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Flight Crew Operating Manual Rev 3, Apr 25, 2005
CSP 700−5000−6
Volume 2
07−10−4
AC SYSTEM (CONT'D)
Emergency AC power is supplied by the ram air turbine (RAT) in flight, rated at 115 volts, 9 kVA, 3
phase. With engines running, the RAT will depoy with a 14 second time delay following the loss of all
AC power, if the slat/flap handle is at the in/0° position. It will deploy automatically if the slat/flap
handle is not at the in/0° position. With a dualengine
failure, the RAT will deploy automatically,
regardless of slat/flat handle position. The RAT can also be manually deployed by pulling RAT
manual deploy handle, located on the center pedestal. Once deployed, the RAT will power the AC
ESS BUS via the ram air turbine line contactor (RATLC).
MANUAL DEPLOY
HANDLE RAT
GF0710_004
The RAT also incorporates a hydraulic pump, which powers hydraulic system #3. At approximately
147 KIAS and below, the RAT sheds its electrical output, giving priority to hydraulics.
A ground safety pin is installed in the nose wheel well area to secure the RAT in position while on
ground.
ELECTRICAL
Rev 3, Apr 25, 2005 Flight Crew Operating Manual
CSP 700−5000−6
Volume 2
07−10−5
AC SYSTEM (CONT'D)
GROUND
SAFETY
PIN
GF0710_005
DEPLOYMENT
ACTUATOR
RETRACTION
PUMP
UPLOCK
RAM AIR
TURBINE
GENERATOR
HYDRAULIC
PUMP
DOWNLOCK
RELEASE
ELECTRICAL
Flight Crew Operating Manual Rev 3, Apr 25, 2005
CSP 700−5000−6
Volume 2
07−10−6
AC SYSTEM DISTRIBUTION
9
GTC
7
GEN
2
GEN
1
AC BUS 1
LH Engine RH Engine
AC BUS 3 AC BUS 4
AC ESS BUS
APU
GEN
EXT
AC
ACPC
AC BUS 2
GCU
GCU
GCU GCU
GCU
GTC
12
GTC
11
GTC
4
GTC
5
GLC
1
GLC
2
GLC
3
GLC
4
GTC
3
GTC
6
GTC
GTC 1
8
GTC
GTC
2
GTC
10
RATLC
EPLC APULC
CCBP
TRU 1
RAT GEN
GCU
AC BUS 1A AC BUS 2A AC BUS 3A
TRU 2
ESS
TRU 1
ESS
TRU 2
GEN
3
GEN
4
GF0710_006
ELECTRICAL
Rev 3, Apr 25, 2005 Flight Crew Operating Manual
CSP 700−5000−6
Volume 2
07−10−7
ELECTRICAL PANEL
The generators and external power can be controlled manually by selecting the appropriate switch on
the electrical panel, located on the overhead panel. GEN 1, 2, 3, 4 and APU GEN switches are
normally ON.
RAT GEN Switch
Used to reset a fault or to turn
RAT generator off.
generator is on line.
RAT generator operation is
inhibited.
GEN 1, 2, 3, 4 Switches
Used to reset or to turn
applicable generator off.
failed generating channel
(GEN, GCU, GLC). FAIL light
illuminates when fire
discharge handle is pulled
generator operation inhibited.
APU GEN Switch
Used to reset or to turn
APU generator off.
failed generating channel.
generator operation inhibited.
NOTE
If RAT GEN is powering AC ESS BUS, and a main generator is available, stow the RAT deploy
handle and select RAT GEN to OFF, to transfer AC ESS BUS to the main generator. The RAT
GEN will remain armed to ensure RAT GEN priority in the event of loss all main generators.
External AC Switch
Displays status of AC external power:
external AC power is connected and is the
correct phase, voltage and frequency.
is being used or can be used by the
airplane power distribution system to
maintain power to the AC busses.
GF0710_007
FAIL Light − Indicates a
OFF Light − Indicates
ON Light − Indicates that RA T
OFF Light − Indicates that
FAIL Light − Indicates a
OFF Light − Indicates
AVAIL Light − Comes on to indicate that
ON Light − Indicates that external power
ELECTRICAL
ON
BATT MASTER
OFF
EMS
ON ON
AVAIL AVAIL
EXT AC EXT DC
PUSH OFF/RESET
OFF OFF
FAIL FAIL
GEN 3 GEN 4
OFF
FAIL
GEN 2
OFF
FAIL
GEN 1
OFF
FAIL
APU GEN
PUSH
OFF/RESET
OFF
ON
RAT GEN
ELECTRICAL
Flight Crew Operating Manual Rev 3, Apr 25, 2005
CSP 700−5000−6
Volume 2
07−10−8
ELECTRICAL MANAGEMENT SYSTEM
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