T-45C TS, ADV & IUT ENG-02
Electrical System
b.
Description: controls generator output to match
electrical loads
Overlay 5
2.
Overvoltage unit
Overvoltage Unit
a.
Location: under floor equipment compartment,
right side of aircraft
b.
Description: monitors generator voltage and
takes generator off-line if output voltage
exceeds 30.2 VDC
3.
Undervoltage unit
Overlay 6
Undervoltage Unit
a.
Location: under floor equipment compartment,
right side of aircraft
b.
Description
(1) At 25 volts or less deenergizes, illuminating
the GENERATOR warning light
(a) On aircraft 165456 and below without
AFC 199
(i)
Activates relay disabling one
inverter illuminating AC INV
caution light
(ii) Activates relay disconnecting non-
essential AC bus
(b) On aircraft 165457 and up and on
aircraft 165456 and below with AFC
199 incorporated
(i)
Both inverters remain on-line and
AC INV caution does not
illuminate
(ii) Activates relay disconnecting non-
essential AC bus
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