JPH0386009A - Gas insulation switchgear - Google Patents
Gas insulation switchgearInfo
- Publication number
- JPH0386009A JPH0386009A JP1223430A JP22343089A JPH0386009A JP H0386009 A JPH0386009 A JP H0386009A JP 1223430 A JP1223430 A JP 1223430A JP 22343089 A JP22343089 A JP 22343089A JP H0386009 A JPH0386009 A JP H0386009A
- Authority
- JP
- Japan
- Prior art keywords
- gis
- switchgear
- ground
- circuit
- lightning arrester
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000009413 insulation Methods 0.000 title description 3
- 239000002184 metal Substances 0.000 claims description 5
- 229910052751 metal Inorganic materials 0.000 claims description 5
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 16
- 239000004020 conductor Substances 0.000 description 12
- 239000011787 zinc oxide Substances 0.000 description 8
- 238000009434 installation Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 229910018503 SF6 Inorganic materials 0.000 description 3
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000005684 electric field Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 229960000909 sulfur hexafluoride Drugs 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Gas-Insulated Switchgears (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は主回路、避雷器等の充電部がガスで満された
金属容器で覆われて構成されたガス絶縁開閉装置(以下
GISという)の改良に関するものである。[Detailed Description of the Invention] [Field of Industrial Application] This invention relates to a gas insulated switchgear (hereinafter referred to as GIS) in which live parts such as a main circuit and a lightning arrester are covered with a metal container filled with gas. It is about improvement.
第4図は従来の500kV GISの構成の一部を示す
部分断面図、第5図は従来のGISの単線結線図であり
、第4図は第5図の一点鎖線Aよりも右側の機器のみを
図示している。これらの図において、(1)は地面、(
2)は外部接続用のブッシング、(3)は接続用の導体
、(4)は導体(3)を収容した金属製の筒、(5)は
内部構成を図示していないが動力操作の断路器(6)と
動力操作の接地開閉器(7)と手動操作の接地開閉器(
8〉(第5図参照)とを収容した断路部、(9)は変流
器、OOは遮断器(の一部)、(ロ)は後で詳細構成を
述べる酸化亜鉛形の避雷器であり、いずれも優れた絶縁
ガス媒体である六弗化硫黄ガス(以下SF6ガスと称す
)で満され接地された金属容器によりその充電部が覆わ
れている。避雷器(ロ)は開閉手段である動力操作の切
り離し新路器(2)を介して導体(3)と大地との間に
接続されている。(至)〜[相]は夫々断路部(5)、
ブッシング(2)、切り離し断路器(6)、避雷器(ロ
)の封入ガス(SF6ガス)を区分するとともに充電部
を支持する絶縁スペーサ、QQ〜α時はブッシング(2
)、断路部(5)、遮断器(9)及び切り離し断路器(
6)の架台である。なお、第4図では図示していないが
、第5図の一点鎖線Aよりも左側に示された変流器(1
)、母線用断路器(2)、@、母線(2)。Figure 4 is a partial cross-sectional view showing part of the configuration of a conventional 500kV GIS, Figure 5 is a single line diagram of the conventional GIS, and Figure 4 shows only the equipment on the right side of the dashed-dotted line A in Figure 5. is illustrated. In these figures, (1) is the ground, (
2) is a bushing for external connection, (3) is a conductor for connection, (4) is a metal cylinder containing conductor (3), and (5) is a disconnection for power operation, although the internal structure is not shown. (6), a power-operated earthing switch (7), and a manually operated earthing switch (
8〉 (see Figure 5), (9) is a current transformer, OO is (a part of) a circuit breaker, and (B) is a zinc oxide type lightning arrester whose detailed configuration will be described later. In both cases, the live parts are covered by a grounded metal container filled with sulfur hexafluoride gas (hereinafter referred to as SF6 gas), which is an excellent insulating gas medium. The lightning arrester (b) is connected between the conductor (3) and the ground via a power-operated disconnector (2) which is an opening/closing means. (to) to [phase] are respectively the disconnection part (5),
Bushing (2), disconnector (6), insulating spacer that separates the gas (SF6 gas) filled in the lightning arrester (b) and supports the live parts, bushing (2) for QQ~α
), disconnector (5), circuit breaker (9) and disconnector (
6). Although not shown in FIG. 4, the current transformer (1) shown to the left of the dashed line A in FIG.
