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The system automatically replaces the failed generator, with the :
‐ APU GEN, if available, or
‐ Other engine generator (automatically shedding part of the galley load).
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
ELECTRICAL
DESCRIPTION - OPERATIONS
A318/A319/A320/A321 FLEET DSC-24-10-30-30 P 2/22
FCOM 19 AUG 10
FAILURE OF ONE ENGINE GENERATOR
Applicable to: ,
, MSN,,
The system automatically replaces the failed generator, with the :
‐ APU GEN, if available, or
‐ Other engine generator (automatically shedding all of the galley load).
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
ELECTRICAL
DESCRIPTION - OPERATIONS
A318/A319/A320/A321 FLEET DSC-24-10-30-30 P 3/22
FCOM 19 AUG 10
FAILURE OF AC BUS 1
Applicable to:
‐ AC BUS 2 can supply AC ESS BUS, and ESS TR can supply DC ESS BUS, both via the AC ESS
FEED pushbutton.
‐ DC BUS 2 supplies DC BUS 1 and DC BAT BUS automatically after 5 s.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
ELECTRICAL
DESCRIPTION - OPERATIONS
A318/A319/A320/A321 FLEET DSC-24-10-30-30 P 4/22
FCOM 19 AUG 10
FAILURE OF AC BUS 1
Applicable to:
,
,
MSN,,,,
‐ AC BUS 2 can supply AC ESS BUS, and ESS TR can supply DC ESS BUS, both via the AC ESS
FEED pushbutton.
‐ DC BUS 2 supplies DC BUS 1 and DC BAT BUS automatically after 5 s.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
ELECTRICAL
DESCRIPTION - OPERATIONS
A318/A319/A320/A321 FLEET DSC-24-10-30-30 P 5/22
FCOM 19 AUG 10
FAILURE OF ONE TR
Applicable to:
The contactor of each TR opens automatically, in case of :
‐ Overheat
‐ Minimum current
The other TR automatically replaces the faulty one.
The ESS TR supplies the DC ESS BUS.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
ELECTRICAL
DESCRIPTION - OPERATIONS
A318/A319/A320/A321 FLEET DSC-24-10-30-30 P 6/22
FCOM 19 AUG 10
FAILURE OF ONE TR
Applicable to:
,
,
MSN,,,,
The contactor of each TR opens automatically, in case of :
‐ Overheat
‐ Minimum current
The other TR automatically replaces the faulty one.
The ESS TR supplies the DC ESS BUS.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
ELECTRICAL
DESCRIPTION - OPERATIONS
A318/A319/A320/A321 FLEET DSC-24-10-30-30 P 7/22
FCOM 19 AUG 10
FAILURE OF TR 1 AND TR 2
Applicable to:
If TR 1 and TR 2 are lost, DC BUS 1, DC BUS 2, and DC BAT BUS are lost. The DC ESS BUS is
supplied by the ESS TR.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
ELECTRICAL
DESCRIPTION - OPERATIONS
A318/A319/A320/A321 FLEET DSC-24-10-30-30 P 8/22
FCOM 19 AUG 10
FAILURE OF TR 1 AND TR 2
Applicable to:
,
,
MSN,,,,
If TR 1 and TR 2 are lost, DC BUS 1, DC BUS 2, and DC BAT BUS are lost. The DC ESS BUS is
supplied by the ESS TR.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
ELECTRICAL
DESCRIPTION - OPERATIONS
A318/A319/A320/A321 FLEET DSC-24-10-30-30 P 9/22
FCOM 19 AUG 10
EMERGENCY GENERATION AFTER LOSS OF ALL MAIN GENERATORS
Applicable to:
If both AC BUS 1 and AC BUS 2 are lost and the aircraft speed is above 100 kt, the Ram Air Turbine
(RAT) extends automatically. This powers the blue hydraulic system, which drives the emergency
generator by means of a hydraulic motor. This generator supplies the AC ESS BUS, and the DC ESS
BUS via the ESS TR.
When the landing gear is down, the emergency generator is no longer powered, and the emergency
generation network is automatically transferred to the batteries and the static inverter, and the
system automatically sheds the AC SHED ESS and DC SHED ESS buses.
When the aircraft is on ground :
Below 100 kt, DC BAT BUS is automatically ‐ connected to the batteries.
‐ Below 50 kt, AC ESS BUS is automatically shed, leading to the loss of all CRTs.
Note: 1. During RAT extension and emergency generator coupling (about 8 s), the batteries
power the emergency generation network.
2. If only the batteries are powering the emergency generation network, APU start is only
available on ground (speed below 100 kt).
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
ELECTRICAL
DESCRIPTION - OPERATIONS
A318/A319/A320/A321 FLEET DSC-24-10-30-30 P 10/22
FCOM 19 AUG 10
EMERGENCY GENERATION AFTER LOSS OF ALL MAIN GENERATORS
　
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