DC Power System Schematic  . . . . . . . . . . . . . . . . . . . . . . . . 6.20.11
Standby Power System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.20.12 Normal Operation  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.20.12 Alternate Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.20.12 Static Inverter  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.20.13 Standby Power System Schematic  . . . . . . . . . . . . . . . . . . . . 6.20.14
All Generators Inoperative . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.20.16 Airplane General, Emergency Equipment, Doors, and Windows  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.20.16 Air Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.20.16 Engines, APU  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.20.16 Communications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.20.16 Electrical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.20.16 Flight Instruments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.20.17 Fire Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.20.17 Fuel  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.20.17 Hydraulics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.20.17 Landing Gear . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.20.17 Navigation  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.20.17
Warnings  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.20.18
Basic Equipment Operating – Instrument Panels . . . . . . . . . . . . 6.20.20
Electrical System Power Distribution  . . . . . . . . . . . . . . . . . . . . 6.20.26 No. 1 Generator Inoperative . . . . . . . . . . . . . . . . . . . . . . . . . 6.20.26 No. 2 Generator Inoperative . . . . . . . . . . . . . . . . . . . . . . . . . 6.20.27
Copyright . The Boeing Company. See title page for details.
6.TOC.0.2  August 1, 2003

737 Operations Manual

Electrical Panel

AC AND DC METERING PANEL
GENERATOR DRIVE AND STANDBY POWER PANEL
GROUND POWER AND GEN AMMETERS PANEL
BUS SWITCHING PANEL

Copyright . The Boeing Company. See title page for details.
December 1, 2000  6.10.1
Electrical -Controls and Indicators

AC and DC Metering Panel

DC Ammeter
Indicates current of source selected by DC meter selector.

DC Voltmeter
Indicates voltage of source selected by DC meter selector.

DC Meter Selector Selects the DC source for the DC voltmeter and DC ammeter indications TEST - used by maintenance.
Copyright . The Boeing Company. See title page for details.
6.10.2  December 1, 2000

Electrical -Controls and Indicators 737 Operations Manual

Battery (BAT) Switch
OFF –
.  
removes power from battery bus and switched hot battery bus when
operating with normal power sources available.

.  
removes power from battery bus, switched hot battery bus, DC standby
bus, static inverter, and AC standby bus when battery is only power
source.

ON (guarded position) -
.
provides power to switched hot battery bus.

.  
energizes relays to provide automatic switching of standby electrical
system to battery power with loss of normal power in flight.

AC Frequency Meter
Indicates frequency of source selected by AC meter selector.

AC Voltmeter
130V scale - indicates voltage of source selected on the AC meter selector. 30V scale - indicates residual voltage of generator selected when RESID VOLTS switch is pressed.

AC Meter Selector
Selects the AC source for the AC frequency meter and AC voltmeter. TEST - used by maintenance.

GALLEY Power Switch
OFF – removes electrical power from galleys.
ON – electrical power is supplied to galleys when both AC generator busses are
powered.

Residual Volts (RESID VOLTS) Switch
PRESS - 30V scale of AC voltmeter indicates residual voltage of generator selected.
Associated generator switch must be OFF. With associated generator switch ON, AC voltmeter drives off scale and residual voltage cannot be read.
Electrical -Controls and Indicators

Generator Drive and Standby Power Panel

 LOW OIL PRESSURE Lights
Illuminated (amber) – generator drive oil pressure is below minimum operating limits.
　
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