JPH0721983B2 - Circuit switchgear - Google Patents

Circuit switchgear

Info

Publication number
JPH0721983B2
JPH0721983B2 JP31185787A JP31185787A JPH0721983B2 JP H0721983 B2 JPH0721983 B2 JP H0721983B2 JP 31185787 A JP31185787 A JP 31185787A JP 31185787 A JP31185787 A JP 31185787A JP H0721983 B2 JPH0721983 B2 JP H0721983B2
Authority
JP
Japan
Prior art keywords
shield
operating
opening
insulating
rod
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.)
Expired - Lifetime
Application number
JP31185787A
Other languages
Japanese (ja)
Other versions
JPH01154419A (en
Inventor
幹夫 山本
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP31185787A priority Critical patent/JPH0721983B2/en
Publication of JPH01154419A publication Critical patent/JPH01154419A/en
Publication of JPH0721983B2 publication Critical patent/JPH0721983B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02Details
    • H01H33/42Driving mechanisms
    • H01H2033/426Details concerning the connection of the isolating driving rod to a metallic part

Landscapes

  • High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
  • Circuit Breakers (AREA)

Description

【発明の詳細な説明】 [産業上の利用分野] この発明は、例えば電力用碍子形ガス遮断器などの回路
開閉装置に関し、特に絶縁操作ロッドの端部における開
閉部からの電界の電界強度を低下させるシールドを有す
る回路開閉装置に関するものである。
Description: TECHNICAL FIELD The present invention relates to a circuit switchgear such as an insulator type gas circuit breaker for electric power, and more particularly to a field switch of an electric field from an switchgear at an end of an insulating operating rod. The present invention relates to a circuit switchgear having a lowering shield.

[従来の技術] 第3図は従来の回路開閉装置の一例として、特開昭61−
290616号公報に示された電力用碍子形ガス遮断器の一部
切り欠き断面図であり、図において回路を開閉するため
の開閉部としての消弧部(図示せず)は消弧室碍管
(1)内に収納されており、この消弧室碍管(1)は消
弧部を動作させる操作部(図示せず)上に位置する支持
碍管(2)によって支持されている。この支持碍管
(2)はその上端部が消弧室碍管(1)の下端部にフラ
ンジ(3)と開閉部側フランジ(4)とを介して接続さ
れているとともに、その下端部が操作部側フランジ
(5)を介して操作部に接続されている。支持碍管
(2)の内部には操作部からの駆動力を開閉部に伝達す
る円筒状の絶縁操作ロッド(6)が設けられている。こ
の絶縁操作ロッド(6)の上端部にはフランジ(3)お
よび開閉部側フランジ(4)での電界強度を低下させる
ために先端部に曲率半径R1の丸みを有する上部シールド
(7)がピン(9)によって取り付けられている。絶縁
操作ロッド(6)の下端部には操作部側フランジ(5)
での電界強度を低下させるために下部シールド(8)が
ピン(9)によって取り付けられている。支持碍管
(2)の内部と消弧室碍管(1)の内部とには絶縁媒体
であるSF6ガスが封入されている。
[Prior Art] FIG. 3 shows an example of a conventional circuit opening / closing device.
FIG. 2 is a partially cutaway sectional view of an electric insulator type gas circuit breaker disclosed in Japanese Patent No. 290616, in which an arc extinguishing section (not shown) as an opening / closing section for opening / closing a circuit is an arc extinguishing chamber insulator tube ( 1), the arc-extinguishing chamber insulator tube (1) is supported by a supporting insulator tube (2) located on an operating section (not shown) for operating the arc-extinguishing section. The supporting porcelain bushing (2) has its upper end connected to the lower end of the arc-extinguishing chamber porcelain bushing (1) via a flange (3) and an opening / closing section side flange (4), and its lower end is an operating portion. It is connected to the operating part via a side flange (5). Inside the support insulator tube (2), a cylindrical insulating operation rod (6) for transmitting the driving force from the operation section to the opening / closing section is provided. An upper shield (7) having a roundness with a radius of curvature R 1 at its tip is provided at the upper end of the insulating operation rod (6) in order to reduce the electric field strength at the flange (3) and the opening / closing part side flange (4). It is attached by a pin (9). On the lower end of the insulated operating rod (6) is the operating side flange (5).
A lower shield (8) is attached by pins (9) to reduce the electric field strength at. SF 6 gas, which is an insulating medium, is enclosed in the support insulator (2) and the arc-extinguishing chamber insulator (1).

