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 is on.
The APU has been started and is available.
Forward Attendant Panel
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Electrical System SGR