Boeing 787-8 - Page 690

787 Flight Crew Operations Manual
DO NOT USE FOR FLIGHT
Electrical -
System Description
Copyright © The Boeing Company. See title page for details.
6.20.6 D615Z003-TBC
Power Flow and Load Distribution
*
*
L1
Primary 235 Vac Loads:
- Wing Ice Protection
- ECS Recirc Fans
- Main Tank Fuel Pumps
- Cargo Heaters
Large Motor Controllers for:
- Hydraulic Pumps
- Cabin Air Compressors
- Ram Fans
- Engine & APU Start
- Center Tank Fuel Pumps
Primary 28 Vdc Loads:
- Ground Operations
- Common Core System
- Engine Igniters
- DC Fuel Pump
- Flt Deck Instr & Displays
- Bus Power Control Units
Primary 115 Vac Loads:
- Cabin & Exterior Lighting
Fwd
E/E
Bay
- 17 RPDUs total
- Approximately 900 Loads
Aft
E/E
Bay
*
*
*
- Loads 10 amps or less
- Brake Power
- Cabin Systems & IFE
- Aft Galley Complex (115 Vac)
- Nitrogen Generation System
*
*
- Galley Power
- Approximately 25 Loads
- Approximately 12 Loads
- Secondary FCTL Power
Fwd
Ext
Pwr
L
R
*RPDUs 28 Vdc & 115 Vac Loads:
Starter/Generator, RAT
RPDU
*
Power Conversion (typical)
Legend:
E/E Bay Contents
RAT
- Backup FCTL Power
- Approximately 200 Loads
Primary FCTL Power: Primary FCTL Power:
PP
P
P
APU
Aft
Ext
Pwr
- Audio & VHF Comm
- Autopilot / Autothrottle
- Integrated Surveillance
- Window Heat
- HF & SATCOM
- Spoilers
- Stabilizer
- Equipment Cooling
- Galley Refrigeration
- Alternate Flaps
- Approximately 40 Loads
LR
- Standby Power
235
L2
Vac
L1 R1 R2
28 Vdc115 Vac
Large Motor
Power Sys
*
*
*
*
L2 R1 R2
*
*
*
*
*
*
235 Vac Power
115 Vac Power
28 Vdc Power
External Power
Permanent Magnet Generator
+
-
APU
Batt
Main
Batt
+
-
*RPDUs
February 15, 2010