24-30-00
ALL ú ú 03 Page 512 ú Feb 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
8) 6F3, IGN 1 ENG 3
9) 6K21, IGN 2 ENG 3
10) 6G21, STBY IGN ENG 3
11) 6F4, IGN 1 ENG 4
12) 6K22, IGN 2 ENG 4
13) 6G22, STBY IGN ENG 4
S 865-007
(2) Remove electrical power, if it is not necessary (AMM 24-22-00/201).
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
24-30-00
ALL ú ú 02 Page 513 ú Feb 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
1.
2.
3.
4.
5.
6.
7.
A
747-400 MAINTENANCE MANUAL
BATTERIES - DESCRIPTION AND OPERATION
_____________________________________
General
_______
A. There are two 40-ampere-hour nominal 24-volt dc nickle-cadmium batteries installed in the airplane. There are also two battery chargers that provide dc output for regulated charging of the batteries and also operate as a Transformer Rectifier Unit (TRU) if three or more TRUs fail. The ac power for the battery chargers is supplied from the ground service bus.
B. The batteries and battery chargers in the main and APU systems are
identical and are interchangeable.Main Battery (Fig. 1)
____________
A. The main battery is a 40-ampere-hour 24-volt dc nickle-cadmium battery, which consists of a case, cover, twenty cell assemblies, and a temperature sensor assembly. The temperature sensor assembly includes a thermoswitch and a charge control thermistor. The main battery is located in the forward-right main equipment center.
Main Battery Charger (Fig. 2)
____________________
A. The battery charger is installed to provide a dc output for regulated charging of the battery and also to operate as a TRU. The main battery charger is forced air cooled and is located on the E-30 shelf in the forward-right main equipment center.
Main Battery Charger Disable Relay (Fig. 3)
__________________________________
A. The main battery charger disable relay removes the 115-volt ac ground
service bus from the input of the main battery charger when energized.APU Battery (Fig. 4)
___________
A. The APU battery is identical to the main battery and is interchangeable. The APU battery is located in the aft, left side of the airplane on the E-33 equipment shelf.
APU Battery Charger (Fig. 4)
___________________
A. The APU battery charger is identical to the main battery charger and is interchangeable. The APU battery charger is force air cooled and is located in the aft, left side of the airplane on the E-33 equipment shelf.
APU Battery Charger Disable Relay (Fig. 4)
_________________________________
A. The APU battery charger disable relay removes the 115-volt ac ground service bus from the input of the APU battery charger when energized.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
24-31-00
ALL ú ú 03 Page 1 ú Feb 10/90
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
SEE C
SEE A
MAIN BATTERY RACK
A
MAIN BATTERY CONNECTOR
MAIN BATTERY
ELECTRICAL
CONNECTOR
B
Main Battery Location Figure 1
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
24-31-00
ALL ú ú 01 Page 2 ú Dec 10/88
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
SEE A
SEE B
E-30 EQUIPMENT RACK
A
MAIN BATTERY CHARGER
B
Main Battery Charger Location
Figure 2
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：747-400 AMM 飞机维护手册 ELECTRICAL POWER 电源 2(47)
