This equipment allows inter-turn and earth faults in the rotor windings of large electrical generators to be detected and located by a simple, rapid and safe low voltage test.

The test may be carried out with the unexcited rotor winding stationary or at speed and is therefore particularly useful for detecting and locating faults which are speed dependent.

Typical applications include the routine testing of generators by power utilities and the monitoring by manufacturers and repairers of the rotor winding during its initial fabrication and any subsequent repair. The Reflectometer may be left permanently connected to the rotor winding during re-insulation work, so that any defects are immediately apparent.