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公开(公告)号：US20190115174A1
公开(公告)日：2019-04-18
申请号：US16207946
申请日：2018-12-03
Applicant: ABB Schweiz AG
Inventor： Bernardo Galletti , Elham Attar , Jan Carstensen , Magne Saxegaard , Martin Kristoffersen , Martin Seeger , Michael Schwinne , Nitesh Ranjan , Patrick Stoller
Abstract: A gas-insulated low- or medium-voltage load break switch includes: a housing defining a housing volume for holding an insulation gas at an ambient pressure; a first arcing contact and a second arcing contact arranged within the housing volume, the first and second arcing contacts being movable in relation to each other along an axis of the load break switch and defining a quenching region in which an arc is formed during a current breaking operation; a pressurizing system having a pressurizing chamber arranged within the housing volume for pressurizing a quenching gas from an ambient pressure p0 to a quenching pressure pquench during the current breaking operation; and a nozzle system arranged within the housing volume for blowing the pressurized quenching gas in a subsonic flow pattern from the pressurization chamber onto the arc formed in the quenching region during the current breaking operation. The nozzle system includes at least one nozzle arranged for blowing the quenching gas from an off-axis position predominantly radially inwardly onto the quenching region.
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2.发明授权公开(公告)号：US10991528B2
公开(公告)日：2021-04-27
申请号：US16626199
申请日：2018-06-12
Applicant: ABB Schweiz AG
Inventor： Nitesh Ranjan , Elham Attar , Jan Carstensen , Magne Saxegaard , Martin Kristoffersen , Ståle Talmo , Stanley Lohne , Michael Schwinne , Martin Seeger
Abstract: A load-break switch has a housing holding insulation gas at ambient pressure; a first main contact and a second main contact being movable relative to each other in an axial direction of the switch; a first arcing contact and a second arcing contact being movable relative to each other in the axial direction and defining an arcing region where an arc is formed during a current breaking operation, wherein the arcing region is located radially inward from the first main contact; a pressurizing system pressurizing a quenching gas during the current breaking operation; and a nozzle system arranged to blow the pressurized quenching gas onto the arc. The first main contact includes at least one pressure release opening to allow gas flow in a radial outward direction. A total area of the pressure release opening suppresses a reduction of gas flow out of the pressure release opening.
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公开(公告)号：US10964498B2
公开(公告)日：2021-03-30
申请号：US16207946
申请日：2018-12-03
Applicant: ABB Schweiz AG
Inventor： Bernardo Galletti , Elham Attar , Jan Carstensen , Magne Saxegaard , Martin Kristoffersen , Martin Seeger , Michael Schwinne , Nitesh Ranjan , Patrick Stoller
Abstract: A gas-insulated low- or medium-voltage load break switch includes: a housing defining a housing volume for holding an insulation gas at an ambient pressure; a first arcing contact and a second arcing contact arranged within the housing volume, the first and second arcing contacts being movable in relation to each other along an axis of the load break switch and defining a quenching region in which an arc is formed during a current breaking operation; a pressurizing system having a pressurizing chamber arranged within the housing volume for pressurizing a quenching gas from an ambient pressure p0 to a quenching pressure pquench during the current breaking operation; and a nozzle system arranged within the housing volume for blowing the pressurized quenching gas in a subsonic flow pattern from the pressurization chamber onto the arc formed in the quenching region during the current breaking operation. The nozzle system includes at least one nozzle arranged for blowing the quenching gas from an off-axis position predominantly radially inwardly onto the quenching region.
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