IEEE 1310-1996 Historical

A test method to determine the relative ability of high-voltage form-wound stator bars and coils of large rotating machines to resist deterioration due to rapid heating and cooling resulting from machine load cycling is described. The test procedure is primarily intended for machines where the stator windings are indirectly cooled by air. This procedure provides a recommended practice for performance of thermal cycle testing of form-wound stator bars and coils without the use of simulated core. Since thermal cycling tests will result in aging of the insulation of the bar or coil, prototype or spare bars or coils obtained from a normal production run must be used in the test. Thermal cycle testing of bars and coils confined in a simulated core, that would simulate the effects of the core, would require different parameters and therefore is not covered by this procedure.