JP3876356B2 - Gas insulated switchgear - Google Patents

Gas insulated switchgear Download PDF

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Publication number
JP3876356B2
JP3876356B2 JP2001564429A JP2001564429A JP3876356B2 JP 3876356 B2 JP3876356 B2 JP 3876356B2 JP 2001564429 A JP2001564429 A JP 2001564429A JP 2001564429 A JP2001564429 A JP 2001564429A JP 3876356 B2 JP3876356 B2 JP 3876356B2
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Prior art keywords
gas
bushing
tank
gas insulated
insulated switchgear
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Japanese (ja)
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万幸樹 八田
裕彦 八塚
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Hitachi Ltd
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Hitachi Ltd
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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
    • H01H33/02—Details
    • H01H33/53—Cases; Reservoirs, tanks, piping or valves, for arc-extinguishing fluid; Accessories therefor, e.g. safety arrangements, pressure relief devices
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B5/00—Non-enclosed substations; Substations with enclosed and non-enclosed equipment
    • H02B5/06—Non-enclosed substations; Substations with enclosed and non-enclosed equipment gas-insulated

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

Description

【発明の属する技術分野】
本発明は、ガス絶縁開閉装置に関する。
【従来の技術】
通常、ガス絶縁開閉装置は、絶縁性ガスを封入した金属ケースのタンク内に、開閉機器等の各種の機器を収納し、タンクを接地して構成している。架空線から開閉機器等の機器に至る途中にはガスブッシングが用いられるが、ガスブツシングの取付位置が低く、地表面に近い場合には、地表面付近でも高電界となり、近接する人や物に悪影響を及ぼすことが考えられる。そこで従来は、ブッシング下部の外周に電界制御用の接地シールドを取付けたり、ガスブッシングの取付位置を高くする等の工夫がなされている。
【発明が解決しようとする課題】
しかし、接地シールドを設けることはガス絶縁開閉装置のコストアッブ要因となり好ましいものではなく、また、ガスブッシングの取り付け位置を高くすると、ガスブッシングが高層化し、ガス絶縁開閉装置の小型、低層化に逆行するものであり、問題であった。
本発明の代表的な目的は、上記の問題点に鑑みて、ガスブッシングを低層化しつつ、また電界制御用の接地シールド等を設けることなく、近傍の地表面電界強度を低下させたガス絶縁開閉装置を提供することである。
また、本発明の別の代表的な目的は、作業員への負担を低減できるようにすることにある。
【課題を解決するための手段】
上記目的を達成するために、本発明は、電力引込口または電力引出口に、ガスブッシングを備えるガス絶縁開閉装置において、前記ガスブッシングの下部に設けられるブッシング下部タンクに、当該ブッシングの中心軸に対してほぼ直角方向に、地上１メートルの高さにおける電界強度が１００Ｖ／ｃｍを越えないように、３つ（或いは、４つ）の分岐タンクを設置することにある。
また、前記各分岐タンクは、同一平面内で前記ガスブッシングの中心軸から、３つの場合１２０°毎に、又４つの場合９０°毎に放射状に伸びて設置されること、また、前記各分岐タンクは接地面に対して所定の高さ以上に設置される。また、分岐タンクとしては、タンク形避雷器、変成器、ガス絶縁母線、カバーおよび送電線用接地開閉器の各タンクがあるが、その組合せとしては、タンク形避雷器、変成器、ガス絶縁母線、およびカバー、またはタンク形避雷器、変成器、ガス絶縁母線、および送電線用接地開閉器、もしくはタンク形避雷器、変成器、ガス絶縁母線、および前記ガス絶縁母線と異なる方向に分岐されるガス絶縁母線等のタンクがある。
【発明の効果】
本発明によれば、接地電位がブッシング下部タンクから分岐した各タンクになるので、ガスブッシング近傍の接地面付近の電界を低下させることができ、人や物に対する悪影響を除去することができる。また、従来必要とされていたブッシング下部シールドを省略し、ガスブッシング取付位置の低層化を図ることができる。
【発明を実施するための最良の形態】
以下、本発明を実施するための最良の形態を具体的な実施例によって説明する。
【実施例１】
図１は本実施例に係るガス絶縁開閉装置の構成を示す正面図、図２は図１に示すガスブッシング近傍の構成を示す平面図、図３は図１に示すガスブッシング近傍の構成を示す側面図である。
図１に示すように、このガス絶縁開閉装置は、ガスブッシング１、ブッシング下部タンク２、タンク形避雷器３、巻線形または光変換形の変成器４、ガス絶縁母線５、カバー６、断路器７、変流器８、遮断器９、主母線１０等から構成される。ガスブッシング１は、外側は碍子で、また、中心軸部は導体で形成されている。架空線からの電力は、ガスブッシング１の上部の引込線部から、碍子の中心軸部の導体を通って、ブッシング下部タンク２に伝達される。ブッシング下部タンク２、タンク形避雷器３、巻線形または光変換形の変成器４、ガス絶縁母線５、カバー６、断路器７、変流器８、遮断器９、主母線１０は、それぞれ、絶縁性ガスを封入した金属ケース（以下、タンクと略す）内に開閉機器等の各種機器を収納して構成され、また、タンクを接地している。
また、図１ないし図３に示すように、ガスブッシング１のブッシング下部タンク２には、ガスブッシング１の中心軸に対して、ほぼ直角方向、かつ４方向に分岐部を有している。
各々の分岐部には、図２に示すように、各分岐部がほぼ９０°毎に設けられており、各々の分岐部には、タンク形避雷器３、巻線形または光変換形の変成器４、ガス絶縁母線５、およびカバー６の各タンクが接続されている。
ブッシング下部タンク２に導かれた電力は、ガス絶縁母線５を通って、断路器７、変圧器８、主母線１０に導かれる。また、架空線から導かれた電力はブッシング下部タンク２よりタンク形避雷器３に導かれる。タンク形避雷器３は通常高抵抗であるが、架空線に避雷があったとき等の緊急時に低抵抗となり、避雷の役割を行う。また、巻線形または光変換形の変成器４は架空線の電圧を計測することを目的として設置される。カバー６は、避雷或いは計測等の特定の用途に用いられるものではないが、後述する、ガスブッシング１の近傍の電界分布の低下の為に、設置されたものである。
