Abstract:Turbo power generator Voltage Withstand Test can check the overall insulation level generator, AC voltage Withstand test can be found free of defects generator insulation, insulation aging and during operation, the ability to withstand a variety of over-voltage, AC and DC test through basic can be found in the generator insulation defects, to ensure safe operation of the generator. This article from the AC and DC voltage test method, this paper introduces the 1100MW water-cooled turbo power generator stator coil voltage test methods and some of the test conditions and that should pay attention to. Then according to the test methods described test results, in the final analysis of the test results for some of the problems encountered in the test were also analyzed to identify the test results do not meet the standard requirements of causes. For subsequent large-capacity water-cooled turbogenerator stator coil voltage test can provide some reference.