WO2014174917A1 - 開閉装置 - Google Patents

開閉装置 Download PDF

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Publication number
WO2014174917A1
WO2014174917A1 PCT/JP2014/055904 JP2014055904W WO2014174917A1 WO 2014174917 A1 WO2014174917 A1 WO 2014174917A1 JP 2014055904 W JP2014055904 W JP 2014055904W WO 2014174917 A1 WO2014174917 A1 WO 2014174917A1
Authority
WO
WIPO (PCT)
Prior art keywords
permanent magnet
fixed
arc
switchgear
contact
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.)
Ceased
Application number
PCT/JP2014/055904
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
六戸　敏昭
加藤　達朗
淳 額賀
森山　智広
土屋　賢治
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 Ltd
Original Assignee
Hitachi Ltd
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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to US14/783,000 priority Critical patent/US20160049268A1/en
Priority to CN201480022143.0A priority patent/CN105122411A/zh
Publication of WO2014174917A1 publication Critical patent/WO2014174917A1/ja
Anticipated expiration legal-status Critical
Ceased 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
    • H01H33/02—Details
    • H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
    • H01H33/18—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet
    • H01H33/182—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet using permanent magnets
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/36—Contacts characterised by the manner in which co-operating contacts engage by sliding
    • H01H1/38—Plug-and-socket contacts
    • H01H1/385—Contact arrangements for high voltage gas blast circuit breakers
    • 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
    • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/64—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid wherein the break is in gas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/44—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet
    • H01H9/443—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet using permanent magnets

