Flowchart procedure to assess the condition of turbine generator insulation

A method using flowcharts to indicate a step-by-step procedure to assess the insulation condition of turbine generators is presented. Information on likely deterioration processes which arise from the insulation-system characteristics and operating practices is collected. Online monitoring and offline tests are done to determine if problems could be occurring. Depending on the outcome of the previous steps, more extensive tests and detailed inspections usually requiring significant outages are performed. Although the procedure itself is straightforward, it is best implemented by engineers with considerable experience in this field. The flowcharts indicate to nonexperts the complexity of reliably assessing insulation condition