Electrics

Question 1

How many volts and amps is the battery and where is the battery located?

Answer 1

The battery is 24 volts and 36 amps and is located in the right wing.

Question 2

How many generators are there, what voltage and what amperage are they?

Answer 2

There are two, 30 volt, 250 ampere generators. One generator can supply the entire electrical load.

Question 3

What does the generator drive during engine start and how many amperes

Answer 3

It drives the compressor section of the engine and initially draws 1100 amps and then drops to 300 amps

Question 4

For ground power, what do you need to have switched on?

Answer 4

The battery switch must be on to prevent transient voltage spikes.

Question 5

How many dual-fed buses are there?

Answer 5

There are four.

Question 6

What should you check before connecting external power?

Answer 6

The battery. It must be at least 20 volts. Anything below then you must charge or replace the battery.

Question 7

If the left load meter is on 30% in flight with no failures, what is the max deviation for the right load meter?

Answer 7

Min 20% max 40%

Question 8

What are the max generator load on the ground and in the air upto 33,000.

Answer 8

Max on the ground is 85% and 88% upto 33,000

Question 9

What power do the inverters provide?

Answer 9

The inverters provide 400 hertz AC, both 115 and 26 volts. They provide power for engine instruments and avionics.

Question 10

What does the hot batter bus provide power for?

Answer 10

Fire extinguisher system, firewall shut off valves, ground communications and batter relay.

Question 11

How does the distribution work?

Answer 11

Battery provides power to the main battery bus and main battery bus provides power to the LH and RH starter generators through the start relay. The MBB also provides for the isolation bus which then provides for the LH and RH Gen Bus through two 325 amp current limiters.

Question 12

How does power get from the LH and RH gen bus to the dual fed buses?

Answer 12

Through a 60 amp current limiter, a one way 70 amp diode and a 50 amp circuit breaker.

Question 13

How many volts and amps should a GPU supply?

Answer 13

28-28.4 volts, 1000 amps momentarily and 300 amps continuously

Question 14

What happens if the battery is exposed to more than 30 volts for longer than 2 minutes?

Answer 14

It will be damaged

Question 15

What are the starter limitations?

Answer 15

40 on, 60 off twice, then 40 on 30 minutes off.

Question 16

If the amber BATTERY CHG annunciator lights up in flight, what is the initial action on the checklist?

Answer 16

Turn the battery switch off.

Question 17

What is the individual generator rating?

Answer 17

28 volts, 250 amps

Question 18

If the BATTERY CHG light does not extinguish in flight when the battery control switch is off, what should you do?

Answer 18

Land at the nearest suitable airport

Question 19

After starting the right engine and right generator, what should the load meter decrease to before starting the left engine?

Answer 19

50% or lower