THE REALITY OF P.D.A. TESTING

摘要

PDA testing is an excellent means of monitoring insulation condition over time and assessing maintenance requirements. PDA trending data and specific test data, used in conjunction with known unit parameters such as. manufacturer, year of commissioning, total slot forces, operational experience, winding temperature profile, environmental condition. Can be used to assess units probable immediate outcome, for a 5 to 10 year horizon. Thus impact of possible failure scenario can be qualitatively evaluated. Suppliers can use it to assess improvements achieved during the development of new insulation systems. The initial 22 years of experience with PDA testing suggests that modem Thermoset insulated stator windings should be purchased on an evaluated basis. Not by price alone. To purchase by price alone, will significantly increase the probability of experiencing "unpleasant surprises" (random failures).