このように、本実施例のガス絶縁開閉装置によれば、ブッシング下部タンク２から分岐したタンク形避雷器３、変成器４、ガス絶縁母線５、およびカバー６の各タンクが接地電位となるので、ガスブッシング１の近傍の電界分布が、図３に示すように、ブッシング下部タンク２から分岐したタンク形避雷器３、変成器４、ガス絶縁母線５、およびカバー６の各タンクの上位に至り、ガスブッシング近傍の接地面付近の電界を低下させることができ、人１１や物に対する悪影響を除去することができる。
なお、ブッシング下部タンク２から、タンク形避雷器３と変成器４への分岐と、ガス絶縁母線５とカバー６への分岐の高さは、タンク２の製作上の制約により若干異なっているが、同一高さで分岐する方が接地面付近での電界分布が均一化されより優れた効果が得られる。また、本発明の効果を得るためには、各分岐部に接続される各タンクは、少なくとも人間の背の高さよりも高い位置に設置される必要がある。これにより、ガスブッシング近傍の人や物に影響を与えないようにすることができる。
なお、ブッシング下部タンク２から分岐したタンク形避雷器３、変成器４、ガス絶縁規線５、およびカバー６の各タンクの設置については、地上１メートルの高さにおける電界強度が１００Ｖ／ｃｍを越えないように設けられる。また、カバー６の突出長さは、定格電圧が５５０ｋＶ以上であると２．５メートル以上であり、定格電圧が５５０ｋＶより小さく３００ｋＶより大きい場合には１．５メートル以上であり、定格電圧が３００ｋＶより小さく１６０ｋＶ以上の場合には１．０メートル以上であることが望ましい。
【実施例２】
図４は本実施例に係るガス絶縁開閉装置のガスブッシング近傍の構成を示す正面図、図５は図４に示すガスブッシング近傍の構成を示す平面図、図６は図４に示すガスブッシング近傍の構成を示す側面図でおる。
これらの図において、１２はブッシング下部タンク２の分岐部に接続される送電線用接地開閉器であり、その他の構成は図１ないし図３に示す同符号の構成に対応する。
本実施例のガス絶縁開閉装置は、実施例１のカバー６に代えて、送電線用接地開閉器１２を接続したものであり、実施例１の場合と同様に、ブッシング下部タンク２から分岐したタンク形避雷器３、変成器４、ガス絶縁母線５、および送電線用接地開閉器１２の各タンクが接地電位となるので、ガスブッシング１の近傍の電界分布が、ブッシング下部タンク２から分岐したタンク形避雷器３、変成器４、ガス絶縁母線５、および送電線用接地開閉器２の各タンクの上位に至り、ガスブッシング近傍の接地面付近の電界を低くすることができる。
【実施例３】
図７は本実施例に係るガス絶縁開閉装置のガスブッシング近傍の構成を示す正面図、図８は図７に示すガスブッシング近傍の構成を示す平面図、図９は図８を左側から見たガスブッシング近傍の構成を示す側面図である。
これらの図において、１３はブッシング下部タンク２の分岐部に接続されるガス絶縁母線であり、その他の構成は図１ないし図３に示す同符号の構成に対応する。
本実施例のガス絶縁開閉装置は、実施例１のカバー６に代えて、ガス絶縁母線１３を接続したものであり、実施例１の場合と同様に、ブッシング下部タンク２から分岐したタンク形避雷器３、変成器４、ガス絶縁母線５,１３の各タンクが接地電位となるので、ガスブッシング１の近傍の電界分布が、ブッシング下部タンク２から分岐したタンク形避雷器３、変成器４、ガス絶縁母線５,１３の各タンクの上位に至り、ガスブッシング近傍の接地面付近の電界を低くすることができる。
【実施例４】
図１０は本実施例に係るガス絶縁開閉装置のガスブッシング近傍の構成を示す平面図でおる。この図において、タンク形避雷器３、巻線形または光変換形の変成器４、ガス絶縁母線５が、それぞれ、２０度の等間隔で設けられている。その他の構成は、図１ないし図３に示す同符号の構成に対応する。
実施例１が、タンク形避雷器３、巻線形または光変換形の変成器４、ガス絶縁母線５及びカバー６の４つのタンクにより構成されているのに対して、本実施例のガス絶縁開閉装置は、タンク形避雷器３、巻線形または光変換形の変成器４、ガス絶縁母線５の３つのタンクで構成可能であり、より簡便に、ガスブッシング近傍の設置面付近の電界を低くすることができる。なお、各タンクの間隔は１２０°でなくても、これらの何れもが９０°より大きければ、ガスブッシング近傍の設置面付近の電界を低くすることができる。
【実施例５】
図１１は本実施例に係るガス絶縁開閉装置のガスブッシング近傍の構成を示す正面図である。この図においてくカバー６の代わりに、ブッシング下部タンク２から竃界制御用の接地シールド２０を分岐させたものである。その他の構成は、図１ないし図３に示す同符号の構成に対応する。
実施例１が。タンク形避雷器３、巻線形または光変換形の変成器４、ガス絶縁母線５に加えて、カバー６をブッシング下部タンク２から分岐させているが、本実施例のガス絶縁開閉装置は、電界制御用の接地シールド２０でほぼ同様にガスブッシング近傍の設置面付近の電界を低くすることができ、より簡便な構造で実現できる。
【図面の簡単な説明】
【図１】本発明の実施例１に係るガス絶縁開閉装置の構成を示す正面図である。
【図２】図１に示すガス絶縁開閉装置のガスブッシング近傍の構成を示す平面図である。
【図３】図１に示すガス絶縁開閉装置のガスブッシング近傍の構成を示す側面図である。
【図４】本発明の実施例２に係るガス絶縁開閉装置のガスブッシング近傍の構成を示す正面図である。
【図５】図４に示すガス絶縁開閉装置のガスブッシング近傍の構成を示す平面図である。
【図６】図４に示すガス絶縁開閉装置のガスブッシング近傍の構成を示す側面図である。
【図７】本発明の実施例３に係るガス絶縁開閉装置のガスブッシング近傍の構成を示す正面図である。
【図８】図７に示すガス絶縁開閉装置のガスブッシング近傍の構成を示す平面図である。
【図９】図８に示すガス絶縁開閉装置を左側から見たガスブッシング近傍の構成を示す側面図である。
【図１０】本発明の実施例４に係るガス絶縁開閉装置のガスブッシング近傍の構成を示す平面図である。
【図１１】本発明の実施例５に係るガス絶縁開閉装置のガスブッシング近傍の構成を示す正面図である。
【符号の説明】
１…ガスブッシング、２…ブッシング下部タンク、３…タンク形避雷器、４…巻線形または光変換形の変成器、５、１３…ガス絶縁母線、６…カバー、７…断路器、８…変流器、９…遮断器、１０…主母線、１１…人、１２…送電線用接地開閉器、２０…接地シールド。BACKGROUND OF THE INVENTION
The present invention relates to a gas insulated switchgear.
[Prior art]
Usually, a gas insulated switchgear is configured by housing various devices such as switchgear in a metal case tank filled with an insulating gas and grounding the tank. Gas bushings are used on the way from overhead lines to switchgear and other devices, but when the gas bushing is mounted at a low position and close to the ground surface, a high electric field is generated near the ground surface, adversely affecting nearby people and objects. Can be considered. Therefore, conventionally, a device has been devised such as attaching a grounding shield for controlling the electric field to the outer periphery of the lower part of the bushing or increasing the attachment position of the gas bushing.
