Generator Services
Generator Overhaul
Integrated mechanical and electrical overhaul services covering generator rotor, stator, bearings, insulation systems, excitation-related components, inspection, testing and return to service.
Supporting turbine-generator units across power generation and industrial facilities in Indonesia.
Mechanical + Electrical
One Generator. Two Critical Dimensions.
A generator overhaul requires both mechanical precision and electrical condition assessment. Rotor, stator, bearings, clearances, insulation and excitation-related components must be evaluated as one integrated system.
Mechanical
Rotor · Bearings · Air Gap · Alignment
Electrical
Stator · Rotor Winding · Insulation · Excitation · Testing
Generator Reliability
Generator Rotor
Removal, inspection and measurement of the generator rotor to evaluate mechanical and electrical condition during overhaul.
Mechanical Scope
- Rotor removal and lifting
- Rotor surface inspection
- Shaft and journal inspection
- Rotor condition assessment
- Coupling inspection
- Dimensional checks
- Cleaning
Electrical Inspection / Testing
- Rotor winding inspection
- Insulation condition checks
- Electrical testing
- Connection inspection
- Excitation-related component inspection
Stator & Core
Detailed inspection of stator windings, core, slots, connections and internal condition to identify deterioration, contamination, looseness or visible damage.
- Stator winding visual inspection
- Stator core inspection
- Slot and wedge inspection
- End-winding inspection
- Connection inspection
- Contamination assessment
- Cleaning
- Insulation condition assessment
Bearings & Shaft System
Mechanical condition of the generator bearing and shaft system is evaluated together with turbine-generator alignment requirements.
- Generator bearing inspection
- Bearing surface inspection
- Journal inspection
- Bearing clearance measurement
- Contact condition assessment
- Shaft condition inspection
- Coupling condition inspection
- Adjustment or repair as required
Air Gap & Alignment
Small Deviations Matter.
Generator air-gap condition, rotor position and shaft alignment are important mechanical parameters during overhaul and reassembly.
- Air-gap measurement
- Rotor position verification
- Coupling alignment
- Shaft-line checks
- Bearing position verification
- Final alignment confirmation
Insulation & Electrical Testing
Electrical testing helps evaluate generator winding and insulation condition before the unit is returned to operation.
Testing scope is determined according to generator type, equipment condition and project requirements.
Excitation & AVR-Related Inspection
Relevant excitation and AVR-related components can be inspected and functionally verified as part of the generator overhaul and commissioning scope.
Test. Measure. Understand. Then Decide.
Mechanical inspection results and electrical test data are reviewed together to determine appropriate overhaul actions.
Acceptable
Within tolerance — no action required
Clean / Adjust
Contamination or minor deviation — clean or recalibrate
Repair Required
Damaged or deteriorated — execute repair procedure
Replacement Recommended
Beyond repair — source and replace component
Generator Repair & Restoration
Based on inspection and testing results, appropriate corrective work can be implemented according to actual generator condition and project requirements.
Mechanical
- Bearing repair
- Journal-related corrective work
- Component restoration
- Coupling-related work
- Mechanical adjustment
Electrical
- Insulation-related corrective work
- Connection repair
- Winding-related repair where applicable
- Excitation-component repair/replacement where applicable
Cleaning & Internal Condition
Contamination can directly affect electrical equipment condition. Professional cleaning is an important part of generator overhaul.
Precision Reassembly
Inspection Finds the Condition. Reassembly Restores the Machine.
- Rotor installation
- Bearing installation
- Air-gap verification
- Coupling alignment
- Electrical connection restoration
- Excitation-related reconnection
- Internal final inspection
- Mechanical final checks
Testing & Return to Service
Final mechanical and electrical checks confirm the generator's readiness before and during return to operation.
READY FOR RETURN TO SERVICE
The overhaul is completed only after the generator has been inspected, tested and verified for return to operation.
Generator Overhaul Scope
One Shaft Train
Turbine and Generator Should Not Be Treated in Isolation.
During a turbine-generator overhaul, generator mechanical condition, bearings, coupling and alignment must be considered together with the turbine shaft train.
Proven in the Field
Generator Overhaul Experience
60 MW Turbine-Generator Major Overhaul
Jambi, Indonesia
Capacity
60 MW
Scope
Turbine + Generator
Project
Major Overhaul
Schedule
30 Days
Your Next Overhaul
Planning a Generator Overhaul?
Send us the generator manufacturer, model, capacity, operating history, known issues, planned outage date and preliminary scope. Our team can review the requirements with you.