737 MAX Flight Crew Operations Manual
Electrical -
System Description
6.20.10
MN-FLT-OH-201
DC Power System Schematic
AUX BAT
BUS TRANSFER
F
O
U
A
F
O
T
TR1
TR3
TR2
SWITCH
BATTERY
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 TO RELATED BUS
AIRPLANE CONFIGURATION - IN FLIGHT
NORMAL
OFF
ON
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
SERVICE BUS 1
115V AC GND
CHGR
BATT
AUX
March 1, 2021