Kabushiki Kaisha Toshiba

Kyoto University

Japan Chemical Engineering & Machinery Co., Ltd.

Tomohiko Mitani

Minoru Saito

Shiro Maruyama

Tadashi Koshizuka

Naoki Shinohara

Takashi Watanabe

Masafumi Oyadomari

Yasunori Ohashi

Yasuhiro Takami

Pradeep Verma

Hisayuki Sego

According to an embodiment, when a transformer that is connected to a first power supply through a first breaker as well as to a second power supply through a second breaker is detected to be disconnected from the power supplies, a specific phase of the three phases of the first breaker is closed to suppress an excitation inrush current, based on calculated residual magnetic fluxes and a voltage of the first power supply, and thereafter, the remaining two phases are closed. Based on the calculated residual magnetic fluxes and a voltage of the second power supply, a specific phase of the three phases of the second breaker is closed to suppress an excitation inrush current, and thereafter, the remaining two phases are closed.

Excitation inrush-current suppression system

Growing community of inventors

Yokohama, Japan

Tomohiko Mitani