Fecha de publicación: 04/03/2021 Fuente: Wipo "BigData" An apparatus and a method for analyzing a cause of a failure due to a dielectric breakdown based on big data are provided. A failure cause factor data set, a normal state data set, or a state recovery data set is generated and transmitted to a big data server when a dielectric resistance value is measured to be a minimum normal value or less. A cause of a failure is analyzed by receiving data corresponding to the data sets from the big data server, calculating influence indexes for failure cause factors, and selecting a failure cause factor based on the basis of the influence indexes.