), Busbar disconnector (2), @, Busbar (2).
(財)、接地開閉器(至)を含めてGISが構成されて
いる。(Incorporated Foundation), GIS is configured including the earthing switch (To).
次に、避雷器(ロ)の構成について説明する。第4図に
おいて、避雷器0は接地された金属容器であるケース(
ロ)を有し、このケース(ロ)に酸化亜鉛を主成分とし
た焼結体である酸化亜鉛素子(至)が1段に3個ずつ正
三角形に配設されたものがシールド(至)と交互に多数
段積み重ねられて収容され(構造は同様であるので発明
の一実施例を示す第3図参照l下端部が接地される(第
4図)とともに上端部が切り離し断路器(6)に接続さ
れている。(財)は電界分布を均一化する分圧遮蔽部材
、(2)は酸化亜鉛素子(2)とシールドに)との積み
重ねられたものを押えている押え部材である。Next, the configuration of the lightning arrester (b) will be explained. In Figure 4, lightning arrester 0 is a case (
The case (b) has zinc oxide elements (to), which are sintered bodies mainly composed of zinc oxide, arranged in an equilateral triangle, three in each stage, as a shield (to). The lower end is grounded (Fig. 4) and the upper end is disconnected (disconnector 6). (2) is a partial pressure shielding member that equalizes the electric field distribution, and (2) is a holding member that holds down the stacked zinc oxide element (2) and the shield.
上記のように構成されたGISの機能については周知で
あるので説明を省略して、切り離し断路器Oについて説
明する。500kV級のGISは、輸送可能な大きさの
ユニットに分割されて製作され、所定の据付場所、この
例では開閉所へ輸送されて全体組み立てが行なわれる。Since the functions of the GIS configured as described above are well known, the explanation thereof will be omitted, and the disconnector O will be explained. A 500 kV class GIS is manufactured by being divided into transportable-sized units, transported to a predetermined installation site, in this example a switchyard, and then assembled as a whole.
組み立て後、主回路を構成するブッシング(2)、導体
(8)、断路器(6)等の電路に所定の試験電圧、この
実施例では1.25Eボルト(E:常規対地電圧、以下
同じ)を10分間印加して絶縁耐力試験が行なわれる。After assembly, the bushing (2), conductor (8), disconnector (6), etc. that make up the main circuit are connected to a predetermined test voltage, in this example 1.25E volts (E: normal ground voltage, the same applies hereinafter). A dielectric strength test is carried out by applying the following for 10 minutes.
この絶縁耐力試験の際、切りaし断路器@を開放して避
電器QCに試験電圧1.25Eボルトによる過電流が流
れないように回路を解放する。これは機器の保護協調上
、避雷器(ロ)には極めて低い制限電圧が要求されてい
るので上記のような試@電圧の印加によっても過電流が
流れて発熱による酸化亜鉛素子(至)の損傷のおそれが
あり、又過電流を供給するために大きな容量の試験用変
圧器が必要になる等の問題があるので、これを防ぐため
である。GISでなく普通の開閉装置ならば、切り離し
断路器0を用いずに一時的に主回路と避雷器Ql)との
接続を外すことにより主回路との切り離しを容易に行え
るが、GISの場合はこれらの機器の充電部は、ガスで
満された金属容器で覆われていて不可能であるので、切
り離し断路器(6)を操作して回路を解放する等の方法
によっている。During this dielectric strength test, the disconnector @ is opened to open the circuit so that overcurrent due to the test voltage of 1.25 E volts does not flow through the earth arrester QC. This is because lightning arresters (b) are required to have an extremely low limiting voltage in order to protect the equipment, so even if the above test voltage is applied, an overcurrent will flow and damage the zinc oxide element (b) due to heat generation. This is to prevent problems such as the risk of overcurrent and the need for a large-capacity test transformer to supply overcurrent. If it is an ordinary switchgear rather than a GIS, it is easy to disconnect the main circuit by temporarily disconnecting the main circuit from the lightning arrester Ql) without using a disconnector 0, but in the case of a GIS, these Since the live parts of the equipment are covered with metal containers filled with gas, it is impossible to do so, so we resort to methods such as operating the disconnector (6) to open the circuit.
