Überspannungsschutzvorrichtung und Mehrstufige Überspannungsschutzvorrichtung

Details

Veröffentlichungs-Nr.

EP3514907

Aktenzeichen

EP18152270

Anmeldetag

18. Januar 2018

Veröffentlichung

28. August 2024

Erteilung

28. August 2024

Rechtsraum

EP

IPC

H02H9/04H02H9/06

Abstract

A crowbar device is provided. The crowbar device has a first terminal (1) and a second terminal (2), the terminals (1, 2) being connectible to a medium to high impedance AC voltage source (AV), the crowbar device comprising a trigger circuit (B) connected between the first terminal (1) and the second terminal (2) and configured to output a trigger signal responsive to exceeding a threshold voltage across at least one trigger element of the trigger circuit (B); a positive-side signaling circuit (C) and a negative-side signaling circuit (D) configured to output a positive or a negative clamping signal, respectively, according to a positive-voltage or a negative-voltage signal, respectively, input from the trigger circuit (B); and a positive-side overvoltage clamping circuit (E) and a negative-side overvoltage clamping circuit (F) each comprising a controllable semiconductor element (ES, FS) connected between the first terminal (1) and the second terminal (2), the overvoltage clamping circuits (E, F) being configured to control their respective semiconductor element (ES, FS) to be in a conducting state, when the clamping signal from the corresponding signaling circuit (C, D) is present, and configured to control their semiconductor element (ES, FS) to be in a non-conducting state, when the corresponding clamping signal has not been present for a predetermined time period.

Anmelder

Firmen

Hitachi Energy Ltd
Hitachi Energy Switzerland AG
ABB Power Grids Switzerland AG
ABB Schweiz AG

Land

🇨🇭 Schweiz

Fachgebiete