WO2018225256A1 - Disjoncteur à gaz - Google Patents

Disjoncteur à gaz Download PDF

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Publication number
WO2018225256A1
WO2018225256A1 PCT/JP2017/021506 JP2017021506W WO2018225256A1 WO 2018225256 A1 WO2018225256 A1 WO 2018225256A1 JP 2017021506 W JP2017021506 W JP 2017021506W WO 2018225256 A1 WO2018225256 A1 WO 2018225256A1
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WO
WIPO (PCT)
Prior art keywords
arc
gas
cylinder
contact
fixed
Prior art date
Application number
PCT/JP2017/021506
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English (en)
Japanese (ja)
Inventor
崇文 飯島
圭 川崎
嵩人 石井
吉野　智之
Original Assignee
株式会社 東芝
東芝エネルギーシステムズ株式会社
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.)
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Application filed by 株式会社 東芝, 東芝エネルギーシステムズ株式会社 filed Critical 株式会社 東芝
Priority to PCT/JP2017/021506 priority Critical patent/WO2018225256A1/fr
Publication of WO2018225256A1 publication Critical patent/WO2018225256A1/fr

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    • 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
    • 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
    • H01H33/904—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 characterised by the transmission between operating mechanism and piston or movable contact

Definitions

  • This embodiment relates to a gas circuit breaker that performs current interruption in an electric power system.
  • a gas circuit breaker is used to cut off the current flowing through the power supply line of the power system.
  • the gas circuit breaker is disposed on the power supply line in order to cut off the current flowing when the system in which the accident has occurred is disconnected in the event of a system failure.
  • a puffer type gas circuit breaker As a gas circuit breaker as described above, a puffer type gas circuit breaker is widely used.
  • the puffer-type gas circuit breaker has a pair of electrodes arranged opposite to each other in a sealed container filled with an arc extinguishing gas. These pair of electrodes are driven to open and close by a driving device arranged outside the gas circuit breaker.
  • the pair of electrodes are driven by a driving device disposed outside the gas circuit breaker and mechanically separated.
  • the arc current continues to flow until the current zero point of the next AC current.
  • the puffer type gas circuit breaker interrupts this arc current by circulating the arc extinguishing gas in the hermetic container and blowing the arc on the arc to extinguish the arc.
  • the gas circuit breaker as described above cuts off the arc current by blowing arc extinguishing gas on the arc to extinguish the arc. For this reason, the arc extinguishing gas sprayed on the arc becomes high temperature. This high-temperature arc extinguishing gas may cause the components of the gas circuit breaker to melt and cause functional deterioration. Deterioration of the components of the gas circuit breaker causes inconveniences such as the current not being interrupted quickly when a power system ground fault occurs. Therefore, it is necessary to quickly cool the arc extinguishing gas that has become hot.
  • SF6 gas excellent in arc extinguishing performance is used as one of arc extinguishing gas.
  • SF6 gas is a global warming gas, and its use amount is required to be reduced.
  • no arc extinguishing gas having arc extinguishing performance comparable to SF6 gas has been found. Therefore, it is necessary to reduce the volume of the gas circuit breaker and to reduce the capacity of the SF6 gas that is an arc extinguishing gas.
  • the contact that is an electrode arranged inside the gas circuit breaker and the gas container's sealed container are close to each other, so that insulation when blocking a large current is required. Performance may be reduced. In order not to deteriorate the insulation performance, it is necessary to quickly cool the arc extinguishing gas that has been blown to the arc and has reached a high temperature.
  • This embodiment is intended to provide a gas circuit breaker capable of quickly cooling an arc extinguishing gas that has been blown onto an arc and has reached a high temperature.
  • the gas circuit breaker of this embodiment has the following configuration.
  • (1) A sealed container filled with an arc extinguishing gas.
  • (2) A first fixed contact portion fixed to the sealed container.
  • (3) A second fixed contact portion fixed to the sealed container.
  • (4) By moving between the first fixed contact portion and the second fixed contact portion, the current of the first fixed contact portion and the second fixed contact portion is conducted and cut off. Movable contact part to do.
  • (5) The arc generated when the current is interrupted between the fixed arc contact provided in the first fixed contact portion and the movable arc contact provided in the movable contact portion is the arc extinguishing property. The arc is extinguished by blowing the gas.
  • the first fixed contact portion has the following configuration.
  • the through cylinder has an air chamber partitioned by a partition wall having a plurality of ejection holes.
  • (2-3) The arc-extinguishing gas in the air chamber is mixed with the gas flow of the arc-extinguishing gas that is ejected from the ejection hole and flows to the through-cylinder.
  • the mixed arc-extinguishing gas is agitated by an agitating portion provided on the downstream side of the gas flow of the arc-extinguishing gas in the through-cylinder.
  • FIG. 1 shows an internal structure when the gas circuit breaker 1 is in an open circuit state.
  • the gas circuit breaker 1 includes a first fixed contact portion 2 (hereinafter collectively referred to as “fixed contact portion 2”), a movable contact portion 3, and a second fixed contact portion 4 (hereinafter referred to as “fixed contact portion”). Part 4 ”), and has a sealed container 8.
  • the power supply line 7 a is connected to the fixed contact portion 2 and the power supply line 7 b is connected to the fixed contact portion 4 through the sealed container 8.
  • the power supply lines 7a and 7b are connected to the power system.
  • the gas circuit breaker 1 is installed in a power supply facility such as a substation.
  • the fixed contact portion 2 and the fixed contact portion 4 are cylindrical members made of conductive metal.
  • the movable contact portion 3 is a cylindrical member made of a conductive metal that is disposed in close contact with the inner diameters of the fixed contact portion 2 and the fixed contact portion 4 so as to be slidable.
  • the fixed contact portion 2 and the fixed contact portion 4 are disposed in the sealed container 8 so as to be separated from each other.
  • the movable contact portion 3 is driven by a driving device 9 disposed outside the gas circuit breaker 1 and moves between the fixed contact portion 2 and the fixed contact portion 4, thereby causing the fixed contact portion 2 and The stationary contact portion 4 is electrically cut off or conducted. As a result, the power supply lines 7a and 7b are electrically cut off or conducted.
  • An arc is generated between the stationary contact portion 2 and the movable contact portion 3 when the gas circuit breaker 1 is in an open circuit state.
  • the arc is extinguished by circulating the arc extinguishing gas filled in the sealed container 8.
  • the sealed container 8 is a cylindrical sealed container made of metal, insulator or the like, and is filled with an arc extinguishing gas.
  • an arc extinguishing gas sulfur hexafluoride gas (SF6 gas) excellent in arc extinguishing performance and insulation performance is used.
  • the sealed container 8 is connected to the ground potential.
  • the fixed contact portion 2 is a cylindrical member that draws a concentric circle with the sealed container 8.
