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A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
ELECTRICAL
DESCRIPTION - GENERAL
A330/A340 FLEET DSC-24-10-10 P 1/4
FCOM 19 AUG 10
GENERAL
Applicable to:
The electrical power system consists of a three phase 115/200 V 400 Hz constant-frequency AC
system and a 28 V DC system.
Electrical transients are acceptable for equipment.
Commercial supply has secondary priority.
Normally, the system produces alternating current, some of which it then transforms into direct
current for certain applications.
At least two generators are required to supply all electrical bus bars.
If all normal AC generation is lost, an emergency generator can supply AC power.
If all AC generation is lost, the system can transform DC power from the batteries into AC power.
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
ELECTRICAL
DESCRIPTION - GENERAL
A330/A340 FLEET DSC-24-10-10 P 2/4
FCOM 19 AUG 10
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
ELECTRICAL
DESCRIPTION - GENERAL
A330/A340 FLEET DSC-24-10-10 P 3/4
FCOM 19 AUG 10
GENERAL
Applicable to: ,
The electrical power system consists of a three phase 115/200 V 400 Hz constant-frequency AC
system and a 28 V DC system.
Electrical transients are acceptable for equipment.
Commercial supply has secondary priority.
Normally, the system produces alternating current, some of which it then transforms into direct
current for certain applications.
Each of the aircraft’s three generators can supply the whole network.
If all normal AC generation is lost, an emergency generator can supply AC power.
If all AC generation is lost, the system can transform DC power from the batteries into AC power.
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
ELECTRICAL
DESCRIPTION - GENERAL
A330/A340 FLEET DSC-24-10-10 P 4/4
FCOM 19 AUG 10
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
ELECTRICAL
DESCRIPTION - GENERATION OF ELECTRICAL POWER
A330/A340 FLEET DSC-24-10-20-10 P 1/4
FCOM 19 AUG 10
AC GENERATION
MAIN GENERATORS
Applicable to:
Four three-phase AC generators (GEN1, GEN2, GEN3 and GEN4), driven by the engine through an
integrated drive, supply aircraft electrical power. Each generator can supply up to 75 KVA of three
phase 115/200 V 400 Hz power.
A fifth generator (APU GEN), driven directly by the APU and producing up to 115 KVA of three phase
115/200 V400 Hz power can replace one or more main engine generators at any time.
A generator control unit (GCU) controls the output of each generator. The main functions of each
GCU are :
Control the frequency and ‐ voltage of the generator output.
‐ Protect the network by controlling the associated generator line contactor (GLC).
MAIN GENERATORS
Applicable to: ,
Two three-phase AC generators (GEN1, GEN2), driven by the engine through an integrated drive,
supply aircraft electrical power. Each generator can supply up to 115 KVA of three phase 115/200 V
400 Hz power.
A third generator (APU GEN), driven directly by the APU and producing up to 115 KVA of three
phase 115/200 V400 Hz power can replace one or more main engine generators at any time.
A generator control unit (GCU) controls the output of each generator. The main functions of each
GCU are :
Control the frequency and ‐ voltage of the generator output.
‐ Protect the network by controlling the associated generator line contactor (GLC).
EXTERNAL POWER
Applicable to: ALL
Two ground power connectors near the nose wheel allow ground power to be supplied to all bus
bars (with some galleys shed in case of overload). Two ground power units (90 KVA max each) can
supply the aircraft.
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
ELECTRICAL
DESCRIPTION - GENERATION OF ELECTRICAL POWER
A330/A340 FLEET DSC-24-10-20-10 P 2/4
FCOM 19 AUG 10
A Ground Power Control Unit (GPCU) :
‐ Protects the network by controlling the external power contactor.
　
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