[Problems to be solved by the invention]
However, providing a ground shield is not preferable because it increases the cost of the gas-insulated switchgear, and if the mounting position of the gas bushing is increased, the gas bushing becomes higher and the gas-insulated switchgear is downsized and lowered. It was a problem.
Typical object of the present invention, in view of the above problems, while low-rise the gas bushing, also without providing a ground shield or the like for electric field control, gas insulated with reduced ground surface field strength in the vicinity It is to provide a switchgear.
Another representative object of the present invention is to reduce the burden on workers.
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a gas insulated switchgear having a gas bushing at a power inlet or a power outlet, wherein a bushing lower tank provided at a lower portion of the gas bushing is provided with a central axis of the bushing. substantially perpendicular direction against, as the electric field intensity at the height of the ground one meter does not exceed 100 V / cm, 3 three (or four) is to install a branch tank.
In addition, each of the branch tanks is radially extended from the central axis of the gas bushing in the same plane at every 120 ° in the case of three and every 90 ° in the case of four. The tank is installed at a predetermined height or higher with respect to the ground plane. In addition, there are tank type arresters, transformers, gas insulated buses, covers and grounding switch for power transmission lines as branch tanks, but the combinations are tank type arresters, transformers, gas insulated buses, and Cover or ground arrester for tank type arrester, transformer, gas insulated bus, and transmission line, or tank type arrester, transformer, gas insulated bus, and gas insulated bus branched in the direction different from the gas insulated bus There is a tank.
【The invention's effect】
According to the present invention, since the ground potential becomes each tank branched from the bushing lower tank, the electric field in the vicinity of the ground surface in the vicinity of the gas bushing can be reduced, and adverse effects on people and objects can be eliminated. Further, the bushing lower shield, which has been conventionally required, can be omitted, and the gas bushing mounting position can be lowered.
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the best mode for carrying out the present invention will be described with reference to specific examples.
[Example 1]
Figure 1 is a front view showing the configuration of a gas insulated switchgear according to the present embodiment, FIG. 2 is a plan view showing the configuration of a vicinity of a gas bushing shown in FIG. 1, FIG. 3 shows the configuration of a gas bushing vicinity shown in FIG. 1 It is a side view.
