Electrical

Question 1

How many batteries power the airplane?

Answer 1

2

Question 2

What type of batteries are on the plane?

Answer 2

Lead-Acid

Question 3

Where are the batteries located?

Answer 3

#1 in the nose
#2 behind rt. wing root.

Question 4

How many volts and amps for each battery?

Answer 4

24VDC

34 Ah and 36 Ah

Question 5

Which battery provides electrical power for engine starting?

Answer 5

2 battery

Question 6

What is the minimum voltage for starting? Charging?

Answer 6

24 volts starting

27 volts charging

Question 7

How many generators? Volts? Amps?

Answer 7

2 Generators
28 VDC
400 amps

Question 8

What are the generator loads?

Answer 8

330A Ground and 390A Flight

Question 9

What is the minimum battery temperature for normal operation?

Answer 9

-10C

Question 10

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

Answer 10

Quiet Start Contactor.

Question 11

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

Answer 11

Both SHED BUSES lose power.

Question 12

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

Answer 12

DC power requirement from the GPU of between 26V and 29V is not being met.

Question 13

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

Answer 13

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

Question 14

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

Answer 14

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

Question 15

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

(What buses remain online)

Answer 15

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).

Question 16

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

(What buses remain online)

Answer 16

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.

Question 17

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

Answer 17

45 minutes max

Question 18

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

Answer 18

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.

Question 19

What is normally powered by Starter Generator 1?

Answer 19

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

Question 20

What is normally powered by Starter Generator 2?

Answer 20

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

Question 21

Which battery provides electrical power for engine starting?

Answer 21

Battery 2

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