Manual for Induction Motors and Generators
Maintenance -
61
3BFP 000 050 R0101 REV E
7.3.1.3 Stator and rotor
NOTE: It is not recommended that totally enclosed machines are dismantled and inspected
internally more often than every 3-5 years (L3).
7.3.1.4 Auxiliaries
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, turn insulation test,
(high voltage test)
Stator coil over hangs
V
V
V
V
Insulation damages
Stator coil supports
V
V
V
V
Insulation damages
Stator slot wedges
V
V
V
V
Movement, tightness
Stator terminal bars
V
V
V
V
Fixing, insulation
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
Rotor balancing weights
V
V
V
V
Movement
Shaft
V
V
V
V
Crack, corrosion
Connections in rotor
V
V
V / T
V / T
Fixing, general condition
Earthing brushes
V
V
V
V
Operation and general condition
Maintenance object
L1
L2
L3
L4
Check / Test
Pt-100 elements (stator,
cooling air, bearing)
V
V / T
V / T
V / T
Resistance
Anticondensation heaters
V
V / T
V / T
V / T
Operation, insulation resistance
Encoders
V
V
V / T
V / T
Operation, general condition, alignment
Auxiliary terminal boxes
V
V / T
V / T
V / T
General condition, terminals, wiring condition
