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公开(公告)号：EP4297216A1
公开(公告)日：2023-12-27
申请号：EP22180636.7
申请日：2022-06-23
申请人： ABB SCHWEIZ AG
摘要： A start-up method for reducing inrush current to a transformer (3) when closing a switching device (2). The switching device comprises three single-pole operated current interrupting means. The method comprises monitoring a voltage (U). The method comprises, for each of a sequence of iterations: at a same opening angle relative to a reference angle of the voltage, starting an opening sequence of the switching device; at a closing angle relative to the reference angle, which is shifted in relation to the closing angle of all other iterations in the sequence, starting a closing sequence of the switching device; and obtaining an indication of the overall inrush current resulting from the closing. The method comprises selecting for future use with said opening angle, the closing angle of one of the iterations in which the overall inrush current is relatively low when compared with the other iterations of the sequence.
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公开(公告)号：EP3879548A1
公开(公告)日：2021-09-15
申请号：EP20162221.4
申请日：2020-03-10
申请人： ABB Schweiz AG
发明人： MAGNUSSON, Jesper , NOHLERT, Johan
IPC分类号： H01H9/54
摘要： The present disclosure relates to a method of operating a Fault Current Limiter Circuit Breaker (FLCB) (1) comprising a plurality of FLCB modules (2) connected in series, including at least a first module (2a) and a second module (2b). Each module comprises a plurality of parallel component legs comprising a mechanical switch leg (3) comprising a mechanical switch (3a), a semiconductor switch leg (4) comprising a semiconductor switch (4a; 4b), and a Metal Oxide Varistor (MOV) leg (5) comprising a MOV (5a). The method comprises, when the FLBC is in an open configuration, obtaining an indication that the FLCB should be closed; in response to the obtained indication, closing the semiconductor switch of each of the modules; and, after the closing of the semiconductor switches and while the mechanical switch of the second module remains open, closing the mechanical switch of the first module.
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公开(公告)号：EP4297215A1
公开(公告)日：2023-12-27
申请号：EP22180635.9
申请日：2022-06-23
申请人： ABB SCHWEIZ AG
摘要： The present disclosure relates to a method of operating a switching device (2) in a system (10). The method comprises monitoring a voltage (U); operating the system at each of a plurality of system configurations; and, for each of the system configurations and a predetermined same opening angle relative to a reference angle of the monitored voltage, determining a suitable closing angle relative to the reference angle and storing information about said determined suitable closing angle in association with the system configuration in a database. The method then comprises, determining a system configuration in the system; at the predetermined same opening angle, opening the switching device; from the database, obtaining a closing angle of said determined suitable closing angles, wherein the system configuration with which the obtained closing angle is associated in the database corresponds to the determined system configuration; and at the obtained closing angle, closing the switching device.
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公开(公告)号：EP4297214A1
公开(公告)日：2023-12-27
申请号：EP22180633.4
申请日：2022-06-23
申请人： ABB SCHWEIZ AG
摘要： The present disclosure relates to a start-up method for reducing inrush current to a transformer (3) when closing a switching device (2). The method comprises monitoring a voltage (U) in one of the phases. The method also comprises, for each of a sequence of iterations: at a same opening angle relative to a reference angle of the monitored voltage, opening the switching device; at a closing angle relative to the reference angle, which is shifted in relation to the closing angle of all other iterations in the sequence, closing the switching device; and obtaining a peak value of the overall inrush current resulting from the closing. The method also comprises selecting for future use with said same opening angle, the closing angle of one of the iterations in which the overall inrush current is relatively low when compared with the other iterations of the sequence.
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