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TMUELAB01-P02 LEVEL 3
EFFECTIVITY 24-20-00 Page 5
Nov 30/95
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 24 ELECTRICAL POWER
UF94200
EFFECTIVITY Page 93
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TMUELAB01 LEVEL 3
EFFECTIVITY 24-20-00 Page 6
Nov 30/95
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 24 ELECTRICAL POWER
UF94200
EFFECTIVITY Page 94
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24 - ELECTRICAL POWER
24-21-00 AC GENERATION - IDG DESCRIPTION
CONTENTS:
General
Generator Drive
Speed Control
Control and Monitoring
Self Examination
TMUELAC05 LEVEL 3
EFFECTIVITY 24-21-00 Page 1
May 31/00
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 24 ELECTRICAL POWER
UF94200
EFFECTIVITY Page 95
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AC GENERATION - IDG DESCRIPTION
GENERAL
Each engine drives its associated Integrated Drive
Generator (IDG) through the accessory gearbox. The
drive speed varies according to the engine rating.
The IDG is split in two parts: the drive and the
generator.
The IDG is cooled and lubricated by the IDG oil system.
GENERATOR DRIVE
Using the variable input speed, the generator drive
produces a constant speed on the output shaft via a
variable ratio differential.
The output constant speed is regulated at 12000 RPM.
SPEED CONTROL
A mechanical governor, acting on a hydraulic trim unit,
controls the differential gear in order to maintain
the constant output speed.
The differential gear also controls the oil system
pumps in order to lubricate and cool the IDG
components.
CONTROL AND MONITORING
AC generation is monitored by the Generator Control
Unit (GCU). GEN 1 OR 2 pushbutton controls generator
excitation via its Generator Control Unit.
For safety reasons and IDG protection, an IDG1 (or
IDG2) guarded pushbutton allows manual disconnection
of the IDG.
NOTE: Reset of the system can only be performed on
ground, with engines stopped, by pulling the
reset handle mounted on IDG casing.
TMUELAC05-T01 LEVEL 3
EFFECTIVITY 24-21-00 Page 2
May 31/00
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 24 ELECTRICAL POWER
UF94200
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AC GENERATION - IDG DESCRIPTION
TMUELAC05-P01 LEVEL 3
EFFECTIVITY 24-21-00 Page 3
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_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 24 ELECTRICAL POWER
UF94200
EFFECTIVITY Page 97
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SELF EXAMINATION
How is IDG1 disconnected?
A - Automatically, when an overspeed is
detected.
B - Automatically, when a faulty parameter
is detected by the GCU.
C - By pressing the IDG1 guarded pushbutton.
TMUELAC05 LEVEL 3
EFFECTIVITY 24-21-00 Page 4
May 31/00
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 24 ELECTRICAL POWER
UF94200
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24 - ELECTRICAL POWER
24-21-00 AC GENERATION - IDG COOLING
SYSTEM
CONTENTS:
General
Operation Principle
Cold Conditions
Filter clogged
Temperature and Pressure Monitoring
Self Examination
TMUELAD04 LEVEL 3
EFFECTIVITY 24-21-00 Page 1
May 31/00
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 24 ELECTRICAL POWER
UF94200
EFFECTIVITY Page 99
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AC GENERATION - IDG COOLING SYSTEM
GENERAL
The IDG oil cooling system consists of a self-contained
oil circuit and a fuel/oil heat exchanger.
OPERATION PRINCIPLE
A scavenge pump pumps the oil through the oil filter
and the fuel/oil heat exchanger. A charge pump provides
regulated oil supply pressure to the users.
The engine fuel flow regulates the IDG oil temperature
through the fuel/oil heat exchanger.
TMUELAD04-T01 LEVEL 3
EFFECTIVITY 24-21-00 Page 2
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_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 24 ELECTRICAL POWER
UF94200
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AC GENERATION - IDG COOLING SYSTEM - OPERATION PRINCIPLE
TMUELAD04-P01 LEVEL 3
EFFECTIVITY 24-21-00 Page 3
May 31/00
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 24 ELECTRICAL POWER
UF94200
EFFECTIVITY Page 101
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AC GENERATION - IDG COOLING SYSTEM
COLD CONDITIONS
In cold conditions, due to the high oil viscosity, the
　
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