JP7221473B1 - gas insulated switchgear - Google Patents

gas insulated switchgear Download PDF

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JP7221473B1
JP7221473B1 JP2022570678A JP2022570678A JP7221473B1 JP 7221473 B1 JP7221473 B1 JP 7221473B1 JP 2022570678 A JP2022570678 A JP 2022570678A JP 2022570678 A JP2022570678 A JP 2022570678A JP 7221473 B1 JP7221473 B1 JP 7221473B1
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voltage conductor
contact
state
pipe portion
insulated switchgear
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航平 鍋倉
慎一朗 中内
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Mitsubishi Electric Corp
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Mitsubishi Electric Corp
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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
    • H01H33/60—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
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
    • H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
    • H02B13/035—Gas-insulated switchgear

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Gas-Insulated Switchgears (AREA)

Abstract

断路器（４１）を有するガス絶縁開閉装置であって、断路器（４１）は、第１の固定コンタクト（１１２ａ）及び第２の固定コンタクト（１１２ｂ）と、可動コンタクト（４ｆ）と、可動コンタクト（４ｆ）が第１の固定コンタクト（１１２ａ）及び第２の固定コンタクト（１１２ｂ）に接触する第１の状態と、非接触となる第２の状態とを切り替える絶縁ロッド（４ｄ）と、第２の状態のときに可動コンタクト（４ｆ）に接触するサージ抑制素子（４４）とを備え、断路器（４１）のタンク（１０）は、主管部（４ａ）と、主管部（４ａ）から枝分かれする枝管部（４ｂ）とを有し、第１の固定コンタクト（１１２ａ）及び第２の固定コンタクト（１１２ｂ）は、主管部（４ａ）に収容されており、サージ抑制素子（４４）は、枝管部（４ｂ）に収容されており、可動コンタクト（４ｆ）は、第２の状態では枝管部（４ｂ）に収容される。A gas-insulated switchgear having a disconnecting switch (41), the disconnecting switch (41) comprising a first stationary contact (112a) and a second stationary contact (112b), a movable contact (4f), and a movable contact. an insulating rod (4d) that switches between a first state in which (4f) is in contact with the first stationary contact (112a) and the second stationary contact (112b) and a second state in which it is out of contact; The tank (10) of the disconnecting switch (41) has a main pipe (4a) and branches from the main pipe (4a). a branch pipe portion (4b), the first fixed contact (112a) and the second fixed contact (112b) are housed in the main pipe portion (4a), and the surge suppression element (44) The movable contact (4f) is accommodated in the branch tube (4b) in the second state.

Description

本開示は、接地された金属製タンク内に断路器を収容したガス絶縁開閉装置に関するものである。 The present disclosure relates to a gas insulated switchgear with a disconnecting switch housed in a grounded metal tank.

ガス絶縁開閉装置は、接地された金属製のタンク内に、遮断器、断路器、接地開閉器、母線、避雷器、計器用変成器及び計器用変流器といった機器を収容している。隣接する機器同士は、つなぎ母線で接続されている。ガス絶縁開閉装置に適用される各機器のタンク内及びつなぎ母線のタンク内には絶縁ガスが充填されている。 A gas-insulated switchgear contains equipment such as a circuit breaker, a disconnecting switch, an earthing switch, a busbar, a lightning arrester, an instrument transformer, and an instrument current transformer in a grounded metal tank. Adjacent devices are connected by connecting busbars. Insulating gas is filled in the tank of each device and the tank of the connecting bus applied to the gas-insulated switchgear.

ガス絶縁開閉装置の断路器は、電源側と負荷側とに分かれた高電圧導体の各々の端部に設置された固定コンタクトと、移動可能に設置された可動コンタクトとを備え、可動コンタクトを移動させて可動コンタクトと固定コンタクトとの接触の有無を切替えることで、入状態と切状態とを切替える。ガス絶縁開閉装置の断路器には、直線摺動動作により可動コンタクトを固定コンタクトに接触させることで接点の入切を実施する構造のものと、ブレード型の可動コンタクトを回転動作させることで接点の入切を実施する構造のものとがある。どちらの構造においても、切状態の時には可動コンタクトを高圧導体内部に収納する。 A disconnecting switch for a gas insulated switchgear comprises a fixed contact installed at each end of a high voltage conductor divided into a power supply side and a load side, and a movable contact installed movably, and the movable contact is moved. Switching between the ON state and the OFF state is performed by switching the presence or absence of contact between the movable contact and the fixed contact. Disconnecting switches for gas-insulated switchgear include those that turn the contact on and off by bringing the movable contact into contact with the fixed contact through a linear sliding motion, and those that turn the blade-type movable contact to turn the contact. There is also a structure that implements turning on and off. In either construction, the movable contact is housed inside the high voltage conductor when in the off state.