なお、絶縁耐力試験時等における過電圧印加に々
よる過電鍾駕熱による損傷のおそれなどの問題は上記避
雷器0だけに限られず、巻線形計器用ガス変圧器、コン
デンサ形計器用変圧器等、主回路と大地との間に接続さ
れて受動的に動作するインピーダンス機器について共通
に存在する。In addition, problems such as the risk of damage due to overheating due to overvoltage applied during dielectric strength tests are not limited to the above-mentioned lightning arrester 0, but can also be applied to wound type instrument gas transformers, capacitor type instrument transformers, etc. Commonly found in impedance devices that are connected between the main circuit and ground and operate passively.
従来のGISは以上のように構成され、据付場所におい
て行なわれる主回路の絶縁耐力試験の際に避雷器0に過
電圧が印加されて過電流が流れるのを防止するために切
り離し断路器0を主回翳■つまり電路側に設けて回路を
解放するようにしており、切り離し断路器0は500k
V回路用のものとしjfければならず、従って耐電圧2
.36Eボルトを要求されるので、大きさも大きく製作
費がかさみ、GISの設置スペースが大きくなるという
問題点があった。The conventional GIS is configured as described above, and in order to prevent overvoltage from being applied to lightning arrester 0 and overcurrent flowing during a dielectric strength test of the main circuit conducted at the installation site, disconnector 0 is used to prevent overcurrent from flowing into the main circuit. In other words, it is installed on the electric line side to release the circuit, and the disconnector 0 is 500k
It must be for V circuit, therefore withstand voltage 2
.. Since 36E bolts are required, there are problems in that the size is large, the manufacturing cost increases, and the installation space for the GIS increases.
この発明は上記のような問題点を解消するためになされ
たもので、GISの電路の絶縁耐力試験時等において避
雷器等のインピーダンス機器の回路を一時的に開放する
ための小形で安価な開閉手段を備え、設置スペースの小
さいGISを得ることを目的とする。This invention was made to solve the above-mentioned problems, and provides a small and inexpensive switching means for temporarily opening the circuit of an impedance device such as a lightning arrester during a dielectric strength test of a GIS electrical circuit. The objective is to obtain a GIS with a small installation space.
この発明に係るGISは、主回路と大地とに接続された
避雷器等のインピーダンス機器の大地側に開閉手段を設
けたものである。The GIS according to the present invention is provided with a switching means on the ground side of an impedance device such as a lightning arrester connected between a main circuit and the ground.
この発明においては、GISの絶縁耐力試験を行う場合
等に主回路と大地との間に接続された避雷器等のインピ
ーダンス機器に過電圧による過電流が流れるのを防止す
るためインピーダンス機器を含む回路を開放して過電流
が流れないようにするためなど一時的に回路を解放する
開閉手段をインピーダンス機器の大地側(接地側)に設
けるようにしたので、インピーダンス機器の主回路側に
設けられていた従来の開閉手段に比し耐電圧強度を大幅
に低減できるので、開閉手段を小形、安価なものにでき
る。In this invention, when performing a dielectric strength test of GIS, etc., the circuit including the impedance device is opened to prevent overcurrent from flowing through the impedance device such as a lightning arrester connected between the main circuit and the ground due to overvoltage. In order to prevent overcurrent from flowing, a switching means for temporarily opening the circuit is provided on the earth side of the impedance device. Since the withstand voltage strength can be significantly reduced compared to the opening/closing means, the opening/closing means can be made smaller and cheaper.
