发明名称 Protective relay device
摘要 Data from a digitizing unit is stored in a time-series data buffer, via a data receiving circuit. The data on which a digital filtering process is performed by a digital filtering processing circuit is stored in time series in a time-series instantaneous-value data storing circuit. A digital computing unit sets a time of temporally oldest data from among a group of latest time data stored in a latest time-data storing circuit as a reference time, extracts time data having the same time as the reference time from the time-series instantaneous-value data storing circuit, and then performs a digital computation.
申请公布号 US8155796(B2) 申请公布日期 2012.04.10
申请号 US20090489835 申请日期 2009.06.23
申请人 USUI MASAJI;MITSUBISHI ELECTRIC CORPORATION 发明人 USUI MASAJI
分类号 H02H3/00 主分类号 H02H3/00
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