例えば、特許文献１には、直線摺動動作により、切状態の時に可動コンタクトが電源側の高電圧導体である母線側電極に収容されるガス絶縁開閉装置が開示されている。 For example, Patent Literature 1 discloses a gas-insulated switchgear in which a movable contact is accommodated in a bus-side electrode, which is a high-voltage conductor on the power supply side, in the OFF state by linear sliding motion.

特開２０１４－９９３８１号公報JP 2014-99381 A

しかしながら、上記従来の技術では、母線側電極は、切状態の時に可動コンタクトを収容するために可動コンタクト以上の長さが必要であり、断路器のタンクが長くなってしまう。 However, in the above-described prior art, the bus-side electrode must be longer than the movable contact in order to accommodate the movable contact in the disconnected state, resulting in a long tank of the disconnecting switch.

さらに、タンク内の絶縁ガスがドライエアになった場合、絶縁ガスが６フッ化硫黄の場合と比較すると、切状態において電源側の固定コンタクトと負荷側の固定コンタクトとの間に必要な極間距離が長くなるため、入状態において電源側の固定コンタクトと負荷側の固定コンタクトとを接続する可動コンタクトを長くしなければならなくなる。可動コンタクトが長くなると、切状態の時に可動コンタクトを収容する高電圧導体も長くしなければならなくなるため、断路器のタンクがさらに長くなってしまう。 Furthermore, when the insulating gas in the tank is dry air, the required inter-electrode distance between the fixed contact on the power supply side and the fixed contact on the load side in the OFF state is greater than when the insulating gas is sulfur hexafluoride. is longer, the movable contact that connects the fixed contact on the power supply side and the fixed contact on the load side in the ON state must be lengthened. Longer movable contacts require longer high voltage conductors to house the movable contacts in the off state, thus making the tank of the disconnect switch even longer.

切状態の時に可動コンタクトを高電圧導体内部以外の場所に配置することも試みられているが、この構造の場合、帯電した可動コンタクトを接地する際に作業者が手を触れる可能性のあるタンクにサージ電圧が生じる問題があった。 Attempts have been made to place the movable contact in a place other than the inside of the high-voltage conductor when in the OFF state. There was a problem that surge voltage occurred in

このように、可動コンタクトを接地する際にタンクに生じるサージ電圧を抑制し、かつ断路器のタンクの小型化を図ったガス絶縁開閉装置は実現されていなかった。 Thus, a gas-insulated switchgear that suppresses the surge voltage generated in the tank when the movable contact is grounded and that reduces the size of the tank of the disconnecting switch has not been realized.

本開示は、上記に鑑みてなされたものであって、可動コンタクトを接地する際にタンクに生じるサージ電圧を抑制し、かつ断路器のタンクの小型化を図ったガス絶縁開閉装置を得ることを目的とする。 The present disclosure has been made in view of the above, and aims to obtain a gas-insulated switchgear that suppresses the surge voltage generated in the tank when the movable contact is grounded and that reduces the size of the tank of the disconnector. aim.

上述した課題を解決し、目的を達成するために、本開示に係るガス絶縁開閉装置は、絶縁ガスが封入されたタンクに収容された断路器を有するガス絶縁開閉装置であって、断路器は、電源側と負荷側とに分かれて配置された第１の高電圧導体及び第２の高電圧導体と、第１の高電圧導体の端部に設置された第１の固定コンタクトと、第２の高電圧導体の端部に設置された第２の固定コンタクトと、第１の固定コンタクト及び第２の固定コンタクトに接触することにより第１の高電圧導体と第２の高電圧導体との間に電路を形成する可動コンタクトと、可動コンタクトを移動させて、可動コンタクトが第１の固定コンタクト及び第２の固定コンタクトに接触する第１の状態と、可動コンタクトが第１の固定コンタクト及び第２の固定コンタクトに非接触となる第２の状態とを切り替える絶縁ロッドと、第２の状態のときに可動コンタクトに接触するサージ抑制素子とを備える。断路器のタンクは、第１の高電圧導体及び第２の高電圧導体が伸びる方向と同じ方向に伸びる主管部と、主管部から枝分かれする枝管部とを有する。第１の高電圧導体、第２の高電圧導体、第１の固定コンタクト及び第２の固定コンタクトは、主管部に収容されており、サージ抑制素子は、枝管部に収容されている。絶縁ロッドは、枝管部の軸方向に沿って直線摺動し、可動コンタクトは、第１の状態では主管部に収容され、第２の状態では枝管部に収容される。 In order to solve the above-described problems and achieve the object, a gas-insulated switchgear according to the present disclosure is a gas-insulated switchgear having a disconnector housed in a tank filled with insulating gas, wherein the disconnector is , a first high-voltage conductor and a second high-voltage conductor separately arranged on the power supply side and the load side, a first fixed contact installed at the end of the first high-voltage conductor, and a second between the first high voltage conductor and the second high voltage conductor by contacting the first stationary contact and the second stationary contact; a first state in which the movable contact is moved to contact the first fixed contact and the second fixed contact; and a first state in which the movable contact contacts the first fixed contact and the second fixed contact; and a surge suppression element that contacts the movable contact when in the second state. The disconnecting switch tank has a main pipe extending in the same direction as the first high voltage conductor and the second high voltage conductor, and a branch pipe branching off from the main pipe. The first high voltage conductor, the second high voltage conductor, the first stationary contact and the second stationary contact are housed in the main tube portion and the surge suppression element is housed in the branch tube portion. The insulating rod slides linearly along the axial direction of the branch pipe portion, and the movable contact is housed in the main pipe portion in the first state and is housed in the branch pipe portion in the second state.

