T-45A UJPT, E2-C2, ADV, & IUT Eng-07
Electrical
C.
Power protection
Overlay 7
1.
Fuse
Fuse
a.
Location: forward end of engine bay
b.
Description: connects generator to 28
VDC generator bus and provides 300
amp generator protection
2.
Buses and circuit breakers
Overlay 8
Buses
a.
Location: under floor of equipment
compartment, accessed through
forward equipment access door
NOTE: Because all breakers are on
the underside of the aircraft, the
aircrew cannot reset them during
flight.
b.
Description
(1) Three essential buses (two AC
and one DC) powered by battery
power if generator fails--e.g., IFF,
fire detection, warning/caution
panel (WCP), and UHF/VHF #1
(2) Three nonessential buses (two
AC and one DC) drop off the line
if the generator fails
(3) One ground services bus powered
by the number one battery when
the refueling panel door is open
NOTE: Also an armament bus
which is considered nonessential.
(4) Push-pull thermal circuit breakers
of various amperage levels pro-
vide
Page 7-6
(8-03) Original
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