Boeing 737-800 - Ground Service; Electrical Power 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.
6.20.2 D6-27370-866-EGP
Ground Service
For ground servicing, a ground service switch is on the forward attendant’s panel.
The switch provides ground power directly to the AC ground service busses for
utility outlets, cabin lighting and the battery charger without powering all airplane
electrical busses. The ground service switch is a momentary push button and is
overridden when both AC transfer busses are powered.
Electrical Power Schematic
EXTERNAL AC
RECEPTACLE
HOT BAT BUS
SWITCHED
HOT BATTERY BUS
DC BUS 2
DC BUS 1
DRIVE
GEN
1
GEN
DRIVE
GEN
2
GEN
GEN
APU
TR2
TR3TR1
GND SERVICE
GND SERVICE
RELAY
RELAY
AIRPLANE CONFIGURATION - IN FLIGHT
ENGINE GENERATOR CONNECTED TO RELATED BUS
BUS TRANSFER SWITCH - AUTO
BATTERY SWITCH - ON
STANDBY POWER SWITCH - AUTO
INV
TO APU STARTER
BAT
CHGR
BATT
CROSS BUS
TIE RELAY
115V AC GND
SERVICE BUS 2
115V AC
MAIN BUS 2
BUS A & B
GALLEY
BUS C & D
GALLEY
115V AC
MAIN BUS 1
115V AC GND
SERVICE BUS 1
AC TRANSFER BUS 2
AC TRANSFER BUS 1
BATTERY BUS
DC STANDBY BUS
AC STANDBY BUS
GCB1
GCB2
BTB1
BTB2
September 28, 2006