本開示によれば、可動コンタクトを接地する際にタンクに生じるサージ電圧を抑制し、かつ断路器のタンクの小型化を図ったガス絶縁開閉装置を得られるという効果を奏する。 Advantageous Effects of Invention According to the present disclosure, it is possible to obtain a gas-insulated switchgear that suppresses the surge voltage generated in the tank when the movable contact is grounded and that reduces the size of the tank of the disconnecting switch.

実施の形態１に係るガス絶縁開閉装置の構成を示す図1 shows a configuration of a gas-insulated switchgear according to Embodiment 1. FIG. 実施の形態１に係るガス絶縁開閉装置の断路器の断面図Sectional view of disconnecting switch of gas insulated switchgear according to Embodiment 1 実施の形態１に係るガス絶縁開閉装置の断路器の断面図Sectional view of disconnecting switch of gas insulated switchgear according to Embodiment 1 実施の形態１に係るガス絶縁開閉装置の断路器の断面図Sectional view of disconnecting switch of gas insulated switchgear according to Embodiment 1 実施の形態２に係るガス絶縁開閉装置の断路器の断面図Cross-sectional view of disconnector of gas-insulated switchgear according to Embodiment 2 実施の形態２に係るガス絶縁開閉装置の断路器の断面図Cross-sectional view of disconnector of gas-insulated switchgear according to Embodiment 2

以下に、実施の形態に係るガス絶縁開閉装置を図面に基づいて詳細に説明する。 Gas-insulated switchgear according to embodiments will be described in detail below with reference to the drawings.

実施の形態１．
図１は、実施の形態１に係るガス絶縁開閉装置の構成を示す図である。ガス絶縁開閉装置１００は、遮断器２０、接地開閉器３１，３２、断路器４１，４２、計器用変成器６２、計器用変流器６１、母線７０及びブッシング８０を備える。母線７０と断路器４１とは、つなぎ母線９１，９２で接続されている。ブッシング８０と断路器４２とは、つなぎ母線９３で接続されている。遮断器２０、接地開閉器３１，３２、断路器４１，４２、計器用変成器６２、計器用変流器６１、母線７０、ブッシング８０及びつなぎ母線９１，９２，９３は、接地された金属製のタンク内に収容されている。遮断器２０、接地開閉器３１，３２、断路器４１，４２、計器用変成器６２、計器用変流器６１、母線７０、ブッシング８０及びつなぎ母線９１，９２，９３のタンク内には絶縁ガスが充填されている。ガス絶縁開閉装置１００は、給電用に用いられる場合、母線７０から受電し、ブッシング８０を通じて電力ケーブルに給電する。また、ガス絶縁開閉装置１００は、受電用に用いられる場合、ブッシング８０を通じて電力ケーブルから電力系統の電力が引き込まれ、母線７０に電力が給電される。Embodiment 1.
FIG. 1 is a diagram showing the configuration of a gas-insulated switchgear according to Embodiment 1. FIG. The gas-insulated switchgear 100 includes a circuit breaker 20 , earthing switches 31 and 32 , disconnecting switches 41 and 42 , an instrument transformer 62 , an instrument current transformer 61 , a bus 70 and a bushing 80 . The busbar 70 and the disconnecting switch 41 are connected by connecting busbars 91 and 92 . The bushing 80 and the disconnector 42 are connected by a connecting busbar 93 . Circuit breaker 20, grounding switches 31, 32, disconnecting switches 41, 42, instrument transformer 62, instrument current transformer 61, bus 70, bushing 80 and connecting bus 91, 92, 93 are grounded metal is housed in a tank of Insulating gas is contained in the tanks of circuit breaker 20, grounding switches 31, 32, disconnecting switches 41, 42, instrument transformer 62, instrument current transformer 61, bus 70, bushing 80, and connecting buses 91, 92, 93. is filled. When the gas-insulated switchgear 100 is used for power supply, it receives power from the busbar 70 and supplies power to the power cable through the bushing 80 . Further, when the gas-insulated switchgear 100 is used for receiving power, the power of the power system is drawn from the power cable through the bushing 80 and the power is supplied to the bus 70 .