第1図〜第3図はこの発明の一実施例を示すもので、避
雷器(財)の接地側に開閉手段として切り離し装置(6
)を設けたものであり、第1図は500kV GISの
構成の一部を示す部分断面図、第2図はGISの単線結
線図、第3図は避雷器の切り離し装置(6)部の詳細及
び動作を示す断面図である。これらの図において、(財
)は酸化亜鉛形の避雷器であり、導体(3)と大地と1
姦i大地側に設けられた切り離し装置0を介して接続さ
れている。切り離し装置部はケースのフランジ(31a
)に支持されケース0])内に収容された絶縁支持台6
]J1この絶縁支持台値υに支持され酸化亜鉛素子(至
)が載置された端子板口、端子板1112に設けられた
接触子−、同じくシールド(53a欠フランジ(31a
)に設けられた摺動接触子(財)、同じくシールド(5
4a)、摺動接触子−と摺動しながら上下方向に往復運
動をし接触子−と接離する棒状の切り離し導体−1切り
離し導体■のフランジ部(55a)と係合して切り離し
導体■を上下に案内するねじ付のガイドボルドー、固定
用ナツト口及び切り離し導体−とフランジ(31a)と
の摺動部を封止するOリング−により構成され第3図(
a)は切り離し導体■と接触子−を開離した状態1(b
)図は接触させた状態を示している。なお、図示してな
いカ、絶縁支持台11はケースのフランジ(31a)に
1端子板姉は絶縁支持台−にボルトで固定されている。Figures 1 to 3 show an embodiment of the present invention, in which a disconnection device (6
), Fig. 1 is a partial cross-sectional view showing a part of the configuration of the 500kV GIS, Fig. 2 is a single line diagram of the GIS, and Fig. 3 is a detailed view of the arrester disconnection device (6). It is a sectional view showing operation. In these diagrams, the company is a zinc oxide type lightning arrester, and the conductor (3), the ground, and the
The connection is made via a disconnection device 0 provided on the ground side. The disconnection device part is attached to the flange (31a) of the case.
) and housed in the case 0])
]J1 The terminal board opening on which the zinc oxide element (to) is supported by the insulation support value υ, the contact provided on the terminal board 1112, and the shield (53a missing flange (31a)
), the sliding contactor (goods) installed on the shield (5
4a), A rod-shaped disconnection conductor-1 that reciprocates in the vertical direction while sliding with the sliding contact and comes into contact with and separates from the contact 1 Engages with the flange portion (55a) of the disconnection conductor ■ It consists of a threaded guide Bordeaux that guides it up and down, a fixing nut opening, and an O-ring that seals the sliding part between the disconnecting conductor and the flange (31a).
a) is the state 1 (b) in which the disconnection conductor ■ and the contact
) The figure shows the state in which they are in contact. Incidentally, the insulating support 11 (not shown) is fixed to the flange (31a) of the case, and the one terminal plate is fixed to the insulating support with bolts.
なお、接触子−と切り離し導体−とが開離されたとき、
両者の絶縁即ち切り離し装置(6)の耐電圧強度は据付
場所において行なわれる電路の絶縁耐力試験の電圧、こ
の場合1.25Eボルトに耐えるようにされていれば充
分であり、第4図に示された従来の切り離し断路器Oに
要求される耐電圧2.36Eボルトに比し大幅に低い耐
電圧強度で足りる。In addition, when the contactor and the disconnecting conductor are separated,
The voltage strength of the insulation or disconnection device (6) between the two is sufficient if it can withstand the voltage of the dielectric strength test of the electrical circuit conducted at the installation site, in this case 1.25 E volts, as shown in Figure 4. Compared to the withstand voltage of 2.36 E volts required for the conventional disconnecting and disconnecting switch O, a withstand voltage strength that is significantly lower is sufficient.
次に、切り離し装置−の操作について述べる。Next, the operation of the separating device will be described.
GISの据付場所において絶縁耐力試験を行う場合、切
り離し導体−を図の下方へ押し下げて接触子−との間を
開離させて第3図(a)の状態にして大地との間を開放
してから試験電圧1.25Eボルトを印加する。この場
合、避雷器0の酸化亜鉛素子(2)、シールド(至)、
端子板−,接触子−等には試験電圧1.25Eボルトが
印加されるが避雷器(ロ)と大地との間は開放されてい
るので、電流は流れない。又、常時は第3図(b)のよ
うに切り離し導体■と接触子−とを接続させて端子板図
を接地した状態となるようナツト団により固定されてい
る。When performing a dielectric strength test at the location where the GIS is installed, press the disconnection conductor downwards in the figure to open the gap between it and the contactor, as shown in Figure 3 (a), and open the gap between it and the ground. Then apply a test voltage of 1.25 E volts. In this case, the zinc oxide element (2) of lightning arrester 0, the shield (to),
A test voltage of 1.25 E volts is applied to the terminal plate, contacts, etc., but since the lightning arrester (b) and the ground are open, no current flows. Also, as shown in FIG. 3(b), the disconnecting conductor (1) and the contactor (-) are normally connected and the terminal board is fixed by a nut group so that it is in a grounded state.
