SWITCHGEAR CONTROL APPARATUS

申请公布号：

CA2609039(C)

申请号：

CA20072609039

申请日期：

2007.10.30

申请公布日期：

2012.03.20

申请人：

MITSUBISHI ELECTRIC CORPORATION

发明人：

KOYAMA, HARUHIKO;MORI, TOMOHITO;KAMEI, KENJI;KINOSHITA, SADAYUKI

分类号：

H02H3/06;H01H71/66;H02H7/26

主分类号：

H02H3/06

摘要：

A switchgear control apparatus includes a zero point interval detecting circuit, an interruption time judgment circuit and a reclosing time decision circuit. The zero point interval detecting circuit detects time intervals between successive zero points of a main circuit current. The interruption time judgment circuit judges that interruption time of the main circuit current is time of a zero point immediately preceding a zero point at which a difference between the time interval between two successive zero points and half the period of a commercial AC voltage exceeds a specific value. Upon detecting the gradient of the main circuit current at the interruption time, the reclosing time decision circuit sets reclosing time at a point in phase where the AC voltage has a maximum negative value if the gradient is positive, and at a point in phase where the AC voltage has a maximum positive value if the gradient is negative.