As shown in FIG. 1, this gas insulated switchgear includes a gas bushing 1, a bushing lower tank 2, a tank type lightning arrester 3, a winding type or light conversion type transformer 4, a gas insulated bus 5, a cover 6, and a disconnector 7. , Current transformer 8, circuit breaker 9, main bus 10 and the like. The gas bushing 1 is formed of an insulator on the outside, and a central shaft portion is formed of a conductor. The electric power from the overhead wire is transmitted from the lead-in line portion at the top of the gas bushing 1 to the bushing lower tank 2 through the conductor at the central shaft portion of the insulator. The bushing lower tank 2, the tank type lightning arrester 3, the winding type or light conversion type transformer 4, the gas insulated bus 5, the cover 6, the disconnector 7, the current transformer 8, the circuit breaker 9, and the main bus 10 are insulated. A metal case (hereinafter abbreviated as “tank”) filled with a property gas is housed in a variety of devices such as an open / close device, and the tank is grounded.
Further, as shown in FIGS. 1 to 3, the bushing lower tank 2 of the gas bushing 1 has branch portions in directions substantially perpendicular to the central axis of the gas bushing 1 and in four directions.
As shown in FIG. 2, each branch part is provided at an interval of approximately 90 °, as shown in FIG. The tanks of the gas insulation bus 5 and the cover 6 are connected.
The electric power guided to the bushing lower tank 2 is guided to the disconnector 7, the transformer 8 , and the main bus 10 through the gas insulation bus 5. Further, the electric power guided from the overhead wire is guided to the tank type lightning arrester 3 from the bushing lower tank 2. The tank-type lightning arrester 3 is normally high resistance, but has a low resistance in an emergency such as when there is a lightning strike on the overhead wire, and plays the role of lightning protection. The winding type or optical conversion type transformer 4 is installed for the purpose of measuring the voltage of the overhead wire. The cover 6 is not used for specific applications such as lightning protection or measurement, but is installed to reduce the electric field distribution near the gas bushing 1 , which will be described later.
Thus, according to the gas insulated switchgear of the present embodiment, the tank type arrester 3 branched from the bushing bottom tank 2, transformer 4, a gas insulated bus 5, and since the tanks of the cover 6 to the ground potential, As shown in FIG. 3, the electric field distribution in the vicinity of the gas bushing 1 reaches the upper level of each tank of the tank-type lightning arrester 3, the transformer 4, the gas insulation bus 5 and the cover 6 branched from the bushing lower tank 2. The electric field in the vicinity of the grounding surface in the vicinity of the bushing can be reduced, and adverse effects on the person 11 and objects can be eliminated.
The height of the branch from the bushing lower tank 2 to the tank-type lightning arrester 3 and the transformer 4 and the branch to the gas-insulated bus 5 and the cover 6 are slightly different depending on the manufacturing restrictions of the tank 2. Branching at the same height makes the electric field distribution in the vicinity of the ground plane more uniform, resulting in a better effect. In addition, in order to obtain the effect of the present invention, each tank connected to each branch portion needs to be installed at a position higher than at least the height of the human back. As a result, it is possible to avoid affecting people and objects in the vicinity of the gas bushing.
