Publication: IEICE TRANSACTIONS on Electronics Publication Date: 2008/08/01 Vol. E91-CNo. 8pp. 1299-1305 Type of Manuscript: Special Section PAPER (Special Section on Recent Development of Electromechanical Devices(Selected Papers from IS-EMD2007)) Category: Contactors & Circuit Breakers Keyword: vacuum circuit breaker, sliding time window, ANN (artificial neural network), mechanical fault prediction,