Electrical System

Question 1

Alternator 1

Answer 1

SR20G6: Gear driven 28 V 100 amp on right front of engine

SR22: Gear driven 28 V 100 amp on right front engine

Question 2

Alternator 2

Answer 2

SR20G6: Belt Driven 28.75 Volt 70 amp on front left of engine

SR22: Belt Driven 28.75 Volt 70 amp on left front of engine

Question 3

What happens if you turnoff the alternators and then lose battery power

Answer 3

alternators are not self starting and require battery power to do so

alternators would not be able to be turned back on

Question 4

Battery 1

Answer 4

24 Volt / 10 Amp-hour

mounted on on right firewall

Question 5

Battery 2

Answer 5

two 12 volt / 7 amp-hour battery

connected in series to provide 24 volts

located in vented acid resistant container mounted behind aft cabin bulkhead below parachute canister

Question 6

Master Control Unit

Answer 6

located on left firewall

controls Alt 1, Alt 2, starter, landing light, external power

also provides alternator over voltage protection

Question 7

Transient Voltage Suppressors

Answer 7

installed in key areas of the electrical system to protect from lightning strikes

allows energy from lightning to dissipate though semi-conducting pathways to ground

Question 8

If you lost Alt 2, what annunciators would you see

Answer 8

Yellow Alt 2

Question 9

If you lost Alt 1, what would you see

Answer 9

Yellow Alt 1

M BUS 1

Bat 1

Question 10

When do you see a M BUS CAS message

Answer 10

when M Bus voltage drops to battery voltage

below approx. 24.5 volts

Question 11

If both alternators fail, what CAS annunciators would you see

Answer 11

Yellow Alt 1

Yellow Alt 2

M Bus 1

M Bus 2

Red Ess Bus and Yellow Bat 1

Question 12

If both alternators fail, why does Bat 1 power the MBus’s and Bat 2 power the essential bus when their voltages are the same?

Answer 12

because you lose 1v when current traverses a isolation diode, so Bat 2 has a apparently higher voltage because it does not have to cross any diodes to reach essential bus

Question 13

How long will the Bat’s last if alternators fail

Answer 13

Bat 1 approx 15 minutes

Bat 2 approx 45 minutes

Question 14

At what voltage would the voltage regulator provide over voltage protection and shut down a particular alternator

Answer 14

31.75 volts

approx 3 volts above normally regulated output

Question 15

What components are on the constant power bus

Which battery is the constant power bus connected to

Answer 15

CAPS, ELT, Convenience Lights

Bat 1

*CAPS actually can receive power from both batteries

Question 16

Turning on Bat 2 turns on which Busses

Answer 16

Essential Bus 1 and then Essential Bus 2

Question 17

Components on Essential Bus 1

Answer 17

GPS Nav GIA 1
Com 1
ADAHRS 1
STDBY ATTD A
PFD A

Question 18

Components on Essential Bus 2

Answer 18

Engine Instruments
Stall Warning
Roll Trim
Pitch Trim

Question 19

Turning on Bat 1 powers what

Answer 19

M Bus 1 and M Bus 2

Starter relay if key is in start position

Question 20

What components are powered by Main Distribution Bus 1

Answer 20

landing lights
yaw servo
EVS camera
12v and USB power
MFD
AC condensor
Cabin Fan

Question 21

What components are powered by Main Distribution Bus 2

Answer 21

everything else

Avionics Bus and Non-essential Bus

Question 22

When you turn on the avionics switch, which components nor receive power

Answer 22

DME/ADF
Audio Panel
Data Link / Weather
Xponder
Traffic

Question 23

What components are on the Non-Essential Bus

Answer 23

Avionics Fan
Nav Lights
Strobe Lights
Pitot Heat
Flaps
Stall Vane Heat