In addition, regarding the installation of the tank type lightning arrester 3, the transformer 4, the gas insulation reference line 5, and the cover 6 branched from the bushing lower tank 2, the electric field strength at a height of 1 meter above the ground exceeds 100 V / cm. there is no way Ru provided. Further, the protruding length of the cover 6 is not less than 2.5 meters when the rated voltage is at least 550 k V, 1.5 meters if not come larger than smaller than 300 k V rated voltage 550 k V above, and the it is desirable in the case of more than 160 kV smaller than the rated voltage is 300 k V is at least 1.0 meters.
[Example 2]
Figure 4 is a front view showing the configuration of the gas bushing near the gas insulated switchgear according to the present embodiment, FIG. 5 is a plan view showing the configuration of a vicinity of a gas bushing shown in FIG. 4, near the gas bushing 6 shown in FIG. 4 It is a side view which shows the structure.
In these drawings, reference numeral 12 denotes a power line grounding switch connected to the branching portion of the bushing lower tank 2, and the other configurations correspond to the configurations of the same symbols shown in FIGS.
Gas insulated switchgear apparatus of this embodiment, in place of the cover 6 of Example 1, is obtained by connecting a for transmission line grounding switch 12, as in Example 1, is branched from the bushing lower tank 2 Since each tank of the tank type lightning arrester 3, the transformer 4, the gas insulation bus 5, and the transmission line grounding switch 12 becomes a ground potential, the electric field distribution in the vicinity of the gas bushing 1 is a tank branched from the bushing lower tank 2. The lightning arrester 3, the transformer 4, the gas insulated bus 5, and the power transmission line grounding switch 2 reach the top of each tank, and the electric field near the ground plane near the gas bushing can be lowered.
[Example 3]
Figure 7 is seen a front view showing the configuration of a gas bushing near the gas insulated switchgear according to the present embodiment, FIG. 8 is a plan view showing the configuration of a vicinity of a gas bushing 7, 9 to FIG. 8 from the left It is a side view which shows the structure of gas bushing vicinity.
In these drawings, reference numeral 13 denotes a gas insulated bus connected to the branch portion of the bushing lower tank 2, and the other configurations correspond to the configurations of the same symbols shown in FIGS.
Gas insulated switchgear apparatus of this embodiment, in place of the cover 6 of the implementation example 1, is obtained by connecting a gas insulated bus 13, as in the implementation example 1, a tank that branches from the bushing lower tank 2 Since each tank of the lightning arrester 3, the transformer 4, and the gas insulation buses 5, 13 is at ground potential, the electric field distribution in the vicinity of the gas bushing 1 is divided into the tank type lightning arrester 3, the transformer 4, branched from the bushing lower tank 2, The electric field in the vicinity of the grounding surface in the vicinity of the gas bushing can be lowered by reaching the upper part of each tank of the gas insulation buses 5 and 13.
[Example 4]
Figure 10 folds flat sectional view showing the configuration of a gas bushing near the gas insulated switchgear according to the present embodiment. In this figure, a tank type lightning arrester 3, a winding type or light conversion type transformer 4, and a gas insulated bus 5 are provided at equal intervals of 20 degrees, respectively. Other configurations correspond to the configurations of the same reference numerals shown in FIGS.
