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Table 7-4. Maintenance objects for cable connection.
Maintenance
object
L1
L2
L3
L4
Check / Test
Cabling
V
V/T
V/T
V/T/D Wear, fastening
Connections
V
V/T
V/T
V/T/D Oxidation, fastening
Terminal box
V
V
V
V
General condition
Cable transits
V
V
V
V
Condition of cables
entering the machine and
inside the machine
Table 7-5. Maintenance objects for stator and rotor.
Maintenance
object
L1
L2
L3
L4
Check / Test
Stator core
V
V
V
V/C
Fixing, cracks, welds
Stator winding
insulation
V
V/T
V/T/C
V/T/C
Wear, cleanliness,
insulation resistance,
(high voltage test)
Stator coil
overhangs
V
V
V
V
Insulation damages
Stator coil
supports
V
V
V
V
Insulation damages,
tightness
Stator slot wedges
V
V
V
V
Movement, tightness
Stator terminal
bars
V
V
V
V
Fixing, insulation
Stator cable
terminal
fastenings and
crimps
V
V/T
V/T
V/T
Tightness, condition
Instrumentation
V
V
V
V
Condition of cables and
cable ties
Rotor winding
insulation
V
V/T
V/T/C
V/T/C
Wear, cleanliness,
insulation resistance,
voltage drop test
Rotor coil
supports
V
V
V
V
Movement, bending
Rotor balancing
weights
V
V
V
V
Movement, fixing
Damper bars
V
V/T
V/T
V/T
Cracks, corrosion, ultra
sound and knocking test
Shaft
V
V
V
V
Cracks, corrosion
Air gap
V
V
V
V
Cleanliness, equality
Connections in
rotor
V
V
V/T
V/T
Fixing, general condition
