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electrically-supplied.
Note: In case of a total loss of main generators, the AC ESS BUS is
automatically supplied by the emergency generator, or by the static
inverter, if the emergency generator is not available.
(8) GALY & CAB pushbutton
AUTO : Main galley, secondary galley and in-seat power supply are supplied.
The main galley and in-seat power supply are shed automatically when :
‐ In flight : only one generator is operating.
‐ On the ground : only one engine generator is operating. (All galleys are
available when the APU GEN or EXT PWR is supplying power.)
OFF : The main galley, secondary galley and in-seat power supply are not
supplied.
FAULT lt : The amber light, and ECAM caution comes on, when the load on any
generator is more than 100 % of rated output.
(9) EXT PWR pb (momentary action)
AVAIL light comes on green, if :
External ‐ power is plugged in, and
‐ External power parameters are normal.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
ELECTRICAL
CONTROLS AND INDICATORS
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Pressed momentarily :
‐ If the AVAIL light was on :
• The external power line contactor closes.
• The AVAIL light goes off.
• The ON light comes on blue.
‐ If the ON light was on :
• The external power line contactor opens.
• The ON light goes off.
• The AVAIL light comes on.
Note: 1. External power has priority over the APU generator. The engine generators have
priority over external power.
2. The ON light stays on, even when the engine generators supply the aircraft.
(10) COMMERCIAL pb sw
ON : All aircraft commercial electrical loads are supplied :
‐ cabin and cargo lights
‐ water and toilet system
‐ drain mast ice protection
‐ galley
‐ passengers' entertainment
‐ semi-automatic cargo loading (if installed)
OFF: Switches off all aircraft commercial electrical loads.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
ELECTRICAL
CONTROLS AND INDICATORS
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FCOM 19 AUG 10
OVERHEAD PANEL
Applicable to:
MSN,
(1) BAT 1 (2) ind.
Shows battery voltage in white.
(2) BAT 1 (2) pb sw
Controls the operation of the corresponding battery charge limiter.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
ELECTRICAL
CONTROLS AND INDICATORS
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FCOM 19 AUG 10
Auto : The battery charge limiter controls automatically the connection and the
disconnection of the corresponding battery to the DC BAT BUS (3 PP) by closing
and opening of the battery line contactor.
The batteries are connected to the DC ‐ BAT BUS in the following cases :
• APU starting (MASTER SW at ON and N < 95 %).
Note: The connection is limited to 3 min when the emergency generator
is running.
• Battery voltage below 26.5 V (battery charge). The charging cycle ends
when battery charge current goes below 4 A.
‐ on ground, immediately
‐ in flight, after a time delay of 30 min .
• Loss of AC BUS 1 and 2 when below 100 kt (EMER GEN not supplying).
‐ If AC BUS 1 and 2 are not energized and the EMER GEN is not supplying :
• battery 1 supplies the AC STAT INV BUS, and, if speed is greater than 50 kt,
the AC ESS BUS.
• battery 2 supplies the DC ESS BUS.
Note: In normal configuration the batteries are disconnected most of the
time.
Note: A battery automatic cut-off logic prevents the batteries from
discharging completely when the aircraft is on the ground (parking).
Automatic battery contactors open when :
‐ The aircraft is on the ground.
‐ The BAT pushbutton switches are at AUTO.
‐ The main power supply (EXT PWR + GEN) is cut off.
‐ Battery voltage is low.
The flight crew can reset the contactors by switching the BAT
pushbutton switch to OFF then to AUTO.
OFF : The battery charge limiter is not operating : the battery line contactor is open.
OFF comes on white if the DC BAT BUS is supplied. Hot buses remain supplied.
FAULT lt : Comes on amber, accompanied by an ECAM caution, when the charging
current for the corresponding battery is outside limits.
In this case the battery contactor opens.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
ELECTRICAL
CONTROLS AND INDICATORS
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FCOM 19 AUG 10
(3) IDG 1 (2) (Integrated Drive Generator) pb sw (guarded)
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A320机组操作手册FLIGHT CREW OPERATING MANUAL 2(157)