  • the fixed contact portion 2 includes a fixed arc contact 21, a fixed energization contact 22, an exhaust pipe 25, and a partition wall 26. Further, the partition wall 26 partitions the interior of the fixed contact portion 2 and constitutes an air chamber 27. Details of these members will be described later.
  • the power supply line 7 a is connected to the fixed contact portion 2 through the sealed container 8.
  • the stationary contact portion 2 is fixed and arranged on the sealed container 8.
  • the stationary contact portion 2 is electrically connected to the stationary contact portion 4 via the movable contact portion 3 when the gas circuit breaker 1 is closed, and conducts current between the power supply lines 7a and 7b.
  • the stationary contact portion 2 is electrically disconnected from the movable contact portion 3 when the gas circuit breaker 1 is in the open state, and interrupts the current between the power supply lines 7a and 7b.
  • the fixed contact portion 4 is a cylindrical member that draws a concentric circle with the sealed container 8.
  • the fixed contact portion 4 includes an energizing contact 41 and a piston 42. Details of these members will be described later.
  • the power supply line 7 b is connected to the fixed contact portion 4 through the sealed container 8.
  • the stationary contact portion 4 is fixed and arranged on the sealed container 8.
  • the stationary contact portion 4 is electrically connected to the stationary contact portion 2 via the movable contact portion 3 when the gas circuit breaker 1 is closed, and conducts current between the power supply lines 7a and 7b.
  • the stationary contact portion 4 blocks the current between the power supply lines 7a and 7b because the stationary contact portion 2 and the movable contact portion 3 are electrically disconnected when the gas circuit breaker 1 is in the open state. To do.
  • the movable contact portion 3 is a cylindrical member that draws a concentric circle with the sealed container 8.
  • the movable contact portion 3 includes a movable arc contact 31, a movable energizing contact 32, an insulating nozzle 33, and a cylinder 34. Details of these members will be described later.
  • One end of the movable contact portion 3 has a cylindrical shape having an outer diameter in contact with the inner diameter of the fixed contact portion 2.
  • the other end of the movable contact portion 3 has a cylindrical shape having an outer diameter in contact with the inner diameter of the fixed contact portion 4.
  • the movable contact portion 3 is arranged so as to be able to reciprocate between the fixed contact portion 2 and the fixed contact portion 4.
  • the movable contact portion 3 is mechanically connected to a driving device 9 disposed outside the gas circuit breaker 1.
  • the driving device 9 When the gas circuit breaker 1 is opened and closed, the movable contact portion 3 is driven by the driving device 9, and the current flowing through the power supply lines 7a and 7b is cut off and conducted.
  • the movable contact portion 3 electrically connects the fixed contact portion 2 and the fixed contact portion 4 when the gas circuit breaker 1 is closed, and conducts current between the power supply lines 7a and 7b.
  • the movable contact portion 3 is electrically disconnected from the fixed contact portion 2 when the gas circuit breaker 1 is in the open state, and interrupts the current between the power supply lines 7a and 7b.
  • the movable contact portion 3 ejects the arc extinguishing gas accumulated in the cylinder 34 from the insulating nozzle 33 and extinguishes the arc generated between the fixed contact portion 2 and the movable contact portion 3. To cut off the arc current.
  • the fixed contact portion 2, the movable contact portion 3, the fixed contact portion 4, and the sealed container 8 are cylindrical members that draw concentric circles, have a common central axis, and are arranged on the same axis.
  • the direction on the stationary contact portion 2 side is referred to as an open end direction
  • the direction on the opposite stationary contact portion 4 side is referred to as a driving device direction.
  • the fixed contact portion 2 includes a fixed arc contact 21 and a fixed energization contact 22.
  • the fixed energizing contact 22 is a ring-shaped electrode disposed on the outer peripheral end surface of the fixed contact portion 2 in the driving device direction.
  • the fixed energizing contact 22 is constituted by a metal conductor formed in a ring shape that bulges toward the inner diameter side by cutting or the like.
  • the fixed energizing contact 22 has an inner diameter with a certain clearance that can slide with the outer diameter of the movable energizing contact 32 of the movable contact portion 3.
  • the fixed energizing contact 22 is arranged at the end of the through-cylinder 24 made of a cylindrical conductor metal in the driving device direction.
  • a power supply line 7 a is connected to the through cylinder 24 via the sealed container 8.
  • the through cylinder 24 is fixed to the sealed container 8 by an insulating member.
  • the movable energizing contact 32 of the movable contact 3 is inserted into the fixed energizing contact 22.
  • the fixed energizing contact 22 comes into contact with the movable energizing contact 32 and electrically connects the fixed contact 2 and the movable contact 3.
  • the fixed energizing contact 22 is separated from the movable energizing contact 32 of the movable contact portion 3 to electrically interrupt the fixed contact portion 2 and the movable contact portion 3. .
  • the fixed arc contact 21 is a rod-like electrode disposed at the end of the fixed contact 2 in the direction of the driving device along the central axis of the cylinder of the fixed contact 2.
  • the fixed arc contact 21 is constituted by a metal conductor formed in a solid cylindrical shape with one end rounded by cutting or the like.
  • the fixed arc contact 21 has an outer diameter with a certain clearance that can slide with the inner diameter of the movable arc contact 31 of the movable contact portion 3.
  • the fixed arc contact 21 is fixed to the through cylinder 24 by a fixed support provided on the inner wall surface of the through cylinder 24 constituting the outer periphery of the fixed contact portion 2.
  • the fixed arc contact 21 When the gas circuit breaker 1 is closed, the fixed arc contact 21 is inserted into the movable arc contact 31 of the movable contact portion 3. As a result, the fixed arc contact 21 comes into contact with the movable arc contact 31 of the movable contact 3 and electrically connects the fixed contact 2 and the movable contact 3.
  • the fixed arc contact 21 is separated from the movable arc contact 31 of the movable contact 3 and is generated between the fixed contact 2 and the movable contact 3. Bear the arc. An arc is not generated between the fixed energizing contact 22 and the movable energizing contact 32 of the movable contact portion 3.
  • the fixed arc contact 21 and the movable arc contact 31 avoid the generation of an arc between the fixed energizing contact 22 and the movable energizing contact 32, and concentrate the arc between the fixed arc contact 21 and the movable arc contact 31. It is provided to make it. Thereby, the deterioration by the arc of the fixed energizing contact 22 and the movable energizing contact 32 is reduced.
  • the arc between the fixed arc contact 21 and the movable arc contact 31 is extinguished when the arc extinguishing gas accumulated in the cylinder 34 of the movable contact 3 is ejected through the insulating nozzle 33. Is done.
  • the through-cylinder 24 is a cylindrical member made of a cut-out conductor metal.
  • the cylinder 24 is arranged at the end of the fixed energizing contact 22 in the open end direction with the axis of the cylinder aligned with the axis of the fixed energizing contact 22.
  • the through cylinder 24 may be formed integrally with the fixed energizing contact 22.
