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24-38-00 DC GENERATION - BATTERY SYSTEM
D/O
CONTENTS:
General
Battery Description
Battery Control
Indicating/Monitoring
Self Examination
TMUELBQ02 LEVEL 3
EFFECTIVITY 24-38-00 Page 1
May 31/00
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 24 ELECTRICAL POWER
UF94200
EFFECTIVITY Page 389
ALL
DC GENERATION - BATTERY SYSTEM D/O
GENERAL
The battery system is composed of two batteries which
are mainly used to start the APU and supply AC and DC
essential network in emergency configuration.
Each battery is associated to one Battery Charge
Limiter (BCL). The BCL ensures battery charge and
battery protection by controlling the battery
contactor.
BATTERY DESCRIPTION
The two batteries are identical and interchangeable.
Each battery is ventilated by two ducts. The
differential pressure between the cabin and the outside
is used to provide battery ventilation.
Each battery has 20 nickel cadmium cells in a stainless
steel case. Each cell can be removed separately.
Battery nominal voltage: 24 VDC.
Battery nominal capacity: 23 Ah.
BATTERY CONTROL
Each battery is associated to a Battery Charge Limiter
which is controlled by the corresponding battery
pushbutton.
When the BAT pushbutton is pressed in (AUTO position),
the BCL controls the battery coupling / uncoupling.
When released out, the battery is uncoupled from the
network and the white OFF light comes on.
NOTE: In flight, in normal configuration, the
batteries are uncoupled from the network.
INDICATING/MONITORING
Battery parameters such as voltage, current and
warnings are displayed by the ECAM.
The voltmeters, located on the main control panel,
give battery voltage indication even in a cold aircraft
configuration.
The BCLs monitor the charge of the batteries.
In the event of battery thermal runaway or internal
short circuit, the battery is isolated, the amber FAULT
light comes on and the ECAM system is activated.
System failures and BITE data are sent to the
Centralized Fault Display System (CFDS).
TMUELBQ02-T01 LEVEL 3
EFFECTIVITY 24-38-00 Page 2
May 31/00
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 24 ELECTRICAL POWER
UF94200
EFFECTIVITY Page 390
ALL
DC GENERATION - BATTERY SYSTEM D/O
TMUELBQ02-P01 LEVEL 3
EFFECTIVITY 24-38-00 Page 3
May 31/00
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 24 ELECTRICAL POWER
UF94200
EFFECTIVITY Page 391
ALL
SELF EXAMINATION
In cold aircraft configuration (no AC and DC
supply), where is (are) the battery indication(s)
displayed?
A - On the ECAM.
B - On the ELEC PWR control panel.
C - There is no indication.
When does the BAT FAULT light come on?
A - When the BAT pushbutton is set to OFF.
B - When the discharge current is too high.
C - When a thermal runaway or an internal
short circuit occurs.
TMUELBQ02 LEVEL 3
EFFECTIVITY 24-38-00 Page 4
May 31/00
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 24 ELECTRICAL POWER
UF94200
EFFECTIVITY Page 392
ALL
24 - ELECTRICAL POWER
24-38-00 DC GENERATION - BATTERY CHARGE
LIMITER D/O
CONTENTS:
General
Purpose
Battery Charge(Pushbutton In)
Protection 1: Thermal Runaway or Short Circuit
Protection
Protection 2: Complete Discharge Protection
Protection 3: Hot Bus Protection
Emergency Configuration
APU Start
EMER GEN FAULT Control
BAT FAULT Control
Self Examination
TMUELBR02 LEVEL 3
EFFECTIVITY 24-38-00 Page 1
Jun 30/00
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 24 ELECTRICAL POWER
UF94200
EFFECTIVITY Page 393
ALL
DC GENERATION - BATTERY CHARGE LIMITER D/O
GENERAL
The two Battery Charge Limiters (BCL) are identical
and interchangeable. Pin programming determines the
position of the BCL and the aircraft type.
PURPOSE
The main function of the BCL is to control the battery
contactor and battery FAULT warning. Also, BCL 1 and
BCL 2 control the emergency generator FAULT warning.
The battery contactor control includes the following
functions: protection of the battery against thermal
runaway or short circuit, ensuring battery charge,
preventing complete discharge, ensuring integrity of
the HOT BUS, assisting starting of the APU.
　
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