Gas-insulated low- or medium-voltage switch with swirling device
First Claim
1. A gas-insulated low- or medium-voltage switch for system voltages within 1 to 52 kV and for up to 2000 A rated current, the switch comprising:
- first and second contacts being movable in relation to each other along an axis of the switch and defining a quenching region in which an arc is formed during a current breaking operation; and
an arc-extinguishing system for extinguishing the arc during the current breaking operation, including;
a pressurization system having a pressurizing chamber for pressurizing a quenching gas during the current breaking operation, wherein the pressurizing chamber is a puffer chamber with a piston arranged for compressing the quenching gas within the puffer chamber during the current breaking operation, and one of the piston and a remaining portion of the puffer chamber is movable together with the first or second contact;
a nozzle system connecting the pressurization system with the quenching region, the nozzle system having a nozzle at an outlet of the nozzle system for blowing the pressurized quenching gas onto the arc formed in the quenching region during the current breaking operation; and
a swirling device configured for generating a subsonic swirl flow of the quenching gas onto the quenching region during the current breaking operation, wherein the swirling device is arranged at an entrance of the nozzle system.
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Accused Products
Abstract
A gas-insulated low- or medium-voltage switch for system voltages within 1 to 52 kV and for up to 2000 A rated current includes first and second contacts being movable in relation to each other along an axis of the switch and defining a quenching region in which an arc is formed during a current breaking operation; and an arc-extinguishing system for extinguishing the arc during the current breaking operation. The arc-extinguishing system may include a pressurization system with a puffer chamber, and a nozzle system connecting the pressurization system with the quenching region, the nozzle system having a nozzle at its outlet for blowing the pressurized quenching gas onto the arc formed in the quenching region during the current breaking operation; and a swirling device configured for generating a subsonic swirl flow of a quenching gas onto the quenching region during the current breaking operation, wherein the swirling device is arranged at an entrance of the nozzle system. The arc-extinguishing system further includes a swirling device configured for generating a subsonic swirl flow of a quenching gas onto the quenching region during the current breaking operation, wherein the swirling device is arranged at an entrance of the nozzle system.
8 Citations
19 Claims
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1. A gas-insulated low- or medium-voltage switch for system voltages within 1 to 52 kV and for up to 2000 A rated current, the switch comprising:
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first and second contacts being movable in relation to each other along an axis of the switch and defining a quenching region in which an arc is formed during a current breaking operation; and an arc-extinguishing system for extinguishing the arc during the current breaking operation, including; a pressurization system having a pressurizing chamber for pressurizing a quenching gas during the current breaking operation, wherein the pressurizing chamber is a puffer chamber with a piston arranged for compressing the quenching gas within the puffer chamber during the current breaking operation, and one of the piston and a remaining portion of the puffer chamber is movable together with the first or second contact; a nozzle system connecting the pressurization system with the quenching region, the nozzle system having a nozzle at an outlet of the nozzle system for blowing the pressurized quenching gas onto the arc formed in the quenching region during the current breaking operation; and a swirling device configured for generating a subsonic swirl flow of the quenching gas onto the quenching region during the current breaking operation, wherein the swirling device is arranged at an entrance of the nozzle system. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A distribution network, Ring Main Unit, or secondary distribution gas-insulated switchgear having a load break switch comprising:
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first and second contacts being movable in relation to each other along an axis of the switch and defining a quenching region in which an arc is formed during a current breaking operation; and an arc-extinguishing system for extinguishing the arc during the current breaking operation, including; a pressurization system having a pressurizing chamber for pressurizing a quenching gas during the current breaking operation, wherein the pressurizing chamber is a puffer chamber with a piston arranged for compressing the quenching gas within the puffer chamber during the current breaking operation, and one of the piston and a remaining portion of the puffer chamber is movable together with the first or second contact; a nozzle system connecting the pressurization system with the quenching region, the nozzle system having a nozzle at an outlet of the nozzle system for blowing the pressurized quenching gas onto the arc formed in the quenching region during the current breaking operation; and a swirling device configured for generating a subsonic swirl flow of the quenching gas onto the quenching region during the current breaking operation, wherein the swirling device is arranged at an entrance of the nozzle system.
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Specification