  • the power supply line 7 a is connected to the cylinder 24 via the sealed container 8. Further, the through cylinder 24 supports the fixed arc contact 21, the fixed energization contact 22, and the exhaust pipe 25.
  • the inside of the through-cylinder 24 is a flow path of arc extinguishing gas, and the arc extinguishing gas blown to the arc and heated to high temperature is supplied from the arc space between the fixed arc contact 21 and the movable arc contact 31. Guide to the exhaust pipe 25.
  • the outer diameter of the end of the through-cylinder 24 in the direction of the driving device is substantially the same as the outer diameter of the fixed energizing contact 22.
  • the outer diameter of the end portion in the open end direction of the through-cylinder 24 is smaller than the outer diameter of the end portion in the drive device direction.
  • the through-cylinder 24 has a slope portion 29 having an angle of 5 degrees to 10 degrees with respect to the central axis from the end portion in the open end direction to the end portion in the drive device direction.
  • the slope portion 29 on the outer periphery of the through-cylinder 24 has a straightening protrusion 29a.
  • the rectifying protrusions 29 a are protrusions formed in a teardrop type, and are arranged in the direction of the driving device on the slope surface of the slope portion 29 on the outer periphery of the through-cylinder 24.
  • the rectifying protrusion 29a may be formed by cutting out the material constituting the through cylinder 24, or may be formed by joining different parts.
  • the rectifying protrusion 29 a rectifies the gas flow of the arc extinguishing gas exhausted from the exhaust pipe 25 so as to flow along the outer periphery of the through-cylinder 24.
  • the through-cylinder 24 has a stirring unit 28 at the end in the open end direction.
  • the stirring unit 28 is configured by a wave-shaped fin 28 a having a plurality of irregularities.
  • the stirrer 28 is formed by cutting out or cutting off the material constituting the through-cylinder 24.
  • the agitator 28 agitates the gas flow of the arc extinguishing gas that flows from the drive device direction to the open end direction in the through cylinder 24.
  • the stirring unit 28 may be formed by joining another part to the through-cylinder 24.
  • the exhaust pipe 25 is a cylindrical member made of metal or the like and having a bottomed portion at one end and an opening at the other end.
  • the diameter of the opening of the exhaust pipe 25 is larger than the diameter of the end of the through-cylinder 24 in the open end direction.
  • the exhaust pipe 25 is fixed to the fixed contact portion 2 by a support (not shown) or the like so that the bottomed portion is in the open end direction and the opening portion is in the driving device direction.
  • the exhaust pipe 25 is disposed so that the opening of the exhaust pipe 25 covers the end of the through cylinder 24 in the open end direction.
  • a flow path for exhausting the arc extinguishing gas is formed.
  • the arc extinguishing gas to be exhausted is changed in the flow direction by the exhaust pipe 25 and is exhausted into the sealed container 8 along the through cylinder 24.
  • the partition wall 26 is a cylindrical member made of a machined metal.
  • the partition wall 26 is arranged at the end of the fixed energizing contact 22 in the open end direction with the axis of the cylinder aligned with the axis of the fixed energizing contact 22.
  • the partition wall 26 may be formed integrally with the fixed energizing contact 22.
  • the diameter of the partition wall 26 is substantially equal to the inner diameter of the fixed energizing contact 22.
  • the length in the height direction of the cylinder of the partition wall 26 is shorter than the length of the through cylinder 24.
  • the length in the height direction of the cylinder of the partition wall 26 is desirably 1 ⁇ 4 to 1 ⁇ 2 of the through-cylinder 24.
  • the partition wall 26 forms a donut-shaped air chamber 27 along the outer periphery of the partition wall 26 together with the inner wall of the through-cylinder 24 and the end face of the fixed energizing contact 22 in the open end direction.
  • the air chamber 27 stores arc-extinguishing gas at room temperature.
  • the partition wall 26 has a plurality of ejection holes 26 a that connect the outer periphery and the inner periphery of the partition wall 26.
  • the ejection holes 26 a are a plurality of circular holes provided in the partition wall 26. It is desirable that four to sixteen ejection holes 26a are provided evenly around the partition wall 26.
  • the ejection hole 26 a is a round hole that communicates the outside and the inside of the partition wall 26.
  • the ejection holes 26a are provided such that the outer side of the partition wall 26 is closer to the driving device direction, and the inner side of the partition wall 26 is closer to the open end direction.
  • the inside of the through cylinder 24 is a flow path for arc extinguishing gas
  • the inside of the partition wall 26 is also a flow path for arc extinguishing gas.
  • the arc-extinguishing gas blown to the arc and heated to high temperature flows from the driving device direction to the open end direction with the inside of the partition wall 26 as a flow path.
  • the ejection holes 26a are provided such that the outer side of the partition wall 26 is closer to the upstream direction of the arc-extinguishing gas flow and the inner side of the partition wall 26 is closer to the downstream direction of the arc-extinguishing gas flow.
  • the ejection holes 26a are arranged so as to form an acute angle with respect to the flow of the arc extinguishing gas.
  • the ejection hole 26a be provided closer to the downstream direction (open end direction) of the flow of the arc extinguishing gas than 1/2 of the height direction of the partition wall 26 forming a cylinder.
  • the opening area Sb of the n ejection holes 26 a provided in the partition wall 26 has a relation of the expression (1) with respect to the inner area Sm of the cross section of the partition wall 26. 0.2 ⁇ Sb ⁇ n ⁇ Sb (1) That is, it is desirable that the total opening area of the ejection holes 26a provided in the partition wall 26 is one fifth or more of the inner area of the cross section of the partition wall 26 that is the arc extinguishing gas channel.
  • the arc extinguishing gas in the pressure accumulating chamber 36 is pressurized and blown into the arc space between the fixed arc contact 21 and the movable arc contact 31.
  • the arc-extinguishing gas that has been blown to the arc and has reached a high temperature flows from the drive device direction to the open end direction with the inside of the partition wall 26 and the through-cylinder 24 as flow paths.
  • the flow of the arc extinguishing gas causes a pressure difference between the arc extinguishing gas in the air chamber 27 and the gas flow of the arc extinguishing gas flowing in the through-cylinder 24. That is, the inner side of the partition wall 26 has a negative pressure from the air chamber 27 formed on the outer periphery of the partition wall 26.
  • the arc-extinguishing gas stored in the air chamber 27 is ejected to the inside of the partition wall 26 through the ejection holes 26a, and is mixed with the gas flow of the arc-extinguishing gas that is blown to the arc and becomes high temperature. Since the arc-extinguishing gas stored in the air chamber 27 is at room temperature, the arc-extinguishing gas that has been sprayed onto the arc and has reached a high temperature is cooled.
  • the pressure of the arc extinguishing gas in the sealed container 8 is uniform. Accordingly, the pressures in the air chamber 27 formed on the outer periphery of the partition wall 26 and the inside of the partition wall 26 serving as the arc extinguishing gas flow path are equal. Accordingly, the arc extinguishing gas is not ejected from the air chamber 27 to the inside of the partition wall 26 through the ejection hole 26a.
