公开(公告)号：EP3933418A1

公开(公告)日：2022-01-05

申请号：EP20183241.7

申请日：2020-06-30

Applicant: ABB Schweiz AG

Inventor： HENCKEN, Kai ,  MARET, Yannick ,  GEBHARDT, Jörg ,  KAUL, Holger ,  LEHMANN, Jörg ,  KRIVDA, Andrej

IPC: G01R31/12 ,  G01R19/04

Abstract: The present disclosure provides a method for detecting an electrical discharge (1) in an electrical apparatus (5), the method comprises: Sensing an electromagnetic wave (4) using an electrical sensor (101) and generating an electric signal (SE) for a predetermined time period (T1); Sensing an acoustic wave (3) using an acoustic sensor (102) and generating an acoustic signal (SA) for the predetermined time period (T1), said acoustic sensor (102) being associated with at least one compartment (5a) of the electrical apparatus (5); Generating electrical data (201) based on a quasi-periodic characteristic of electric peak sequences of said electrical signal (SE); Generating acoustic data (202) based on a quasi-periodic characteristic of acoustic peak sequences of said acoustic signal (SA); wherein the electrical data (201) is combined with the acoustic data (202) to provide an operation status of the at least one compartment (5a).