T-45A UJPT, E2-C2, ADV, & IUT Eng-07
Electrical
PRESENTATION
Sg 1, fr 1
Lesson Organization
Sg 1, fr 2 (9 Overlays)
I.
Electrical system major component identification
1.4.4.3.1
ARMAMENTBUS
ARMAMENT BUS
WARNINGLIGHTS
GEN
LEGEND
GEN
GEN
FWD GENERATOR
GENERATOR
AFT
RESET
MSTR
CONTACTOR/
UNDER
ARM
OVERVOLT
OVERVOLT
VOLT
OLT
O
HI-CURRENT
VOLTAGGE
OLTAE
UNITT
NI
REG
N
RELAY
SENSINNG
ENSIG
UNIT
OFF
OFF
OFF
RELAY
NON-ESSENTIAL
SAFE
BUS CONTROL
FUSE
28VDCGENBUS
A.
Power generation and control
CAUTION LIGHTS
P R
W
FWD
AFT
EXT
FWD
AFT
ISLN
RLY
AC INVERTER
ACINVERTER
28VDCESSSERVICESBUS
GENFAILRELAY
INV-2
POWERINPUTRELAY
CWS
A
ON
ON
28 VDC ESSENTIAL LOADS
1.
Generator
ELECT
UNIT
INV
INV
BATT 1
BATT 2
NO. 1
NO. 2
28VDCGENBUSLOADS
28VDCGENBUSLOADS
B
LO
OFF
OFF
AC
OFF
OFF
RESET
28VDCGROUNDSERVICESBUS
26VAC
115VAC
ESSBUS
ESSBUS
ESSBUS
26VACNON-ESSENTIALBUS
24 VDC
24 VDC
a.
Location: below engine, mounted on
18 AMP
18AMP
115VACNON-ESSENTIALBUS
BATTERY
BATTERY
engine accessory gearbox
ELECTRICAL SYSTEM BLOCK
DIAGRAM
b.
Physical: 28 VDC, 9 KW brushless
Overlay 1
generator
Generator
2.
Batteries
Overlay 2
Batteries
a.
Location: main equipment bay,
mounted to lower sections of frame
10, accessed through forward
equipment access door
b.
Description
(1) Functional
(a) Provide DC power to start
aircraft
(b) Provide emergency power if
generator fails
(c) If generator is off-line and will
not reset, two good batteries
will give power for
27 minutes. With only one
good battery, power will only
be available for 12 minutes.
(2) Physical: two sealed lead/acid gel
24 VDC, 18 AH batteries
(8-03) Original
Page 7-3
Previous Page
