H01H33/167

Zero-current pulse with constant current gradient for interrupting a direct current
10332705 · 2019-06-25 · ·

A configuration for generating a zero current pulse for generating a zero current crossing in an electrical component through which a direct current flows, in particular a vacuum interrupter, includes a switch and an electrical energy storage device or store having two poles through which the electrical energy storage device can be charged by a voltage source. A loop can be formed by the energy storage device, the electrical component through which the direct current flows and the switch, so that the energy storage device can be discharged by closing the switch while generating a zero current pulse counter to the direct current across the electrical component. The energy storage device has a plurality of energy storage elements for mutual generation of a zero current pulse.

SWITCH HAVING AN ARC-QUENCHING DEVICE
20190157020 · 2019-05-23 ·

A switching device in a vacuum switching tube or for arc quenching in gases. The switching device has an arc-quenching device. There is also described a method for operating a switching device in a vacuum switching tube or in arc quenching in gases, which switching device has an arc-quenching device for medium-voltage, low-voltage and/or high-voltage applications.

Fault current limiter arrangement
09912141 · 2018-03-06 · ·

A fault current limiter arrangement for a low, medium and high voltage electricity grid, including a fault current limiter unit which is arranged in line with a circuit breaker unit including a fixed electrical contact which is connected to a lower electrical terminal and a movable electrical contact which is connected to an upper electrical terminal, in order to interrupt the current flow after the fault current limiter unit has limited the current flow in a detected fault event. The fault current limiter unit includes a movable electrical sliding contact part which is electrically arranged between the upper electrical terminal of the circuit breaker unit and the movable electrical contact of the circuit breaker unit, and which is movable between a short circuit position adjacent to the upper electrical terminal and a remote position far from the upper electrical terminal for providing a maximum electrical resistance for the current flow.