以下の説明において、ガス絶縁開閉装置１００は、給電用に用いられるものとする。このため、以下の説明では、母線７０とブッシング８０との間に配置される遮断器２０、接地開閉器３１，３２、断路器４１，４２、計器用変成器６２、計器用変流器６１及びつなぎ母線９１，９２，９３について位置関係を説明する際に、母線７０側を電源側といい、ブッシング８０側を負荷側という。 In the following description, the gas-insulated switchgear 100 shall be used for power supply. Therefore, in the following description, circuit breaker 20, grounding switches 31 and 32, disconnecting switches 41 and 42, instrument transformer 62, instrument current transformer 61 and When describing the positional relationship of the connecting busbars 91, 92, and 93, the busbar 70 side is called the power supply side, and the bushing 80 side is called the load side.

図２、図３及び図４は、実施の形態１に係るガス絶縁開閉装置の断路器の断面図である。図２及び図３に示す断面は、後述する枝管部４ｂの軸方向に平行な断面であり、図４に示す断面は、後述する枝管部４ｂの軸方向に垂直な断面である。図２及び図４は、入状態の場合の断路器４１の断面を示している。なお、図２に示す断面は、図４中のII-II線に沿った断面であり、図４に示す断面は、図２中のIV-IV線に沿った断面である。図３は、切状態の場合の断路器４１の断面を示している。断路器４１のタンク１０の内部には、電源側と負荷側とに分かれて第１の高電圧導体１１１ａと、第２の高電圧導体１１１ｂとが配置されている。断路器４１のタンク１０は、主管部４ａと枝管部４ｂとを備えている。主管部４ａは、第１の高電圧導体１１１ａ及び第２の高電圧導体１１１ｂの長手方向に伸びる筒状である。枝管部４ｂは、主管部４ａから枝分かれする筒状である。主管部４ａと主管部４ａに隣接する機器である計器用変流器６１のタンク１２との間、及び主管部４ａと主管部４ａに隣接するつなぎ母線であるつなぎ母線９２のタンク１１との間には、絶縁スペーサ１２１が設置されている。このため、断路器４１のタンク１０は、隣接する計器用変流器６１のタンク１２又はつなぎ母線９２のタンク１１とは、ガス区分が分けられている。 2, 3 and 4 are cross-sectional views of the disconnector of the gas-insulated switchgear according to the first embodiment. The cross section shown in FIGS. 2 and 3 is a cross section parallel to the axial direction of the branch pipe portion 4b described later, and the cross section shown in FIG. 4 is a cross section perpendicular to the axial direction of the branch pipe portion 4b described later. 2 and 4 show cross sections of the disconnector 41 in the on state. 2 is taken along line II-II in FIG. 4, and the section shown in FIG. 4 is taken along line IV-IV in FIG. FIG. 3 shows a cross section of the disconnector 41 in the off state. Inside the tank 10 of the disconnecting switch 41, a first high voltage conductor 111a and a second high voltage conductor 111b are arranged separately for the power supply side and the load side. The tank 10 of the disconnector 41 includes a main pipe portion 4a and a branch pipe portion 4b. The main pipe portion 4a has a tubular shape extending in the longitudinal direction of the first high-voltage conductor 111a and the second high-voltage conductor 111b. The branch pipe portion 4b has a tubular shape that branches off from the main pipe portion 4a. Between the main pipe portion 4a and the tank 12 of the instrument current transformer 61, which is a device adjacent to the main pipe portion 4a, and between the main pipe portion 4a and the tank 11 of the connecting bus line 92, which is a connecting bus line adjacent to the main pipe portion 4a. is provided with an insulating spacer 121 . For this reason, the tank 10 of the disconnecting switch 41 is separated from the tank 12 of the instrument current transformer 61 or the tank 11 of the connecting bus 92 adjacent thereto in terms of gas.

第１の高電圧導体１１１ａと第２の高電圧導体１１１ｂとは、同軸上に配置されている。第１の高電圧導体１１１ａの端部には、第１の固定コンタクト１１２ａが設置されている。第２の高電圧導体１１１ｂの端部には、第２の固定コンタクト１１２ｂが設置されている。第１の固定コンタクト１１２ａと第２の固定コンタクト１１２ｂとの間には、隙間が形成されている。 The first high voltage conductor 111a and the second high voltage conductor 111b are coaxially arranged. A first fixed contact 112a is installed at the end of the first high voltage conductor 111a. A second fixed contact 112b is installed at the end of the second high voltage conductor 111b. A gap is formed between the first stationary contact 112a and the second stationary contact 112b.