  • the fixed contact portion 4 includes an energizing contact 41 and a piston 42.
  • the energizing contact 41 is a ring-shaped electrode disposed on the outer peripheral end surface of the fixed contact portion 4 in the open end direction.
  • the energizing contact 41 is configured by a metal conductor formed in a ring shape that bulges toward the inner diameter side by cutting or the like.
  • the energizing contact 41 has an inner diameter with a certain clearance that can slide with the outer diameter of the cylinder 34 of the movable contact portion 3.
  • the energizing contact 41 is disposed at the end of the support 43 made of a cylindrical conductor metal in the open end direction.
  • the power supply line 7 b is connected to the support 43 via the sealed container 8.
  • the support 43 is fixed to the sealed container 8 with an insulating member.
  • the cylinder 34 of the movable contact portion 3 is inserted into the energizing contact 41.
  • the energizing contact 41 comes into contact with the cylinder 34 and electrically connects the fixed contact 4 and the movable contact 3.
  • the cylinder 34 of the movable contact portion 3 slides in the energizing contact 41. Since the cylinder 34 of the movable contact portion 3 is made of a conductive metal, the electrical connection between the fixed contact portion 4 and the movable contact portion 3 is ensured regardless of whether the gas circuit breaker 1 is closed or open. Is done.
  • the piston 42 is a donut-shaped plate disposed on the end surface of the fixed contact portion 4 in the open end direction.
  • the piston 42 is constituted by a metal conductor formed into a donut shape by cutting or the like.
  • the piston 42 has an outer diameter that can slide with the outer diameter of the cylinder 34 of the movable contact portion 3.
  • the piston 42 has a donut-shaped hole diameter slidable with the outer diameter of the operation rod 35 constituting the inner wall of the cylinder 34 of the movable contact portion 3.
  • the piston 42 is fixed to the support 43 by a piston support 42 a provided on the inner wall surface of the support 43 that forms the outer periphery of the fixed contact portion 4.
  • the piston 42 forms a pressure accumulating chamber 36 for accumulating arc extinguishing gas together with the cylinder 34 of the movable contact portion 3.
  • the piston 42 compresses the arc extinguishing gas in the pressure accumulating chamber 36 together with the cylinder 34 of the movable contact portion 3 when the gas circuit breaker 1 is opened.
  • the piston 42 ensures the hermeticity of the pressure accumulating chamber 36. Thereby, the arc extinguishing gas in the pressure accumulating chamber 36 is pressurized.
  • the arc between the fixed energizing contact 22 and the movable energizing contact 32 is extinguished by the arc-extinguishing gas in the pressure accumulating chamber 36 being ejected through the insulating nozzle 33.
  • the support 43 is a cylindrical conductor having a bottom surface on one end, and the bottom end surface is disposed in the direction of the driving device.
  • the support 43 is inserted with the cylinder 34 of the movable contact portion 3 from the open end direction.
  • the piston support 42a is a member that extends linearly from the piston 42 toward the support 43 in the direction of the driving device.
  • the piston support 42 a fixes the piston 42 to the support 43.
  • the movable contact portion 3 includes a movable arc contact 31, a movable energizing contact 32, an insulating nozzle 33, and a cylinder 34.
  • the movable energizing contact 32 is a ring-shaped electrode disposed on the outer peripheral end surface of the movable contact portion 3 in the open end direction.
  • the movable energizing contact 32 is constituted by a metal conductor formed in a ring shape by cutting or the like.
  • the movable energizing contact 32 has an outer diameter that is slidable with the inner diameter of the fixed energizing contact 22 of the fixed contact portion 2 and has a certain clearance.
  • the movable energizing contact 32 is disposed at the end of the cylinder 34 made of a cylindrical conductor metal in the open end direction.
  • the movable energizing contact 32 When the gas circuit breaker 1 is closed, the movable energizing contact 32 is inserted into the fixed energizing contact 22 of the fixed contact 2. As a result, the movable energizing contact 32 comes into contact with the fixed energizing contact 22 and electrically connects the movable contact 3 and the fixed contact 2.
  • the movable energizing contact 32 is separated from the fixed energizing contact 22 of the fixed contact 2 and electrically interrupts the movable contact 3 and the fixed contact 2. .
  • the movable energizing contact 32 is formed integrally with a cylinder 34 made of a conductor.
  • the cylinder 34 is inserted and brought into contact with the energizing contact 41 of the fixed contact 4 to electrically connect the movable contact 3 and the fixed contact 4. . Since the cylinder 34 slides inside the energizing contact 41 of the fixed contact 4, the electric contact between the movable contact 3 and the fixed contact 4 regardless of whether the gas circuit breaker 1 is closed or open. Secure continuity.
  • the movable arc contact 31 is a cylindrical electrode disposed at the end of the movable contact 3 in the open end direction along the central axis of the cylinder of the movable contact 3.
  • the movable arc contact 31 is constituted by a metal conductor formed into a hollow cylindrical shape with one end rounded by cutting or the like.
  • the movable arc contact 31 has an inner diameter with a certain clearance that can slide with the outer diameter of the fixed arc contact 21 of the fixed contact portion 2.
  • the movable arc contact 31 is connected to the inner periphery of the cylinder 34 of the movable contact 3.
  • the cylinder 34 is connected to an insulating rod 37 and is disposed so as to be able to reciprocate between the fixed contact portion 2 and the fixed contact portion 4.
  • the fixed arc contact 21 of the fixed contact portion 2 is inserted into the movable arc contact 31.
  • the movable arc contact 31 comes into contact with the fixed arc contact 21 of the fixed contact 2 and electrically connects the movable contact 3 and the fixed contact 2.
  • the movable arc contact 31 is separated from the fixed arc contact 21 of the fixed contact 2. Thereby, the movable arc contact 31 bears an arc generated between the movable contact 3 and the fixed contact 2. An arc is not generated between the movable energizing contact 32 and the fixed energizing contact 22 of the fixed contact 2.
  • the arc generated when the gas circuit breaker 1 is open is concentrated between the movable arc contact 31 and the fixed arc contact 21. Generation of an arc between the movable energizing contact 32 and the fixed energizing contact 22 is avoided, and deterioration of the movable energizing contact 32 and the fixed energizing contact 22 is reduced.
  • the arc between the movable arc contact 31 and the fixed arc contact 21 is extinguished by the arc extinguishing gas accumulated in the cylinder 34 of the movable contact 3.
  • the internal space of the movable arc contact 31 communicates with a space between the movable arc contact 31 where the arc is generated and the fixed arc contact 21 (hereinafter collectively referred to as “arc space”). .
  • the internal space of the movable arc contact 31 serves as one of the arc-extinguishing gas exhaust passages during arc extinguishing.
  • the tip of the movable arc contact 31 may be divided in the circumferential direction to form a finger electrode.
  • the movable arc contact 31 has flexibility, and the inner diameter of the opening edge of the movable arc contact 31 is slightly smaller than the outer diameter of the fixed arc contact 21 and is narrowed.
  • the movement of the movable arc contact 31 with respect to the fixed arc contact 21 is caused by the operation rod 35 fixedly supported by the movable arc contact 31.