Real Example 1 is a tank type arrester 3, wound or light conversion type of transformer 4, whereas is composed of four tanks gas insulated bus 5 and the cover 6, the gas insulated in this embodiment The switchgear can be composed of three tanks: a tank type lightning arrester 3 , a winding type or light conversion type transformer 4 , and a gas insulated bus 5 , and more easily lowers the electric field near the installation surface near the gas bushing. be able to. Even if the interval between the tanks is not 120 ° , if any of them is larger than 90 ° , the electric field near the installation surface in the vicinity of the gas bushing can be lowered.
[Example 5]
Figure 11 is a front elevation view showing a configuration of a gas bushing near the gas insulated switchgear according to the present embodiment. In this figure, instead of the cover 6, a ground shield 20 for controlling the boundary is branched from the bushing lower tank 2. Other configurations correspond to the configurations of the same reference numerals shown in FIGS.
Example 1 . Tank type arrester 3, wound or light conversion type of transformer 4, in addition to the gas-insulated bus 5, although branches the cover 6 from the bushing lower tank 2, gas-insulated switchgear apparatus of this embodiment, the electric field control The grounding shield 20 can reduce the electric field in the vicinity of the installation surface in the vicinity of the gas bushing, and can be realized with a simpler structure.
[Brief description of the drawings]
[1] Ru front view showing the configuration of a gas insulated switchgear according to Embodiment 1 of the present invention.
[Figure 2] Ru plan view showing the configuration of the gas bushing near the gas-insulated switchgear apparatus shown in FIG.
[Figure 3] Ru side view showing a gas bushing near the configuration of the gas insulated switchgear shown in FIG.
[4] Ru front view showing a gas bushing near the configuration of the gas insulated switchgear according to Embodiment 2 of the present invention.
[5] Ru plan view showing the configuration of the gas bushing near the gas-insulated switchgear apparatus shown in FIG.
[6] Ru side view showing a gas bushing near the configuration of the gas insulated switchgear shown in FIG.
[7] Ru front view showing a gas bushing near the configuration of the gas insulated switchgear according to Embodiment 3 of the present invention.
[8] Ru plan view showing a gas bushing near the configuration of the gas insulated switchgear shown in FIG.
[9] Ru side view showing a gas bushing configuration near viewed gas insulated switchgear shown in FIG. 8 from the left side.
[10] Ru flat surface diagram illustrating a gas bushing vicinity configuration of Example 4 Gas insulated switchgear according to the present invention.
11 is a positive plane view showing a configuration of a gas bushing near the gas insulated switchgear according to Embodiment 5 of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Gas bushing, 2 ... Bushing lower tank, 3 ... Tank type lightning arrester, 4 ... Winding type or light conversion type transformer, 5, 13 ... Gas insulation bus, 6 ... Cover, 7 ... Disconnector, 8 ... Current transformation 9 ... Circuit breaker, 10 ... Main bus, 11 ... Person, 12 ... Ground switch for power transmission line, 20 ... Ground shield.

