EP3767659A1 - Disjoncteur avec amélioration du refroidissement d'échappement - Google Patents

Disjoncteur avec amélioration du refroidissement d'échappement Download PDF

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Publication number
EP3767659A1
EP3767659A1 EP19186329.9A EP19186329A EP3767659A1 EP 3767659 A1 EP3767659 A1 EP 3767659A1 EP 19186329 A EP19186329 A EP 19186329A EP 3767659 A1 EP3767659 A1 EP 3767659A1
Authority
EP
European Patent Office
Prior art keywords
deflection
typically
circuit breaker
openings
volume
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP19186329.9A
Other languages
German (de)
English (en)
Inventor
Michael Schwinne
Patrick Stoller
Bernardo Galletti
Martin Seeger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Energy Ltd
Original Assignee
ABB Power Grids Switzerland AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ABB Power Grids Switzerland AG filed Critical ABB Power Grids Switzerland AG
Priority to EP19186329.9A priority Critical patent/EP3767659A1/fr
Priority to JP2022600005U priority patent/JP3239773U/ja
Priority to PCT/EP2020/069820 priority patent/WO2021009148A1/fr
Publication of EP3767659A1 publication Critical patent/EP3767659A1/fr
Pending legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
    • H01H33/88—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts
    • H01H33/90—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism
    • H01H33/91—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism the arc-extinguishing fluid being air or gas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
    • H01H33/7015—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid characterised by flow directing elements associated with contacts
    • H01H33/7038—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid characterised by flow directing elements associated with contacts characterised by a conducting tubular gas flow enhancing nozzle
    • H01H33/7046—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid characterised by flow directing elements associated with contacts characterised by a conducting tubular gas flow enhancing nozzle having special gas flow directing elements, e.g. grooves, extensions
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
    • H01H33/88—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts
    • H01H2033/888—Deflection of hot gasses and arcing products

