Schutzschalter mit Feldableitungselement

Details

Veröffentlichungs-Nr.

EP3926654

Aktenzeichen

EP20180415

Anmeldetag

17. Juni 2020

Veröffentlichung

6. Dezember 2023

Erteilung

6. Dezember 2023

Rechtsraum

EP

IPC

H01H33/70H01H33/24

Abstract

A gas-insulated high or medium voltage circuit breaker (100) comprises a pin contact (120) and a second contact (130) being configured to be moveable with respect to each other along a longitudinal axis (190) of the circuit breaker (100) between an open and a closed configuration of the circuit breaker, the pin contact (120) and the second contact (130) defining an arcing region (180) in which an electrical discharge (160) is formed during a current breaking operation; and an auxiliary nozzle (150) comprising an electrically insulating material that at least partially surrounds the second contact (130), a main nozzle (110) comprising an electrically insulating material that encloses the auxiliary nozzle at least partially, and a heating channel (140) provided between the auxiliary nozzle and the main nozzle, wherein the heating channel separates the auxiliary nozzle from the main nozzle axially and radially and enables a fluid communication between the arcing zone (180) and an upstream pressure volume (155), wherein at least one conductive element (360) is embedded within the insulating material of the main nozzle (110) and is electrically floating, wherein the at least one conductive element (360) is arranged around the arcing region (180) and is configured to generate an electrical field due to the presence of an electrical discharge (160) in the arcing region (180), the electrical field being configured for deflecting the electrical discharge (160) which propagates from the pin contact (120) along an inner surface (175) of the main nozzle (110) towards the second contact (130).

Anmelder

Firmen

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

Land

🇨🇭 Schweiz

Fachgebiete