Claims (7)

電力引込口または電力引出口に、ガスブッシングを備えるガス絶縁開閉装置において、
前記ガスブッシングの下部に設けられるブッシング下部タンクに、当該ブッシングの中心軸に対してほぼ直角方向に、地上１メートルの高さにおける電界強度が１００Ｖ／ｃｍを越えないように、４つの分岐タンクが設置されていることを特徴とするガス絶縁開閉装置。In a gas insulated switchgear provided with a gas bushing at the power inlet or the power outlet,
The bushing lower tank provided at a lower portion of the gas bushing, in a direction substantially perpendicular to the central axis of the bushing, as the electric field intensity at the height of the ground one meter does not exceed 100 V / cm, 4 one branch tanks A gas insulated switchgear characterized in that is installed. 請求項１において、前記４つの分岐タンクは、同一平面内で前記ガスブッシングの中心軸から９０°毎に放射状に伸びて設置されていることを特徴とするガス絶縁開閉装置。2. The gas insulated switchgear according to claim 1, wherein the four branch tanks are installed to extend radially every 90 ° from the central axis of the gas bushing in the same plane . 請求項１において、前記分岐タンクが、タンク形避雷器、変成器、ガス絶縁母線、及びカバーの各タンクから構成されていることを特徴とするガス絶縁開閉装置。  2. The gas insulated switchgear according to claim 1, wherein the branch tank is composed of a tank type lightning arrester, a transformer, a gas insulated bus, and a cover tank. 請求項１において、前記分岐タンクが、タンク形避雷器、変成器、ガス絶縁母線、及び送電線用接地開閉器の各タンクから構成されていることを特徴とするガス絶縁開閉装置。  2. The gas insulated switchgear according to claim 1, wherein the branch tank is composed of tanks of a tank type lightning arrester, a transformer, a gas insulated bus, and a ground switch for power transmission lines. 請求項２において、前記分岐タンクが、タンク形避雷器、変成器、ガス絶縁母線及び該ガス絶縁母線と異なる方向に分岐されるガス絶縁母線の各タンクから構成されていることを特徴とするガス絶縁開閉装置。  3. The gas insulation according to claim 2, wherein the branch tank is composed of a tank type lightning arrester, a transformer, a gas insulated bus, and a tank of a gas insulated bus that branches in a direction different from the gas insulated bus. Switchgear. 電力引込口または電力引出口に、ガスブッシングを備えるガス絶縁開閉装置において、
前記ガスブッシングの下部に設けられるブッシング下部タンクに、当該ブッシングの中心軸に対してほぼ直角方向に、地上１メートルの高さにおける電界強度が１００Ｖ／ｃｍを越えないように、３つの分岐タンクが設置されていることを特徴とするガス絶縁開閉装置。In a gas insulated switchgear provided with a gas bushing at the power inlet or the power outlet,
Three branch tanks are provided in the lower tank of the bushing provided at the lower part of the gas bushing so that the electric field strength at a height of 1 meter above the ground does not exceed 100 V / cm in a direction substantially perpendicular to the central axis of the bushing. A gas insulated switchgear characterized by being installed. 請求項６において、前記３つ分岐タンクは、同一平面内で前記ガスブッシングの中心軸から１２０°毎に放射状に伸びていることを特徴とするガス絶縁開閉装置。  7. The gas insulated switchgear according to claim 6, wherein the three branch tanks extend radially from the central axis of the gas bushing every 120 ° in the same plane.
JP2001564429A 2000-02-28 2001-02-16 Gas insulated switchgear Expired - Fee Related JP3876356B2 (en)

Applications Claiming Priority (2)

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JP2000052033 2000-02-28
PCT/JP2001/001143 WO2001065652A1 (en) 2000-02-28 2001-02-16 Bushing and gas-insulated switch

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015220831A (en) * 2014-05-16 2015-12-07 株式会社日立製作所 Electric power circuit breaker

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Publication number Priority date Publication date Assignee Title
FR2111871A1 (en) * 1970-10-28 1972-06-09 Rhein Westfael Elect Werk Ag
JPH0742174Y2 (en) * 1988-01-12 1995-09-27 株式会社東芝 Gas insulated switchgear
JPH07123547A (en) * 1993-10-25 1995-05-12 Toshiba Corp Gas insulated switchgear
JPH1051913A (en) * 1996-08-01 1998-02-20 Hitachi Ltd Gas insulated composite switchgear
JPH10112906A (en) * 1996-10-02 1998-04-28 Toshiba Corp Gas insulation switchgear
JPH10210613A (en) * 1997-01-21 1998-08-07 Hitachi Ltd Composite gas insulation switchgear

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015220831A (en) * 2014-05-16 2015-12-07 株式会社日立製作所 Electric power circuit breaker

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