Definitions

  • Embodiments of the present disclosure relate to a circuit breaker, a method of operating a circuit breaker, and a method for cooling an exhaust fluid in a circuit breaker.
  • a high voltage circuit breaker is an automatically or manually operated electrical switch designed to protect an electrical circuit from damage caused by excess current from a short circuit and to switch load currents.
  • the basic function of a high voltage circuit breaker is to interrupt current flow, for instance, after a fault is detected. Unlike a fuse, which operates once and then must be replaced, a high voltage circuit breaker can be reset (either manually or automatically) to resume normal operation.
  • a current interruption process involves a mechanical separation of an electrical contact between terminals of an electric circuit carrying current inside the circuit breaker and, more specifically, in an arcing zone of the high voltage circuit breaker.
  • a fluid i.e. a gaseous medium
  • gaseous media commonly used in circuit breakers are air, sulphur hexafluoride (SF 6 ) and, more recently, carbon dioxide (CO 2 ).
  • the arc in the arcing zone of the circuit breaker has to be extinguished as quickly as possible before voltage builds up sufficiently to re-strike the arc.
  • One option of extinguishing the arc is by quickly removing heat from the arc and arcing zone developed by ohmic heating of current passing through an arc resistance.
  • the heat capacity of the gaseous medium in the arcing zone, and more particularly around the arc mostly determines the time required to remove heat from the arc and arcing zone.
  • a gaseous medium is injected in the arcing zone of the high voltage circuit breaker.
  • the gaseous medium can be cold (for example, in the case when low currents are interrupted), but can reach high temperatures in the range 1000 K to 2000 K.
  • the gaseous medium used for current interruption is compressed mechanically in a so-called puffer volume.
  • the puffer volume is connected directly to the arc zone, so that hot gas from the arc zone also enters the puffer volume and mixes with the cold gas.
  • the resulting "warm” gas is still much colder than the hot gas and plasma / "ionized gas" present in the arcing zone and can be used to effectively cool the arc.
  • the mechanically compressed cold gas in the "puffer volume” is separated from the hot gas injected from the arc zone into the "heating volume” via an intermediate valve.
  • the intermediate valve closes above a certain threshold arc energy / pressure build-up in the heating volume.
  • the key aspect of the design of the exhaust and the tank is to avoid dielectric breakdown between the exhaust (which is at high voltage) to the surrounding tank (which is grounded).
  • the hot gaseous medium is dissipated (e.g. moves) axially with respect to an axis extending along the high voltage circuit breaker.
  • a circuit breaker, a method of operating a circuit breaker, and a method for cooling an exhaust fluid in a circuit breaker according to the independent claims are provided.
  • the present disclosure aims to improve cooling the gas that leaves the arcing zone of a circuit breaker.
  • the present disclosure aims to increase the heat transfer from an exhaust fluid to a deflection housing in a circuit breaker while the exhaust fluid is flowing from the arcing zone via an exhaust zone into an exhaust tank.
  • the present disclosure aims to decrease a temperature of the exhaust fluid in an exhaust tank.
  • the present disclosure aims to extinguish an arc in a high voltage circuit breaker without the need of additional equipment.
  • a circuit breaker which includes at least one quenching chamber.
  • the quenching chamber is configured to be filled with insulating gas, extends along a longitudinal axis and includes an arcing zone and an exhaust zone.
  • the exhaust zone is configured to dissipate (e.g. remove) hot insulating gas from the arcing zone into a tank.
  • At least one deflection volume is enclosed by a deflection housing and is arranged within an inner volume of the exhaust zone.
  • the at least one deflection volume is configured to fluidly connect the arcing zone with the exhaust tank through a plurality of openings within the deflection housing.
  • a method of operating a circuit breaker according to the present disclosure includes breaking an electric current by the circuit breaker.
  • a method for cooling insulating gas in a circuit breaker includes at least one quenching chamber filled with insulating gas.
  • the method includes conducting the insulating gas through at least one deflection volume.
  • the at least one deflection volume is enclosed by a deflection housing which is arranged within an exhaust zone.
  • the exhaust zone is configured to fluidly connect an arcing zone with an exhaust tank.
  • a circuit breaker having at least one quenching chamber.
  • the circuit breaker may be rotationally symmetrical.
  • a circuit breaker is typically a high voltage circuit breaker.
  • the term high voltage relates to voltages that exceed 1 kV, and typically relates to nominal voltages in the range from 72 kV to 550 kV, for example about 145 kV, about 245 kV or about 420 kV.
  • Nominal current ratings of a high voltage circuit breaker are typically in the range from 3 kA to 5 kA, for example about 3.15 kA or about 4 kA.
  • the current which flows during the abnormal conditions in which the high voltage circuit breaker performs its duty, may be interchangeably referred to as the switching current, the breaking current or the short circuit current.
  • the switching current may be in the range from 31.5 kA to 80 kA, which is termed high short-circuit current duty. In low short-circuit current duties, the switching current is typically larger than the nominal current and smaller than 0.3 times the rated short-circuit current, e.g. is at most 24 kA.
  • switching/breaking voltages may be very high, e.g. in the range from 110 kV to 1200 kV.
  • the circuit breaker is typically a high voltage generator circuit breaker.
  • the term high voltage when used in relation to a high voltage generator circuit breaker typically relates to nominal voltages in the range from 10 kV to 32 kV, for example about 15 kV, about 25 kV or about 31.5 kV.