  • the operation rod 35 has an opening at one end in the open end direction, a cylindrical shape with a bottom at the other end in the driving device direction, and the inside is hollow.
  • the operation rod 35 is arranged coaxially with the movable arc contact 31 and the fixed arc contact 21.
  • the movable arc contact 31 and the operation rod 35 have the same diameter, and the movable arc contact 31 is erected on the opening edge of the operation rod 35 in the open end direction.
  • the cylinder 34 is a cylindrical member made of a metal conductor and having a bottomed portion at one end and an opening at the other end.
  • the cylinder 34 has an operation rod 35 that forms a cylindrical inner wall.
  • the operating rod 35 is a cylindrical member arranged so as to draw a concentric circle with the cylinder 34.
  • the cylinder 34 is connected to the operation rod 35 and moves together with the operation rod 35 so that the bottomed portion is flush with the end surface of the operation rod 35 in the open end direction.
  • the cylinder 34 has an inner diameter larger than the outer diameter of the operation rod 35 and has a common central axis with the operation rod 35.
  • the bottomed portion has a disk shape, extends from the outer peripheral edge of the tip of the operation rod 35 in a flange shape, and the side peripheral wall extends in the direction of the driving device. An end surface of the support 43 of the fixed contact portion 4 in the driving device direction is opened, and the operation rod 35 is inserted through the opening and penetrates the support 43.
  • the cylinder 34 has an outer diameter that is slidable with the inner diameter of the fixed energizing contact 41 and has a certain clearance.
  • the cylinder 34 has an inner diameter that can slide with the outer diameter of the piston 42 of the fixed contact portion 4. Further, the operating rod 35 constituting the inner wall of the cylinder 34 has an outer diameter that can slide with the donut-shaped hole diameter of the piston 42.
  • the cylinder 34 is disposed between the fixed contact portion 2 and the fixed contact portion 4 so that the bottomed portion is in the open end direction and the opening portion is in the driving device direction.
  • the cylinder 34 is disposed so as to be slidable with the energizing contact 41 of the fixed contact portion 4.
  • a piston 42 is inserted, and the cylinder 34 and the piston 42 form a pressure accumulating chamber 36 for accumulating arc-extinguishing gas.
  • the cylinder 34 and the piston 42 compress the arc extinguishing gas in the pressure accumulating chamber 36 when the gas circuit breaker 1 is opened.
  • the cylinder 34 and the piston 42 ensure airtightness of the pressure accumulating chamber 36. Thereby, the arc extinguishing gas in the pressure accumulating chamber 36 is pressurized.
  • a through hole 34 a is provided on the surface of the cylinder 34 in the open end direction.
  • the arc extinguishing gas boosted in the pressure accumulating chamber 36 is guided to the arc space through the insulating nozzle 33.
  • the cylinder 34 is reciprocated by the drive device 9 via an insulating rod 37 connected to the operation rod 35 of the cylinder 34.
  • the reciprocating movement by the driving device 9 is performed when the gas circuit breaker 1 is closed and when it is opened.
  • the cylinder 34 When the gas circuit breaker 1 is closed or open, the cylinder 34 is inserted into the energizing contact 41 of the fixed contact 4. As a result, the cylinder 34 comes into contact with the energizing contact 41 and electrically connects the movable contact portion 3 and the fixed contact portion 4. The cylinder 34 slides inside the energizing contact 41. Since the cylinder 34 is made of a conductive metal, electrical conduction between the movable contact portion 3 and the fixed contact portion 4 is ensured regardless of whether the gas circuit breaker 1 is closed or open.
  • the cylinder 34 When the gas circuit breaker 1 is in the open state, the cylinder 34 is moved in the direction of the driving device 9 via the operation rod 35 and the insulating rod 37. Thereby, the cylinder 34 compresses the arc extinguishing gas in the pressure accumulating chamber 36 in cooperation with the piston 42. As a result, the arc extinguishing gas in the pressure accumulating chamber 36 is pressurized.
  • the peripheral wall of the operation rod 35 is provided with a communication hole that communicates the hollow portion of the operation rod 35 and the internal space of the support 43, and the side wall of the support 43 includes a space inside the support 43 and an external space. Exhaust holes are provided to communicate with each other. For this reason, the hollow portion of the operating rod 35 communicates with the inside of the sealed container through the inner space of the support 43 around a part thereof, and becomes one of the exhaust passages for the gas from the arc space.
  • the insulating nozzle 33 is a cylindrical rectifying member having a throat portion that guides the discharge direction of the arc extinguishing gas that has been pressurized in the pressure accumulating chamber 36.
  • the insulating nozzle 33 is made of a heat resistant insulator such as polytetrafluoroethylene.
  • the insulating nozzle 33 is arranged at the end of the cylinder 34 in the open end direction so that the shaft constituting the cylinder of the insulating nozzle 33 is on the extension of the cylinder shaft of the cylinder 34.
  • the insulating nozzle 33 extends toward the fixed arc contact 21 along the axis so as to surround the movable arc contact 31, and after passing through the tip of the movable arc contact 31, the inner diameter is larger than the outer diameter of the fixed arc contact 21. Is narrowed to a slightly larger extent, and has a shape that linearly expands toward the open end when it reaches the throat portion that is the minimum inner diameter portion.
  • the arc-extinguishing gas is guided to the arc space by the insulating nozzle 33. Further, the arc extinguishing gas is concentrated in the arc space by the throat portion of the insulating nozzle 33, and the flow rate of the arc extinguishing gas is increased.
  • the arc extinguishing gas is compressed and pressurized in the pressure accumulating chamber 36 formed by the cylinder 34 and the piston 42.
  • the arc extinguishing gas boosted in the pressure accumulating chamber 36 is guided to the arc space through the inside of the insulating nozzle 33 through the through hole 34a of the cylinder 34.
  • the arc extinguishing gas is blown to the arc generated between the movable arc contact 31 and the fixed arc contact 21, and the arc is extinguished.
  • the arc extinguishing gas boosted in the pressure accumulating chamber 36 sequentially passes through the through-hole 34a provided on the end face in the open end direction of the cylinder 34, the inside of the insulating nozzle 33, and the movable arc.
  • the air is exhausted into the sealed container 8 through the space between the contact 31, the arc space, the internal space of the insulating nozzle 33 in the open end direction from the throat portion, and the cylinder 24.
  • This communicating space becomes one of the arc-extinguishing gas exhaust passages.
  • the insulator such as polytetrafluoroethylene, which is a constituent material of the insulating nozzle 33, is melted and gasified.
  • the gas in which the insulator is melted enters the pressure accumulating chamber 36 from the inner wall of the insulating nozzle 33 and acts on the pressure increase in the pressure accumulating chamber 36.
  • the operating rod 35 is a hollow cylinder with an open end in the open end direction to which the movable arc contact 31 is fixed.
  • the end in the direction of the driving device is connected to the driving device 9 via a solid insulating rod 37 and is pushed out or pulled in in the axial direction.