上記のように構成された従来の電力用碍子形ガス遮断器
においては、消弧部などの課電部に所定の電圧が印加さ
れた場合、絶縁操作ロッド(6),支持碍管(2)およ
びSF6ガスによって開閉部と操作部との間の絶縁がなさ
れる。また、支持碍管(2)の上端部周囲の電界は、図
中の破線に示す等電位線(A)のようになっている。こ
のように、上部シールド(7)によってフランジ(3)
および開閉部側フランジ(4)での電界強度は低下され
る。また、下部シールド(8)によって操作部側フラン
ジでの電界強度は低下される。
In the conventional porcelain insulator type gas circuit breaker configured as described above, when a predetermined voltage is applied to the power application part such as the arc extinguishing part, the insulating operation rod (6), the support porcelain tube (2) and The SF 6 gas insulates the switch and the operating part. The electric field around the upper end of the supporting porcelain bushing (2) is like an equipotential line (A) shown by the broken line in the figure. Thus, the upper shield (7) allows the flange (3) to
And the electric field strength at the opening / closing part side flange (4) is reduced. Further, the lower shield (8) reduces the electric field strength at the operation side flange.

[発明が解決しようとする問題点] 上記のように構成された従来の電力用碍子形ガス遮断器
においては、支持碍管(2)の上端部周囲の電界強度
が、緩和されてはいるものの、第3図の等電位線(A)
に示すように、上部シールド(7)の先端部の周囲で著
しく高くなってしまい、絶縁破壊を起こす恐れがあるの
で、これを避けるため上部シールド(7)の先端部の曲
率半径R1を大きくしなければならず、それにともなて絶
縁操作ロッド(6)の内径は大きくなってしまい、支持
碍管(2)も大形化してしまうので、全体に重量化する
とともに高価格化してしまうという問題点があった。ま
た、絶縁操作ロッド(6)の重量化にともない、絶縁操
作ロッド(6)の応答性が悪くなり、電力用碍子形ガス
遮断器に要求される高速度動作を得るための妨げになる
という問題点もあった。
[Problems to be Solved by the Invention] In the conventional power insulator gas circuit breaker configured as described above, although the electric field strength around the upper end of the supporting insulator tube (2) is relaxed, Equipotential line (A) in Fig. 3
As shown in Fig. 4, the radius of curvature R 1 at the tip of the upper shield (7) should be increased to avoid this, because it may become extremely high around the tip of the upper shield (7) and dielectric breakdown may occur. Since the inner diameter of the insulating operation rod (6) becomes large and the supporting porcelain insulator (2) also becomes large, the problem is that the overall weight and cost are increased. There was a point. In addition, as the weight of the insulation operating rod (6) becomes heavier, the responsiveness of the insulation operating rod (6) deteriorates, which hinders obtaining the high-speed operation required for an insulator gas circuit breaker for electric power. There were also points.

この発明は、上記のような問題点を解決するためになさ
れたもので、シールド先端部の電界強度を低下させ、耐
電圧性能を向上させることができるとともに、絶縁操作
ロッドを細くするとともに軽量化することによって、全
体の動作を高速度化し、かつ低価格化することができる
回路開閉装置を得ることを目的とする。
The present invention has been made to solve the above problems, and it is possible to reduce the electric field strength at the tip of the shield, improve the withstand voltage performance, and make the insulating operating rod thin and lightweight. By doing so, it is an object of the present invention to obtain a circuit switchgear capable of speeding up the whole operation and reducing the price.