  • Nominal currents of a high voltage generator circuit breaker are typically in the range from 4 kA to 35 kA, for example about 4 kA or about 25 kA.
  • the current, which flows during the abnormal conditions in which the high voltage generator circuit breaker performs its duty may be interchangeably referred to as the switching current, the breaking current or the short circuit current.
  • the switching current may be in the range from 50 kA to 300 kA.
  • a high voltage circuit breaker can be a self-blast circuit breaker, a generator circuit breaker, a puffer circuit breaker, or a gas-insulated circuit breaker, such as a gas insulated medium voltage circuit breakers and a gas insulated high voltage circuit breakers.
  • the circuit breaker of the present disclosure is a gas-insulated high voltage circuit breaker using SF 6 alternative gases, such as e.g., CO 2 as insulating gases in the quenching chamber.
  • the quenching chamber may contain at least two power contact pieces.
  • the power contact pieces may be part of a head to head contact system.
  • at least one of the power contact pieces may be in the form of a movable or stationary tubular hollow contact.
  • the tubular hollow contact may further be provided as tulip contact on a side of the arcing zone.
  • the quenching chamber of the circuit breaker extends along a longitudinal axis and contains at least one arcing zone and at least one exhaust zone.
  • the arcing zone is typically a zone or volume of the quenching chamber where an arc discharge occurs upon separation of the two or more power contact pieces that are movable relative to one another along an axis.
  • the axis may be a symmetry axis of the quenching chamber, in particular an axis of n-fold or continuous rotational symmetry.
  • the short term "rotational symmetry" shall mean a continuous rotational symmetry.
  • An n-fold rotational symmetry means a discrete symmetry regarding rotations by angles which are multiples of 360°/n, where n is an integer number larger than one.
  • the term “axial” designates an extension, distance etc. in the direction of the axis.
  • An axial separation between parts means that these parts are separated from each other when seen or measured in the direction of the axis.
  • the term “sideways” is to be understood with respect to the axial direction.
  • the term “radial” designates an extension, distance etc. in a direction perpendicular to the axis.
  • cross-section means a plane perpendicular to the axis, and the term “cross-sectional area” means an area in such a plane.
  • the exhaust zone is typically a zone or volume of the quenching chamber through which the hot insulating gases from the arcing zone are conducted into an exhaust tank.
  • the exhaust zone is configured for dissipating hot insulating gases from the arcing zone into an exhaust tank.
  • the exhaust zone may have an inner volume and may be configured to fluidly connect the arcing zone with the exhaust tank via specific means which contribute in cooling the hot insulating gases on their way from the arcing zone to the exhaust tank.
  • the exhaust zone may have the same radial extension as the quenching chamber.
  • the exhaust zone may have a radial extension that is smaller than the radial extension of the quenching chamber.
  • the exhaust zone may share a wall with the quenching chamber.
  • the exhaust zone may have an outer wall that has a smaller radial distance to the longitudinal axis than a wall of the quenching chamber.
  • the outer walls of the quenching zone may be the outer walls of the exhaust zone, i.e. the inner surface of the outer wall of the quenching chamber may be equivalent to the outer surface of the exhaust zone.
  • the exhaust zone may contain at least one deflection volume.
  • a deflection volume as described herein may refer to a volume that deflects the flow direction of the hot insulating gases on their way from the arcing zone to the exhaust tank.
  • deflection occurs when the hot gas flow contacts at least one wall of a deflection housing enclosing the deflection volume.
  • Contacting a housing wall by a gas stream is also known as "impinging event".
  • Such an "impinging event” leads to a heat transfer from the hot gases to the walls which finally results in cooling the hot gases to a certain degree. Cooling the gas flow is necessary since too high gas temperatures in the exhaust tank lead to dielectric failure.
  • the deflection volume may be enclosed by a deflection housing having housing walls. Since the gas flow of the hot insulating gases from the arcing zone to the exhaust tank gas should not be interrupted, it is required that the deflection housing comprises at least two (a plurality of) openings through which the gas can pass the deflection chamber.
  • a “deflection volume” as described herein may further refer to a volume that has an inner surface and an outer surface (in a radial direction).
  • the term “deflection volume” as described herein may refer to a volume that has a surface that is closer to an arcing zone and a surface that is - in a longitudinal direction - further away from the arcing zone.
  • the deflection volume may be arranged within an inner volume of the exhaust zone. This means that the surface of the deflection volume has a radial distance from the longitudinal axis of the quenching chamber substantially equal to or smaller than a radial extension of the exhaust zone.
  • Arranging the deflection volume within an inner volume of the exhaust zone provides the advantage that the deflection of the gas flow and as a result thereof, the cooling of the gas on its way to the exhaust tank can occur without the necessity of increasing the size of the quenching chamber in a radial direction. In addition, the necessity of using bigger exhaust tanks for decreasing the electric field in the exhaust can be avoided.
  • the present inventors found out that by arranging one or more deflection volumes in series within the inner volume of an exhaust zone leads to an efficient cooling of hot insulating gases and provides a feasible, space saving, and therefore cost effective solution for significantly transferring energy from the hot gases to surface walls, thereby leading to lower gas temperatures in the exhaust tank.
