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for the left side bars, and the external power has priority for the right side bars).
‐ the external power B (if both external powers are connected, B has priority for the left side bars
and A has priority for the right side bars).
‐ the other side engine generator.
The APU generator or an external power may supply all the network.
One generators can supply all the network (with galley shedding in case of overload detection).
The generators cannot be connected in parallel (except on ground during No Break Power
Transfers).
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
ELECTRICAL
DESCRIPTION - OPERATIONS
Intentionally left blank
A330/A340 FLEET DSC-24-10-30-10 P 2/2
FCOM 19 AUG 10
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
ELECTRICAL
DESCRIPTION - OPERATIONS
A330/A340 FLEET DSC-24-10-30-20 P 1/6
FCOM 19 AUG 10
NORMAL CONFIGURATION
IN FLIGHT
Applicable to:
Each engine driven generator supplies its associated AC BUS (1.1, 1.2, 2.3, 2.4) via its Generator
Line Contactor (GLC 1 and GLC 2, GLC 3 and GLC4).
AC BUS 1.1 normally supplies the AC ESS BUS via a contactor.
AC BUS 1.2 supplies TR 1 which normally supplies DC BUS 1, DC BAT BUS.
AC BUS 2.3 supplies TR 2 which normally supplies DC BUS 2.
AC BUS 1.1 supplies ESS TR which normally supplies DC ESS BUS.
The two batteries are connected to the DC BAT BUS if they need charging. When they are fully
charged the Battery Charge Limiter disconnects them.
IN FLIGHT
Applicable to: ,
Each engine driven generator supplies its associated AC BUS (1 and 2) via its Generator Line
Contactor (GLC 1 and GLC 2).
AC BUS 1 normally supplies the AC ESS BUS via a contactor.
AC BUS 1 supplies TR 1 which normally supplies DC BUS 1, DC BAT BUS.
AC BUS 2 supplies TR 2 which normally supplies DC BUS 2.
AC BUS 1 supplies ESS TR which normally supplies DC ESS BUS.
The two batteries are connected to the DC BAT BUS if they need charging. When they are fully
charged the Battery Charge Limiter disconnects them.
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
ELECTRICAL
DESCRIPTION - OPERATIONS
A330/A340 FLEET DSC-24-10-30-20 P 2/6
FCOM 19 AUG 10
ON GROUND
Applicable to:
Either the APU generator or external power may supply the complete system (with some galley
shedding in case of overload).
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
ELECTRICAL
DESCRIPTION - OPERATIONS
A330/A340 FLEET DSC-24-10-30-20 P 3/6
FCOM 19 AUG 10
If external power A and external power B plus APU supply the complete system, the APU has priority
over external power B.
Situation then will be as displayed for case APU plus external power.
On ground, when only ground services are required, external power can supply the AC and DC
GND/FLT buses directly, without supplying the aircraft's entire network.
This configuration is selected via the MAINT BUS switch, located in the forward entrance area.
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
ELECTRICAL
DESCRIPTION - OPERATIONS
A330/A340 FLEET DSC-24-10-30-20 P 4/6
FCOM 19 AUG 10
ON GROUND
Applicable to: ,
Either the APU generator or external power may supply the complete system (with some galley
shedding in case of overload).
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
ELECTRICAL
DESCRIPTION - OPERATIONS
A330/A340 FLEET DSC-24-10-30-20 P 5/6
FCOM 19 AUG 10
If external power A and external power B plus APU supply the complete system, the APU has priority
over external power B.
Situation then will be as displayed for case APU plus external power.
On ground, when only ground services are required, external power can supply the AC and DC
GND/FLT buses directly, without supplying the aircraft's entire network.
This configuration is selected via the MAINT BUS switch, located in the forward entrance area.
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
ELECTRICAL
DESCRIPTION - OPERATIONS
A330/A340 FLEET DSC-24-10-30-20 P 6/6
FCOM 19 AUG 10
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
ELECTRICAL
DESCRIPTION - OPERATIONS
A330/A340 FLEET DSC-24-10-30-30 P 1/16
FCOM 19 AUG 10
ABNORMAL CONFIGURATION
ENGINE GENERATOR FAILURES
Applicable to:
ECMU provides automatic reconfiguration.
Complete network remains supplied provided at least two generators (including APU generator) are
available.
Some galleys are automatically shed.
Note: If a generator is lost due to overcurrent detection, reconfiguration does not occur and the
　
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