Electrical

Question 1

Components of the electrical system

Answer 1

Starter Generator
Generator
Battery
EPS
Inverters
Busses
GPU

Question 2

Generator 1 stats

Answer 2

28v/300a

Question 3

What primary function does gen 1 provide?

Answer 3

Starter generator (-45 AC)

Question 4

What busses are powered by gen 1?

Answer 4

Gen 1
Gen 1 bus
Avionics 1/2
Battery
Standby
Non Essential bus

Question 5

Gen 2 stats

Answer 5

28v/115a

Question 6

Can Gen 2 carry the entire AC electrical load?

Answer 6

No

Question 7

What busses does Gen 2 provide under normal conditions?

Answer 7

Gen 2 bus
Addl battery (if installed)

Question 8

What maintains constant loads and voltage for the generators in normal ops?

Answer 8

GCU (Gen control units)

Question 9

What does the auxiliary DC system power?

Answer 9

6 cabin outlets for pax use

Question 10

Battery stats

Answer 10

24v/40a

Question 11

What can the battery power and for how long?

Answer 11

Essential avionics for 30 minutes below 50a and 20 minutes below 60a

Question 12

EPS stats

Answer 12

24v DC/5a

Question 13

What is the GPU set to when connected?

Answer 13

800-1000a

Question 14

What inverter is operating when the overhead switch is set to Batt?

Answer 14

Gen 1

Question 15

What inverter is operating when the overhead switch is set to Gen 1?

Answer 15

2

Question 16

Gen 1 max load

Answer 16

300a or 450a @ 2 min/hour

Question 17

Light switch on stairs is on what bus?

Answer 17

Hot battery bus

Question 18

Where are the autopilot CBs located?

Answer 18

Avionics bus 2, co pilots panel

Question 19

Where are the pitch trim servo CBs located?

Answer 19

Stab trim…batt bus, pilots side

Question 20

What do red/amber CAWS bus messages indicate?

Answer 20

Low voltage at the bus

Question 21

Amber battery CAWS message means….

Answer 21

60+ amp draw on the battery

Question 22

What does green AVAIL light indicate on the GPU button?

Answer 22

28v available

Question 23

What prevents the AC generators from connecting to the system at the same time GPU is connected?

Answer 23

Generator disconnect relay

Question 24

Which CBs may be reset once while inflight?

Answer 24

Battery bus
Avionics 1
26 VAC

Question 25

What are the conditions of resetting a CB inflight?

Answer 25

Only once
Wait one minute from trip
No burning smell

Question 26

What happens in the system when Gen 1 fails?

Answer 26

Gen 2 BTB closes
Non ESS BTB opens

Question 27

What major systems are on the non-essential bus?

Answer 27

Landing gear
Anti ice

Question 28

How would you lower the gear with a Gen 1 failure?

Answer 28

Non essential bus switch to override