[問題点を解決するための手段] この発明に係る回路開閉装置は、絶縁操作ロッドの端部
外周を被うようにして設けられた外部シールドと、絶縁
操作ロッド内に外部シールドの先端部よりも絶縁操作ロ
ッドの中心部方向へ突出して設けられた内部シールドと
からなるシールドを絶縁操作ロッドの端部に設けたもの
である。
[Means for Solving the Problems] A circuit switchgear according to the present invention includes an outer shield provided so as to cover an outer circumference of an end portion of an insulating operation rod, and a tip portion of the outer shield inside the insulating operation rod. Also, a shield including an inner shield protruding toward the center of the insulating operation rod is provided at the end of the insulating operation rod.

[作用] この発明においては、シールドを外部シールドと内部シ
ールドとに分けることによって、外部シールドと内部シ
ールドとが互いに周囲の電界強度を下げあい、シールド
の先端部における電界強度は低下する。
[Operation] In the present invention, by dividing the shield into the outer shield and the inner shield, the outer shield and the inner shield lower the electric field strength around each other, and the electric field strength at the tip portion of the shield lowers.

[実施例] 以下、この発明の実施例を図について説明する。第1図
はこの発明の一実施例を示す電力用碍子形ガス遮断器の
要部断面図、第2図は第1図の絶縁操作ロッドの上端部
を示す断面図であり、第3図と同一または相当部分は同
一符号を付し、その説明は省略する。
Embodiment An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view of an essential part of an insulator gas circuit breaker for electric power showing an embodiment of the present invention, and FIG. 2 is a sectional view showing an upper end portion of the insulating operation rod of FIG. 1, and FIG. The same or corresponding parts are designated by the same reference numerals, and the description thereof will be omitted.

図において、消弧部(図示せず)を有する消弧室碍管
(1)は従来例の支持碍管(2)より外径が細い支持碍
管(11)によって支持されており、この支持碍管(11)
は、その上端部がフランジ(4)および開閉部側フラン
ジ(12)を介して消弧室碍管(1)に接続され、その下
端部が操作部側フランジ(13)を介して操作部に接続さ
れている。
In the figure, an arc-extinguishing chamber porcelain tube (1) having an arc-extinguishing portion (not shown) is supported by a support porcelain tube (11) having an outer diameter smaller than that of a conventional support porcelain tube (2). )
Has its upper end connected to the arc-extinguishing chamber insulator pipe (1) via the flange (4) and the opening / closing part side flange (12), and its lower end connected to the operation part via the operation part side flange (13). Has been done.

支持碍管(11)の上端部の内部には消弧室碍管(1)か
ら出た第1の操作棒(14)が設けられており、支持碍管
(11)の下端部の内部には操作部から出た第2の操作棒
(15)が設けられている。これらの第1の操作棒(14)
および第2の操作棒(15)の先端部にはそれぞれ外部シ
ールド(16)がピン(9)によって連結されている。こ
の外部シールド(16)の端縁部内周(17)には曲率半径
R2、端縁部外周(18)には曲率半径R3の丸みを有してい
る。外部シールド(16)の内部の中心部にはそれぞれ内
部シールド(19)が螺着されており、この内部シールド
(19)は外部シールド(16)と一体になってシールドを
構成している。この内部シールド(17)は、それぞれ外
部シールド(16)の先端部より支持碍管(11)の中心部
方向へ突出しており、その先端部(20)は曲率半径R4
丸みを有している。
A first operating rod (14) extending from the arc-extinguishing chamber insulator (1) is provided inside the upper end of the supporting insulator (11), and an operating portion is provided inside the lower end of the supporting insulator (11). A second operating rod (15) extending from is provided. These first operating rods (14)
An outer shield (16) is connected to the tip of the second operating rod (15) by a pin (9). The radius of curvature is on the inner circumference (17) of the edge of this outer shield (16).
R 2 and the outer periphery (18) of the edge portion have a radius of curvature R 3 . Internal shields (19) are respectively screwed to the central portions inside the external shields (16), and the internal shields (19) are integrated with the external shields (16) to form a shield. The inner shield (17) projects from the tip of the outer shield (16) toward the center of the support insulator (11), and the tip (20) has a radius of curvature R 4 . .

