DC CUTOFF DEVICE

PROBLEM TO BE SOLVED: To provide a DC cutoff device that enables bi-directional current blocking and that can suppress arcs in an open state of a mechanical contact without using a semiconductor switch.SOLUTION: A cathode of a first diode D1 is connected with a positive terminal of a first DC system 1. One end of a first mechanical circuit breaker CB1 is connected with a common connection point of the first DC system 1 and the first diode D1. A capacitor C is connected between the other end of the first mechanical circuit breaker CB1 and an anode of the first diode D1. An anode of a second diode D2 is connected with a common connection point of the capacitor C and the first diode D1. A second mechanical circuit breaker CB2 is connected between a common connection point of the capacitor C and the first mechanical circuit breaker CB1 and a cathode of the second diode D2. A common connection point of the anode of the second diode D2 and the second mechanical circuit breaker CB2 is connected with a positive terminal of a second DC system 2.SELECTED DRAWING: Figure 1 【課題】双方向の電流遮断が可能で、かつ、半導体スイッチを用いずに機械接点開極時のアークを抑制できる直流遮断装置を提供する。【解決手段】第１直流系統１の＋端子に第１ダイオードＤ１のカソードが接続される。第１直流系統１と第１ダイオードＤ１の共通接続点に第１機械遮断器ＣＢ１の一端が接続される。第１機械遮断器ＣＢ１の他端と第１ダイオードＤ１のアノードとの間にコンデンサＣが接続される。コンデンサＣと第１ダイオードＤ１の共通接続点に第２ダイオードＤ２のアノードが接続される。コンデンサＣと第１機械遮断器ＣＢ１の共通接続点と第２ダイオードＤ２のカソードとの間に第２機械遮断器ＣＢ２が接続される。第２ダイオードＤ２のアノードと第２機械遮断器ＣＢ２との共通接続点が第２直流系統２の＋端子に接続される。【選択図】図１