Electrical System Flashcards
How many batteries power the airplane?
Two
What type of batteries does the Phenom have?
Lead-Acid
Where are the batteries located on the Phenom?
1 in the nose; #2 on the right side aft of the wing
How many volts and amps for each battery?
24v DC; 34 Ah in the nose and 42 Ah in the aft battery
What is the minimum battery voltage for starting the engine? Minimum for charging the battery?
24 volts to start and 27 volts to charge
Which battery provides electrical power for starting the engine?
2 battery (42 Ah)
How many generators does the airplane have? How many volts and amps per each generator?
Two (one per engine); 28v DC power and 400 amps
What are the generator loads?
330 Amp on the ground; 390 Amp in flight.
What is the minimum battery temperature for normal operation?
-10C (14F)
What is the function in the electrical system that allows the engine to start without causing surges in the avionics?
Quiet start contactor
If a single generator fails inflight, what happens?
Both SHED BUSSES lose power.
What does it mean if the GPU is plugged in, but there is no AVAIL light illuminated on the button?
DC power requirements from the GPU of between 26 v and 29v is not being met.
What are we looking for when we push in the Electrical Emergency Button on the after start checklist?
That the batteries show at least 23.5 volts and the three white lines that isolate the batteries from the busses to confirm this voltage.
If the GPU is powering the airplane, when do the generators come on line?
When the GPU is disconnected from the central bus.
If the GPU is connected and the Electrical Emergency Button is pushed in, what happens?
The electrical system is forced into electrical emergency (no generators online). This connects the batteries directly to the emergency bus. Only the HOT BATT BUS, EMER BUS, and the CENTRAL BUS will be powered and the airplane will default to all left side of the cockpit stuff.
If there is a dual generator failure inflight, what remains powered?
Airplane will go into “emergency power” scenario. HOT BATT BUS, EMER BUS, and CENTRAL BUS will all be powered by the batteries.
How long will the battery operate in the “electrical emergency” scenario?
45 minutes maximum
If inflight, the EICAS message “ELEC XFR FAIL” appears, what is the initial action (formerly a memory item) and why do we have to do it?
ELEC EMER BUTTON…….PUSH IN; an inflight loss of the main electrical system has occured and the automatic transfer has failed to get to the electrical emergency set-up. Pushing the button forces the airplane into electrical emergency.
What is normally powered by starter generator 1?
DC BUS 1, SHED BUS 1, HOT BATT BUS 1, and EMER BUS
What is normally powered by starter generator 2?
DC BUS 2, SHED BUS 2, HOT BATT BUS 2, and CENTRAL BUS
