Electrical Sysytem Flashcards
What is the electrical system’s voltage?
28 VDC and 26 VAC
What is battery’s voltage and capacity?
24 Volts with 40 Amp-hours
What is GEN 1 capacity?
300amps, 450amps for 2mins per hour.
What is GEN 2 capacity?
115amps.
What is the maximum battery current drain, causing yellow EIS annunciator to light up?
60amps.
How long will the battery power aircraft at 50A drain?
30mins.
How long will the battery power aircraft at 60A drain?
20mins.
What is the minimum battery voltage for engine start? (battery start)
24 VDC.
What kind of AC system does PC12 have?
26 VAC and 115 VAC at 400hz (115 not used)
What should GPU be rated at to run avionics and for engine start?
27-30 VDC
500A to run avionics
1000A to have engine start
When do Bus CAWS lights trigger?
When below 18 V
When does GEN 2 tie close?
When GEN 1 fails
When does Bus tie open?
GEN 1 BUS current draw exceeds 200.
What are the starter cycle limits?
30 on, 60 off, 30 on, 30mins off
Which battery offers better repeated starting properties?
NiCad
Which battery has a potential for overheating and thermal runaway?
NiCad
At what Gen 1, Gen 2 or BAT voltage will EIS begin to indicate over-voltage?
29.5 V
At what Bat current will EIS begin to indicate battery overcharge?
Continuous increase above 10 A in 7 secs
DC Amps Battery EIS limitation:
below -60amps (caution range, amber)
Continuous increase above 10 amps every 7 seconds (warning range, red) OVERCHARGE
DC Volt battery caution range:
Below 22.0 V after 3 seconds
Above 29.6 V
DC Amps GEN 2 caution range:
Above 140 Amps (no red range)
DC Volt GEN 1 caution range:
Below 22.0 V after 2 seconds
Above 31.5 V
OAT EIS caution:
Below 4 degrees and probe de-ice switched off