Definitions

  • the present invention relates to a switchgear, for example, a disconnect switch, a ground switch or a switch using a dry gas, N 2 , CO 2 , SF 6, and a mixed gas such as CO 2 / N 2 or SF 6 / N 2 as an insulating medium.
  • the present invention relates to a switchgear suitable for a composite switch or the like that combines a switch and a ground switch.
  • GIS gas-insulated switchgear
  • SF 6 gas or the like gas-insulated gas or the like as an insulating medium
  • Patent Document 1 As an example of the disconnector for this GIS.
  • a ring-shaped permanent magnet is arranged on the outer periphery of a fixed contact, and an electromagnetic force is applied to an arc generated between the fixed contact and the tip of the mover, thereby improving current interruption performance.
  • the permanent magnets are placed in a metal shield to prevent the increase in size in consideration of insulation.
  • Patent Document 2 regarding miniaturization.
  • each of the tips of the metal electric field relaxation shields and the surface of the high electric field portion in the vicinity thereof has an electric insulating property containing zinc oxide sintered powder.
  • Patent Document 3 there is Patent Document 3 as a structure in which the magnetic field strength can be easily adjusted.
  • an annular fixed-side arc shield having an opening hole having a diameter larger than the outer diameter of the mover is provided at the tip of the fixed-side shield, and a groove is provided inside the fixed-side arc shield to make it permanent. The placement of magnets is described.
  • Patent Document 4 a cylindrical fixed arc contact is disposed inside the fixed main contact, and a permanent magnet is provided inside the fixed arc contact so that the polarities of the magnetic poles are arranged along the driving direction.
  • the current interruption performance is improved by strengthening the magnetic field acting on the arc as compared with the case where the magnetic field is arranged outside the fixed main contact.
  • Patent Document 5 is an example of a ground switch.
  • Patent Document 5 by disposing a permanent magnet on the mover side, magnetic deterioration (magnetic force is weakened) of the permanent magnet due to arc heat is suppressed, and high shutoff performance is stably maintained over a long period of time. It is stated that it can be done.
  • JP 2010-251056 A JP 2009-124848 A JP 2007-323992 A JP 2002-334636 A JP 2009-54364 A
  • the ideal arrangement of the permanent magnets is to place the permanent magnets slightly between the fixed contacts.
  • the permanent magnet fixing method or disconnector There is a problem that the insulation performance at the time of opening must be ensured without increasing the size of the magnet, and the permanent magnet must be protected from arc heat.
  • the present invention has been made in view of the above-mentioned points.
  • the object of the present invention is to efficiently convert the magnetic force of the permanent magnet into an arc driving force, and to insulate the permanent magnet from the arc heat to reduce the magnetic deterioration.
  • An object of the present invention is to provide a switchgear that can be suppressed and that can ensure a blocking performance over a long period of time.
  • the switchgear according to the present invention can be driven back and forth with respect to the stationary contact provided on the stationary conductor and the movable contact on the movable conductor. Opening and closing are performed by contacting and separating the movable element supported via the movable element, and the movable element and the fixed-side contact, and at the time of the opening,
  • a switchgear provided with a permanent magnet that extinguishes by applying a magnetic field to an arc generated between the movable element and the permanent magnet
  • the permanent magnet is at the tip of the fixed-side conductor and from the fixed-side contactor Is also located on the inter-electrode side, and its periphery is covered with an insulating member.
  • the magnetic force of the permanent magnet can be efficiently converted into the arc driving force, and the permanent magnet can be insulated from the arc heat to suppress the magnetic deterioration, and the interruption performance can be secured over a long period of time. it can.
  • BRIEF DESCRIPTION OF THE DRAWINGS It is Example 1 of the switchgear of this invention, and is sectional drawing of the periphery of the poles which shows a closing state.
  • BRIEF DESCRIPTION OF THE DRAWINGS It is Example 1 of the switchgear of this invention, and is sectional drawing of the periphery of a gap
  • BRIEF DESCRIPTION OF THE DRAWINGS It is Example 1 of the switchgear of this invention, and is sectional drawing of the periphery between poles which shows an open state.
  • Example 2 of the switchgear of this invention is sectional drawing of the periphery of a pole which shows a closing state. It is Example 2 of the switchgear of this invention, and is sectional drawing of the periphery of the space
  • a disconnect switch, a ground switch or a disconnect switch using a dry gas, N 2 , CO 2 , SF 6 and a mixed gas such as CO 2 / N 2 or SF 6 / N 2 as an insulating medium and a ground switch
  • a switchgear such as a compound switch combined with a contactor
  • opening and closing are performed by contacting and separating the movable element and the stationary contact, and during the opening, the stationary contact and the
  • a permanent magnet that extinguishes by applying a magnetic field to an arc generated between the mover and the stationary magnet is installed at the tip of the fixed-side conductor and positioned between the fixed-side contacts, The periphery is covered with an insulating member.
  • the tip of the fixed-side conductor is provided with an insulating member that achieves an electric field relaxation effect and field emission electron suppression, and has a permanent magnet inside the insulating member, so that both current interruption performance and miniaturization can be achieved. Can be achieved at a higher level, and its performance can be maintained over a long period of time.
  • switchgear of the present invention will be described based on the illustrated embodiment.
  • tanks, operating devices, drive system links, and the like are omitted because they are within the scope of the prior art.
  • FIG. 1 to 3 show a gas-insulated disconnector that is Embodiment 1 of the switchgear of the present invention.
  • 1 shows a state at the time of closing
  • FIG. 2 shows a state at the time of opening (when the arc point is isolated)
  • FIG. 3 shows a state at the time of opening.
  • the gas-insulated disconnector of the present embodiment includes a fixed-side conductor 1a formed in a hollow cylindrical shape, a fixed-side contact 2a provided inside the fixed-side conductor 1a, and a fixed side
  • the reciprocating drive is possible with respect to the contact 2a, the mover 3 supported by the movable conductor 1b via the movable contact 2b, and the outer peripheral side of the tip of the fixed conductor 1a and the fixed contact
  • a ring-shaped permanent magnet 10a installed on the side closer to the pole than the child 2a (a groove may be provided in the center of the tip of the fixed-side conductor 1a, and the permanent magnet 10a may be disposed in the groove);
  • the fixed-side insulating member 5a such as an epoxy resin that covers the periphery of the permanent magnet 10a is formed in a tank (not shown) in a dry air, N 2 , CO 2 , SF 6 and CO 2 / N 2. It is housed together with the insulating medium of the mixed gas, such as and
  • the permanent magnet 10a may be fixed with the fixed-side conductor 1a after being molded with the fixed-side insulating member 5a, or may be fixed with the fixed-side insulating member 5a after being fixed to the outer peripheral end portion of the fixed-side conductor 1a. It doesn't matter. The same applies to each embodiment described later.
