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1.发明申请公开(公告)号：US20170148300A1
公开(公告)日：2017-05-25
申请号：US15353749
申请日：2016-11-17
Applicant: ABB Schweiz AG
Inventor： Marcel Stupak , Tomas Kozel , Massimo Scarpellini , Stefano Magoni
CPC classification number: G08B21/182 , G01K13/00 , G01N25/72 , G01R31/3274 , G01R31/3275 , H02B1/04 , H02B1/06 , H02B1/20 , H02B1/24 , H02B11/12 , H02B13/025 , H02B13/035 , H02B13/065
Abstract: A method for loose joint detection in medium voltage switchgears with busbar joints, circuit breaker upper and lower spouts, and cable connection joints, arranged in an air insulated housing, and medium voltage switchgear itself, in order to create an effective loose joint detection with lower operating expense, but with high performance and accuracy, involves measuring actual temperatures at a first phase as a first temperature (T1), at a second phase as a second temperature (T2), at a third phase as a third temperature (T3), at predefined critical points, such as at the busbar joints, and/or at the circuit breaker upper spouts, and/or at the circuit breaker lower spouts, and/or the cable connection; and comparing temperatures in a logical dependency Ti>(Tj+dT), with i≠j, permuted with i from 1, 2, 3, and j from 1, 2, 3, and setting the alarm if the logical dependency is fulfilled.
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2.发明申请公开(公告)号：US20170146471A1
公开(公告)日：2017-05-25
申请号：US15353750
申请日：2016-11-17
Applicant: ABB Schweiz AG
Inventor： Marcel Stupak , Tomas Kozel , Massimo Scarpellini , Stefano Magoni
IPC: G01N25/72 , H02B1/24 , H02B13/025 , H02B13/035 , H02B1/20 , H02B1/06
Abstract: A method for loose joint detection in medium voltage switchgears with busbar joints, circuit breaker upper and lower spouts, and cable connection joints, arranged in an air insulated housing, and medium voltage switchgear itself, in order to create an effective loose joint detection with lower operating expense, but with high performance and accuracy, involves measuring actual temperatures at a first phase as a first temperature (T1), at a second phase as a second temperature (T2), at a third phase as a third temperature (T3), at predefined critical points, such as at the busbar joints, and/or at the circuit breaker upper spouts, and/or at the circuit breaker lower spouts, and/or the cable connection; and comparing temperatures in a logical dependency Ti>(Tj+dT), with i≠j, permuted with i from 1, 2, 3, and j from 1, 2, 3, and setting the alarm if the logical dependency is fulfilled.
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3.发明授权公开(公告)号：US10741051B2
公开(公告)日：2020-08-11
申请号：US15353750
申请日：2016-11-17
Applicant: ABB Schweiz AG
Inventor： Marcel Stupak , Tomas Kozel , Massimo Scarpellini , Stefano Magoni
IPC: G01N25/72 , G08B21/18 , H02B13/065 , G01K13/00 , G01R31/327 , H02B1/04 , H02B1/20 , H02B1/24 , H02B1/06 , H02B13/025 , H02B13/035 , H02B11/12
Abstract: A method for loose joint detection in medium voltage switchgears with busbar joints, circuit breaker upper and lower spouts, and cable connection joints, arranged in an air insulated housing, and medium voltage switchgear itself, in order to create an effective loose joint detection with lower operating expense, but with high performance and accuracy, involves measuring actual temperatures at a first phase as a first temperature (T1), at a second phase as a second temperature (T2), at a third phase as a third temperature (T3), at predefined critical points, such as at the busbar joints, and/or at the circuit breaker upper spouts, and/or at the circuit breaker lower spouts, and/or the cable connection; and comparing temperatures in a logical dependency Ti>(Tj+dT), with i≠j, permuted with i from 1, 2, 3, and j from 1, 2, 3, and setting the alarm if the logical dependency is fulfilled.
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