JP3393509B2 - Main circuit switchgear - Google Patents

Main circuit switchgear

Info

Publication number
JP3393509B2
JP3393509B2 JP11051899A JP11051899A JP3393509B2 JP 3393509 B2 JP3393509 B2 JP 3393509B2 JP 11051899 A JP11051899 A JP 11051899A JP 11051899 A JP11051899 A JP 11051899A JP 3393509 B2 JP3393509 B2 JP 3393509B2
Authority
JP
Japan
Prior art keywords
main circuit
metal container
conductor
disconnecting
transformer
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 - Fee Related
Application number
JP11051899A
Other languages
Japanese (ja)
Other versions
JP2000308222A (en
Inventor
昌史 松木
猛 岩崎
幹雄 森
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
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Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP11051899A priority Critical patent/JP3393509B2/en
Publication of JP2000308222A publication Critical patent/JP2000308222A/en
Application granted granted Critical
Publication of JP3393509B2 publication Critical patent/JP3393509B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Circuit Breakers (AREA)
  • Gas-Insulated Switchgears (AREA)

Description

【発明の詳細な説明】 【0001】 【発明の属する技術分野】この発明は、低圧同期方式の
発電プラントで、発電機と主変圧器との間に配置される
主回路開閉装置に係わり、特に、発電機側と主変圧器側
とに接続される計器用変圧器およびサージアブソーバの
配置構造に関するものである。 【0002】 【従来の技術】図6は発電プラントの高圧同期方式の場
合の単線結線図、図7は発電プラントの低圧同期方式の
場合の単線結線図、図8は主回路開閉装置の電気接続を
示す単線結線図、図9は発電主回路の接続を示す単線結
線図、図10は発電主回路の機器配置を示す正面図であ
る。 【0003】図において、1は発電機、2は主変圧器、
3は所内変圧器、4は起動変圧器、5〜8は遮断器、9
は母線、10,11は送電線で、発電機1は主変圧器2
と直結され、遮断器5を介して送電線10と接続されて
いる。そして、発電機1と主変圧器2とは、所内変圧器
3,遮断器6を介して母線9と接続されている。なお、
起動変圧器4は、遮断器7を介して母線9と、遮断器8
を介して送電線11とに接続されている。この高圧同期
方式において、発電機1の起動時には、起動変圧器4お
よび所内変圧器3を経由して発電機1に電力を供給し、
送電線10の電圧と同期をとって、遮断器5により発電
機1による電力を主変圧器2経由で送電線10に投入す
るようにされている。 【0004】上記の高電圧同期方式に代わって、最近、
起動変圧器4を不要とした、図7の単線結線図に示すよ
うな、低圧同期方式が採用されるようになってきた。こ
の場合、発電機1と主変圧器2との間に主回路開閉装置
12が配置される。図8に主回路開閉装置12の構成を
示す。図において、13は遮断器、14は遮断器13と
接続された断路器、15は遮断器13と接続された遮断
器側接地装置、16は断路器14と接続された断路器側
接地装置、17は遮断器側の電流を計測する計器用変流
器、18は断路器側の電流を計測する計器用変流器であ
る。 【0005】そして、遮断器13、断路器14、遮断器
側および断路器側接地装置15,16を、それぞれ個別
の単体機器としてこれらを寄せ集めて配置するよりも、
これらすべてを同一容器内で一体化する方が据付面積を
小さくすることができ、また、製造コストを低くするこ
とができることから、一体型主回路開閉装置が多く採用
される方向にある。 【0006】また、主回路開閉装置12が設置される発
電プラントにおいては、発電機1と接続される側には発
電機1の電圧計測用として計器用変圧器が、また、主変
圧器に接続された母線の電圧の計測用としての計器用変
圧器、および異常電圧からの保護用としてのサージアブ
ソーバが必要とされる。上記の計器用変圧器とサージア
ブソーバとは、図9および図10に示すように配置し接
続される。 【0007】図9および図10において、20は主回路
開閉装置12の発電機1側に配置された第1のキュービ
クルで、図示はしないが計器用変圧器が収納されてい
る。21は主回路閉装置12の発電機1側と接続された
主導体、22は主導体21から分岐された分岐導体で、
第1のキュービクル20内に引き込まれ、計器用変圧器
と接続されている。23は主回路開閉装置12の主変圧
器2側に配置された第2のキュービクルで、図示はしな
いが計器用変圧器とサージアブソーバが収納されてい
る。24は主回路開閉装置12の主変圧器2側と接続さ
れた主導体、25は主導体24から分岐された分岐導体
で、第2のキュービクル23内に引き込まれ、計器用変
圧器およびサージアブソーバに接続されている。 【0008】図11は特開平11−53999号公報に
示された従来の主回路開閉装置の構成を示す正面図であ
る。図において、26は絶縁筒、27は絶縁筒26の一
端に固定された遮断部固定側導体、28は絶縁筒26の
他端に固定された遮断部可動側導体、29は遮断部固定
側導体27に固定された固定接触子、30は可動接触子
で、遮断部可動側導体28内に固定接触子29と摺動部
を介して接離可能に支持されている。そして、上記絶縁
筒26、遮断部固定側導体27、遮断部可動側導体2
8、固定接触子29および可動接触子30で遮断部31
が形成される。 【0009】32は遮断部可動側導体28と連結された
断路部固定接触子で、遮断部可動側導体28との間には
隔壁33が形成され、遮断部可動側導体28内には6フ
ッ化イオウなどの絶縁ガスが封入されている。34は断
路部固定側導体32と離隔して配置された断路部可動側
導体、35は可動導体で、断路部可動側導体34内に固
定接触子32と摺動部を介して接離可能に支持されてい
る。そして、上記固定接触子32、断路部可動側導体3
4および可動導体35で断路部36が形成される。 【0010】37は遮断部可動側導体28を介して遮断
部31を支持する第1の絶縁支持部材、38は断路部可
動側導体34を介して断路部36を支持する第2の絶縁
支持部材、39は遮断部固定側導体27と接続された外
部引き出し用端子、40は断路部可動側導体34と接続
された外部引き出し用端子、41は遮断部31と断路部
36とを一体に被う第1の金属容器、42,43はそれ
ぞれ第1の金属容器41の両端部の内側に配置された計
器用変流器である。 【0011】44は第1の金属容器41の下部と連結さ
れた支持架台としての第2の金属容器で、この第2の金
属容器44上に第1と第2の絶縁支持部材37,38が
配置されている。45は第2の金属容器44内に配置さ
れた遮断部操作装置で、第1の絶縁操作ロッド46を有
し、可動接触子30を固定接触子29と接離可能に操作
する。47は第2の金属容器44内に配置された断路部
操作装置で、第2の絶縁操作ロッド48を有し、可動導
体35を固定接触子32と接離可能に操作する。 【0012】49は第2の金属容器44内に配置された
遮断部接地操作装置で、第1の接地導体50を介して遮
断部固定側導体27を接地可能に操作する。51は第2
の金属容器42内に配置された断路部接地操作装置で、
第2の接地導体52を介して断路部可動導体34を接地
可能に操作する。 【0013】上記のような構成とすることにより、遮断
部31、断路部36、遮断器側接地装置としての49,
50、断路器側接地装置としての51,52が一体化さ
れて、図8に示すように主回路開閉装置12が構成され
る。 【0014】 【発明が解決しようとする課題】従来の主回路開閉装置
は、以上のように、遮断部31および断路部36を第1
の金属容器41内に配置し、第1の金属容器41の下側
と連結された第2の金属容器44内に、遮断部31と断
路部36のそれぞれを接離および接地操作する各操作装
置45,47、および49,51を配置して、設置スペ
ースの縮小化を図るようにしているが、発電プラントに
設置する場合には、図9および図10に示すように、主
回路開閉装置12の両側にキュービクル20,23を配
置し、このキュービクル20,23内に計器用変圧器や
サージアブソーバを収納しなければならないので、設置
スペースの縮小化や作業の合理化を達成することが困難
であるという問題点があった。 【0015】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、遮断部および断路部を操作する
操作装置を収納した第2の金属容器内に、計器用変圧器
およびサージアブソーバを収納して、発電プラントでの
設置スペースの縮小化を可能にした主回路開閉装置を得