  • the mover 3 is structured to perform opening and closing operations with the stationary contact 2a by operating in the left-right direction indicated by the arrows in FIG.
  • a fixed-side insulating member 5a extending from the fixed-side conductor 1a in the inter-pole direction (left-right direction indicated by the arrow in FIG. 1) and the tank direction (up-down direction in FIG. 1) is disposed near the tip of the fixed-side conductor 1a.
  • the curvature (circular shape) is formed on the inter-electrode side of the fixed-side insulating member 5a, thereby relaxing the electric field at the tip of the fixed-side conductor 1a.
  • FIG. 2 shows an intermediate stage of transition from the closed state to the open state in FIG. 1 (in the middle of the arc point), and an arc is generated between the stationary contact 2a and the tip of the mover 3. ing. Electromagnetic force acts on this arc by the magnetic field generated by the permanent magnet 10a installed at the position of this embodiment, and the current interruption performance can be enhanced by rotationally driving the arc.
  • This current interruption mechanism is the same as in Patent Documents 1, 3, 4, and 5.
  • Patent Documents 3 and 4 the arc heat is attached to a metal having high thermal conductivity, or the magnetism is deteriorated by being exposed to plasma that is extremely high at the time of arc generation, so that the performance over a long period of time. It was difficult to ensure.
  • the permanent magnet 10a can be arranged at a position closer to the arc than any of Patent Documents 1, 3, 4, and 5, and the magnetic field of the permanent magnet 10a can be efficiently arced. Therefore, the current interruption performance can be improved as compared with the conventional case. For this reason, the permanent magnet 10a can be made smaller than before.
  • the fixed-side insulating member 5a has low thermal conductivity, and can easily achieve sufficient performance as a heat insulating material for several tens of milliseconds, which is a normal arc time, and protects the permanent magnet 10a from arc heat. Can do.
  • FIG. 3 shows an open state, and since the permanent magnet 10a is disposed inside the fixed-side insulating member 5a, the electric field on the surface of the fixed-side insulating member 5a is reduced, and the small size of the permanent magnet 10a is shown. Therefore, the electric field on the surface of the fixed insulating member 5a is almost the same as when the permanent magnet 10a is not disposed due to the dielectric relaxation effect according to the relative dielectric constant of the fixed insulating member 5a. For this reason, it is possible to reduce the size of the disconnecting switch while improving the current interrupting performance as compared with the prior art.
  • the permanent magnet 10a can be disposed close to the arc, the magnetic force can be efficiently converted into an arc driving force, and the permanent magnet 10a is arced by the fixed-side insulating member 5a. Since it can insulate from heat, magnetic deterioration can be suppressed and interception performance can be secured over a long period of time.
  • the size of the disconnector can be reduced due to the dielectric relaxation effect of the fixed insulating member 5a, so that the disconnector can be reduced in size, and thus a small gas-insulated switchgear.
  • FIG. 4 and 5 show a gas-insulated disconnector that is Embodiment 2 of the switchgear of the present invention.
  • FIG. 4 shows a state at the time of closing
  • FIG. 5 shows a state at the time of opening.
  • a ring-shaped second permanent magnet is located at the distal end portion of the movable-side conductor 1b and on the interpole side with respect to the movable-side contactor 2b. 10b is installed, and the periphery of the second permanent magnet 10b is covered with the movable insulating member 5b.
  • the movable-side insulating member 5b can reduce the electric field at the tip of the movable-side conductor 1b, so that the outer diameter of the movable-side conductor 1b is smaller than that of the first embodiment. Accordingly, the tank diameter can be made thinner than that of the first embodiment.
  • FIG. 5 shows the opening time, and the electromagnetic force acting on the arc can be further increased.
  • electromagnetic force can be effectively applied to the arc starting points on the fixed side and the movable side, so that the permanent magnet 10a can be further reduced in size. It is. Further, since the distance between the poles can be shortened between the poles by the fixed insulating member 5a and the movable insulating member 5b, further miniaturization is possible as compared with the first embodiment.
  • FIG. 6 shows a gas-insulated disconnector that is Embodiment 3 of the switchgear of the present invention.
  • an arc contact 4 is provided inside the fixed-side conductor 1a, and a recess is formed at the tip of the mover 3. The recesses of the arc contact 4 and the mover 3 are contacted and separated.
  • FIG. 7 shows a gas-insulated disconnector that is Embodiment 4 of the switchgear of the present invention.
  • the present embodiment shown in the figure is an example in which two stages of permanent magnets are provided on the fixed side in addition to the configuration of the first embodiment.
  • a ring-shaped second permanent magnet 10c is provided adjacent to the permanent magnet 10a in the inter-pole direction of the ring-shaped permanent magnet 10a, and the permanent magnet 10a and the second permanent magnet 10c. Is covered with the fixed-side insulating member 5a, and the second permanent magnet 10c is supported by the fixed-side insulating member 5a.
  • the magnetic field that generates the arc driving force is a component in the tank radial direction. Therefore, the effect is obtained by matching the permanent magnet 10a having the same polarity with the second permanent magnet 10c. In particular, the magnetic field in the tank radial direction can be increased.
  • the presence of the permanent magnet 10a and the second permanent magnet 10c can halve the magnetic field for interrupting the arc. And the size of the second permanent magnet 10c can be reduced.
  • the permanent magnet is in a ring shape, but the same effect can be exhibited even if a large number of rectangular magnets are arranged in a ring shape.
  • FIG. 8 shows a gas-insulated disconnector that is Embodiment 4 of the switchgear of the present invention.
  • the present embodiment shown in the figure is an example in which a permanent magnet 11 in the mover is arranged near the tip of the mover 3 in addition to the configuration of the first embodiment.
  • the tip of the mover 3 becomes high temperature due to arc heat, so that the magnetic deterioration can be suppressed. If the permanent magnet 11 in the mover is disposed near the tip of the mover 3, the magnetic field of the tank radial direction component acting on the arc can be strengthened as shown in FIG. 8, and the fixed-side permanent magnet 10a is correspondingly increased. Can be miniaturized.
  • this invention is not limited to the above-mentioned Example, Various modifications are included.
  • the above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described.
  • a part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of one embodiment.
  • SYMBOLS 1a Fixed side conductor, 1b ... Movable side conductor, 2a ... Fixed side contactor, 2b ... Movable side contactor, 3 ... Movable element, 4 ... Arc contact, 5a ... Fixed side insulation member, 5b ... Movable side insulation member, 10a ... permanent magnet, 10b, 10c ... second permanent magnet, 11 ... permanent magnet in the mover.

