Schutzschalter

Details

Veröffentlichungs-Nr.

EP4738416

Anmeldetag

31. Oktober 2024

Veröffentlichung

6. Mai 2026

Rechtsraum

EP

IPC

H01H33/70, H01H33/91

Abstract

The invention relates to a circuit-breaker (1), comprisinga gas compression arrangement (4) configured for compressing a quenching gas to be contained therein and which quenching gas is free of sulphur hexafluoride;a first contact (20) and a second contact (30) movable relative to one another along a switching axis (2);a nozzle (40) providing an inflow channel (IN) connecting the gas compression arrangement (4) to an arc zone (3), the inflow channel (IN) constituting a minimal inflow area to be passed by the quenching gas, the nozzle (40) radially restricting the arc zone (3) between the first contact (20) and the second contact (30);wherein, for the quenching gas to exit the arc zone (3), the circuit-breaker (1) provides at least one outlet (OUT1, OUT2) constituting a minimal outflow area, andthe minimal inflow area divided by the minimal outflow area defines an inflow-outflow-ratio being at least 0.5.

Anmelder

Firma

Hitachi Energy Ltd

Land

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