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Q300 > Electrical > Flashcards

Electrical Flashcards

1
Q

When the battery master is selected ON, what happens within the electrical system?

A

Essential buses are powered; and if inverter switches are selected on, fixed AC buses are powered

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2
Q

What is the function of the TRUs?

A

Converts variable frequency AC to DC

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3
Q

What is the function of inverters?

A

Converts 28VDC to 115V fixed freq AC

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4
Q

How many inverters are required to power the fixed AC system?

A

One

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5
Q

What precautions must be taken if only one inverter is operational?

A

Monitor the load on the operating inverter

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6
Q

What is the function of the BBPU?

A

Protects the DC generators and batteries from faults in the main feeder buses

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7
Q

How many selections are available for the Aux inverter?

A

Three

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8
Q

If we get a battery overtemperature do we manually isolate the battery?

A

Yes

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9
Q

Which lights are directly powered by the battery power bus (hot battery bus)?

A

Boarding lights and dome light

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10
Q

How many batteries does the aircraft have?

A

Two

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11
Q

What type of batteries does the aircraft have?

A

NiCad

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12
Q

What voltage should we see on the DC monitor with external power on?

A

28 Volts

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13
Q

Which buses will be powered with DC external power?

A

Left and right; Essentials, mains and secondary, all fixed AC if the inverter switches are selected ON.

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14
Q

What is the minimum battery voltage required for a battery powered engine start?

A

22 Volts

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15
Q

At what voltage does the overvoltage protection lock out DC external power?

A

31.5 Volts

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16
Q

What is the input and output power of the TRU?

A

115 VAC to 28 VDC

17
Q

How can the TRU be shutoff?

A

Pull the circuit breaker

18
Q

If a TRU fails, will both secondary buses be powered?

A

Yes, from the opposite secondary bus through a horizontal tie

19
Q

If both TRUs fail, will the secondary buses be powered?

A

Yes, both vertical ties from the main buses

20
Q

Will external DC power charge the battery? External AC?

A

No, unless there is a mod equipped

21
Q

Will the APU gen charge the battery?

A

Yes, with the main and auxiliary switches on

22
Q

Which buses are powered with the battery master and main batt switched on?

A

Both essentials, right main (fixed AC with inverters on)

23
Q

Which buses are powered with the battery master & main and aux battery switches on?

A

Both essentials, right main (fixed AC with inverters on)

24
Q

How do we get the battery power to the left main buses?

A

Main bus tie

25
Q

What is the primary purpose of the aux battery switch?

A

To allow for charge to the auxiliary battery

26
Q

Will the AC generators be online with the props in feather?

A

No

27
Q

A left AC bus or right AC bus caution light indicates a fault on which bus?

A

Respective variable AC

Q300 (3 decks)

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