枝管部４ｂは、第１の高電圧導体１１１ａ及び第２の高電圧導体１１１ｂの長手方向と直交する方向に伸びる筒状である。主管部４ａの中心軸の方向と、枝管部４ｂの中心軸の方向とは９０度異なっている。枝管部４ｂは、端面４ｃを有する。枝管部４ｂには、絶縁ロッド４ｄが設置されている。絶縁ロッド４ｄは、端面４ｃを貫通して断路器４１のタンク１０の外に突出しており、断路器４１のタンク１０の外部において断路器操作装置４３の不図示のリンク機構に連結されている。断路器４１のタンク１０内に配置されている絶縁ロッド４ｄの端部には、ブレード型の可動コンタクト４ｆが設置されている。また、枝管部４ｂには、サージ抑制素子４４が設置されている。枝管部４ｂの端面４ｃには、サージ抑制素子４４が固定されている。サージ抑制素子４４は、例えば抵抗素子とインダクタンス素子とである。 The branch tube portion 4b has a tubular shape extending in a direction perpendicular to the longitudinal direction of the first high-voltage conductor 111a and the second high-voltage conductor 111b. The direction of the central axis of the main pipe portion 4a differs from the direction of the central axis of the branch pipe portion 4b by 90 degrees. The branch pipe portion 4b has an end surface 4c. An insulating rod 4d is installed in the branch pipe portion 4b. The insulating rod 4 d protrudes outside the tank 10 of the disconnecting switch 41 through the end surface 4 c and is connected to a link mechanism (not shown) of the disconnecting switch operating device 43 outside the tank 10 of the disconnecting switch 41 . A blade-type movable contact 4f is installed at the end of the insulating rod 4d of the disconnecting switch 41 disposed in the tank 10 . A surge suppression element 44 is installed in the branch pipe portion 4b. A surge suppression element 44 is fixed to the end face 4c of the branch pipe portion 4b. The surge suppression element 44 is, for example, a resistance element and an inductance element.

断路器操作装置４３が不図示のリンク機構を介して絶縁ロッド４ｄを枝管部４ｂの軸方向に直線摺動させる。絶縁ロッド４ｄは、可動コンタクト４ｆを移動させて、可動コンタクト４ｆが第１の固定コンタクト１１２ａ及び第２の固定コンタクト１１２ｂに接触する第１の状態である入状態と、可動コンタクト４ｆが第１の固定コンタクト１１２ａ及び第２の固定コンタクト１１２ｂに非接触となる第２の状態である切状態とを切り替える。すなわち、断路器操作装置４３が絶縁ロッド４ｄを直線摺動させることにより、第１の固定コンタクト１１２ａと第２の固定コンタクト１１２ｂとの間に可動コンタクト４ｆが挿入された入状態と、第１の固定コンタクト１１２ａ及び第２の固定コンタクト１１２ｂと可動コンタクト４ｆとが離れた切状態との切り替えがなされる。可動コンタクト４ｆは、第１の状態では主管部４ａに収容され、第２の状態では枝管部４ｂに収容される。 The disconnecting switch operating device 43 linearly slides the insulating rod 4d in the axial direction of the branch pipe portion 4b via a link mechanism (not shown). The insulating rod 4d moves the movable contact 4f to enter an on state, which is a first state in which the movable contact 4f contacts the first fixed contact 112a and the second fixed contact 112b, and a state in which the movable contact 4f is in the first state. Switching is made between the OFF state, which is the second state in which the stationary contact 112a and the second stationary contact 112b are not in contact with each other. That is, by linearly sliding the insulating rod 4d by the disconnecting switch operation device 43, the on state in which the movable contact 4f is inserted between the first fixed contact 112a and the second fixed contact 112b, and the first Switching is made between the off state in which the fixed contact 112a and the second fixed contact 112b are separated from the movable contact 4f. The movable contact 4f is housed in the main pipe portion 4a in the first state, and is housed in the branch pipe portion 4b in the second state.

図４に示すように、枝管部４ｂの軸方向に垂直な断面において、第１の固定コンタクト１１２ａ及び第２の固定コンタクト１１２ｂは凹形状となっている。一方、枝管部４ｂの軸方向に垂直な断面において、可動コンタクト４ｆは、Ｉ形状となっている。第１の固定コンタクト１１２ａ及び第２の固定コンタクト１１２ｂの凹の中に可動コンタクト４ｆが挿入されることにより、第１の高電圧導体１１１ａと第２の高電圧導体１１１ｂとの間に電路が形成される。 As shown in FIG. 4, the first stationary contact 112a and the second stationary contact 112b are concave in a cross section perpendicular to the axial direction of the branch tube portion 4b. On the other hand, the movable contact 4f has an I shape in a cross section perpendicular to the axial direction of the branch tube portion 4b. By inserting the movable contact 4f into the recesses of the first fixed contact 112a and the second fixed contact 112b, an electric path is formed between the first high voltage conductor 111a and the second high voltage conductor 111b. be done.

