Table of Contents
For Training Purposes Only
May 03
7-i
P I LOT T R A I N I N G GU I D E ELECTRICAL
Introduction .........................................................................................................................7-1
Alternating Current (AC) System ........................................................................................7-3
Description ....................................................................................................................7-3
Components and Operation..........................................................................................7-4
Integrated Drive Generators (IDGs) ........................................................................7-4
APU Generator........................................................................................................7-6
External AC Electrical Power ........................................................................................7-8
Description ....................................................................................................................7-8
Operation ......................................................................................................................7-8
AC Electrical Power Distribution ....................................................................................... 7-10
Description .................................................................................................................. 7-10
Components and Operation........................................................................................ 7-11
AC BUS 1 and AC BUS 2 ..................................................................................... 7-11
AC ESS (Essential) Bus........................................................................................ 7-13
AC Utility Buses .................................................................................................... 7-14
Air-Driven Generator (ADG).............................................................................................. 7-15
Description .................................................................................................................. 7-15
Components and Operation........................................................................................ 7-16
Air-Driven Generator ............................................................................................. 7-16
ADG Auto Deploy Control Unit.............................................................................. 7-17
ADG Manual Deploy Handle ................................................................................. 7-18
DC Electrical Power System ............................................................................................. 7-20
Description .................................................................................................................. 7-20
Components and Operation........................................................................................ 7-22
Transformer-Rectifier Units (TRUs) ...................................................................... 7-22
TRU Power Distribution System............................................................................ 7-22
Battery Power Distribution System........................................................................ 7-24
External DC Electrical Power ................................................................................ 7-25
Circuit Breakers........................................................................................................... 7-27
Description ............................................................................................................ 7-27
Controls and Indicators ..................................................................................................... 7-30
AC Electrical Power .................................................................................................... 7-30
Air-Driven Generator (ADG)........................................................................................ 7-31
DC Electrical Power .................................................................................................... 7-32
Circuit Breaker Panels ................................................................................................ 7-33
EICAS Synoptic Pages ............................................................................................... 7-37
AC Synoptic Page ................................................................................................. 7-37
DC Synoptic Page................................................................................................. 7-44
EICAS Messages........................................................................................................ 7-50
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