ることを目的とする。 【0016】 【課題を解決するための手段】この発明の請求項1に係
わる主回路開閉装置は、第1の金属容器内に電気的に接
続して配置された遮断部および断路部と、第1の金属容
器の下部に連結された第2の金属容器内に配置され、遮
断部および断路部をそれぞれ接離操作する操作装置を備
えた主回路開閉装置において、第1と第2の金属容器の
連結部を貫通してそれぞれ配置され遮断部と接続された
第1の絶縁ブッシング、および断路部と接続された第2
の絶縁ブッシング、第2の金属容器内にそれぞれ配置さ
れ第1の絶縁ブッシングと接続された計器用変圧器、お
よび第2の絶縁ブッシングとそれぞれ接続された計器用
変圧器とサージアブソーバを備えたものである。 【0017】 【発明の実施の形態】実施の形態1.以下、この発明の
実施の形態を図について説明する。図1はこの発明の実
施の形態1による主回路開閉装置の構成を示す正面図、
図2は図1の主回路開閉装置の一部を断面で示す側面
図、図3は図1の主回路開閉装置の電気接続を示す単線
結線図である。 【0018】図において、56は絶縁筒、57は絶縁筒
56の一端に固定された遮断部固定側導体、58は絶縁
筒56の他端に固定された遮断部可動側導体、59は遮
断部固定側導体57に固定された固定接触子、60は可
動接触子で、遮断部可動側導体58内に固定接触子59
と摺動部を介して接離可能に支持されている。そして、
上記絶縁筒56、遮断部固定側導体57、遮断部可動側
導体58、固定接触子59および可動接触子60で遮断
部61が形成される。 【0019】62は遮断部可動側導体58と連結された
断路部固定接触子で、遮断部可動側導体58との間には
隔壁63が形成され、遮断部可動側導体58内には6フ
ッ化イオウなどの絶縁ガスが封入されている。64は断
路部固定側導体62と離隔して配置された断路部可動側
導体、65は可動導体で、断路部可動側導体64内に固
定接触子62と摺動部を介して接離可能に支持されてい
る。そして、上記固定接触子62、断路部可動側導体6
4および可動導体65で断路部66が形成される。 【0020】67は遮断部可動側導体58を介して遮断
部61を支持する第1の絶縁支持部材、68は断路部可
動側導体64を介して断路部66を支持する第2の絶縁
支持部材、69は遮断部固定側導体57と接続された外
部引き出し用端子、70は断路部可動側導体64と接続
された外部引き出し用端子、71は遮断部61と断路部
66とを一体に被う第1の金属容器、72,73はそれ
ぞれ第1の金属容器71の両端部の内側に配置された計
器用変流器である。 【0021】74は第1の金属容器71の下部と連結さ
れた支持架台としての第2の金属容器で、この第2の金
属容器74上に第1と第2の絶縁支持部材67,68が
配置されている。75は第2の金属容器74内に配置さ
れた遮断部操作装置で、第1の絶縁操作ロッド76を有
し、可動接触子60を固定接触子59と接離可能に操作
する。77は第2の金属容器74内に配置された断路部
操作装置で、第2の絶縁操作ロッド78を有し、可動導
体65を固定接触子62と接離可能に操作する。 【0022】79は第2の金属容器74内に配置された
遮断部接地操作装置で、第1の接地導体80を介し遮断
部固定側導体57を接地可能に操作する。81は第2の
金属容器74内に配置された断路部接地操作装置で、第
2の接地導体82を介し断路部可動導体64と接地可能
に操作する。 【0023】83は両金属容器71,74の連結部を貫
通して配置された第1の絶縁ブッシングで、接続線84
によって上部が遮断部固定側導体57と接続されてい
る。85は両金属容器71,74の連結部を貫通して配
置された第2の絶縁ブッシングで、接続線86によって
上部が断路部可動側導体64と接続されいる。87は第
2の金属容器74内に配置された計器用変圧器で、接続
線88によって第1の絶縁ブッシング83と接続されて
いる。89は第2の金属容器74内に配置された計器用
変圧器、90は計器用変圧器89と隣接して配置された
サージアブソーバで、それぞれ接続線91によって第2
の絶縁ブッシング85と接続されている。 【0024】上記のような構成とすることにより、遮断
部61、路断路部66、計器用変流器72,73、遮断
部側接地装置79、断路部側接地装置81、計器用変圧
器87、計器用変圧器89、サージアブソーバ90を一
体に収納し、図3に示すような主回路開閉装置92が形
成される。 【0025】以上のように実施の形態1によれば、電気
的に接続された遮断部61と断路部66とを収納した第
1の金属容器71の下部と連結された第2の金属容器7
4との連結部を貫通して第1と第2の絶縁ブッシング8
3,85をそれぞれ配置し、各絶縁ブッシング83,8
5を介して計器用変圧器87,89およびとサージアブ
ソーバ90をそれぞれ配置した構成としたので、従来の
ように主回路開閉装置92の両側にキュービクルを配置
する必要がなく、発電プラントにおける接地面積の縮小
化を図ることができる。 【0026】また、通電中の高磁界および高温の影響を
受けるのを防止することができるので、機器の信頼性お
よび保守性の向上が可能となる。また、第1の金属容器
71内には第1と第2の絶縁ブッシング83,85の各
一半のみが存在するので、開閉装置の機器に対しての絶
縁距離などの裕度が増し、設計自由度を増すことができ
る。 【0027】実施の形態2.図4は、この発明の実施の
形態2における主回路開閉装置の構成を示す正面図であ
り、遮断部側に計器用変圧器を複数配置した以外は、実
施の形態1を示す図1のものと同様のため、詳細な説明
は省略する。上記実施の形態1においては、遮断部61
側に接続される計器用変圧器87は1個の場合について
説明したが、本実施の形態におけるように、計器用変圧
器87が2個の場合に適用しても、上記実施の形態1と
同様の効果を得ることができる。 【0028】実施の形態3.図5は、この発明の実施の
形態3における主回路開閉装置の構成を示す正面図であ
り、断路部固定接触子62と可動接触子65が、実施の
形態1のものと逆に配置構成された主回路開閉装置にお
いても、実施の形態1と同様の効果を得ることができ
る。 【0029】 【発明の効果】以上のようにこの発明の請求項1によれ
ば、第1の金属容器内に電気的に接続して配置された遮
断部および断路部と、第1の金属容器の下部に連結され
た第2の金属容器内に配置され断路部および遮断部をそ
れぞれ接離操作する操作装置を備えた主回路開閉装置に
おいて、第1と第2の金属容器の連結部を貫通してそれ
ぞれ配置され遮断部と接続された第1の絶縁ブッシン
グ、および断路部と接続された第2の絶縁ブッシング、
第2の金属容器内にそれぞれ配置され第1の絶縁ブッシ
ングと接続された計器用変圧器、および第2の絶縁ブッ
シングとそれぞれ接続された計器用変圧器とサージアブ
ソーバを備えた構成としたので、設置面積の縮小化が可
能な主回路開閉装置を提供することができる。
Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a main circuit switchgear disposed between a generator and a main transformer in a low-voltage synchronous power plant. The present invention relates to an arrangement structure of an instrument transformer and a surge absorber connected to a generator side and a main transformer side. FIG. 6 is a single line connection diagram in the case of a high voltage synchronous system of a power plant, FIG. 7 is a single line connection diagram in the case of a low voltage synchronous system of a power plant, and FIG. 8 is an electrical connection of a main circuit switchgear. FIG. 9 is a single line connection diagram showing connection of the power generation main circuit, and FIG. 10 is a front view showing the equipment arrangement of the power generation main circuit. In the figure, 1 is a generator, 2 is a main transformer,
3 is an in-house transformer, 4 is a start-up transformer, 5 to 8 are circuit breakers, 9
Is a bus line, 10 and 11 are transmission lines, and a generator 1 is a main transformer 2
And is connected to the power transmission line 10 via the circuit breaker 5. The generator 1 and the main transformer 2 are connected to the bus 9 via the on-site transformer 3 and the circuit breaker 6. In addition,
The starting transformer 4 has a bus 9 and a circuit breaker 8 via a circuit breaker 7.
