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External AC Power Features
Displayedwhen externalAC voltageis more than10 volts andfrequency is more than50Hz.
EICAS DIGITAL READOUT GREEN AMBER WHITE HALF INTENSITY MAGENTA AMBER DASHES
XX KVA Loaded Overload Not loaded Insufficient data Invalid data
XXX V Between 106 and 124 volts _ Less than 106 volts or more than 124 volts _ Invalid data
XXX HZ Between 370 and 430 Hz _ Less than 370 Hz or more than 430 Hz _ Invalid data
EICAS OUTLINE GREEN WHITE HALF INTENSITY MAGENTA
ExternalAC available or in use ExternalAC not available and not in use Invalid data
AC Electrical System Synoptic Page
Figure 07---20---3 Sheet 3
Flight Crew Operating Manual MASTER
CSP A-
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ELECTRICAL AC Electrical System Vol. 1 07-
20-
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REV 56, Jan 31/03
<0039> <0006>
IDG 1 or 2 caution (amber)
Indicates that IDG has low oilpressure or highoiltemperature.
GEN 1 or 2 OFF caution (amber)
Indicates that generator is off. (Indications are inhibitedduring start)
GEN 1 or 2 OVLD caution (amber)
Indicates that generator controlunit has detected aloadof greater than40kVA.
APU GEN OFF caution (amber)
Indicates thatAPUgenerator is off and APUis ready to load.
APU GEN OVLD caution (amber)
Indicates that generator controlunit has detected aloadof greater than40kVA.
IDG 1 or 2 DISC status (white)
<0039>
Indicates that IDG has beendisconnected,
either automatically or manually.
<0039>
Status Page
AC Electrical System EICAS Indication (Generators) <MST Figure 07---20---4
Flight Crew Operating Manual MASTER
CSP A-
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ELECTRICAL Vol. 1 07-
20-
9
AC Electrical System REV 56, Jan 31/03
<0039> <0006>
AC Electrical System EICAS Indications (Busses) <MST>
Figure 07---20---5
Flight Crew Operating Manual MASTER
CSP A-
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ELECTRICAL AC Electrical System Vol. 1 07-
20-
10
REV 56, Jan 31/03
voltagelevel.
TRU Load Readouts
Displays, inincrements of 1 amp, theload the rectifier.
AC BUS to TRU Flow Lines
Green -
Respective ACbus is powering TRU.
TRU Output Flow Lines
Green -
Respective TRUis on-
lineand output is 18VDC or greater.
EICAS DIGITAL READOUT GREEN WHITE AMBER DASHES
xx V Between 22 and 29 VDC Less than 22 VDC or more than 29 VDC Invalid data
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