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 TM 55-1905-220-14-10
5-32. GENERATOR (40 KW) - MAINTENANCE INSTRUCTIONS (Continued).
LOCATION
ITEM
ACTION
REMARKS
TESTS (Cont)
c. Alter-
1. Check insulation
See table for
nator
resistance.
resistance
arma-
limits on page
ture
2. Inspect for loose
coils and insula-
tors.
3. Inspect for breaks
Tape and varnish
or worn spots in
all breaks.
leads.
d. Exciter
arma-
ture
NOTE
An open or shorted armature may be detected by measuring the
phase to phase resistance at the armature terminals.
1. Detach all three
See table for
armature leads at
resistance
the rotating
limits on page
rectifier assembly,
check resistance.
NOTE
An open armature may indicate an overload condition or a
defective rotating rectifier assembly.
CAUTION
The insulation test must be done with three exciter armature
leads disconnected from the rotating rectifier assembly,
otherwise, the rectifiers could be damaged.
5-491
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