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  • Arc-Extinguishing Devices That Are Switches (AREA)
PCT/JP2014/055904 2013-04-22 2014-03-07 開閉装置 Ceased WO2014174917A1 (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US14/783,000 US20160049268A1 (en) 2013-04-22 2014-03-07 Switchgear
CN201480022143.0A CN105122411A (zh) 2013-04-22 2014-03-07 开闭装置

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2013-089063 2013-04-22
JP2013089063A JP6029524B2 (ja) 2013-04-22 2013-04-22 開閉装置

Publications (1)

Publication Number Publication Date
WO2014174917A1 true WO2014174917A1 (ja) 2014-10-30

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ID=51791502

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2014/055904 Ceased WO2014174917A1 (ja) 2013-04-22 2014-03-07 開閉装置

Country Status (4)

Country Link
US (1) US20160049268A1 (enExample)
JP (1) JP6029524B2 (enExample)
CN (1) CN105122411A (enExample)
WO (1) WO2014174917A1 (enExample)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7162782B1 (ja) * 2022-03-31 2022-10-28 三菱電機株式会社 開閉装置

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111433878B (zh) * 2017-12-01 2022-08-23 株式会社东芝 气体断路器
JP6953329B2 (ja) * 2018-03-06 2021-10-27 株式会社日立産機システム 開閉器
JP7172960B2 (ja) * 2019-11-11 2022-11-16 三菱電機株式会社 ガス絶縁開閉装置
WO2021152646A1 (ja) * 2020-01-27 2021-08-05 三菱電機株式会社 ガス絶縁開閉装置
CN117242540A (zh) * 2021-04-28 2023-12-15 三菱电机株式会社 开关装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0221522A (ja) * 1988-07-08 1990-01-24 Fuji Electric Co Ltd ガス開閉機器
JP2007012518A (ja) * 2005-07-01 2007-01-18 Mitsubishi Electric Corp ガス遮断器
JP2007335148A (ja) * 2006-06-13 2007-12-27 Mitsubishi Electric Corp 開閉器

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0652761A (ja) * 1992-08-01 1994-02-25 Mitsubishi Electric Corp 開閉器
WO1994014177A1 (en) * 1992-12-16 1994-06-23 Nu-Lec Pty. Ltd. Arc extinguishing switch apparatus and method
JPH06335125A (ja) * 1993-03-12 1994-12-02 Mitsubishi Electric Corp 開閉装置
JP4522490B1 (ja) * 2009-06-25 2010-08-11 三菱電機株式会社 ガス絶縁開閉装置
WO2011104902A1 (ja) * 2010-02-26 2011-09-01 三菱電機株式会社 電流開閉器
CN102522252A (zh) * 2011-12-19 2012-06-27 中国西电电气股份有限公司 一种非sf6气体绝缘金属封闭隔离开关的断口结构
WO2013140619A1 (ja) * 2012-03-23 2013-09-26 三菱電機株式会社 電流開閉器

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0221522A (ja) * 1988-07-08 1990-01-24 Fuji Electric Co Ltd ガス開閉機器
JP2007012518A (ja) * 2005-07-01 2007-01-18 Mitsubishi Electric Corp ガス遮断器
JP2007335148A (ja) * 2006-06-13 2007-12-27 Mitsubishi Electric Corp 開閉器

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7162782B1 (ja) * 2022-03-31 2022-10-28 三菱電機株式会社 開閉装置
WO2023188287A1 (ja) * 2022-03-31 2023-10-05 三菱電機株式会社 開閉装置

Also Published As

Publication number Publication date
JP6029524B2 (ja) 2016-11-24
US20160049268A1 (en) 2016-02-18
CN105122411A (zh) 2015-12-02
JP2014212088A (ja) 2014-11-13

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