Electrical System

Question 1

What is indicated by the 400 cycle light?

Answer 1

Loss of 26VAC, not necessarily a loss of an inverter.

Question 2

If all AC components are working and the 400 cycle light is on, what could it indicate?

Answer 2

Popped 400~ circuit breaker (fuse)

Question 3

The 400 cycle light itself is powered by what bus?

Answer 3

DC bus of the opposite side

Question 4

When the inverter is switched to EMER, what is happening?

Answer 4

The EMER bus side is now powered by the side switched to NORMAL.

Question 5

How is are the AC avionics powered?

Answer 5

The Avionics transformer uses system 115 VAC and converts it to 26VAC.

This also powers the AHRS in the G600.

See the avionics fuses.

Question 6

Where are the current limiters on the otter?

Answer 6

Three above the third aisle seat and 3 in the battery box.

Question 7

What are the current limiters?

Answer 7

Slow burning fuses that melt if during battery overcharging for prolonged periods.

Question 8

How will a melted current limiter after operations?

Answer 8

Loss of a current limiter will reduce the amperage to and from the battery.

Question 9

How can you detect a melted current limiter?

Answer 9

Either on the next start or if power loss after generators are turned off.

Question 10

What is the purpose of the distribution breakers?

Answer 10

Prevents total failure of the entire bus by isolating the fault.

Question 11

Where is are the distribution breakers?

Answer 11

Next to their associated fuse panel.

Question 12

What happens when a distribution breaker pops?

Answer 12

Power will still be available to the bus but current is limited.

Question 13

What do you do when the distribution break pops?

Answer 13

NEVER reset it.

Question 14

Where is the voltage regulator?

Answer 14

On the forward starboard side of the baggage compartment.

Question 15

What are you testing when you check the load and volts?

Answer 15

The equalizing circuit of the voltage regulator.

Question 16

What does the Generator Light indicate?

Answer 16

An open Reverse Current Relay or generator failure.

Question 17

Where is the reverse current relays?

Answer 17

Above the right side of aisle 3.

Question 18

What is above the right seat in aisle 3?

Answer 18

Reverse Current Relay,
Bus Tie Relay
and 3 Current Limiters

Question 19

What prevents ground power from charging the batteries?

Answer 19

The External Power Relay

Located under the baggage floor.

Question 20

You have two generator lights on…how much electrical power do you have remaining?

Answer 20

20 minutes

Question 21

What will happen if you have a dual generator failure and you open the bus tie?

Answer 21

Only the right generator light will now remain on.

The battery is powering the light on the left bus only.

Question 22

Where is the generator reset breaker?

Answer 22

In the nacelle

Continuing to reset the generator will not do anything.

Question 23

How long will the backup Attitude indicator last with a loss of power?

Answer 23

10 hours

Remember, you can still fly with it on 56 and 46 (has airspeed and altimeter).

Question 24

When turning off the left bus to isolate a fire, what important step should you remember?

Answer 24

Turn off the Battery switch too.

Question 25

What you should stop and think about first with an electrical fire?

Answer 25

What systems are no longer working?

Question 26

What does the scientific power override switch do?

Answer 26

Prevents automatic load shedding if a generator is lost.