T-45C TS, ADV & IUT ENG-27/ENG-28
Engineering Review
Sg 5, fr 1
PRESENTATION
Fig: 1
Electrical System
I.
Electrical System & Electrical System Malfunctions
Block Diagram
A. Electrical system major component
1.
Generator
Sg 5, fr 2
Generator
a.
Functional: produces aircraft main source of
electrical power
b.
Physical: 28 VDC, 9 KW brushless generator
2.
Batteries
Sg 5, fr 3
Batteries
a.
Functional
(1) Provide DC power to start aircraft,
emergency power if generator fails
(2) With generator failure, two good batteries
will give power for 27 minutes. With only
one good battery, power will only be
available for 12 minutes
b.
Physical: two sealed lead/acid 24 VDC, 18 AH
batteries
3.
Inverters
Sg 5, fr 4
Inverters
a.
Functional: convert aircraft 28 VDC to 115 VAC
and 26 VAC, 400 Hz, single-phase power
b.
Physical: two identical 500 W inverters
4.
Power control
a.
Voltage regulator controls generator output to
Sg 5, fr 5
match electrical loads
Voltage Regulator
b.
Overvoltage unit monitors generator voltage
Sg 5, fr 6
and takes generator off-line if output voltage
Overvoltage Unit
exceeds 30.2 VDC
(9-98) Original
Page 27-8
Previous Page
