled by the _____.

A

MWGB

TAGB

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9
Q

The CFGs weigh ___ pounds

A

80

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10
Q

The VFGs provide ___/___ V, ____ phase, ___ - ___ Hz AC power

A

115/220
Three
360-457

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11
Q

Each CFG is rated at ___ kilovolt ampere (kVA) and power the No.1 and No. 2 _____ _____

A

40

AC buses

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12
Q

The VFGs provide power to which systems?

A

IPS

ECS

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13
Q

Each VFG weighs ___ pounds and is rated at __/__ kVA

A

60

50/80

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14
Q

How are the VFGs cooled/lubricated and how do you check the oil level?

A

They have self-contained cooling/lubricating systems and have sight gauges to check the oil level

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15
Q

On hotter days, normally expect _____ power availability from the VFGs

A

Less

16
Q

Oil temps from ___-___, VFG rated at 80 kVA

A

-54°C - 75°C

17
Q

Oil temperatures from ___-___, VFG rated at 50 kVA

A

76°C - 95°C

18
Q

Internal to each VFG is a separate and isolated set windings that make up a _____ _____ _____.

A

Permanent magnet generator

19
Q

The sole purpose of the PMGs is to provide power to the _____

A

FCCs 1 & 2

20
Q

The PMGs provide a maximum power output of ___ volt amps

A

420

21
Q

The _____ provides an electrical method for monitoring low oil levels in the aircraft generators

A

Ground refuel/defuel panel

22
Q

The generator control units do what three things?

A
  1. Provide frequency, voltage, and differential feeder current monitoring.
  2. When within parameters, allow generators to connect to the circuits.
  3. When a fault is detected, will not allow the generator to energize respective circuits.
23
Q

Can the CFGs supply power for the IPS?

A

No

24
Q

If at least one VFG remains online, it will supply anti-ice protection to what?

A

Engine inlets

Spinner afterbodies

25
Q

Can the CFGs power the ECS?

A

Yes through an automatic bus tie should the VFG fail

26
Q

The battery is directly connected to the _____ & _____ buses.

A

Unswitched

Maintenance

27
Q

The battery is normally charged by the _____ regulated converter.

A

No. 3

28
Q

The battery is a ___ volt DC, ___ amp-hour battery.

A

24

24

29
Q

At 80% charge the battery provides sufficient power for what three things and still have 18% capacity remaining?

A
  1. Pressure refueling
  2. 3-minute prestart period
  3. Two APU start cycles
30
Q

In flight, at 80% charge, the battery will provide ___ minutes of emergency power for flight essential equipment.

A

20

31
Q

Certain failure modes and/or repeated generator reset attempts could cause what to happen?

A

A fire

32
Q

What six things do you lose with an essential/battery bus failure?

A
  1. Standby attitude indicator
  2. Standby flight display
  3. COMM 1 & 2
  4. ICS
  5. Fire detection/protection system
  6. Audio warnings and tones
33
Q

Cycling operable CONV circuit breakers increases the chance of what?

A

Losing more than one bus

MV-22 Osprey (7 decks)

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