Buchanan Ingersoll & Rooney PC
Phase-control switching apparatus and switching control method for phase-control switching apparatus
A residual-magnetic-flux calculating unit includes a voltage-change-rate detecting unit that detects a transformer-voltage change rate from a phase voltage between a breaker and a transformer, a residual-magnetic-flux detecting unit that detects a residual magnetic flux remaining on the transformer based on the phase voltage, and a breaker-switching-state identifying unit that detects a switching state of the breaker. The residual-magnetic-flux calculating unit recalculates the residual magnetic flux based on the transformer-voltage change rate and a predetermined threshold while the breaker is in an open state.
Mitsubishi Electric Corporation
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additional inventional inventional
Haruhiko Kenji Tomohito Sadayuki
Koyama Kamei Mori Kinoshita