  • the proposed flow arrangement allows to put several of these deflection volumes in series along a longitudinal axis of the quenching chamber which can strongly enhance the aforementioned beneficial effects that already occur by using one deflection volume.
  • the present inventors particularly focused on removing heat from the hot gas exhausted from the arcing zone in order to avoid dielectric breakdown from the exhaust (at high voltage) to the tank walls (grounded). Such dielectric breakdown may occur after the arc is extinguished and voltage rises across the circuit breaker.
  • the deflection volume may be enclosed by a deflection housing having a plurality of openings.
  • the deflection housing may have one opening. These openings allow the hot insulating gases to pass through the deflection volume.
  • the deflection housing may further have at least two housing walls.
  • the deflection housing may include at least two substantially radial walls.
  • the deflection housing may further have at least one substantially axial wall. Some of these housing walls may have openings while others do not have openings.
  • “Substantially radial(ly)" as described herein may refer to a direction extending in a direction that is perpendicular (e.g.
  • substantially axial(ly) as described herein may refer to a direction that is parallel to a longitudinal axis or that has a deviation of less than 45°, additionally or alternatively less than 15°, additionally or alternatively more than 0.01° to a direction that is parallel to a longitudinal axis.
  • the deflection housing may include at least two substantially radial walls having no openings.
  • the deflection housing may additionally include at least one substantially axial wall having at least two openings.
  • the deflection housing may include at least two substantially radial walls wherein at least one of the substantially radial walls has at least one opening.
  • the deflection housing may include two substantially radial walls, each having at least one opening and may further have no additional substantially axial wall.
  • the deflection housing may include two substantially radial walls, wherein only one of the substantially radial walls has at least one opening while the other substantially radial wall has no openings.
  • the deflection housing may additionally include one substantially axial wall having at least one opening, or may include two substantially axial walls, each having at least one opening.
  • the deflection volume may be configured to both axially and radially deflect the insulating gas before entering the exhaust tank.
  • some walls of the deflection housing may interact with the plurality of openings thereof such that the insulating gas is both axially and radially deflected before entering the exhaust tank.
  • a first substantially radial wall and a second substantially radial wall of the deflection housing may be positioned opposite to each other at a minimal distance in a range of 15 mm to 60 mm, typically 20 mm to 45 mm, and more typically 25 mm to 35 mm.
  • a first substantially radial wall and a second substantially radial wall of the deflection housing may be positioned opposite to each other at a maximum distance in a range of 200 mm to 300 mm, typically 220 mm to 280 mm, and more typically 240 mm to 260 mm.
  • the deflection housing may have a plurality of openings.
  • a shape of each of the plurality of openings within the deflection housing may be circular, polygonal, or irregular.
  • a maximum width of the plurality of openings may be in a range of 1 mm and 100 mm, typically 3 mm to 80 mm, and more typically 5 mm to 60 mm.
  • a minimum width of the plurality of openings may be in a range of 1 mm and 10 mm, typically 2 mm to 8 mm, and more typically 3 mm to 5 mm.
  • a combined area of first openings may be 1850 mm 2
  • a combined area of second opening may be 3800 mm 2
  • a combined area of third openings may be more than 4000 mm 2 .
  • First opening as referred to herein may be openings that fluidly connect an exhaust zone with a first deflection volume.
  • Second openings as referred to herein may be openings that fluidly connect a first deflection volume with a second deflection volume or with an exhaust tank.
  • Third openings as referred to herein may be openings that fluidly connect a second deflection volume with a third deflection volume or with an exhaust tank.
  • the plurality of openings may be positioned in the deflection housing, typically in a wall of the deflection housing, following a random pattern or a regular pattern.
  • a regular pattern may for example be a pattern that is regular in one direction, such as for example a circumferential direction or a longitudinal direction.
  • a regular pattern may for example be a pattern that is regular in two directions, such as e.g. a circumferential and a longitudinal direction.
  • the plurality of openings in the deflection housing may comprise a total number of more than 2, more than 4, more than 8, additionally or alternatively, less than 100, less than 50, or less than 20 openings.
  • the plurality of openings may comprise a total number of 2 to 100 openings, typically 4 to 60 openings, more typically 6 to 20 openings.
  • the plurality of openings may be spaced apart by a distance in a range of 1 mm to 200 mm, typically 5 mm to 150 mm, and more typically 10 mm to 100 mm.
  • the plurality of openings may be arranged offset with respect to one another.
  • arranging the plurality of openings with an offset may refer to first openings that fluidly connect an exhaust zone with the deflection volume via a first deflection housing wall, said first openings being offset from second openings that fluidly connect the deflection volume with the exhaust zone via a second deflection housing wall.
  • offsetting first and the second openings to one another may beneficially increase the number of impinging events occurring when gas flow on housing walls of the deflection volume. Accordingly, offsetting the first and the second openings to one another may improve the cooling effect for cooling hot insulating gases.
