Flashcards
Electrics
Flashcards do conjunto (81)
- 1what is the voltage of the electrical system28 v dc
- 2what is the voltage and type of the main batteries24vdc nicad batteries x 3
- 3how many generators are in the system5
2 dc
2 ac
1 apu - 4how many trus are in the system2
- 5EPCUelectrical power control unit
- 6EPGDSelectrical power generation and display system
- 7what is the EPCUs role (4)monitor
reconfigure
communicate with the ESID
activate warning and cautionary light - 8What can be said about the generator switcheswe never turn them off
- 9what is the purpose of the ESID panelto represent different pages on the MFD
- 10What does the - meanits discharging
- 11what does no sign meanits charging
- 12what does + meanits over charging
- 13what does +1.2its over charging but 120% overloaded
- 14what must you do when the voltage is less than 27.5 VDCturn the batteries off
- 15what is the minimum for a gpu/apu start26 VDC
- 16whats the minimum for a Main/Ess bus power up23 VDC
- 17what is the minimum for a battery start22V
- 18what is the max battery load for engine start0.4
- 19what is the max battery load for takeoff0.1
- 20what does this 0.1 ensurethat you have 45 mins battery power on takeoff
- 21what is the minimum battery temperature for take off-20 C
- 22when are the L and R ESS buses tiedPERMENANTLY TIED
- 23What does the battery master connectthe Battery to the Ess Bus
- 24what is the avionics bus normally powered bythe Left ESS bus
- 25what can the Avionics bus also be powered byThe main or standby battery
- 26what is the purpose of Battery Switchesthey connect the batteries to the MAIN buses for the purpose of charging
- 27when is the battery master turned onbefore the batteries
- 28when are the main Buses tiedonly for start up and shutdown
- 29When will the battery heat indication be whitebelow 50C
- 30when will the battery heat indication turn yellow?50C to 65C inclusive
- 31when will the battery heat indication turn redabove 65 C
- 32What will happen if the battery temperature exceeds 71 Chot batt WARNING on CWP will illuminate
- 33what can be said about the HOT BATT BUSIt is always live
- 34what does the hot batt bus power-clocks
-refuelling panel and associated SOVs
-boarding lights
-FLT DCK emergency dome lights
-pa when emergency lights are activated
-Batt Master
-Fire extinguishing squibs
-Hydraulic and Fuel SOVs - 35??? what does the HOT BATT bus form part ofthe R Ess bus
- 36Where are the hot batt bus circuit breakers foundthe R ESS CB panel marked battery power
- 37what does the Avionics Bus powerISI
Standby compass lights
VHF1
Storm lights - 38ISIintegrated standby unit
- 39What do the DIODES preventthe standby battery and main ess buses from feeding the main feeder buses
- 40what happens to the voltage between the ESS and MAIN busesthere's a 0.7 drop due to the diodes
- 41GCUgenerator control unit
- 42what parts of the electrical system have GCUsBoth DC GENS
APU GEN
DC EXTERNAL PWR - 43What do the secondary buses powerthe non essential DC services
- 44if you only have one generator functioning what will happenit will load shed the secondary buses
- 45what does the AC power (5)ice protection
galleys
AUX fuel pumps
SPU (standby power unit)
TRUs - 46what type are the AC gensEngine driven
- 47what are the AC gens connected tovariable frequency 115 V buses through switches on the AC panel
- 48what is required to power the entire electrical system1 ac generator
- 49where are the stater generators mountedon the accessory gearbox of each engine
- 50what can the generators also act asstarter motors
revert to generator operations once started - 51what do the GCU protect against/ regualte to28.5 VDC
over current
over voltage and undervoltage - 52how are the DC generators cooledair cooled
- 53where are the AC Gens drivenfrom the RGB
- 54what happens at 200 rpmstart/ fx
- 55what happens at 400 rpmac gens come online
- 56what happens at 660 rpmidle prop
- 57what do the ac gen GCUs regulate to115 V AC average over 3 phase
- 58how are the AC GENS cooledoil cooled
- 59how many oil systems does the AC haveonly 1
- 60what is the amperage of the TRU300 amps
- 61where are the TRUsin the nose compartment
- 62how are the TRUs cooledair cooled
- 63where does the GPU connectL main dc bus
- 64what is the voltage of the GP27 V
- 65what amperage is the GPU limited to1000 A
- 66between what voltage is the EPCU protected22-31 V
- 67what is the APU power inhibited byDC EXT PWR
- 68where is the APU gen monitoredon the MFD ELEC page
- 69when are the ESS buses poweredwhen the batt master is on
- 70when are the main buses poweredwhen the main and aux battery are on
- 71when is the secondary bus poweredwhen both DC gens are on
- 72what happens when you get a TRU failureSEC BUS TIE CONTACTOR CLOSES
- 73What does the EPCU do in the event of a DC bus failureisolates it
monitors it for 5 seconds for transient faults
if still transient fault detected, will cut all power to that side of the system - 74what 4 cautions can you expect to see if you have a L DC Bus faultAUX BATT
STBY BATT
DC BUS
#1 DC GEN - 75what 3 cautions can you expect if you get a R DC bus faultmain batt
#2 DC gen
DC BUS - 76how can you spot of the EXTERNAL POWER has gone offthe recirc fan will go off
cabin toliet lights will go out - 77what indications do you get on the FLT DCK for a secondary bus faultno indications
- 78what will the EPCU do in the event of a secondary bus faultit will isolate the system, blow the TRU CBs
cuts side tie breaker closes bottom tie breaker to see if its a problem with the TRU or if a problem with the secondary bus then monitors for 7 seconds
if still a fault will blow the fuse to isolate completely - 79when are battery essential services usedif generator power is lost, and at least one TRUs fail
an unknown source of smoke - 80what are the switch movements for battery essential servicesbattery master on
batteries off - 81—
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- TYPE RATING DASH 8 Q400 FlashCards sobre Electrics, criado por Ella Davies em 12-05-2019.
- Criado por
- Ella Davies
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