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P300 Systems Questions DDAL > Electrical > Flashcards

Electrical Flashcards

1
Q

How many batteries power the airplane?

A

2

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2
Q

What type of batteries are on the plane?

A

Lead-Acid

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3
Q

Where are the batteries located?

A 
#1 in the nose
#2 behind rt. wing root.
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4
Q

How many volts and amps for each battery?

A

24VDC

34 Ah and 36 Ah (48 with mod)

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5
Q

Which battery provides electrical power for engine starting?

A

2 battery

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6
Q

What is the minimum voltage for starting? Charging?

A

24 volts starting

27 volts charging

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7
Q

How many generators? Volts? Amps?

A

2 Generators
28 VDC
400 amps

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8
Q

What are the generator loads?

A

330A Ground and 390A Flight

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9
Q

What is the minimum battery temperature for normal operation?

A

-10C (-18C modified)

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10
Q

What function in the electrical system allows the engine to start without causing surges in the Avionics?

A

Quiet Start Contactor.

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11
Q

If a single generator fails in-flight, what happens?

A

Both SHED BUSES lose power.

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12
Q

What does it mean if the GPU is plugged in, but there is no GPU AVAIL light illuminated on the button?

A

DC power requirement from the GPU of between 25V and 29V is not being met.

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13
Q

What are we looking for when we push in the Electrical Emergency Button on the before taxi checklist?

A

That the batteries show at least 23.5 volts, three white lines.
(The generators continue to power the DC busses in this scenario, but certain other relays open in order to confirm battery voltage).

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14
Q

If the GPU is powering the airplane, when do the generators come on line?

A

When the GPU is disconnected (from the Central Bus) which can be confirmed on the electrical synoptic page.

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15
Q

If the GPU is connected and the Electrical Emergency Button is pushed in, what happens?

(What buses remain online)

A

The Batteries 1 and 2 will supply power to the HOT BATT BUSES, EMERGENCY BUS and the CENTRAL BUS.

Because the generators are not on-line yet, the electrical system is forced into electrical emergency, connecting the batteries directly to the emergency buss.

(The GLC 1, GLC 2, SBC 1 and SBC 2 will be commanded to open, and BTC 1 and BTC 2 will be hardwire locked out, EBC 1 will open and EBC 2 will close).

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16
Q

If a Dual Generator failure occurs in flight, what remains powered?

(What buses remain online)

A

The aircraft wiring logic will automatically configure the electrical emergency scenario.

Batteries 1 and 2 will supply power to the HOT BATT BUSES, EMERGENCY BUS and the CENTRAL BUS providing engine starting.

17
Q

If a Dual Generator failure occurs in flight, how long will battery power remain?

A

45 minutes max

18
Q

If while in flight, the CAS message ELEC XFR FAIL appears, what is the memory item and why is this procedure necessary?

A

ELEC EMER BUTTON…………PUSH IN

A complete in-flight loss of the main generating system has occurred, but the automatic transfer logic has failed to configure the electrical emergency condition, so pushing in the button allows the pilot to override the automatic transfer failure and enable the load shedding process by forcing the system into the electrical emergency condition.

19
Q

What is normally powered by Starter Generator 1?

A

SHED BUS 1
HOT BATT BUS 1
EMERGENCY BUS
DC BUS 1

20
Q

What is normally powered by Starter Generator 2?

A

SHED BUS 2
HOT BATT BUS 2
CENTRAL BUS
DC BUS 2

21
Q

Which battery provides electrical power for engine starting?

A

Battery 2

When a GPU is connected Battery 2 still provides power in parallel with the GPU for starting.

22
Q

On the ground, BATT 1 and BATT 2 n the ON position. Which busses are powered?

A 
Hot Batt Bus 1
Hot Batt Bus 2
Emergency Bus
DC Bus 1
DC Bus 2
Central Bus
23
Q

What is acceptable GPU amperage range?

A

400 A - 1000 A

24
Q

Which busses are powered by BATT 2 during engine start?

A

Hot Batt Bus 2
Central Bus
Engine Starter

25
Q

Which busses are powered by Batt 1 during an engine start?

A

Hot Batt Bus 1
Emergency Bus
DC Bus 1
DC Bus 2 ( via quiet start contactor)

P300 Systems Questions DDAL (15 decks)

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