  • the at least one deflection volume may be configured to deflect the hot insulating gases to be dissipated along at least one axially extending volume with a smaller radial extension than the exhaust zone.
  • a deflection volume may have a distance between an inner surface and an outer surface of the deflection volume that is smaller than a distance between a surface of the deflection volume that is closer to an arcing zone and a surface of the deflection volume that is further away from the arcing zone in a longitudinal direction. The relation between the aforementioned distances may be vice versa.
  • a deflection volume may have a distance between an inner surface and an outer surface of the deflection volume that is greater than a distance between a surface of the deflection volume that is closer to an arcing zone and a surface of the deflection volume that is further away from the arcing zone in a longitudinal direction.
  • two or more deflection volumes may be arranged in series within the exhaust zone along the longitudinal axis of the quenching chamber.
  • two to ten, more typically two to five deflection volumes may be arranged in series within the exhaust zone along the longitudinal axis of the quenching chamber.
  • Arranging two or more deflection volumes in series along the longitudinal axis of the quenching chamber can significantly enhance the energy absorbed by wall surfaces, resulting in lower gas temperatures in the exhaust.
  • gas mixing is not sufficient to cool the hot plasma from the arc.
  • the two or more deflection volumes arranged in series within the exhaust zone along the longitudinal axis of the quenching chamber are spaced from each other by a distance in a range of 10 mm to 500 mm, typically 20 mm to 350 mm, and more typically 50 mm to 250 mm.
  • a distance between two deflection volumes is defined as the distance between a first radial housing wall of a first deflection volume and a second radial wall of a second deflection volume, whereby the first and second radial walls are arranged along an outer wall of exhaust zone or along a longitudinal axis of the exhaust zone without any deflection volume there between.
  • the two or more deflection volumes have the shape of a cylinder with a base area A1 and a height HI, wherein A1 is in a range of 300 mm 2 and 100000 mm 2 , typically 400 mm 2 to 70000 mm 2 , and more typically 500 mm 2 to 30000 mm 2 , and wherein HI is in a range of 30 mm to 250 mm, typically 40 mm to 200 mm, and more typically 50 mm to 150 mm.
  • the two or more deflection volumes have the shape of a hollow cylinder with a base area A2 of the circular ring and a height H2, wherein A2 is in a range of 300 mm 2 and 100000 mm 2 , typically 400 mm 2 to 70000 mm 2 , and more typically 500 mm 2 to 30000 mm 2 , and wherein H2 is in a range of 30 mm to 250 mm, typically 40 mm to 200 mm, and more typically 50 mm to 150 mm.
  • the two or more deflection volumes are arranged such that a first deflection volume has the shape of a cylinder and a second deflection volume has the shape of a hollow cylinder, wherein the outer diameter of the first deflection volume substantially corresponds to the inner diameter of the second deflection volume.
  • a difference between a diameter of the first deflection volume in the shape of a cylinder and a diameter of the second deflection volume in the shape of a hollow cylinder corresponding to the second deflection volume is in a range of 5 mm to 60 mm, typically 8 mm to 30 mm, and more typically 10 mm to 20 mm.
  • a first deflection volume and a second deflection volume may overlap at least partially.
  • the overlap may comprise openings for fluid communication (fluidly connecting) between the first and second deflection volume.
  • the two or more deflection volumes may be configured to direct hot insulating gases to be dissipated with a combination of axial and radial deflections.
  • the axial and radial deflections may substantially be along the longitudinal axis of the circuit breaker within the radial extension of the exhaust zone.
  • hot insulating gas may enter a first deflecting volume in a radial direction; the hot insulating gas may then impinge on an outer wall of the deflecting volume to be deflected in an axial direction away from the arcing zone along a longitudinal extension of the deflecting volume; the hot insulating gas may then be deflected in a radial direction pointing towards the longitudinal axis through openings; the hot insulating gas may then be deflected in an axial direction pointing away from the arcing zone by impinging on a wall of either a second deflecting volume or an exhaust tank.
  • a sequence of deflection volumes may be provided within the radial extension of the exhaust zone of the quenching chamber.
  • the deflection volumes may be provided within the radial extension of the quenching chamber.
  • the sequence of deflection volumes may be provided along an outer wall of the exhaust zone which may also be the outer wall of the quenching chamber.
  • the deflection volumes may share an outer wall with the exhaust zone or may have an outer wall adjacent to the outer wall of the exhaust zone.
  • the sequence of deflection volumes may be provided such that a first deflection volume is adjacent to a second deflection volume or that a first deflection volume and a second deflection volume are spaced apart along an outer wall of the exhaust zone or along the longitudinal axis of the exhaust zone.
  • a sequence of deflection volumes may be provided in an alternating pattern, where a first deflection volume is provided on an outer wall of the exhaust zone and a second deflection volume is provided along a longitudinal axis of the exhaust zone.
  • the deflection volumes may partially overlap and the partial overlap may comprise openings for directing a gas flow from a first deflection volume into a second deflection volume. The openings may direct a gas flow in such a manner that it impinges on a wall of the deflection volume' housing.
  • a method of operating a circuit breaker which may comprise breaking an electric current by the circuit breaker of embodiments described herein.
