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reactivated after slats retraction via the MAN ON pushbutton.
‐ On the ground : after engine 1 and 4 shutdown.
The EMER GEN TEST pushbutton enables the activation of the emergency generator, and its
connection to the essential network. This test is inhibited when the slats are extended.
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
ELECTRICAL
DESCRIPTION - OPERATIONS
A330/A340 FLEET DSC-24-10-30-30 P 9/16
FCOM 19 AUG 10
�� If the green hydraulic system, which actuates the emergency generator, is powered by an
engine-driven pump , the emergency generator supplies the :
‐ AC ESS BUS,
‐ AC ESS SHED.
And, through the ESS TR, the :
‐ DC ESS BUS,
‐ DC ESS SHED.
�� If the green hydraulic system is powered by the Ram Air Turbine , the emergency
generator supplies the :
‐ AC ESS BUS,
‐ DC ESS BUS, through the ESS TR.
All LAND RECOVERY AC and DC BUS bars are shed. They are recovered when the LAND
RECOVERY pushbutton is ON.
The AC ESS GND is lost.
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
ELECTRICAL
DESCRIPTION - OPERATIONS
A330/A340 FLEET DSC-24-10-30-30 P 10/16
FCOM 19 AUG 10
EMERGENCY GENERATION AFTER LOSS OF ALL MAIN GENERATORS
Applicable to: ,
If both, AC1.1 and 2.4, are lost and if the engines 1 and 4 are lost, the Ram-Air Tubine (RAT)
extends automatically.
If only powered by the RAT, the EMER GEN is inhibited when slats are extended.
The emergency generator can be manually activated through the MAN ON pushbutton.
Emergency generator deactivation occurs only automatically :
In flight : At slats extension ; if only powered by the RAT ‐ (engines 1 and 4 lost), it can be
reactivated after slats retraction via the MAN ON pushbutton.
‐ On the ground : after engine 1 and 4 shutdown.
The EMER GEN TEST pushbutton allows to activate the emergency generator and to connect it to
the essential network. This test is inhibited when the slats are extended.
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
ELECTRICAL
DESCRIPTION - OPERATIONS
A330/A340 FLEET DSC-24-10-30-30 P 11/16
FCOM 19 AUG 10
�� If the green hydraulic system, which actuates the emergency generator, is powered by an
engine-driven pump , the emergency generator supplies the :
‐ AC ESS BUS,
‐ AC ESS SHED.
And, through the ESS TR, the :
‐ DC ESS BUS,
‐ DC ESS SHED.
�� If the green hydraulic system is powered by the Ram Air Turbine , the emergency
generator supplies the :
‐ AC ESS BUS,
‐ DC ESS BUS, through the ESS TR.
All LAND RECOVERY AC and DC BUS bars are shed. They are recovered when the LAND
RECOVERY pushbutton is ON.
The AC ESS GND is lost.
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
ELECTRICAL
DESCRIPTION - OPERATIONS
A330/A340 FLEET DSC-24-10-30-30 P 12/16
FCOM 19 AUG 10
FLIGHTWITH BATTERIES ONLY
Applicable to:
When emergency generator is not available, the batteries supply :
‐ the DC ESS BUS
‐ the DC LAND RECOVERY (whatever the LAND RECOVERY pushbutton position is)
and through the STAT INV :
‐ the AC ESS BUS
the AC LAND RECOVERY (whatever the LAND RECOVERY ‐ pushbutton position is)
The AC ESS SHED, the DC ESS SHED and the SHED LAND RECOVERY are not supplied.
The AC ESS GND is lost.
Example : flight with batteries only.
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
ELECTRICAL
DESCRIPTION - OPERATIONS
A330/A340 FLEET DSC-24-10-30-30 P 13/16
FCOM 19 AUG 10
FLIGHTWITH BATTERIES ONLY
Applicable to: ,
When emergency generator is not available, the batteries supply :
‐ the DC ESS BUS
‐ the DC LAND RECOVERY (whatever the LAND RECOVERY pushbutton position is)
and through the STAT INV :
‐ the AC ESS BUS
‐ the AC LAND RECOVERY (whatever the LAND RECOVERY pushbutton position is)
The AC ESS SHED, the DC ESS SHED and the SHED LAND RECOVERY are not supplied.
The AC ESS GND is lost.
Example : flight with batteries only.
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
ELECTRICAL
DESCRIPTION - OPERATIONS
A330/A340 FLEET DSC-24-10-30-30 P 14/16
FCOM 19 AUG 10
ON GROUND, BATTERIES ONLY
Applicable to:
Provided they are both selected AUTO, batteries supply the :
‐ DC ESS BUS
‐ DC BAT BUS
‐ DC LAND RECOVERY (whatever the position of the LAND RECOVERY pushbutton)
And, through the static inverter, the :
‐ AC ESS BUS, and
‐ AC ESS GND
‐ AC LAND RECOVERY (whatever the LAND RECOVERY pushbutton position is)
　
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