  • the movable arc contact 31 and the operating rod 35 have the same diameter, and the movable arc contact 31 is erected with its peripheral edge aligned with the opening edge of the end of the operating rod 35 in the open end direction.
  • the hollow portion of the operating rod 35 communicates with the arc space and serves as an exhaust passage for the gas after the arc extinguishing gas is blown onto the arc.
  • a current-carrying support 44 On the rear end surface of the support 43, a current-carrying support 44 having a cylindrical shape with the same diameter is arranged coaxially so that the cylindrical shape continues from the support 43.
  • the energization support 44 supports a member that becomes a part of the electric path in an energized state.
  • the energizing support 44 is an insulating member having a cylindrical shape, and one end is connected to the support 43 and the other end is fixed to the hermetic container to fix and support the support 43 and to insulate the support 43 from the hermetic container. .
  • the insulating rod 37 is surrounded by the support 43 and the energization support 44.
  • an energizing contact 41 that is a substantially cylindrical conductor is erected.
  • the front opening end of the energizing contact 41 bulges inward, and the inner diameter matches and contacts the outer diameter of the cylinder 34 so that the cylinder 34 can slide.
  • the fixed contact portion 2 and the fixed contact portion 4 are electrically connected via the movable contact portion 3 and conduct current between the power supply lines 7a and 7b.
  • the movable energizing contact 32 of the movable contact 3 is inserted into the fixed energizing contact 22 of the fixed contact 2.
  • the fixed energizing contact 22 comes into contact with the movable energizing contact 32, and the fixed contact 2 and the movable contact 3 are electrically connected.
  • the fixed arc contact 21 of the fixed contact portion 2 is inserted into the movable arc contact 31 of the movable contact portion 3.
  • the fixed arc contact 21 comes into contact with the movable arc contact 31, and the fixed contact 2 and the movable contact 3 are electrically connected.
  • the cylinder 34 of the movable contact portion 3 is inserted into the energizing contact 41 of the fixed contact portion 4.
  • the energizing contact 41 comes into contact with the cylinder 34, and the fixed contact 4 and the movable contact 3 are electrically connected.
  • the cylinder 34 of the movable contact portion 3, the movable energizing contact 32, and the movable arc contact 31 are electrically connected.
  • the stationary contact portion 2 and the stationary contact portion 4 are electrically connected via the movable contact portion 3, and the power supply lines 7a and 7b are electrically connected.
  • the pressure of the arc extinguishing gas in the sealed container 8 is uniform.
  • the gas flow of the arc extinguishing gas which is blown to the arc and becomes high temperature is not generated. Accordingly, the pressures in the air chamber 27 formed on the outer periphery of the partition wall 26 and the inside of the partition wall 26 serving as the arc extinguishing gas flow path are equal.
  • the arc extinguishing gas is not ejected from the air chamber 27 to the inside of the partition wall 26 through the ejection hole 26a. Further, the arc extinguishing gas is not exhausted from the end portion of the through-cylinder 24 in the open end direction and the exhaust pipe 25.
  • the circuit breaker that opens the gas circuit breaker 1 is in a state where the gas circuit breaker 1 is disconnected from the conductive state, such as when an accident current, a small advance current, a delayed load current such as a reactor circuit break, or a very small accident current needs to be interrupted. This is done when switching to.
  • the driving device 9 When driving the gas circuit breaker 1 from the closed state to the open state, the driving device 9 is driven. By the drive device 9, the movable contact portion 3 is moved in the fixed contact portion 4 along the axis in the direction of the drive device. As a result, the movable energizing contact 32 is separated from the fixed energizing contact 22 and the movable arc contact 31 is separated from the fixed arc contact 21.
  • the movable contact portion 3 moves, the cylinder 34 moves in the direction of the driving device so as to approach the piston 42, the pressure accumulating chamber 36 is compressed, and the arc extinguishing gas in the pressure accumulating chamber 36 is increased. .
  • the movable contact portion 3 is pulled by the drive device 9, the distance between the fixed arc contact 21 and the movable arc contact 31 is increased, and the arc extinguishing gas in the pressure accumulating chamber 36 is increased to a preset pressure. And arc-extinguishing gas is ejected from the through-hole 34a of the pressure accumulation chamber 36.
  • the arc extinguishing gas ejected from the through hole 34 a of the pressure accumulating chamber 36 is strongly blown against a very high temperature arc through a gas flow path formed between the insulating nozzle 33 and the movable arc contact 31. It is done. Thereafter, the blown-off arc extinguishing gas is heated in the arc space to a high temperature, and is discharged to the movable contact portion 3 side in the driving device direction and the fixed contact portion 2 side in the open end direction.
  • the arc extinguishing gas discharged to the movable contact portion 3 side flows from the arc space into the hollow portion of the operation rod 35 through the movable arc contact 31.
  • the arc space, the space inside the movable arc contact 31, and the hollow portion of the operating rod 35 are connected in series.
  • the hollow portion of the operation rod 35 communicates with a part of the internal space of the support 43 through the communication hole.
  • a part of the internal space of the support 43 communicates with the sealed container 8 through the exhaust hole.
  • a part of the arc extinguishing gas that has reached a high temperature is exhausted into the sealed container 8 through the hollow portion of the operation rod 35 and the support 43.
  • the arc extinguishing gas discharged to the fixed contact portion 2 side is discharged into the sealed container 8 through the inside of the insulating nozzle 33 and the through cylinder 24.
  • the arc extinguishing gas blown to the arc reaches a high temperature of several thousand degrees, and flows into the fixed contact portion 2 from the arc space between the fixed arc contact 21 and the movable arc contact 31 at a high speed.
  • the arc-extinguishing gas having a high temperature of several thousand degrees is in a dissociated state, and further ionized into a plasma state.
  • the arc extinguishing gas that has been in a dissociated state or a plasma state flows from the drive device direction to the open end direction with the inside of the partition wall 26 and the through cylinder 24 as a flow path.
  • the flowing arc-extinguishing gas convects while expanding and accelerating in the flow path according to the pressure ratio and flow path cross-sectional area ratio. At this time, a pressure drop and a temperature drop occur in the flow path.
  • the inner diameter of the partition wall 26 is substantially the same as the inner diameter of the fixed energizing contact 22, and the partition wall 26 does not decrease the flow rate of the arc extinguishing gas that has flowed into the partition wall 26. Due to the gas flow of the arc extinguishing gas that is blown to the arc and becomes a high temperature, the inner side of the partition wall 26 has a lower pressure than the air chamber 27 formed on the outer periphery of the partition wall 26. As a result, the arc extinguishing gas stored in the air chamber 27 is ejected to the inside of the partition wall 26 through the ejection hole 26a. Since the arc-extinguishing gas stored in the air chamber 27 is at room temperature, the arc-extinguishing gas that has been sprayed onto the arc and has reached a high temperature is cooled.