Is connected to the power transmission line 11. In this high voltage synchronous system, when the generator 1 is started, power is supplied to the generator 1 via the starting transformer 4 and the in-house transformer 3,
In synchronism with the voltage of the power transmission line 10, the circuit breaker 5 inputs power from the generator 1 to the power transmission line 10 via the main transformer 2. In place of the above high voltage synchronization method, recently,
A low-voltage synchronous system as shown in the single-line connection diagram of FIG. 7 that does not require the starting transformer 4 has been adopted. In this case, the main circuit switching device 12 is disposed between the generator 1 and the main transformer 2. FIG. 8 shows the configuration of the main circuit switching device 12. In the figure, 13 is a circuit breaker, 14 is a disconnecting device connected to the circuit breaker 13, 15 is a circuit breaker side grounding device connected to the circuit breaker 13, 16 is a circuit breaker side grounding device connected to the disconnecting device 14, Reference numeral 17 denotes an instrument current transformer that measures the current on the circuit breaker side, and reference numeral 18 denotes an instrument current transformer that measures the current on the disconnector side. Then, rather than arranging the breaker 13, the breaker 14, the breaker side and the breaker side grounding devices 15 and 16 as separate single devices, they are arranged together.
If all of these are integrated in the same container, the installation area can be reduced and the manufacturing cost can be reduced. Therefore, the integrated main circuit switchgear is often used. [0006] In the power plant where the main circuit switchgear 12 is installed, an instrument transformer is connected to the generator 1 for measuring the voltage of the generator 1 and also connected to the main transformer. There is a need for an instrument transformer for measuring the voltage of the connected bus and a surge absorber for protecting against abnormal voltages. The instrument transformer and the surge absorber are arranged and connected as shown in FIGS. In FIGS. 9 and 10, reference numeral 20 denotes a first cubicle disposed on the generator 1 side of the main circuit switching device 12, which houses an instrument transformer (not shown). 21 is a main conductor connected to the generator 1 side of the main circuit closing device 12, 22 is a branch conductor branched from the main conductor 21,
It is drawn into the first cubicle 20 and connected to an instrument transformer. Reference numeral 23 denotes a second cubicle disposed on the main transformer 2 side of the main circuit switchgear 12 and accommodates an instrument transformer and a surge absorber (not shown). Reference numeral 24 is a main conductor connected to the main transformer 2 side of the main circuit switchgear 12, and 25 is a branch conductor branched from the main conductor 24. The branch conductor is drawn into the second cubicle 23, and is used as an instrument transformer and surge absorber. It is connected to the. FIG. 11 is a front view showing the structure of a conventional main circuit switchgear disclosed in Japanese Patent Laid-Open No. 11-53999. In the figure, 26 is an insulating tube, 27 is a blocking portion fixed side conductor fixed to one end of the insulating tube 26, 28 is a blocking portion movable side conductor fixed to the other end of the insulating tube 26, and 29 is a blocking portion fixed side conductor. A fixed contact 30 fixed to 27, 30 is a movable contact, and is supported in the blocking portion movable-side conductor 28 through a fixed contact 29 and a sliding portion so as to be able to contact and separate. And the said insulation cylinder 26, interruption | blocking part fixed side conductor 27, interruption | blocking part movable side conductor 2
8. Blocking section 31 with fixed contact 29 and movable contact 30
