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737 GENERAL - ANTENNA LOCATIONS
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737-600/700/800/900 TRAINING MANUAL 737 GENERAL -- EXTERNAL POWER APPLICATION THIS PAGE INTENTIONALLY LEFT BLANK
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737 GENERAL -- EXTERNAL POWER APPLICATION General
You use these panels to apply external electrical power:
-P5-13 electrical meters, battery and galley power
module
-P5-4 ac systems, generator, and APU module
-P19 external power receptacle panel.
P5-13 Electrical Meters, Battery, and Galley Power Module
The BAT switch lets you energize these buses with battery power:
-Switched hot battery bus
-Battery bus
-AC and DC standby buses.
The switch is guarded in the BAT ON position.
P5-4 AC Systems, Generator and APU Module
The ground power switch gives you manual control when good quality ground power is available. The blue GRD POWER AVAILABLE light above the switch shows if the ground source is connected and quality is good.
The ground power switch has three positions and is spring loaded to the center (neutral) position. The ON and OFF positions are momentary positions.
737-600/700/800/900 TRAINING MANUAL
P19 External Power Receptacle Panel
The external power receptacle panel has these two sections:
-External power receptacle
-Control and display section.
You connect the external power cable to the external power receptacle.
The control and display section has the EXTERNAL POWER CONN and the external power NOT IN USE indicators.
The amber EXTERNAL POWER CONN light comes on when the ground power plug is connected and power is present.
The white NOT IN USE indicator comes on when external power is present, but not in use.
External Power Application
Before you supply external power to the airplane, make sure that the external power supply operates correctly.
WARNING: IF THE EXTERNAL POWER SUPPLY HAS AN EARTH GROUNDED NEUTRAL, THERE MUST NOT BE AN OPEN OR FLOATING GROUND IN THE NEUTRAL CIRCUIT WIRING OF THE SUPPLY OR THE AIRPLANE. IF AN OPEN OR FLOATING GROUND IS PRESENT, THE AIRPLANE CAN
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737 GENERAL -- EXTERNAL POWER APPLICATION
BE PUT AT AN ELECTRICAL POTENTIAL ABOVE EARTH GROUND. THIS ELECTRICAL POTENTIAL CAN CAUSE ELECTRIC SHOCK WITH POSSIBLE SEVERE INJURY TO PERSONNEL WHO TOUCH THE AIRPLANE.
WARNING: REMOVE THE ELECTRICAL POWER FROM THE EXTERNAL POWER CABLE BEFORE YOU CONNECT THE CABLE TO THE AIRPLANE. INJURY TO PERSONS CAN BE CAUSED BY AN ELECTRICAL SHOCK.
To apply power, open the external power receptacle door and connect the power cable to the external power receptacle.
Energize the external power cable.
These lights on the external power panel (P19) come on:
-EXTERNAL POWER CONN
-NOT IN USE.
The GRD POWER AVAILABLE light on the P5-4 panel also comes on.
To let the ground power go to the ac transfer buses, put the BAT switch on the P5-13 module to ON. Then put the GRD PWR switch on the P5-4 panel to ON.
These lights on the P5-4 panel go off when ground power goes to the ac transfer buses:
-1 SOURCE OFF
-2 SOURCE OFF
737-600/700/800/900 TRAINING MANUAL
-1 TRANSFER BUS OFF
-2 TRANSFER BUS OFF.
The NOT IN USE light on the P19 panel also goes off.
External Power Removal
To remove external power from the airplane, put the GRD PWR switch momentarily to the OFF position. Then put the BAT switch to the OFF position. This removes the ac power from the ac transfer buses and the battery power from the standby, switched hot battery and battery buses.
The external power NOT IN USE light on the P19 panel comes on.
When you de-energize the external power cable, the EXTERNAL POWER CONN and the NOT IN USE lights go off. You can then safely remove the cable from the external power receptacle.
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737-600/700/800/900 TRAINING MANUAL
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GROUND POWER AVAILABLE LIGHT
GRD POWER
BATTERY
AVAILABLEb
SWITCH
GRD
PWR GROUND POWER
OFF OFF
SWITCH
BAT ON
ON
BUS TRANSFER
DC AO U
TRANSFER TRANSFER
F
BUS OFF a BUS OFF a
T
P5-13 ELECTRICAL METERS
F O
SOURCE
SOURCE OFF a
BATTERY AND GALLEY
OFF a
POWER MODULE
GEN OFF
GEN OFF BUS APU GEN BUSOFF BUSb bb
OFF OFF
ON ON
GEN 1 APU GEN GEN 2 APU
P5-4 AC SYSTEMS, GENERATOR, AND APU MODULE
EXTERNAL POWER
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