  • the gas flow of the arc extinguishing gas that has been blown to the arc and has reached a high temperature is blown with the arc extinguishing gas stored in the air chamber 27 to form a new gas flow.
  • this new gas stream is not well agitated at this stage and is therefore not sufficiently cooled.
  • the gas flow of the arc extinguishing gas blown to the arc and the high temperature is not sufficiently mixed with the arc extinguishing gas blown from the air chamber 27, and the outside of the new gas flow is at a low temperature. The inside is still not cold.
  • the new gas flow of the arc extinguishing gas flows from the driving device direction to the open end direction with the inside of the through-cylinder 24 as a flow path.
  • the through-cylinder 24 has an agitating portion 28 constituted by wave-shaped fins 28a having a plurality of irregularities at the end in the open end direction.
  • a new gas flow of the arc extinguishing gas is swirled by the wave-shaped fins 28 a having a plurality of irregularities when passing through the stirring unit 28.
  • the gas flow of the arc extinguishing gas blown to the arc and the arc extinguishing gas blown from the air chamber 27 is agitated, and the temperature of the new gas flow becomes uniform both outside and inside. .
  • the arc extinguishing gas blown to the arc and heated to a high temperature is sufficiently cooled.
  • the flow of the cooled arc extinguishing gas can be changed by the exhaust pipe 25.
  • the cooled arc extinguishing gas is exhausted along the slope portion 29 provided on the outer periphery of the through-cylinder 24 from the open end direction toward the drive device.
  • a slope portion 29 having an angle of 5 degrees to 10 degrees with respect to the central axis is provided on the outer periphery of the through-cylinder 24 from the end portion in the open end direction to the end portion in the drive device direction.
  • the arc extinguishing gas exhausted from the exhaust pipe 25 is exhausted along the slope portion 29. As a result, the amount of arc extinguishing gas exhausted in the direction of the sealed container 8 is suppressed.
  • the cooled arc extinguishing gas is cooled, but at a higher temperature than normal temperature. Exhaust of the arc-extinguishing gas having a temperature higher than normal temperature in the direction of the sealed container 8 is undesirable because it may cause insulation deterioration between the fixed contact portion 2 and the sealed container 8.
  • the slope portion 29 on the outer periphery of the through-cylinder 24 is provided with a rectifying protrusion 29a.
  • the arc extinguishing gas exhausted along the slope portion 29 from the exhaust pipe 25 is rectified so as to flow in the outer peripheral direction of the through-cylinder 24 by the rectifying protrusion 29a. Thereby, the quantity of the arc extinguishing gas further exhausted in the direction of the sealed container 8 is suppressed.
  • the first fixed contact portion 2 has the through-cylinder 24 that exhausts the arc extinguishing gas blown to the arc, and the through-cylinder 24 has a plurality of ejection holes 26a.
  • An arc chamber 27 partitioned by a partition wall 26 having an arc extinguishing gas in the air chamber 27 is mixed with and mixed with a gas flow of the arc extinguishing gas that is ejected from the ejection hole 26 a and flows to the through cylinder 24.
  • the arc extinguishing gas is agitated by the agitating portion 28 provided on the downstream side of the gas flow of the arc extinguishing gas in the through-cylinder 24, the arc extinguishing gas blown to the arc and quickly becomes high temperature. Can be cooled.
  • the through cylinder 24 can be reduced in size, and as a result, the entire gas circuit breaker 1 can be reduced in size and cost. be able to.
  • the stirring portion 28 has the open end of the through-cylinder 24 formed in a corrugated shape. It is possible to provide a gas circuit breaker that can rapidly cool the arc-extinguishing gas that has become hot and is stirred with the arc-extinguishing gas at room temperature in the air chamber 27.
  • the stirring unit 28 is a pyramid-shaped or fin-shaped projection provided on the downstream side of the gas flow of the arc-extinguishing gas in the through-cylinder 24.
  • a gas circuit breaker capable of quickly cooling a high temperature arc extinguishing gas by stirring the high temperature arc extinguishing gas blown to the arc and the room temperature arc extinguishing gas in the air chamber 27 can do.
  • the arc-extinguishing gas flows along the outer periphery of the cylinder 24 at the downstream end of the gas-cylinder 24 downstream of the arc-extinguishing gas flow.
  • An exhaust pipe 25 for flowing a gas flow of gas is disposed, and the outer periphery of the through-cylinder 24 has a slope portion 29 that swells at an angle of 5 to 10 degrees from the exhaust pipe 25 toward the movable contact portion 3. Since the gas flow of the arc-extinguishing gas discharged from the exhaust pipe 25 is exhausted along the portion 29, the gas flow of the arc-extinguishing gas that has been blown to the arc and has reached a high temperature is spread from the through-cylinder 24 and exhausted. And the insulation performance of the gas circuit breaker can be improved. In addition, this allows the through cylinder 24 to be made more compact.
  • the rectifying protrusion that rectifies the gas flow of the arc-extinguishing gas so as to flow along the outer periphery of the through-cylinder 24. Since 29a is arranged, it is possible to further reduce that the gas flow of the arc extinguishing gas that has been blown to the arc and becomes high temperature is exhausted from the through-cylinder 24, and the insulation performance of the gas circuit breaker can be improved. . In addition, this allows the through cylinder 24 to be made more compact.
  • the air chamber 27 is discharged from the ejection hole 26 a. Since the arc-extinguishing gas is ejected, it is possible to cool the arc-extinguishing gas that has been blown to the arc and has reached a high temperature without using a cooling mechanism by power. As a result, the entire gas circuit breaker 1 can be reduced in size and cost.
  • the stirring unit 28 provided on the downstream side of the gas flow of the arc extinguishing gas in the through-cylinder 24 is the fin 28a in which the open end of the through-cylinder 24 is formed in a wave shape.
  • the stirring unit 28 is a pyramidal or fin-like protrusion provided on the downstream side of the gas flow of the arc extinguishing gas in the through-cylinder 24. 28b may be used.
  • the stirrer 28 provided on the downstream side of the gas flow of the arc-extinguishing gas in the through-cylinder 24 is formed as a pyramid-like or fin-like projection 28b, so that the arc-extinguishing property in the air chamber 27 can be obtained by small components. Agitation of the gas and the gas flow of the arc-extinguishing gas flowing in the through cylinder 24 can be performed. Thereby, the arc-extinguishing gas sprayed on the arc and having a high temperature can be quickly cooled.
  • the through cylinder 24 can be reduced in size, and as a result, the entire gas circuit breaker 1 can be reduced in size and cost. be able to.
  • the commutator 25a may be provided in the exhaust portion of the exhaust pipe 25.
  • the commutator 25 a is a plurality of protrusions provided on the exhaust portion of the exhaust pipe 25.
  • the commutator 25a may be formed by cutting out the material constituting the exhaust pipe 25, or may be formed by joining other parts.
  • the commutator 25 a rectifies so that the gas flow of the arc extinguishing gas exhausted from the exhaust pipe 25 flows along the outer periphery of the through-cylinder 24. By providing the commutator 25a, the amount of arc-extinguishing gas exhausted in the direction of the sealed container 8 is further suppressed.