Is formed. Reference numeral 32 denotes a disconnecting portion fixed contact connected to the breaking portion movable side conductor 28, and a partition wall 33 is formed between the breaking portion movable side conductor 28, and the cutoff portion movable side conductor 28 has six hooks. Insulating gas such as sulfur fluoride is enclosed. Reference numeral 34 denotes a disconnecting portion movable side conductor disposed away from the disconnecting portion fixed side conductor 32, and reference numeral 35 denotes a movable conductor, which can be connected to and disconnected from the disconnecting portion movable side conductor 34 via the fixed contact 32 and the sliding portion. It is supported. And the said fixed contact 32, the disconnection part movable side conductor 3
4 and the movable conductor 35 form a disconnecting portion 36. Reference numeral 37 denotes a first insulating support member that supports the blocking portion 31 via the blocking portion movable side conductor 28, and reference numeral 38 denotes a second insulating support member that supports the disconnection portion 36 via the disconnection portion movable side conductor 34. , 39 is an external lead terminal connected to the blocking portion fixed-side conductor 27, 40 is an external lead terminal connected to the disconnecting portion movable side conductor 34, and 41 covers the blocking portion 31 and the disconnecting portion 36 integrally. The first metal containers 42 and 43 are current transformers for measuring instruments arranged inside both ends of the first metal container 41, respectively. Reference numeral 44 denotes a second metal container as a support frame connected to the lower portion of the first metal container 41. On the second metal container 44, the first and second insulating support members 37 and 38 are provided. Is arranged. Reference numeral 45 denotes a shut-off unit operating device disposed in the second metal container 44, which has a first insulating operating rod 46 and operates the movable contact 30 so as to be able to contact and separate from the fixed contact 29. Reference numeral 47 denotes a disconnecting portion operating device disposed in the second metal container 44, which has a second insulating operating rod 48 and operates the movable conductor 35 so as to be able to contact and separate from the fixed contact 32. Reference numeral 49 denotes a breaking portion grounding operation device disposed in the second metal container 44, and manipulates the breaking portion fixing side conductor 27 via the first grounding conductor 50 so that it can be grounded. 51 is the second
In the disconnecting portion grounding operation device arranged in the metal container 42,
The disconnecting portion movable conductor 34 is operated via the second ground conductor 52 so as to be grounded. With the above configuration, the breaker 31, the breaker 36, 49 as the breaker-side grounding device,
50, 51 and 52 as disconnector side grounding devices are integrated, and the main circuit switching device 12 is configured as shown in FIG. [0014] As described above, the conventional main circuit switching device includes the blocking portion 31 and the disconnecting portion 36 in the first manner.
Each of the operating devices that are arranged in the metal container 41 and operate to contact / separate each of the blocking part 31 and the disconnecting part 36 in the second metal container 44 connected to the lower side of the first metal container 41. 45, 47 and 49, 51 are arranged to reduce the installation space. However, when installing in a power plant, as shown in FIGS. 9 and 10, the main circuit switching device 12 is provided. Since cubicles 20 and 23 are arranged on both sides of the cabinet and an instrument transformer and a surge absorber must be accommodated in the cubicles 20 and 23, it is difficult to reduce the installation space and rationalize the work. There was a problem. The present invention has been made to solve the above-mentioned problems. An instrument transformer and a surge absorber are provided in a second metal container in which an operating device for operating a shut-off portion and a disconnecting portion is housed. The main circuit switchgear that can reduce the installation space in the power plant is obtained. According to a first aspect of the present invention, there is provided a main circuit switchgear according to a first aspect of the present invention. In a main circuit switching device provided in a second metal container connected to the lower part of one metal container and having an operating device for operating a contact portion and a disconnecting portion respectively, the first and second metal containers A first insulating bushing that is disposed through the connecting portion and connected to the blocking portion, and a second insulating bushing that is connected to the disconnecting portion.
