Safety-controlled high-voltage DC power cut-off device

Abstract

The invention relates to a high-voltage direct current switching device (1), comprising: - a main circuit (16); - a switching module (18), comprising the following branches connected in parallel: - a main branch (24) including a main switching device (26); - a switching branch (32) comprising several switching modules (34) in series, one of which comprises: - a switching capacitor (38) for current flow in the switching branch (32); - a switching switch (41, 42) in series with the switching capacitor (38); - a loop formed by the main branch (24) and the switching branch (32); - a control system (561) for closing the switch and discharging the switching capacitor (38) in said loop; - the switching module (18) comprising a surge suppressor (30) for conduction when the main branch and the switching branch are open.Figure to be published with the abbreviation: Fig. 1.