支持碍管(11)の内部には、従来例の絶縁操作ロッド
(6)よりも外径の細い円筒状の絶縁操作ロッド(21)
が設けられており、この絶縁操作ロッド(21)は両端部
がそれぞれ外部シールド(16)の内部に螺着されてい
る。
Inside the support insulator (11), a cylindrical insulating operation rod (21) having an outer diameter smaller than that of the conventional insulating operation rod (6).
Both ends of the insulating operation rod (21) are screwed into the inside of the outer shield (16).

上記のように構成された電力用碍子形ガス遮断器におい
ては、課電部に所定の電圧が印加された場合、絶縁操作
ロッド(21)の上端部の周囲の電界は、第2図の破線に
示す等電位線(B)のようになっている。図のように、
従来例において等電位(A)の間隔が密であった部分に
当たる内部シールド(19)の先端部(20)付近では、等
電位線(B)は外部シールド(16)によって持ち上げら
れて間隔が疎になっている。また、外部シールド(16)
の端縁部外周(18)付近については、等電位線(B)は
内部シールド(19)によって図の下方へ下げされて間隔
が疎になっている。さらに、外部シールド(16)の端縁
部内周(17)付近については、内部シールド(19)と外
部シールド(16)の端縁部外周(18)とによって、等電
位線(B)の間隔が疎になっている。
In the insulator-type gas circuit breaker for electric power configured as described above, when a predetermined voltage is applied to the power applying section, the electric field around the upper end of the insulating operation rod (21) is broken by a broken line in FIG. The equipotential line (B) shown in FIG. As shown
The equipotential line (B) is lifted by the outer shield (16) near the tip portion (20) of the inner shield (19), which corresponds to a portion where the equipotential (A) is closely spaced in the conventional example, and the gap is sparse. It has become. External shield (16)
In the vicinity of the outer periphery (18) of the edge portion, the equipotential lines (B) are lowered by the inner shield (19) toward the lower part of the figure to make the intervals sparse. Furthermore, in the vicinity of the inner circumference (17) of the end portion of the outer shield (16), the equipotential line (B) is separated by the inner shield (19) and the outer circumference (18) of the end portion of the outer shield (16). It is sparse.

このように、外部シールド(16)および内部シールド
(19)が互いに端縁部内周(17),端縁部外周(18)お
よび先端部(20)での電界強度を下げあうので、曲率半
径R2,R3およびR4はそれぞれ小さくできる。また、曲率
半径R2が小さくなることによって絶縁操作ロッド(21)
の外径はシールドに束縛されずに、従来の絶縁操作ロッ
ド(6)よりも細くできる。これにともなって、支持碍
管(11)も従来の支持碍管(2)より細くできる。ま
た、支持碍管(11)と絶縁操作ロッド(21)との絶縁距
離も十分に確保できる。
In this way, the outer shield (16) and the inner shield (19) lower the electric field strength at the edge inner circumference (17), the edge outer circumference (18), and the tip end (20), so that the radius of curvature R 2 , R 3 and R 4 can be made smaller. In addition, since the radius of curvature R 2 becomes smaller, the insulation operation rod (21)
The outer diameter of is not restricted by the shield and can be made thinner than the conventional insulated operating rod (6). Along with this, the supporting insulator tube (11) can also be made thinner than the conventional supporting insulator tube (2). In addition, the insulation distance between the supporting insulator tube (11) and the insulating operation rod (21) can be sufficiently secured.

なお、上記実施例では絶縁操作ロッド(21)の両端部に
外部シールド(16)および内部シールド(19)を設けた
が、課電部側のみに設けてもよい。
Although the outer shield (16) and the inner shield (19) are provided at both ends of the insulating operation rod (21) in the above embodiment, they may be provided only on the side of the power applying unit.

