Generator Rotor Rewinding


Defective 15MW Generator rotor was rewound and brought back to design parameters with state of art rewinding technology. Condition of the rotor was assessed by diagnosis tests and noticed weak ground insulation and inter turn shorts. Reengineering of the winding, slot contents, end winding bracers assembly and rewinding had been carried. Clean room had been constructed in workshop for rewinding job.

Hot pressing and reshaping assembly arrangement was made exclusively for this rotor. NDT tests on rings had been performed. Rings were assembled with ground insulation composite layers. Tests such as IR, PI, OR, AC Imp, RSO and PD are performed to assess the status of winding before and after high speed balancing. Test results satisfied healthy status of winding.


Test Equipments
  • Winding Restence Meter
  • Wedge Deflection
  • Thermo vision camera
  • Tan Delta test set
  • Megger
  • Sfra
  • Resistance Measurement
  • DC HIPOT KIT (75kV-20mA)
  • Digital ELCID
  • Corona Probe
  • Digital RSO
  • Thermo Vision Camera
  • SFRA
  • Surge Comparison
  • Automatic Turns Ratio Meter
  • Boro Scope
  • Harmonic Analyzer
  • DC HV
  • Wedge Deflection
  • Winding Resistance Meter
  • IR & PI
  • PD Analyzer
  • RSO
  • Tan Delta/ Capacitance Measurement
List of Equipment with MRTG