  • a method for cooling an insulating gas in a circuit breaker having at least one quenching chamber filled with the insulating gas.
  • the method may comprise conducting the insulating gas through at least one deflection volume enclosed by a deflection housing.
  • the deflection housing may be arranged within an exhaust zone of the quenching chamber.
  • the exhaust zone may be configured to fluidly connect an arcing zone of the quenching chamber with an exhaust tank. Accordingly, the fluid connection between an arcing zone with an exhaust tank may comprise deflecting the insulating gas through at least one deflection volume arranged in an exhaust zone of the quenching chamber.
  • FIG. 1 shows a cross-section of a circuit breaker 100 according to embodiments described herein.
  • the circuit breaker may have at least one quenching chamber 102 that extends along a longitudinal axis A.
  • the quenching chamber 102 may contain an arcing zone. While not necessary, the quenching chamber 102 may additionally contain at least two power contact pieces (not shown). At least one of the power contact pieces may be movable. One of the power contact pieces may be provided as a tubular hollow contact.
  • the exhaust zone 120 has a radial extension r1. Arrows indicate an exemplary flow direction of hot insulating gas from the arcing zone to the exhaust tank 190.
  • a deflection volume 130 is exemplarily depicted that comprises an outer wall 132, an inner wall 138 and a radial wall 134 on a side of the deflection volume 130 that is closer to the arcing zone and a radial wall 136 on a side of the deflection volume that is further away from the arcing zone than radial wall 136.
  • FIG. 2 exemplarily shows a cross-section of a circuit breaker 200 according to embodiments described herein.
  • the exemplary circuit breaker 200 has a radial extension r2 of an exhaust zone 220 comprising a male contact at a side of an arcing zone.
  • Arrows indicate an exemplary flow of hot insulating gases.
  • the gases flow through openings that connect the exhaust zone 220 with an exhaust tank 290.
  • the gases are directed from a volume of the exhaust zone 220 through openings 242, 244, 246, 248 into a deflection volume 230.
  • the deflection volume 230 has an inner wall 238, an outer wall 232 and side walls 234 and 236, one of the side walls being arranged closer to the arcing zone.
  • FIG. 3 exemplarily shows a cross-section of a circuit breaker 300 according to embodiments described herein.
  • the circuit breaker 300 may be rotationally symmetric along an axis A or an axis A* or an axis A** (A* out of axis).
  • the exhaust zone 320 may be rotationally symmetric along an axis A or an axis A*.
  • the arrows indicate an exemplary flow of gas from an arcing zone to an exhaust tank 390.
  • the openings 342, 344 connect a volume of the exhaust zone on a side of the arcing zone to a first deflection volume 330.
  • the openings 346, 348 connect the first deflection volume 330 with a second deflection volume 340.
  • the openings 343 connect the second deflection volume 340 with an exhaust tank 390.
  • the openings 342 and 344 are offset from the openings 346 and 348.
  • the openings 346 and 348 are offset from openings 343.
  • the offset of openings may beneficially improve a cooling of gas, as the gas impinges on a wall of a deflection volume.
  • FIG. 4 exemplarily shows a cross-section of a circuit breaker 400 according to embodiments described herein.
  • the circuit breaker 400 may be rotationally symmetric along an axis A or an axis A* or an axis A** (A* out of axis).
  • the exhaust zone 420 may be rotationally symmetric along an axis A or an axis A*.
  • the arrows indicate an exemplary flow of gas from an arcing zone to an exhaust tank 490 (through a deflection volume).
  • the openings 442, 444 in a radial wall of a deflection volume 430 lead a gas flow to impinge on a second radial wall of the deflection volume 430.
  • the deflection volume has openings 446, 448 in an axial wall of the deflection volume. The openings 446, 448 lead the gas to impinge on a wall of the exhaust zone 420.
  • FIG. 5 exemplarily shows a cross-section of a circuit breaker 100, 200 according to embodiments described herein. Openings 552, 556 are depicted that connect a deflection volume 530 to an exhaust tank 590. The arrows indicate a flow of hot insulating gases from the deflection volume 530 to the exhaust tank 590. A previous deflection in deflection volume 530 (the gas entering the deflection volume 530) is indicated with dashed arrows. According to some embodiments, which can be combined with other embodiments described herein, openings 552, 556 may be located on opposite sides, rotationally symmetric or randomly with respect to a longitudinal axis.
  • FIG. 6 shows a cross-section of a circuit breaker 600 according to embodiments described herein.
  • the circuit breaker 600 may have at least one quenching chamber 602 that extends along a longitudinal axis A.
  • the quenching chamber 602 may contain an arcing zone. While not necessary, the quenching chamber 602 may additionally contain at least two power contact pieces (not shown). At least one of the power contact pieces may be movable. One of the power contact pieces may be provided as a tubular hollow contact.
  • the circuit breaker 600 may have an exhaust zone 620. As shown in FIG. 6 , arrows indicate an exemplary flow direction of hot insulating gas from the arcing zone to an exhaust tank 690.
  • the gas flow passes through first openings 632 and 634, second openings 642 and 644, third openings 652 and 654, and fourth openings 662 and 664.
  • the first openings 632, 634 connect a volume of the exhaust zone on a side of the arcing zone to a first deflection volume 670.
  • the second openings 642, 644 connect the first deflection volume 670 with a second deflection volume 680.
  • the third openings 652, 654 connect the second deflection volume 680 with a third deflection volume 690.
  • the fourth openings 662, 664 connect the third deflection volume 690 with the exhaust tank 690.
  • the first openings 632, 634 are offset from the second openings 642 and 644. The offset of openings may beneficially improve a cooling of gas, as the gas impinges on a wall of a deflection volume.