なお、上記実施例ではインピーダンス機器の例として避
雷器の場合を示したが、電路と大地との間に接続されて
用いられる他の機器、例えば巻線形の計器用変圧器、コ
ンデンサ形計器変圧器等のインピーダンス機器であって
も同様の効果を奏する。In the above embodiment, a lightning arrester is used as an example of the impedance device, but other devices connected between the electric line and the ground, such as a winding type voltage transformer, a capacitor type voltage transformer, etc. Similar effects can be achieved even with impedance devices.
又、大地側に設けられた開閉手段である切り離し装R−
を一時的に開放する場合の例として、電路の絶縁耐力試
験を行う場合について述べたが、この発明の趣旨を損な
わない範囲において他の場合であっても良く、切り離し
装置(6)の耐電圧強度はそれに必要とされる値に合せ
て適宜設計すれば良い。In addition, the disconnection R- which is the opening/closing means provided on the ground side
As an example of temporarily opening the disconnection device (6), we have described the case of conducting a dielectric strength test of the electric circuit, but other cases may be used without detracting from the spirit of the present invention. The strength may be appropriately designed according to the required value.
以上のようにこの発明によれば、避雷器等のインピーダ
ンス機器の大地側に開閉手段を設けたので、従来の電路
側に設けるものに比して大幅に耐電圧強度を低減できる
ので、極めて小形かつ安価な開閉手段とすることができ
、据付スペースの小さいGISを得ることができる。As described above, according to the present invention, since the switching means is provided on the ground side of impedance devices such as lightning arresters, the withstand voltage strength can be significantly reduced compared to conventional devices provided on the electrical line side. An inexpensive opening/closing means can be used, and a GIS with a small installation space can be obtained.
第1図〜第3図はこの発明の一実施例を示すものであり
、第1図は500kV GISの構成の一部を示す部分
断面図、第2図はGISの単線結線図、第3図は避雷器
の切り離し装置部の詳細及び動作を示す断面図、第4図
、第5回は従来のGISを示すもので第4図はGISの
構成の一部を示す部分断面図、第5図は単線結線図であ
る。
図において、(2)はブッシング、(3)は導体、0υ
は避M器、(6)は切り離し装置である。
なお、各図中同一符号は同−又は相当部分を示す。Figures 1 to 3 show one embodiment of the present invention, with Figure 1 being a partial sectional view showing part of the configuration of a 500kV GIS, Figure 2 being a single line diagram of the GIS, and Figure 3 Figure 4 is a cross-sectional view showing the details and operation of the lightning arrester disconnection device, Figures 4 and 5 are conventional GIS, and Figure 4 is a partial cross-sectional view showing part of the GIS configuration. It is a single line diagram. In the figure, (2) is a bushing, (3) is a conductor, 0υ
(6) is the escape device, and (6) is the disconnection device. Note that the same reference numerals in each figure indicate the same or corresponding parts.
Claims (1)
インピーダンス機器を備えこれらの充電部がガスで満さ
れ接地された金属容器で覆われたガス絶縁開閉装置にお
いて、上記インピーダンス機器は開閉手段を介して大地
に接続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, which includes a main circuit and an impedance device such as a lightning arrester connected to the main circuit and the ground, and whose live parts are covered with a metal container filled with gas and grounded, the impedance device is a switching means. A gas-insulated switchgear characterized in that it is connected to the earth via a
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1223430A JPH0386009A (en) | 1989-08-30 | 1989-08-30 | Gas insulation switchgear |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1223430A JPH0386009A (en) | 1989-08-30 | 1989-08-30 | Gas insulation switchgear |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH0386009A true JPH0386009A (en) | 1991-04-11 |
Family
ID=16798023
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1223430A Pending JPH0386009A (en) | 1989-08-30 | 1989-08-30 | Gas insulation switchgear |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0386009A (en) |
-
1989
- 1989-08-30 JP JP1223430A patent/JPH0386009A/en active Pending
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