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'Method for predicting the maintenance of an intelligent electronic device, system for establishing and maintaining reliability models and system for monitoring the operating conditions of an intelligent electronic device'
'Method for predicting the maintenance of an intelligent electronic device, system for establishing and maintaining reliability models and system for monitoring the operating conditions of an intelligent electronic device'
Predictive maintenance systems and methods are described. A method includes measuring environmental conditions using a plurality of sensors within the IED, processing the environmental measurements to determine long-term exposure factors representing historical operating conditions of the IED, applying a reliability model to the long-term exposure factors, determining a numerical measure of IED life based on the long-term exposure factors and the reliability model, comparing the numerical measure of IED life to preselected boundary values, and signaling if the numerical measure of IED life is outside of the preselected boundary values.
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