Benefits of Testing Online and At-Speed

Generatortech Rotor Winding Shorted Turn Flux Probe testing is the most comprehensive testing that can be performed on your generator.

Standstill testing will miss turn shorts that are either temperature- or speed-dependent. Generatortech equipment is used in high-speed balance pits around the world and testing at various speeds and rotor temperatures have proven the existence of both temperature- and speed-dependent turn shorts. On-line flux probe testing has the rotor at its rated speed and normal operating temperature which shows you the rotor condition when it matters most.

Images below show a flux probe test in a high-speed balance test. No turn shorts were seen at up to 1250 RPM, however, three turn shorts developed by the time the rotor reached its rated speed of 3600 RPM.

See the table below for a comparison of different rotor winding tests.