Insulating bushings, instrument transformers disposed in a second metal container and connected to the first insulating bushings, and instrument transformers and surge absorbers respectively connected to the second insulating bushings It is. DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 Embodiments of the present invention will be described below with reference to the drawings. 1 is a front view showing a configuration of a main circuit switching device according to Embodiment 1 of the present invention;
2 is a side view showing a part of the main circuit switchgear of FIG. 1 in cross section, and FIG. 3 is a single-line diagram showing electrical connection of the main circuit switchgear of FIG. In the figure, 56 is an insulating tube, 57 is a blocking portion fixed side conductor fixed to one end of the insulating tube 56, 58 is a blocking portion movable side conductor fixed to the other end of the insulating tube 56, and 59 is a blocking portion. A fixed contact 60 fixed to the fixed-side conductor 57, 60 is a movable contact, and the fixed contact 59 in the blocking portion movable-side conductor 58 is provided.
And is supported so as to be able to contact and separate through a sliding part. And
The insulating cylinder 56, the blocking portion fixed side conductor 57, the blocking portion movable side conductor 58, the fixed contact 59 and the movable contact 60 form a blocking portion 61. Reference numeral 62 denotes a disconnecting portion fixed contact connected to the breaking portion movable side conductor 58, and a partition wall 63 is formed between the breaking portion movable side conductor 58. Insulating gas such as sulfur fluoride is enclosed. Reference numeral 64 denotes a disconnectable portion movable side conductor disposed away from the disconnectable portion fixed side conductor 62, and reference numeral 65 denotes a movable conductor, which can be brought into and out of contact with the fixed contactor 62 and the sliding portion in the disconnectable portion movable side conductor 64. It is supported. And the said stationary contact 62, the disconnection part movable side conductor 6
4 and the movable conductor 65 form a disconnecting portion 66. Reference numeral 67 denotes a first insulating support member that supports the blocking portion 61 via the blocking portion movable side conductor 58, and 68 denotes a second insulating support member that supports the disconnection portion 66 via the disconnection portion movable side conductor 64. 69 is an external lead terminal connected to the blocking portion fixed side conductor 57, 70 is an external lead terminal connected to the disconnecting portion movable side conductor 64, and 71 integrally covers the blocking portion 61 and the disconnecting portion 66. The first metal containers 72 and 73 are current transformers for measuring instruments arranged inside the both ends of the first metal container 71, respectively. 74 is a second metal container as a support frame connected to the lower part of the first metal container 71. On the second metal container 74, the first and second insulating support members 67 and 68 are provided. Is arranged. Reference numeral 75 denotes a shut-off unit operating device arranged in the second metal container 74, which has a first insulating operating rod 76, and operates the movable contact 60 so as to be able to contact and separate from the fixed contact 59. Reference numeral 77 denotes a disconnecting portion operating device arranged in the second metal container 74, which has a second insulating operating rod 78 and operates the movable conductor 65 so as to be able to contact and separate from the fixed contact 62. 79 is a breaker grounding operation device arranged in the second metal container 74, and operates the breaker fixed side conductor 57 via the first grounding conductor 80 so that it can be grounded. Reference numeral 81 denotes a disconnecting portion grounding operation device disposed in the second metal container 74, and operates so that the disconnecting portion movable conductor 64 can be grounded via the second grounding conductor 82. Reference numeral 83 denotes a first insulating bushing which is disposed through the connecting portion between the two metal containers 71 and 74.
