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Dash 8 Q-200 AMO > Electrical System > Flashcards

Electrical System Flashcards

1
Q

What buses are powered when the BATTERY MASTER is selected on?

A

Left and Right Essential

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2
Q

What buses are powered when BATTERY MASTER and MAIN BATTERY switch are selected on?

A

Left and Right Essential and Right Main

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3
Q

What buses are powered when the BATTERY MASTER, MAIN BATT, and AUX BATT switches are selected on?

A

Left and Right Essential and Right Main

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4
Q

With the BATT MASTER, MAIN and AUX BATT switches on, what must be selected to power the left main bus?

A

MAIN BUS TIE

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5
Q

When do the AC generators come on line?

A

Engine running and condition levers in the MIN to MAX range

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6
Q

What buses are powered the APU generator powered?

A

All DC Buses

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7
Q

What buses are owered with the DC external power?

A

All DC Buses

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8
Q

What will happen if the DC External power voltage exceeds 31.5 volt?

A

DC External power is automatically disconnected from the system

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9
Q

What buses are powered with the AC external power?

A

All AC and DC buses

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10
Q

What controls the 4 bus ties?

A

DC Logic

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11
Q

What is the maximum DC generator load, ground and in flight?

A

0.7 ground and 1.0 in flight

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12
Q

What is the purpose of the TRU’s?

A

Convert 3 phase 115 volt variable frequency AC to 28 volt DC

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13
Q

What is the maximum TRU load?

A

200 amp each

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14
Q

What is the minimum TRU voltage?

A

25 volts, below 18 volts caution light indicates a TRU failure

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15
Q

What is the maximum AC generator load ground or in flight?

A

Temps below 10 C is 1.0 and above 10 C limited to .33

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16
Q

What does a battery load indication of +1.05 indicate?

A

Overcharging by 5% over maximum charge rate

17
Q

What is the maximum output rating of the DC generators?

A

300 amps

18
Q

What is the maximum output rating of the TRUs

A

200 amps

19
Q

When does the BBPU - Breaker Bar Protection Unit react to a main bus fault?

A

High generator output over 450 amps

20
Q

What does the BBPU do when it detects a main bus fault?

A

Opens the ties and isolates the affected bus

21
Q

How many inverters are there?

A

three

22
Q

What is the purpose of the inverters?

A

Converts 28 volt DC to 115 volt single phase AC

23
Q

What are the step down transformers for?

A

Convert 115 V AC to 25 V AC

24
Q

What is the indication of a failure of the 26 V AC or the 115 V AC bus?

A

Caution light illuminates for 26 V AC but no indication for the 115 V AC failure

25
Q

What will happen if an inverter fails?

A

Parallel control box disconnects failed inverter and related caution light comes on and the remaining inverters provide necessary power

26
Q

What is the indication of a fault on the battery temperature display sensor and the over temperature sensor?

A

Amber light comes on at the 60 degree point, over temperature SENSOR FAIL light comes on

27
Q

Will all buses be powered if DC generator fails?

A

Yes, DC Logic closes appropriate (Main) bus tie

28
Q

Will all buses be powered if both DC generators fail?

A

Yes, DC Logic closes appropriate bus ties and power comes through the TRUs

29
Q

What action should be taken as per the QRH with a double DC generator failure?

A

1 and 2 Generator Reset, Batteries off, Master off, Land as soon as possible

30
Q

What will occur if a subsequent TRU fails after losing both DC generators?

A

Total power failure, loss of cabin pressurization, battery on, descend and land as soon as possible

31
Q

Will all buses be powered if a TRU fails?

A

Yes, DC Logic closes appropriate bus ties

32
Q

Will all buses be powered if both TRUs fail?

A

Yes, DC Logic closes appropriate bus ties

33
Q

Will all buses be powered if an AC generator fails?

A

Yes, Other AC Gen takes up the load

34
Q

Which battery is the Hot battery bus connected to?

A

Main (Right) Battery

35
Q

Can the BBPU disconnect the main bus tie if the main bus tie switch is on?

A

Yes

Dash 8 Q-200 AMO (22 decks)

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