Boeing 737-800 - DC Power System Schematic

737 Flight Crew Operations Manual
Electrical -
System Description
Boeing Proprietary. Copyright © Boeing. May be subject to export restrictions under EAR. See title page for details.
6.20.10 D6-27370-866-EGP
DC Power System Schematic
SWITCH
BATTERY
OFF
ON
BUS TRANSFER
F
O
U
A
F
O
T
TR1
TR3 TR2
BAT OFF AUTO
BATT
CHGR
TO APU STARTER
BAT
SWITCHED
HOT BAT BUS
HOT BATTERY BUS
STANDBY POWER SWITCH
DC BUS 2
TIE RELAY
CROSS BUS
DC BUS 1
STANDBY POWER SWITCH - AUTO
BATTERY SWITCH - ON
BUS TRANSFER SWITCH - AUTO
ENGINE GENERATOR CONNECTED
AIRPLANE CONFIGURATION - IN FLIGHT
NORMAL
AC TRANSFER BUS 1
AC TRANSFER BUS 2
SERVICE BUS 2
115V AC GND
BATTERY BUS
STANDBY POWER
CONTROL UNIT
ALTERNATE
DC STANDBY BUS
STBY
September 28, 2006