T-45C TS, ADV & IUT ENG-02
Electrical System
b.
Generator Fail and Inverter No. 2 Power Input
Sg 1, fr 13
Relay
Fig 2: Electrical
System Block Diagram
(1) On aircraft 165456 and below without AFC
-- AC Power Relays
Removed
199 -- relays disconnect one inverter
illuminating the AC INV caution light when
the generator fails
(2) On aircraft 165457 and up and on aircraft
165456 and below with AFC 199
incorporated
(a) Relays are removed, and both
inverters are wired directly to the
28 VDC essential services bus
(b) Both inverters remain on-line and AC
INV caution does not illuminate with a
generator failure
c.
Three contactors provide bus connection to
battery and external power
Figure 2: ELECTRICAL SYSTEM BLOCK DIAGRAM -- AC POWER RELAYS REMOVED
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Change 4 (9-98)
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