As a result, the upper part is connected to the blocking part fixed-side conductor 57. Reference numeral 85 denotes a second insulating bushing that is disposed through the connecting portion between the two metal containers 71 and 74, and the upper portion is connected to the disconnecting portion movable-side conductor 64 by a connection line 86. Reference numeral 87 denotes an instrument transformer disposed in the second metal container 74 and is connected to the first insulating bushing 83 by a connection line 88. 89 is an instrument transformer disposed in the second metal container 74, and 90 is a surge absorber disposed adjacent to the instrument transformer 89.
The insulating bushing 85 is connected. With the above-described configuration, the breaker 61, the disconnector 66, the instrument current transformers 72 and 73, the interrupter grounding device 79, the disconnector grounding device 81, and the instrument transformer 87. The instrument transformer 89 and the surge absorber 90 are housed together to form a main circuit switching device 92 as shown in FIG. As described above, according to the first embodiment, the second metal container 7 connected to the lower portion of the first metal container 71 containing the electrically connected blocking part 61 and the disconnecting part 66 is provided.
First and second insulating bushings 8 that pass through the connecting portion with 4
3 and 85, respectively, and the insulating bushings 83 and 8
5, the instrument transformers 87 and 89 and the surge absorber 90 are arranged, so that there is no need to arrange cubicles on both sides of the main circuit switching device 92 as in the prior art, and the grounding area in the power plant Can be reduced. Further, since it can be prevented from being affected by a high magnetic field and high temperature during energization, the reliability and maintainability of the equipment can be improved. In addition, since only half of each of the first and second insulating bushings 83 and 85 exists in the first metal container 71, the tolerance of the insulation distance to the switchgear device is increased, and the design freedom is increased. The degree can be increased. Embodiment 2 FIG. FIG. 4 is a front view showing the configuration of the main circuit switchgear according to Embodiment 2 of the present invention, and is the one shown in FIG. 1 showing Embodiment 1 except that a plurality of instrument transformers are arranged on the interrupting section side. Detailed description will be omitted. In the first embodiment, the blocking unit 61
Although the case where there is one instrument transformer 87 connected to the side has been described, even if it is applied to the case where there are two instrument transformers 87 as in the present embodiment, Similar effects can be obtained. Embodiment 3 FIG. FIG. 5 is a front view showing the configuration of the main circuit switchgear according to the third embodiment of the present invention, in which the disconnecting portion fixed contact 62 and the movable contact 65 are arranged opposite to those in the first embodiment. Also in the main circuit switching device, the same effect as in the first embodiment can be obtained. As described above, according to the first aspect of the present invention, the blocking portion and the disconnecting portion which are arranged in electrical connection within the first metal container, and the first metal container. In a main circuit switchgear having an operating device arranged in a second metal container connected to the lower part of the switch and operating the disconnecting part and the shutoff part respectively, the connecting part of the first and second metal containers is penetrated. A first insulating bushing each disposed and connected to the blocking portion, and a second insulating bushing connected to the disconnecting portion,
Since it was set as the structure provided with the instrument transformer and the surge absorber each arrange | positioned in the 2nd metal container and connected with the 1st insulation bushing, and the 2nd insulation bushing, respectively, A main circuit switching device capable of reducing the installation area can be provided.

