Generator Rotor Inspection, Testing & NDT: A Complete Guide
Background Large utility turbine-driven generators rely on the rotor (field) winding to produce the rotating magnetic…
Generator Thermal Sensitivity Test | Rotor Vibration Diagnosis
Introduction Vibration that increases proportionally with rising excitation (field) current is a classic symptom of thermal…
Brushless Exciter Testing on Large Utility Generators
Introduction Brushless exciters are the standard excitation system on modern large utility generators. They convert a…
Rotor Radial Stud Seal Testing: Procedure, Standards & Repairs
Introduction In hydrogen-cooled large utility generators, the rotor field winding is supplied with excitation current through…
Flux Probe Test for Generator Rotors: Detect Shorted Turns
Introduction The rotor (field) winding of a large utility generator is subject to extreme centrifugal forces,…
Recurrent Surge Oscillography (RSO) Test Explained
INTRODUCTION The rotor (field) winding of a large utility generator is subject to severe mechanical, thermal,…
Generator Rotor Pole Drop Test: Procedure & Interpretation
Introduction The rotor (field) winding of a large utility generator consists of multiple poles connected in…
500 Volt Megger & Polarization Index Test on Generator Rotors
Introduction The rotor (field) winding of a large utility generator operates at relatively low DC excitation…
AC Impedance Testing for Generator Rotors Explained
Introduction The rotor (field) winding of a large utility generator is a critical component that must…