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 ELECTRICAL
Motors and Generators-Continued
n Protective Equipment:
dirty
signs of arcing
symptoms of faulty operation
improper condition of contacts
burned-out pilot lamps
burned-out fuses
SHUTDOWN INSPECTION (while equipment is not in operation and is
electrically disconnected. A shutdown inspection includes a running inspection.)
n Stators:
dirt
debris
grease
coils not firmly set in slots
burns
tears
aging
embrittlement
moisture in insulation
clogged air slots
rubbing
corrosion
loose laminations of stator-iron
charred or broken slot wedges
abrasion of insulation or chafing in slots
signs of arcing or grounds
n Rotors:
difficult turning
rubbing
excessive bearing friction
7-34
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