【図面の簡単な説明】 【図1】 この発明の実施の形態1による主回路開閉装
置の構成を示す正面図である。 【図2】 図1中の一部を断面で示す側面図である。 【図3】 図1中の電気接続を示す単線結線図である。 【図4】 この発明の実施の形態2による主回路開閉装
置の構成を示す正面図である。 【図5】 この発明の実施の形態3による主回路開閉装
置の構成を示す正面図である。 【図6】 発電プラントの高圧同期方式の場合の単線結
線図である。 【図7】 発電プラントの低圧同期方式の場合の単線結
線図である。 【図8】 従来の一体型主回路開閉装置の電気接続を示
す単線結線図である。 【図9】 発電主回路の接続を示す単線結線図である。 【図10】 発電主回路の機器配置を示す正面図であ
る。 【図11】 従来の主回路開閉装置の構成を示す正面図
である。 【符号の説明】 61 遮断部、66 断路部、71 第1の金属容器、
74 第2の金属容器、83 第1の絶縁ブッシング、
85 第2のブッシング、87,89 計器用変圧器、
90 サージアブソーバ。
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view showing a configuration of a main circuit switchgear according to Embodiment 1 of the present invention. FIG. 2 is a side view showing a part of FIG. 1 in section. FIG. 3 is a single-line diagram showing electrical connections in FIG. FIG. 4 is a front view showing a configuration of a main circuit switchgear according to Embodiment 2 of the present invention. FIG. 5 is a front view showing a configuration of a main circuit switching device according to Embodiment 3 of the present invention; FIG. 6 is a single line connection diagram in the case of a high voltage synchronous system of a power plant. FIG. 7 is a single line connection diagram in the case of a low-pressure synchronous system of a power plant. FIG. 8 is a single-line diagram showing electrical connection of a conventional integrated main circuit switchgear. FIG. 9 is a single-line diagram showing connection of the power generation main circuit. FIG. 10 is a front view showing a device arrangement of the power generation main circuit. FIG. 11 is a front view showing a configuration of a conventional main circuit switchgear. [Explanation of symbols] 61 interception part, 66 disconnection part, 71 first metal container,
74 second metal container, 83 first insulating bushing,
85 Second bushing, 87,89 Instrument transformer,
90 Surge absorber.

