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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
24-00-00-002
External Power
External power can supply power to these buses:
* AC transfer buses
* Ground service buses.
External power supplies power to each AC transfer bus through
the external power contactor (EPC) and the necessary bus tie
breaker (BTB).
APU Power
The APU starter-generator supplies power to each AC transfer
bus through the APU breaker (APB) and the necessary BTB.
The APU can supply power to both AC transfer buses on the
ground or inflight. See the AC Generation section for more
information. (SECTION 24-20)
IDG Power
The IDGs are the normal power sources of the AC transfer
buses. An IDG supplies power through a generator control
breaker (GCB).
Battery Charger
GUN 001-012, 016-099, 101-110, 115
The battery charger makes sure there is maximum battery
charge. The battery charger also operates as a TRU when not in
the charge mode.
GUN 013-015, 111-114, 201-999
Each battery charger makes sure its battery stays at maximum
charge. Each battery charger also operates as a TRU when not
in the charge mode.
GUN ALL
Remote Control Circuit Breaker (RCCB)
The standby power system uses a RCCB to control power input
to the static inverter. This RCCB is normally closed. See the
Standby Power section 24-34 for more information.
(SECTION 24-34)
ELECTRICAL POWER - DISTRIBUTION - GENERAL DESCRIPTION
EFFECTIVITY
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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
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ELECTRICAL POWER - DISTRIBUTION - GENERAL DESCRIPTION
ELECTRICAL POWER - DISTRIBUTION - GENERAL DESCRIPTION
EFFECTIVITY
GUN 013-015, 111-114, 201-999 24-00-00
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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
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ELECTRICAL POWER - DISTRIBUTION - GENERAL DESCRIPTION
ELECTRICAL POWER - DISTRIBUTION - GENERAL DESCRIPTION
EFFECTIVITY
GUN 001-012, 016-099, 101-110, 115 24-00-00
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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
24-00-00-002
General
Electrical power components are in these areas of the airplane:
* Flight compartment
* External power panel
* Forward lower fuselage
* EE compartment
* Engine
* APU compartment.
Flight Compartment
Modules on the P5 overhead panel supply these functions for
the electrical power system:
* Manual control
* Indication
* DC and standby power system built-in-test equipment (BITE).
The P6 and P18 panels have many electrical power system
circuit breakers and relays.
The standby power control unit (SPCU) is in the P6 panel. The
SPCU has relays and circuit breakers for the DC and standby
power system.
External Power Panel
The external power panel is on the right side of the fuselage,
near the nose. The AC external power receptacle is at this
panel.
Forward Lower Fuselage
Relays for the electrical power system and other airplane
systems are in junction boxes in this area.
EE Compartment
Many electrical power components are in the EE compartment.
These are just a few:
GUN 001-012, 016-099, 101-110, 115
* Battery
* Battery charger
GUN 013-015, 111-114, 201-999
* Main battery
* Main battery charger
* Auxiliary battery
* Auxiliary battery charger
GUN ALL
* Generator control units (GCUs)
* Bus power control unit (BPCU)
* Power distribution panels (PDPs)
* Start converter unit (SCU).
The GCUs and BPCU supply BITE for the AC electrical power
and external power systems.
Engine
IDGs are on the forward face of the engine accessory gearbox.
The air/oil cooler is on the engine fan case.
ELECTRICAL POWER - AIRPLANE - COMPONENT LOCATIONS
EFFECTIVITY
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APU Compartment
The APU starter-generator is on the APU gearbox.
ELECTRICAL POWER - AIRPLANE - COMPONENT LOCATIONS
EFFECTIVITY
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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
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