The sequence of bus switching in the Electrical System SGR is for illustrative
purposes only  and is not meant to imply an approved procedure.
The Battery switch is on.

  • The hot battery busses are powered.
  • The battery bus is powered by the battery.
  • The DC Standby Bus is powered by the battery.
  • The AC Standby Bus is powered by the battery though the
    Static Inverter.
Ground Power is available.

  • Ground Power is not on the busses.

  • The Ground Service busses are powered through the ground
    service relays when the Ground Service Switch located at the
    Forward Attendant Panels is on.
The APU has been started and is available.
Forward Attendant Panel
Electrical System SGR
Select