また、上記実施例では絶縁操作ロッド(21)として円筒
状のものを示したが、筒状のものに限定されるものでは
なく、また断面形状も円形に限ったものではなく、棒状
のものであればよい。例えば、中空でない棒の場合に
は、端部に内部シールドを挿入するための穴を形成すれ
ばよい。
Further, although the insulating operation rod (21) has a cylindrical shape in the above embodiment, the insulating operation rod (21) is not limited to a cylindrical shape, and the cross-sectional shape is not limited to a circular shape, but may be a rod shape. I wish I had it. For example, in the case of a solid rod, a hole for inserting the inner shield may be formed at the end.

さらに、上記実施例では外部シールド(16)は絶縁操作
ロッド(21)に螺着させるものを示したが、例えば接着
など、螺着以外の取付方法であってもよい。また、内部
シールド(19)と外部シールド(16)とについても、一
体化できればよく、螺着以外の取付方法でもよい。
Furthermore, although the outer shield (16) is screwed to the insulating operation rod (21) in the above embodiment, it may be attached by a method other than screwing, such as bonding. Further, the inner shield (19) and the outer shield (16) may be integrated as long as they can be integrated, and a mounting method other than screwing may be used.

さらにまた、上記実施例では回路開閉装置として電力用
碍子形ガス遮断器について示したが、例えばタンク形ガ
ス遮断器、油遮断器および断路器など、絶縁操作ロッド
とシールドとを有する他の回路開閉装置であってもよ
く、上記実施例と同様の効果を奏する。
Furthermore, in the above embodiment, the power insulator type gas circuit breaker is shown as the circuit switchgear, but other circuit switchgear having an insulating operation rod and a shield such as a tank type gas circuit breaker, an oil circuit breaker and a disconnector. It may be a device, and has the same effect as that of the above-described embodiment.

[発明の効果] 以上説明したように、この発明の回路開閉装置は、絶縁
操作ロッドの端部外周を被うようにして設けられた外部
シールドと、絶縁操作ロッド内に外部シールドの先端部
よりも絶縁操作ロッドの中心部方向へ突出して設けられ
た内部シールドとからなるシールドを絶縁操作ロッドの
端部に設けたことによって、外部シールドと内部シール
ドとが互いにシールドの周囲の電界強度を下げあうの
で、シールド先端部の電界強度は低下され、耐電圧性能
を向上させることができるという効果がある。また、内
部シールドの先端部の電界強度が下がるので、内部シー
ルドが細くでき、この結果絶縁操作ロッドの外径もシー
ルドに束縛されずに細くできるという効果もある。さら
に、絶縁操作ロッドが細くなる結果、絶縁操作ロッドは
軽量化し、全体の動作が高速度化できるとともに低価格
化することができるという効果もある。
[Effects of the Invention] As described above, the circuit switchgear of the present invention includes the outer shield provided so as to cover the outer circumference of the end of the insulating operation rod, and the tip of the outer shield inside the insulating operation rod. Also, the outer shield and the inner shield mutually lower the electric field strength around the shield by providing the shield composed of the inner shield protruding toward the center of the insulating operation rod at the end of the insulating operation rod. Therefore, the electric field strength at the tip of the shield is lowered, and the withstand voltage performance can be improved. Further, since the electric field strength at the tip portion of the inner shield is reduced, the inner shield can be made thin, and as a result, the outer diameter of the insulating operation rod can be made thin without being bound by the shield. Further, as a result of the insulation operating rod becoming thinner, the insulation operating rod can be made lighter, and the overall operation can be speeded up and the cost can be reduced.

