OVERVOLTAGE SUPPRESSION METHOD AND DEVICE |
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| 申请号 | EP13833401 | 申请日 | 2013-08-21 | 公开(公告)号 | EP2892070A4 | 公开(公告)日 | 2016-05-11 |
| 申请人 | TOSHIBA KK; | 发明人 | KOSHIZUKA TADASHI; MARUYAMA SHIRO; SAITO MINORU; MATSUOKA HIROYUKI; | ||||
| 摘要 | Current measurement means inputs single-phase current that is output from current measurement equipment and calculates (current measurement step) the current flowing in the ganged three-phase operation breaker when the ganged three-phase operation breaker interrupts the inductive load. Based on the measurement results of this current measurement equipment, phase detection means detects (phase detection step) a first interrupting phase selected from the three phases of the ganged three-phase operation breaker and the current interrupted point of this first interrupting phase. An open command output means sets a contacts-opening range between the time point obtained by back-calculation of the minimum arcing time for which current interruption is feasible without generating reignition and the current zero-point in the phase that is advanced by 120° phase from the first interrupting phase, starting from the current interrupted point as a base point, and outputs an open command to the three-phase breaker in this contacts-opening range (open command output step). | ||||||
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| 说明书全文 | |||||||
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