T-45A UJPT, E2-C2, ADV, & IUT Eng-07
Electrical
(2) At 25 volts or less, deenergizes,
illuminating the GENERATOR
warning light, and disables one
inverter, illuminating AC
INVERTER caution light
NOTE: On aircraft 165093 and
UP, and those from 163600 thru
165092 with AFC 199 installed, the
AC INVERTER caution light will
not illuminate unless an AC
inverter has actually failed.
Nonessential AC buses, however,
are disabled.
NOTE: According to white paper:
(generator on its own) eventually the
speed of the generator will drop to the
point where voltage regulator can no
longer supply enough exciter current
and the generator will shut off. MIMS,
on the other hand, shows a
changeover relay that takes generator
off-line when its output is below 25
VDC.
(3) Physical: consists of transistorized
voltage-sensing, time-delay circuit
and changeover relay
PROGRESS CHECK
Question 1 -- 1.4.4.3.1
In the event of a generator failure, approximately
how long will the batteries supply power?
ANSWER: 27 minutes with two good batteries, 12
minutes with one battery
(8-03) Original
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