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AUTO : When the following conditions are met :
• AC BUS 1 is not electrically supplied.
• AC BUS 2 is not electrically supplied.
• Aircraft speed is greater than 100 kt.
‐ The RAT extends.
‐ The blue hydraulic system drives the emergency generator.
‐ As soon as the emergency generator electrical parameters are within tolerance
and the landing gear is retracted, the emergency generator is connected to the
aircraft network.
Pressed : This selects manual RAT extension.
Emergency generator coupling occurs 3 s after the RAT supplies the emergency
generator.
(2) FAULT lt
This light comes on red if the emergency generator is not supplying power when AC BUS 1 and
AC BUS 2 are not powered.
(3) EMER GEN TEST pb (guarded)
Pressed and held :
• If AC NORMAL BUSES are supplied :
The EMER GEN is driven hydraulically ‐ if the blue electric pump is running.
The AC ESS BUS and the DC ESS BUS are connected to the emergency generator.
(The DC ESS SHED and AC ESS SHED buses are not powered.)
‐ ECAM displays the ELEC page automatically (only on the ground).
• If only the batteries supply the aircraft :
‐ The static inverter powers the AC ESS BUS.
(4) GEN 1 LINE pb sw
OFF : GEN 1 line contactor opens.
The AC BUS 1 channel is supplied from GEN 2 through bus tie contactors. This is
used for smoked drill.
SMOKE
lt
: (Refer to DSC-26-30-20 OVERHEAD PANEL)
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
ELECTRICAL
CONTROLS AND INDICATORS
A318/A319/A320/A321 FLEET DSC-24-20 P 24/44
FCOM 19 AUG 10
EXTERNAL POWER PANEL
Applicable to: ALL
(1) EXT PWR NOT IN USE
This white light comes on to inform ground personnel that the ground power unit is not
supplying the aircraft network and can be removed.
(2) EXT PWR AVAIL
This amber light comes on to indicate that external power is available and the voltage is
correct.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
ELECTRICAL
CONTROLS AND INDICATORS
A318/A319/A320/A321 FLEET DSC-24-20 P 25/44
FCOM 19 AUG 10
FORWARD CABIN
Applicable to: ALL
MAINT BUS SW :
This switch allows personnel to energize electrical circuits for ground servicing without energizing
the entire aircraft electrical system.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
ELECTRICAL
CONTROLS AND INDICATORS
A318/A319/A320/A321 FLEET DSC-24-20 P 26/44
FCOM 19 AUG 10
ON : The switch latches magnetically if external power is connected and normal (AVAIL light
on).
The AC and DC GND/FLT buses have power and the following loads can be energized :
passenger ‐ compartment lighting
‐ galley lighting
‐ entrance area lights
‐ lavatory lighting and service
‐ vacuum cleaner sockets
‐ flight compartment service outlets
‐ hydraulic pump (yellow system)
‐ flight compartment flood lighting
‐ fuel quantity indications
‐ refueling
‐ cargo hold lighting
‐ main and nose landing gear compartment lighting
‐ belly fairing panel service outlets
‐ ground call
‐ equipment compartment lights and service outlets
‐ navigation lights.
The switch trips when the external source is removed.
OFF : The AC and DC GND/FLT buses are connected to AC BUS 2 and DC BUS 2.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
ELECTRICAL
CONTROLS AND INDICATORS
A318/A319/A320/A321 FLEET DSC-24-20 P 27/44
FCOM 19 AUG 10
ECAM ELEC PAGE
Applicable to:
,
,
MSN,,,,
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
ELECTRICAL
CONTROLS AND INDICATORS
A318/A319/A320/A321 FLEET DSC-24-20 P 28/44
FCOM 19 AUG 10
(1) Battery indications
‐ BAT pushbutton switch at OFF :
Legend is in white.
‐ BAT pushbutton switch at Auto :
(A)
Legend is normally white, but becomes amber
• when voltage and current indications change to amber, or
• in case of a BAT FAULT warning.
(B) Battery voltage is normally green, but becomes amber if V > 31 V or V < 25 V.
(C) Battery current is normally green, but becomes amber if discharge current > 5 A.
(2) Battery charge/discharge indication
(3) DC BAT indication
It is normally in green. It becomes amber, if DC BAT voltage ≤ 25 V.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
ELECTRICAL
CONTROLS AND INDICATORS
A318/A319/A320/A321 FLEET DSC-24-20 P 29/44
FCOM 19 AUG 10
　
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