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  • Circuit Breakers (AREA)

Abstract

L'invention concerne un disjoncteur à gaz qui peut refroidir rapidement un gaz d'extinction d'arc qui a été soufflé à un arc et qui atteint une température élevée. Ce disjoncteur à gaz comprend un récipient étanche 8 dans lequel un gaz d'extinction d'arc est scellé, une première partie de contact fixe 2 fixée au récipient étanche 8, une seconde partie de contact fixe 4 fixée au récipient étanche 8, et une partie de contact mobile 3 pour faire passer ou bloquer un courant électrique entre la première partie de contact fixe 2 et la seconde partie de contact fixe 4 en se déplaçant entre la première partie de contact fixe 2 et la seconde partie de contact fixe 4, et dans le disjoncteur à gaz, le gaz d'extinction d'arc est soufflé pour éteindre l'arc généré lors du blocage du courant entre un contact d'arc fixe 21 prévu dans la première partie de contact 2 et un contact d'arc mobile 31 prévu dans la partie de contact mobile 3, la première partie de contact 2 ayant un cylindre à air 24 qui évacue un gaz d'extinction d'arc qui a été soufflé au niveau de l'arc, le cylindre à air 24 a une chambre d'air 27 divisée par une paroi de partition 26 ayant de multiples trous d'éjection 26a, et le gaz d'extinction d'arc à l'intérieur de la chambre d'air 27 est éjecté à partir des trous d'éjection 26a, mélangé dans l'écoulement du gaz d'extinction d'arc dans le cylindre à air 24, et le gaz d'extinction d'arc mélangé est agité par un agitateur 28 disposé dans le cylindre à air 24 en aval dans l'écoulement du gaz d'extinction d'arc.
PCT/JP2017/021506 2017-06-09 2017-06-09 Disjoncteur à gaz WO2018225256A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2017/021506 WO2018225256A1 (fr) 2017-06-09 2017-06-09 Disjoncteur à gaz

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2017/021506 WO2018225256A1 (fr) 2017-06-09 2017-06-09 Disjoncteur à gaz

Publications (1)

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WO2018225256A1 true WO2018225256A1 (fr) 2018-12-13

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PCT/JP2017/021506 WO2018225256A1 (fr) 2017-06-09 2017-06-09 Disjoncteur à gaz

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000222987A (ja) * 1999-01-28 2000-08-11 Mitsubishi Electric Corp パッファ形ガス遮断器
JP2017016797A (ja) * 2015-06-29 2017-01-19 株式会社東芝 ガス遮断器

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000222987A (ja) * 1999-01-28 2000-08-11 Mitsubishi Electric Corp パッファ形ガス遮断器
JP2017016797A (ja) * 2015-06-29 2017-01-19 株式会社東芝 ガス遮断器

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