図３に示すように、切状態では、可動コンタクト４ｆは枝管部４ｂに収容される。枝管部４ｂに収容された可動コンタクト４ｆは、サージ抑制素子４４に押し当てられ、可動コンタクト４ｆの残留電荷は、サージ抑制素子４４に電圧が分担されることでタンク１０に生じるサージ電圧を抑制しつつ放電される。 As shown in FIG. 3, in the disconnected state, the movable contact 4f is accommodated in the branch tube portion 4b. The movable contact 4f accommodated in the branch pipe portion 4b is pressed against the surge suppressing element 44, and the residual charge of the movable contact 4f suppresses the surge voltage generated in the tank 10 by sharing the voltage with the surge suppressing element 44. discharges while

ここでは断路器４１の内部の構造について説明したが、断路器４２の内部も同様の構造となっている。すなわち、断路器４２のタンク１０も、主管部４ａと枝管部４ｂとを備えており、主管部４ａの内部には、第１の高電圧導体１１１ａと第２の高電圧導体１１１ｂとは、同軸上に配置されている。第１の高電圧導体１１１ａの端部には、第１の固定コンタクト１１２ａが設置されている。第２の高電圧導体１１１ｂの端部には、第２の固定コンタクト１１２ｂが設置されている。枝管部４ｂには、絶縁ロッド４ｄが配置されており、絶縁ロッド４ｄの端部にはブレード型の可動コンタクト４ｆが設置されている。断路器操作装置４３が不図示のリンク機構を介して絶縁ロッド４ｄを直線摺動動作させることにより、第１の固定コンタクト１１２ａと第２の固定コンタクト１１２ｂとの間に可動コンタクト４ｆが挿入された入状態と、第１の固定コンタクト１１２ａ及び第２の固定コンタクト１１２ｂと可動コンタクト４ｆとが離れた切状態との切り替えがなされる。 Although the internal structure of the disconnecting switch 41 has been described here, the internal structure of the disconnecting switch 42 is similar. That is, the tank 10 of the disconnecting switch 42 also includes a main pipe portion 4a and a branch pipe portion 4b. arranged coaxially. A first fixed contact 112a is installed at the end of the first high voltage conductor 111a. A second fixed contact 112b is installed at the end of the second high voltage conductor 111b. An insulating rod 4d is arranged in the branch pipe portion 4b, and a blade-shaped movable contact 4f is installed at the end of the insulating rod 4d. The movable contact 4f is inserted between the first fixed contact 112a and the second fixed contact 112b by the disconnecting switch operation device 43 linearly sliding the insulating rod 4d via a link mechanism (not shown). Switching is performed between the ON state and the OFF state in which the first fixed contact 112a and the second fixed contact 112b are separated from the movable contact 4f.

実施の形態１に係るガス絶縁開閉装置１００は、断路器４１，４２が切状態の時に可動コンタクト４ｆを第１の高電圧導体１１１ａ又は第２の高電圧導体１１１ｂ内部に収容する必要がないため、第１の高電圧導体１１１ａ及び第２の高電圧導体１１１ｂを短くし、断路器４１，４２のタンク１０を小型化することができる。また、断路器４１，４２が切状態の時には、可動コンタクト４ｆは枝管部４ｂに設置されたサージ抑制素子４４に接触するため、可動コンタクト４ｆを接地する際にタンク１０に生じるサージ電圧を抑制することができる。 In the gas-insulated switchgear 100 according to Embodiment 1, it is not necessary to accommodate the movable contact 4f inside the first high-voltage conductor 111a or the second high-voltage conductor 111b when the disconnectors 41 and 42 are in the OFF state. , the first high-voltage conductor 111a and the second high-voltage conductor 111b can be shortened, and the tanks 10 of the disconnectors 41 and 42 can be miniaturized. Further, when the disconnecting switches 41 and 42 are in the OFF state, the movable contact 4f comes into contact with the surge suppression element 44 installed in the branch pipe portion 4b, thereby suppressing the surge voltage generated in the tank 10 when the movable contact 4f is grounded. can do.

実施の形態２．
図５及び図６は、実施の形態２に係るガス絶縁開閉装置の断路器の断面図である。図５は、入状態の場合の断路器４１の断面を示している。図６は、切状態の場合の断路器４１の断面を示している。実施の形態２に係るガス絶縁開閉装置１００の断路器４１，４２は、第１の高電圧導体１１１ａの中心軸の方向と第２の高電圧導体１１１ｂの中心軸の方向とが９０度異なっており、枝管部４ｂの中心軸の方向は、第１の高電圧導体１１１ａの中心軸の方向と同じ方向である。Embodiment 2.
5 and 6 are cross-sectional views of a disconnector of a gas-insulated switchgear according to Embodiment 2. FIG. FIG. 5 shows a cross section of the disconnector 41 in the ON state. FIG. 6 shows a cross section of the disconnector 41 in the off state. In the disconnecting switches 41 and 42 of the gas-insulated switchgear 100 according to Embodiment 2, the direction of the central axis of the first high-voltage conductor 111a is different from the direction of the central axis of the second high-voltage conductor 111b by 90 degrees. The direction of the central axis of the branch tube portion 4b is the same as the direction of the central axis of the first high-voltage conductor 111a.

