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Longitude > Electrical > Flashcards

Electrical Flashcards

1
Q

What Type Are The Main Batteries And Where Are They Located?

A

(2) Lithium-Ion Batteries, Located Behind Access Doors On Either Side Of The Fuselage, Aft Of The Wing

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2
Q

What Are The Batteries Rated At

A

27 Volts and 44 Amp Hours

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3
Q

How Long Can The Batteries Provide Power To The Emergency Bus Items?

A

At Least 42 Minutes

  • If Emergency Power Is Selected Within 5 minutes Of Losing All Generator Power
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4
Q

Where Is The Standby Battery Located?

A

Left Nose Compartment

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5
Q

What Kind Of Battery Is the Standby?

A

Lead Acid

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6
Q

What Does The Standby Battery Provide Emergency Power To?

A

The Standby Flight Display

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7
Q

What’s The Standby Battery Rated At?

A

24 VDC And 10.5 Amp Hours

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8
Q

How Is The Standby Battery Tested?

A

The STBY PWR Switch In The Cockpit

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9
Q

The Standby Battery Is Charged From The ________ ________ ________

A

Left Mission Bus

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10
Q

How Long Does The Standby Battery Provide Power?

A

180 Minutes Of Electrical Power To The Standby Bus In The Event Right Mission Bus Power Is Lost

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11
Q

An Illuminated Amber Light Adjacent To The STBY PWR Switch Mean?

A

The Standby Bus Is No Longer Receiving Power From The Right Mission Bus

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12
Q

What Powers The Emergency Lights In The Event Of An Electrical System Failure?

A

(4) Battery Packs

2 Located On Cockpit Floorboard
2 Located On Aft Pressure Bulkhead

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13
Q

The 4 Battery Packs Are Continuously Charged From?

A

Emergency Buses

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14
Q

What Are The Engine-Driven Generators Rated At?

A

28.5 Volt DC
Rated At 500 Amps In Flight
And 400 Amps On The Ground

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15
Q

APU Generator

How Many Volts?

What’s It Rated At?

A

28.5 Volt DC

400 Amps In Flight
500 Amps On The Ground

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16
Q

GTU (Generator Control Unit)

What Do They Provide?

A

Regulation
Control
Protection
Selective Disengaging Of Power Generators For Defected Faults

17
Q

If Using External Power, Unit Must Be Set To?

A

Between 26-30 Volts And 1500 Amps Max

(Batteries Can Discharge If Below 28.5 VDC)

18
Q

What Does The Bus Tie Do?

A

Connects The Left And Right Buses When Only One Power Source Is Available

19
Q

The Power Transfer And Conversion Unit (PTCU) Can Do What?

A

Act As A Hydraulically Powered Electrical Generator

20
Q

The PTCU Is Rated At?

A

28 Volts DC And 200 Amps In Flight, When In Hydraulic Generator Mode

21
Q

The PTCU Can Be Powered By?

A

Either A or B Hydraulic System

22
Q

The PTCU Can Generate Enough Power To Operate All Electrical Systems On What Buses?

A

Emer And Mission Buses

23
Q

Where Are The Inverters, How Many Are There And What Do They Do?

A

(6) Inverters

Located In The Nose

Converts DC Power To AC Power For The Electrical Windshield Heat

24
Q

Bus Tie Operation On The Ground Is ____________ And Pushing The Bus Tie Button ____ ____ ______

A

Automatic

Has No Effect

25
Q

ELEC NORM/EMER Buttons Do What?

A

NORM: Controls The Connection Of The Emergency Buses To The Mission Bus

EMER: Disconnects The Emergency Bus From The Mission Bus

26
Q

The MAIN Buttons Do What?

A

ON: Connects Main Bus To The Mission Bus

OFF: Disconnects Main Bus From Mission Bus

27
Q

What Does The Interior Button Do?

A

NORM: Connects Interior Buses to Mission Bus

OFF: Disconnects Interior Buses From Mission Bus

28
Q

How Do You Test The STBY PWR?

A

Hold Switch In The Test Position For 10 Sec To Verify The Battery Has Sufficient Charge
* Green Light Will Illuminate If Battery Is Testing Successfully

29
Q

What Does The Amber Light Mean When Illuminated On The STBY PWR Panel?

A

The Standby Bus Is No Longer Receiving Power From The Right Mission Bus

30
Q

What Does External Power Connect To?

A

Right Emergency Bus

31
Q

In Order For Full Windshield Heat, You Need What?

A

(2) Generators

Longitude (18 decks)

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