Do you know how to maintain a generator, if so what are
those maintenances?
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Answer Posted / nabil
Inspection of AC Exciter
Removal of Rotor
(1) Inspection of Stator winding, Stator Wedge Looseness
(2) Inspection of Stator Core
(3) Inspection of Shaft Journal and Shaft Corner by Visual
Inspection, Ultrasonic Examination, Magnetic Particle
Examination
(4) Inspection of Retaining Ring Outer Surface by Ultrasonic
Examination, Penetrate Examination, Visual Inspection
(5) Inspection of End winding
(6) Inspection of Collector Ring, Measuring of Collector
Ring
Groove Depth
(7) Inspection of Rotor Fan and Bolts, Coupling Bolts by
Visual
Inspection, Penetrate Examination, Ultrasonic
Examination
(8) Inspection of Field End winding
(Special) Inspection of AC Exciter
Carrying Rotor into Work Shop and Disassembly of
Retaining Rings
The difference from the 4th year inspection are below.
(1) Inspection of Each Wedge by Fluorescent Penetrant
Examination, Magnetic Particle Examination
(2) Inspection of Retaining Ring Inner Surface by
Ultrasonic Examination, Visual Inspection, Penetrant
Examination
(3) Inspection of Winding in the Slot Section
(4) Replacement of Pole to Pole Connector
(5) Inspection of Main Lead and Insulation cover Inspection
of Bolts by Ultrasonic Examination, Magnetic Particle
Examination
(6) Measuring of Inter Turn Voltage, High Potential Test,
Measuring of Winding Resistance
(7) Inspection of Coupling by Visual Inspection, Ultrasonic
Examination, Penetrant Examination
Overall Inspection for Stator Winding
Removal of Rotor
(1) Inspection of Stator Wedge Looseness
(2) Inspection of Spacer inside Stator Slot Section
(3) Inspection of Bolts for Endwinding Portion, Looseness
of Endwinding Tie, Looseness of Phase Connection Ring etc.
(4) Inspection of Sliding Structure (Water Cooled Stator
Winding)
- Periodical inspection, every month
the carbon brush length, cleaning the brush holder one
by one
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