Patent ID: 7254514

Claim:
A method for determining a remaining time before failure of a monitor system, the method comprising: acquiring historical motor data associated with the motor system, in a computer; obtaining operational parameter data from a tan delta sensor operably coupled to the motor system; uploading the operational parameter data to the computer; performing failure analysis based on a composite of reliability probability distributions corresponding to predetermined sub-populations of historical motor system failure causes indicated in the historical motor data; developing a causal network for modeling reliability of one or more motor system components, and assessing motor system component condition based on the causal network and the operational parameter data; and performing an integrated casual network and reliability analysis of the motor system, wherein results from the performing failure analysis are intergrated with results from the assessing motor system component condition based on the causal network to compute a quantitive value for the time remaining before failure of the motor system with an ascertained statistical confidence; and displaying the quantitative value for the time remaining before failure of the motor system on a display device.