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EP19186329.9A 2019-07-15 2019-07-15 Disjoncteur avec amélioration du refroidissement d'échappement Pending EP3767659A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP19186329.9A EP3767659A1 (fr) 2019-07-15 2019-07-15 Disjoncteur avec amélioration du refroidissement d'échappement
JP2022600005U JP3239773U (ja) 2019-07-15 2020-07-14 排気冷却が改善された回路遮断器
PCT/EP2020/069820 WO2021009148A1 (fr) 2019-07-15 2020-07-14 Disjoncteur à refroidissement de gaz d'évacuation amélioré

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19186329.9A EP3767659A1 (fr) 2019-07-15 2019-07-15 Disjoncteur avec amélioration du refroidissement d'échappement

Publications (1)

Publication Number Publication Date
EP3767659A1 true EP3767659A1 (fr) 2021-01-20

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP19186329.9A Pending EP3767659A1 (fr) 2019-07-15 2019-07-15 Disjoncteur avec amélioration du refroidissement d'échappement

Country Status (3)

Country Link
EP (1) EP3767659A1 (fr)
JP (1) JP3239773U (fr)
WO (1) WO2021009148A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003096365A1 (fr) * 2002-05-08 2003-11-20 Siemens Aktiengesellschaft Ensemble interrupteur pour disjoncteur haute tension
EP1403891A1 (fr) * 2002-09-24 2004-03-31 ABB Schweiz AG Disjoncteur
EP2120244A1 (fr) * 2008-05-15 2009-11-18 ABB Technology AG Disjoncteur haute pression

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003096365A1 (fr) * 2002-05-08 2003-11-20 Siemens Aktiengesellschaft Ensemble interrupteur pour disjoncteur haute tension
EP1403891A1 (fr) * 2002-09-24 2004-03-31 ABB Schweiz AG Disjoncteur
EP2120244A1 (fr) * 2008-05-15 2009-11-18 ABB Technology AG Disjoncteur haute pression

Also Published As

Publication number Publication date
JP3239773U (ja) 2022-11-10
WO2021009148A1 (fr) 2021-01-21

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