Electrical Flashcards
How many IDG’s are required to power the entire aircraft?
1
If an electrical overload is detected while using a single IDG in flight
galleys C&D and AC Main bus #2 will shut down. IF there is still an overload, then galleys A&B and AC Main buts #1 will shed, followed by the IFE.
The four sources of electrical power for the B737-700 are
The engine-driven integrated drive generators, the APU integrated drive Generator, the battery, and ground power.
The integrated drive generators provide
115VAC at 400Hz
Which AC bus fed by AC transfer Bus #1 has no equivalent in the circuits fed by AC transfer Bus #2
AC Standby Bus
In a normal ground configuration at a major airport, which AC bus is used to start the APU?
The APU is Started either by the battery or through the Battery charger on AC Ground Service Bus #2
Which busses supply electrical power to the AC Packs?
AC Transfer Busses
External ground power, once connected to the aircraft, may be selected
from the flight attendant forward panel.
What type of electrical components acts as a ‘check valve’, only allowing a one-way flow of current?
Diode
What items are powered by the Hot Battery Bus?
APU, Fire Detection and Extinguishing, Fuel Control Panel, And shutoff valves, and Captain’s clock.
The battery charger receives AC power from
Ac Ground service Bus #2
In the MEL, electrical power components will be found in
chapter 24
The battery supplies
24 VDC
T/R #3
Normally receives AC from AC transfer bus #2 and supplies DC power to the Battery Bus.
How many T/R’s are required to supply all DC Busses?
2
