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See our article in Power Engineering Magazine Flux Probes Provide On-Line Detection of Generator Shorted Turns "The use of air-gap magnetic flux probes has proven effective in the detection of generator rotor winding shorted turns and has helped to improve the quality of predictive maintenance decisions concerning when or if to perform rotor rework..." Power Engineering September 1999, Volume 103, Issue 9, p. 28-32 |
Generatortech, Inc. specializes in the detection of rotor winding shorted-turns in synchronous generators and motors. This information can help your plant operators and engineers pinpoint the cause of abnormal vibration, assist in major maintenance decisions and verify the quality of rewound rotors. These pages provide information on the theory behind the field winding shorted-turn detection system for round rotor generators. We utilize a similar technique to detect shorted-turns in synchronous salient pole motors and generators.
Generatortech, Inc., as the industry leader in shorted-turn detection and analysis services, offers:
Shorted turns are the result of failed insulation between individual windings in generator rotors and can cause:
In today's highly competitive electrical power market, predictive maintenance is
an effective method of minimizing maintenance costs and downtime.
Monitoring the condition of your rotor windings using the Generatortech,
Inc. flux probe and analysis products will help you make informed
decisions on "when" and "if" to bring a machine
down for a major overhaul and rotor rewinds.
Generatortech. Inc.'s computer analysis program records and analyzes flux probe data, yielding a highly accurate "snapshot" of the rotor winding insulation condition. Our system not only tells you if you have shorted turns in the rotor winding, but it pinpoints which coils are affected and provides an accurate estimate of the number of turn shorts in each coil. We currently have about 400 of our air-gap flux probes in generators worldwide. With this many probes in place, we have been able to confirm the accuracy of our analysis system many times. When rotors with shorted turn indications have been inspected during rotor rewinds or retaining ring replacements, we have found excellent agreement with our on-line shorted turn indications.
Generatortech, Inc. performs full service installation, testing and analysis with reporting and trend analysis. Although moderately complex, Generatortech, Inc. can train power plant personnel to perform installations, testing and analysis on their own. Some plant operators choose to take their own test data and have the analysis performed by Generatortech, Inc. Generatortech, Inc. recommends baseline testing of new or rewound rotors and a continuing program of periodic testing for predictive maintenance evaluations.
Copyright © 2003, Generatortech, Inc. All rights reserved.