【図面の簡単な説明】[Brief description of drawings]

第1図はこの発明の一実施例を示す電力用碍子形ガス遮
断器の要部の一部切り欠き断面図、第2図は第1図の絶
縁操作ロッドの上端部を示す断面図、第3図は従来の回
路開閉装置の一例として電力用碍子形ガス遮断器の要部
を示す一部切り欠き断面図である。 図において、(16)は外部シールド、(19)は内部シー
ルド、(21)は絶縁操作ロッドである。 なお、各図中、同一符号は同一又は相当部分を示す。
FIG. 1 is a partially cutaway sectional view of a main part of an insulator type gas circuit breaker for electric power showing an embodiment of the present invention, and FIG. 2 is a sectional view showing an upper end portion of the insulating operation rod of FIG. FIG. 3 is a partially cutaway sectional view showing a main part of an insulator gas breaker for electric power as an example of a conventional circuit switchgear. In the figure, (16) is an outer shield, (19) is an inner shield, and (21) is an insulating operation rod. In each figure, the same reference numerals indicate the same or corresponding parts.

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】回路の開閉を行う開閉部と、この開閉部を
動作させる操作部と、この操作部と前記開閉部との間に
設けられ操作部からの駆動力を開閉部に伝達する絶縁操
作ロッドと、この絶縁操作ロッドの端部に設けられ絶縁
操作ロッドの端部における開閉部からの電界の電界強度
を低下させるシールドとを備えた回路開閉装置におい
て、前記シールドは、前記絶縁操作ロッドの端部外周を
被うようにして設けられた外部シールドと、前記絶縁操
作ロッド内に前記外部シールドの先端部よりも絶縁操作
ロッドの中心部方向へ突出して設けられた内部シールド
とからなっていることを特徴とする回路開閉装置。
1. An opening / closing unit for opening / closing a circuit, an operating unit for operating the opening / closing unit, and an insulation provided between the operating unit and the opening / closing unit for transmitting a driving force from the operating unit to the opening / closing unit. In a circuit switchgear comprising an operating rod and a shield provided at an end of the insulating operating rod to reduce electric field strength of an electric field from an opening / closing part at the end of the insulating operating rod, the shield is the insulating operating rod. An outer shield provided so as to cover the outer periphery of the end portion of the outer shield, and an inner shield provided in the insulating operation rod so as to protrude toward the center of the insulating operation rod from the tip of the outer shield. Circuit switchgear characterized by being
【請求項2】開閉部は消弧部であり、回路開閉装置は碍
子形ガス遮断器である特許請求の範囲第1項記載の回路
開閉装置。
2. The circuit switchgear according to claim 1, wherein the switchgear is an arc extinguishing part, and the circuit switchgear is an insulator gas circuit breaker.
JP31185787A 1987-12-11 1987-12-11 Circuit switchgear Expired - Lifetime JPH0721983B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP31185787A JPH0721983B2 (en) 1987-12-11 1987-12-11 Circuit switchgear

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP31185787A JPH0721983B2 (en) 1987-12-11 1987-12-11 Circuit switchgear

Publications (2)

Publication Number Publication Date
JPH01154419A JPH01154419A (en) 1989-06-16
JPH0721983B2 true JPH0721983B2 (en) 1995-03-08

Family

ID=18022254

Family Applications (1)

Application Number Title Priority Date Filing Date
JP31185787A Expired - Lifetime JPH0721983B2 (en) 1987-12-11 1987-12-11 Circuit switchgear

Country Status (1)

Country Link
JP (1) JPH0721983B2 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4050023B2 (en) 2001-09-17 2008-02-20 三菱電機株式会社 Insulated operation rod
NL1020582C2 (en) * 2002-05-13 2003-11-25 Holec Holland Nv Drive rod for switch.
EP2154700A1 (en) * 2008-08-14 2010-02-17 ABB Technology AG High voltage isolator with field control element
WO2016198236A1 (en) * 2015-06-11 2016-12-15 Abb Schweiz Ag A support insulator with electric field distribution part
CN105931874A (en) * 2016-07-13 2016-09-07 武汉泰普变压器开关有限公司 Operation rod of tap changer

Also Published As

Publication number Publication date
JPH01154419A (en) 1989-06-16

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