Schutz eines Überspannungsableiters mit Verbessertem Schutz gegen Ausfälle durch Thermische Überlastung im Fall einer Vorübergehenden Überspannung in einer Stromnetzleitung

Details

Veröffentlichungs-Nr.

EP3293839

Aktenzeichen

EP17188606

Anmeldetag

30. August 2017

Veröffentlichung

22. Mai 2024

Erteilung

22. Mai 2024

Rechtsraum

EP

IPC

H01T1/14H01H39/00

Abstract

This disclosure concerns a method for preventing an electrical grid from a failure in case of a temporary overvoltage. The method comprising the following steps: a) providing an electrical grid line (139), a surge arrester (140) and a disconnector device (10, 100) with a disconnector unit (25); b) connecting the surge arrester at one terminal to the electrical grid line (139); c) connecting the surge arrester at its other terminal to a second terminal of the disconnector device; d) connecting a first terminal (30) of the disconnector device to ground potential (37); e) interrupting the electrical connection in between the electrical grid line (139) and the ground potential (37) in case of a temporary overvoltage; f) protecting the surge arrester from failure due to a thermal overload caused by the temporary overvoltages by operating the disconnector device (10, 100) before the surge arrester fails due to a thermal overload of the surge arrester (140).

Anmelder

Firmen

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

Land

🇨🇭 Schweiz

Fachgebiete