DC Electric Flashcards

1
Q

Describe the Starter/Generators

A

(2) 250Amp, 28VDC
Connected to N1 shaft
Starter function takes precedence over generator

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2
Q

L/R DC GEN

A

Left or Right generator is “Off Line”

Generator has failed
Generator Control Unit has failed
Generator has been knocked off-line
Generator has not been placed on-line

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3
Q

Max continuous load

A

250A

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4
Q

Load/Volt meters

A

Indicate demanded load
Normal 18 L and 20 R
Show generator BUS voltage when pushed

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5
Q

Voltage def.

A

pressure from inside battery or generator. “How much push”

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6
Q

Amps def.

A

How much flow. How fast the electrons are moving.

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7
Q

Load def.

A

How hard is the generator working relative to it’s maximum continuous output.

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8
Q

Items powered by the hot battery bus:

A
Fire Extinguishers (equipped aircraft)
Firewall shutoff valves
Standby fuel pumps (Straight 200s only)
Threshold lights (door & under wing)
Baggage light
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9
Q

Items powered by Left Gen Bus:

A

Main items:

Inverter #1
Avionics Bus #1
Pilot’s Windshield Heat
Air Conditioning Condenser Blower

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10
Q

Items powered by Right Gen Bus:

A

Main items:

Inverter #2
Avionics #2
Copilot's Windshield Heat
Landing Gear motor
Vent BLower motor
Aft Blower motor
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11
Q

Main items powered by #1 DF Bus:

A

Items labeled LEFT or #1 (except fuel)

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12
Q

Main items powered by #2 DF Bus:

A

Items labeled RIGHT or #2 (except fuel)

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13
Q

Main items powered by #3 DF Bus:

A

LEFT side fuel systems items

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14
Q

Main items powered by #4 DF Bus:

A

RIGHT side fuel system items

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15
Q

Min volts for battery start:

A

22V

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16
Q

Max sustained generator loading:

A

S/L to 31,000’…….100%
Above 31,000’…….88%
Ground Ops……….85%

17
Q

External Power Unit

A

Must deliver 1,000 amps momentarily,
300 amps continuous
28VDC

18
Q

Generator Bus Failure

A

Inverter failure on respective side (if in use)

Apparent loss of comm/nav for respective side