B737NG_24-00-A3-01

CPS FREQ

DC AMP

LIGHTING DIM OFF

BRIGHT

ENTRY

ELECTRICAL POWER DIAGRAM

MEDIUM DIM BRIGHT OFF NIGHT

CEILING DIM BRIGHT

OFF

APU GEN 90kVA

DC VOLTS / AC AMPS / AC VOLTS BAT DISCHARGE

GROUND SERVICE

ELEC

TR UNIT

WORK

IDG 1 90kVA

WINDOW

MAINT APU GEN

AUX BAT BAT BAT BUS

GRD PWR

TR2

STBY PWR

GCU 1

GCU 2

INV

STBY PWR

TR3 TEST

FWD ATTENDANT PANEL

GEN2

GEN1

TR1

IDG 2 90kVA

EXT PWR

TEST

OFF OFF

GALLEY

BAT ON ON

AC

DC STANDBY PWR OFF DRIVE

LCT

TO APU START CIRCUIT

SCU

AGCU

LCT APB

GCB 1

LCT

LCT GCB 2

EPC

DRIVE

STANDBY POWER

AC XFR BUS 1

DISCONNECT

DISCONNECT

BAT

OFF

AC XFR BUS 2

GND SVCE XFER 1 R607 ***

AUTO

BPCU

GND SVC BUS 1

GRD PWR OFF

GND SVC BUS 2 GALLEY

GALLEY

AUX BATTERY CHRG

GRD POWER AVAILABLE

GND SVCE XFER 2 R608 ***

BTB 2

BTB 1

MAIN BATTERY CHRG

MAIN BUS 2

MAIN BUS 1 TR3 XFR RLY R622**

ON BUS TRANSFER TRANSFER BUS OFF

A U T O

O F F

TRANSFER BUS OFF

SOURCE OFF

RCCB**

SOURCE OFF

GEN OFF BUS

APU GEN OFF BUS

ON

ON

APU GEN

TRU 3

TRU 2

AUX BATTERY

OFF

OFF

GEN 1

TRU 1

GEN OFF BUS

STATIC INVERTER

GEN 2

BUS TIE RLY R9 **

DC BUS 1

P5 ELECTRICAL POWER

MAIN BATTERY DC BUS 2

STDBY NORM RLY K5* RCCB** AC STBY BUS

PARK BRAKE LIGHT

BAT BUS ALT RLY K1* EXTERNAL POWER

CONN

STDBY DC ALTN RLY K3*

BAT BUS NORM RLY K2*

FLIGHT

PILOT

NOT IN USE

BAT BUS

PARK BRAKE INTERPHONE LIGHT

TO APU START CIRCUIT

DC STBY BUS

NOSE WHEEL WELL ON

* Located inside the SPCU

NORM CALL

LIGHT

SW HOT BAT BUS RLY K8*

** Controlled by the SPCU

SW HOT BAT BUS P19 EXTERNAL POWER PANEL

HOT BAT BUS

GND SVC BUS RLY R634 ***

SPCU

GND SVC DC BUS

*** Controlled by the BPCU B737 24-00-A3-01