Do Hipot Tests Damage Rotating Machine Insulation?
Abstract:- Over-potential or hipot tests have been applied for many decades to rotating machine windings to assure that the electrical insulation in windings is fit ...
Abstract:- Over-potential or hipot tests have been applied for many decades to rotating machine windings to assure that the electrical insulation in windings is fit ...
...the various mechanisms yields significant benefits in scheduling priorities for inspection, repairs, and possible locations of deterioration. The application of this partial discharge
Company: Central Canada Utility Machine Description: Air-cooled Generator, 287.66 MVA, 21kV, 2-pole Loose Blocking Revealed by Endwinding Vibration Monitoring In June of 2012, an ...
...turns detection, proper identification of impact of each factor on measurement result is required. High level of vibration has been detected on 74 ...
Abstract – Stator current signature analysis on induction motors is a proven method for diagnosing rotor squirrel cage winding defects and air gap eccentricity problems. ...
...doubling caused by transmission line impedance mismatches, can result in partial discharges (PD) in the motor stator winding even in low voltage motors. Testing
...and is on-line PD testing useful? The short answer is no and yes, respectively. PD is still sometimes present in hydrogen-cooled TGs in spite of the ...
...suffering the most from this problem, which was caused by the introduction of the first thermoset insulation systems and by workmanship variations that were ...
Company: West Canadian Plant Machine Description: 13.8 kV; 90 MW; 3600 rpm, Gas Turbine Generator Manufactured 2010 BUS EMCs (80 pF sensors) CASE STUDY: Effective Maintenance ...
...insulation problem exists by a single on-line measurement. The paper briefly reviews the test method and the PD levels associated with significant insulation ...