... hybrid direct current (DC) circuit-breaker for high-voltage direct current (HVDC) transmission. It interrupts the current flow with very fast mechanics and low-loss power electronics in less than five milliseconds and for the first time enables the interruption of DC fault currents without shutting down the entire system. In addition, the DC circuit-breaker is also the basis for setting up DC networks with several protection zones. This means that in the event of a fault, the relevant parts of the network can be switched off and the non-faulty sections can continue to operate. That leaves the subject of drive technology: ABB provides ...