実施の形態１に係るガス絶縁開閉装置１００と同様に、入状態では第１の固定コンタクト１１２ａと第２の固定コンタクト１１２ｂとの間に可動コンタクト４ｆが挿入された切状態では、枝管部４ｂに可動コンタクト４ｆが収容される。枝管部４ｂに収容された可動コンタクト４ｆは、サージ抑制素子４４に押し当てられ、可動コンタクト４ｆの残留電荷は、サージ抑制素子４４に電圧が分担されることでタンク１０に生じるサージ電圧を抑制しつつ放電される。 As in the gas-insulated switchgear 100 according to Embodiment 1, in the ON state, the movable contact 4f is inserted between the first fixed contact 112a and the second fixed contact 112b. accommodates the movable contact 4f. The movable contact 4f accommodated in the branch pipe portion 4b is pressed against the surge suppressing element 44, and the residual charge of the movable contact 4f suppresses the surge voltage generated in the tank 10 by sharing the voltage with the surge suppressing element 44. discharges while

なお、ここでは枝管部４ｂの伸びる方向が第１の高電圧導体１１１ａの中心軸の方向と同じ方向であったが、枝管部４ｂは、第２の高電圧導体１１１ｂの中心軸と同じ方向に伸びていてもよい。 Although the branch pipe portion 4b extends in the same direction as the central axis of the first high-voltage conductor 111a here, the branch pipe portion 4b extends in the same direction as the central axis of the second high-voltage conductor 111b. It may extend in any direction.

実施の形態２に係るガス絶縁開閉装置１００は、第１の高電圧導体１１１ａと第２の高電圧導体１１１ｂとが伸びる方向が異なる箇所に断路器４１，４２を配置することができる。このため、ガス絶縁開閉装置１００のレイアウトの自由度が向上し、設置スペースを小さくすることができる。 In the gas-insulated switchgear 100 according to Embodiment 2, the disconnecting switches 41 and 42 can be arranged at locations where the first high-voltage conductor 111a and the second high-voltage conductor 111b extend in different directions. Therefore, the degree of freedom in layout of the gas-insulated switchgear 100 is improved, and the installation space can be reduced.

以上の実施の形態に示した構成は、内容の一例を示すものであり、別の公知の技術と組み合わせることも可能であるし、要旨を逸脱しない範囲で、構成の一部を省略、変更することも可能である。 The configuration shown in the above embodiment shows an example of the contents, and it is possible to combine it with another known technique, and part of the configuration is omitted or changed without departing from the scope. is also possible.

４ａ 主管部、４ｂ 枝管部、４ｃ 端面、４ｄ 絶縁ロッド、４ｆ 可動コンタクト、１０，１１，１２ タンク、２０ 遮断器、３１，３２ 接地開閉器、４１，４２ 断路器、４３ 断路器操作装置、４４ サージ抑制素子、６１ 計器用変流器、６２ 計器用変成器、７０ 母線、８０ ブッシング、９１，９２，９３ つなぎ母線、１００ ガス絶縁開閉装置、１１１ａ 第１の高電圧導体、１１１ｂ 第２の高電圧導体、１１２ａ 第１の固定コンタクト、１１２ｂ 第２の固定コンタクト、１２１ 絶縁スペーサ。 4a main pipe portion, 4b branch pipe portion, 4c end surface, 4d insulating rod, 4f movable contact, 10, 11, 12 tank, 20 circuit breaker, 31, 32 grounding switch, 41, 42 disconnector, 43 disconnector operating device, 44 surge suppression element, 61 instrument current transformer, 62 instrument transformer, 70 busbar, 80 bushing, 91, 92, 93 connecting busbar, 100 gas insulated switchgear, 111a first high voltage conductor, 111b second High voltage conductor, 112a first stationary contact, 112b second stationary contact, 121 insulating spacer.

Claims (4)

