Nozzle for high or medium voltage circuit breaker

A gas-insulated high or medium voltage circuit breaker comprising:

• a first arcing contact and a second arcing contact, wherein at least one of the two arcing contact is axially movable along a switching axis, an arc between the first arcing contact and the second arcing contact being formed in an arcing region during a breaking operation;
• a buffer housing defining a pressurizing volume;
• a nozzle arranged at a nozzle side of the pressurizing volume, the nozzle defining a channel connected to the pressurizing volume and directed to the arcing region, the nozzle configured to blow an arc extinguishing gas towards the arcing region during the breaking operation, the nozzle comprising a nozzle front face facing towards an interior of the pressurizing volume;
• and
• a shielding body arranged between the pressurizing volume and the nozzle, the shielding body being supported by the buffer housing, the shielding body having a shielding surface exposed to the interior of the pressurizing volume, the shielding body covering a major portion of the nozzle front face, the shielding surface of the shielding body is at least partly tilted in relation to the vertical axis of the switching axis, and the shielding body being supported by abutting against a stop of the buffer housing, and the stop the nozzle being sealed in axial direction.

A gas-insulated high or medium voltage circuit breaker comprising:

• a first arcing contact and a second arcing contact, wherein at least one of the two arcing contact is axially movable along a switching axis, an arc between the first arcing contact and the second arcing contact being formed in an arcing region during a breaking operation;
• a buffer housing defining a pressurizing volume;
• a nozzle arranged at a nozzle side of the pressurizing volume, the nozzle defining a channel connected to the pressurizing volume and directed to the arcing region, the nozzle configured to blow an arc extinguishing gas towards the arcing region during the breaking operation, the nozzle comprising a nozzle front face facing towards an interior of the pressurizing volume;
• and
• a shielding body arranged between the pressurizing volume and the nozzle, the shielding body being supported by the buffer housing, the shielding body having a shielding surface exposed to the interior of the pressurizing volume, the shielding body covering a major portion of the nozzle front face, the shielding body being supported by abutting against a stop of the buffer housing, and the stop the nozzle being sealed in axial direction, and the shielding body comprises an L-shaped cross-section comprising a long leg section perpendicular to the switching axis and a short leg section parallel to the switching axis, the shielding surface comprising:
• an upper shielding surface defined by the long leg section;
• a middle shielding surface defined by the short leg section, the middle shielding surface perpendicular to the upper shielding surface;
• and
• a lower shielding surface defined by the short leg section,
• the upper shielding surface, the middle shielding surface, and the lower shielding surface being exposed to the interior of the pressurizing volume.