───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平8−306282(JP,A) 特開 平3−239105(JP,A) (58)調査した分野(Int.Cl.7,DB名) H02B 13/02 H01H 31/32 H01H 33/70 - 33/99 ─────────────────────────────────────────────────── ─── Continuation of front page (56) References JP-A-8-306282 (JP, A) JP-A-3-239105 (JP, A) (58) Fields investigated (Int.Cl. 7 , DB name) H02B 13/02 H01H 31/32 H01H 33/70-33/99

Claims (1)

(57)【特許請求の範囲】 【請求項1】 第1の金属容器内に電気的に接続して配
置された遮断部および断路部と、上記第1の金属容器の
下部に連結された第2の金属容器内に配置され上記遮断
部および上記断路部をそれぞれ接離操作する操作装置を
備えた主回路開閉装置において、上記第1と第2の金属
容器の連結部を貫通してそれぞれ配置され上記遮断部と
接続された第1の絶縁ブッシング、および上記断路部と
接続された第2の絶縁ブッシング、上記第2の金属容器
内にそれぞれ配置され上記第1の絶縁ブッシングと接続
された計器用変圧器、および上記第2の絶縁ブッシング
とそれぞれ接続された計器用変圧器とサージアブソーバ
を備えたことを特徴とする主回路開閉装置。
(57) Claims 1. A blocking portion and a disconnecting portion that are electrically connected in a first metal container, and a first portion connected to a lower portion of the first metal container. In a main circuit switchgear provided with an operating device that is disposed in two metal containers and operates to connect and separate the shut-off part and the disconnecting part, respectively, and is disposed through the connecting part of the first and second metal containers. A first insulating bushing connected to the blocking portion, a second insulating bushing connected to the disconnecting portion, and a meter disposed in the second metal container and connected to the first insulating bushing. A main circuit switchgear comprising: an electrical transformer, and an instrument transformer and a surge absorber respectively connected to the second insulating bushing.
JP11051899A 1999-04-19 1999-04-19 Main circuit switchgear Expired - Fee Related JP3393509B2 (en)

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Application Number Priority Date Filing Date Title
JP11051899A JP3393509B2 (en) 1999-04-19 1999-04-19 Main circuit switchgear

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11051899A JP3393509B2 (en) 1999-04-19 1999-04-19 Main circuit switchgear

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Publication Number Publication Date
JP2000308222A JP2000308222A (en) 2000-11-02
JP3393509B2 true JP3393509B2 (en) 2003-04-07

Family

ID=14537836

Family Applications (1)

Application Number Title Priority Date Filing Date
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Country Link
JP (1) JP3393509B2 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4738266B2 (en) * 2006-06-27 2011-08-03 三菱電機株式会社 Power switchgear

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