絶縁ガスが封入されたタンクに収容された断路器を有するガス絶縁開閉装置であって、
前記断路器は、
電源側と負荷側とに分かれて配置された第１の高電圧導体及び第２の高電圧導体と、
前記第１の高電圧導体の端部に設置された第１の固定コンタクトと、
前記第２の高電圧導体の端部に設置された第２の固定コンタクトと、
前記第１の固定コンタクト及び前記第２の固定コンタクトに接触することにより前記第１の高電圧導体と前記第２の高電圧導体との間に電路を形成する可動コンタクトと、
前記可動コンタクトを移動させて、前記可動コンタクトが前記第１の固定コンタクト及び前記第２の固定コンタクトに接触する第１の状態と、前記可動コンタクトが前記第１の固定コンタクト及び前記第２の固定コンタクトに非接触となる第２の状態とを切り替える絶縁ロッドと、
前記第２の状態のときに前記可動コンタクトに接触するサージ抑制素子とを備え、
前記断路器のタンクは、前記第１の高電圧導体及び前記第２の高電圧導体が伸びる方向と同じ方向に伸びる主管部と、前記主管部から枝分かれする枝管部とを有し、
前記第１の高電圧導体、前記第２の高電圧導体、前記第１の固定コンタクト及び前記第２の固定コンタクトは、前記主管部に収容されており、
前記サージ抑制素子は、前記枝管部に収容されており、
前記絶縁ロッドは、前記枝管部の軸方向に沿って直線摺動し、前記可動コンタクトは、前記第１の状態では前記主管部に収容され、前記第２の状態では前記枝管部に収容されることを特徴とするガス絶縁開閉装置。A gas insulated switchgear having a disconnector housed in a tank filled with insulating gas,
The disconnector is
a first high-voltage conductor and a second high-voltage conductor arranged separately on a power supply side and a load side;
a first stationary contact located at the end of the first high voltage conductor;
a second fixed contact located at the end of the second high voltage conductor;
a movable contact forming an electrical path between the first high voltage conductor and the second high voltage conductor by contacting the first stationary contact and the second stationary contact;
a first state in which the movable contact is moved to contact the first fixed contact and the second fixed contact; and a first state in which the movable contact contacts the first fixed contact and the second fixed contact. an insulating rod that switches between a second state in which the contact is out of contact;
a surge suppression element that contacts the movable contact when in the second state;
The tank of the disconnecting switch has a main pipe portion extending in the same direction as the direction in which the first high-voltage conductor and the second high-voltage conductor extend, and a branch pipe portion branching from the main pipe portion,
The first high-voltage conductor, the second high-voltage conductor, the first stationary contact, and the second stationary contact are accommodated in the main tube,
The surge suppression element is housed in the branch pipe,
The insulating rod linearly slides along the axial direction of the branch pipe portion, and the movable contact is housed in the main pipe portion in the first state and is housed in the branch pipe portion in the second state. A gas insulated switchgear characterized by: 前記第１の高電圧導体と前記第２の高電圧導体とは同軸上に配置されており、前記主管部の中心軸の方向と、前記枝管部の中心軸の方向とが９０度異なることを特徴とする請求項１に記載のガス絶縁開閉装置。 The first high-voltage conductor and the second high-voltage conductor are arranged coaxially, and the direction of the central axis of the main pipe differs from the direction of the central axis of the branch pipe by 90 degrees. The gas insulated switchgear according to claim 1, characterized by: 前記第１の高電圧導体の中心軸の方向と前記第２の高電圧導体の中心軸の方向とが９０度異なっており、
前記枝管部の中心軸の方向は、前記第１の高電圧導体の中心軸の方向又は前記第２の高電圧導体の中心軸の方向と同じ方向であることを特徴とする請求項１に記載のガス絶縁開閉装置。The direction of the central axis of the first high voltage conductor and the direction of the central axis of the second high voltage conductor are different by 90 degrees,
2. The method according to claim 1, wherein the direction of the central axis of the branch tube portion is the same as the direction of the central axis of the first high-voltage conductor or the direction of the central axis of the second high-voltage conductor. Gas insulated switchgear as described. 前記サージ抑制素子は、抵抗素子とインダクタンス素子とであることを特徴とする請求項１から３のいずれか１項に記載のガス絶縁開閉装置。 4. The gas insulated switchgear according to any one of claims 1 to 3, wherein the surge suppression element is a resistance element and an inductance element.
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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5043228U (en) * 1973-08-18 1975-05-01
JPS5894724A (en) * 1981-11-30 1983-06-06 株式会社日立製作所 Disconnecting switch
JPH0257207U (en) * 1988-10-12 1990-04-25
JPH0739048A (en) * 1993-06-28 1995-02-07 Toshiba Corp Gas insulated switchgear
JP5043228B2 (en) 2011-11-24 2012-10-10 株式会社藤商事 Bullet ball machine
JP5894724B2 (en) 2006-08-10 2016-03-30 アビニシオ テクノロジー エルエルシー Distributed service of graph type calculation

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5043228U (en) * 1973-08-18 1975-05-01
JPS5894724A (en) * 1981-11-30 1983-06-06 株式会社日立製作所 Disconnecting switch
JPH0257207U (en) * 1988-10-12 1990-04-25
JPH0739048A (en) * 1993-06-28 1995-02-07 Toshiba Corp Gas insulated switchgear
JP5894724B2 (en) 2006-08-10 2016-03-30 アビニシオ テクノロジー エルエルシー Distributed service of graph type calculation
JP5043228B2 (en) 2011-11-24 2012-10-10 株式会社藤商事 Bullet ball machine

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