JP3398949B2 - Ground switch - Google Patents
Ground switchInfo
- Publication number
- JP3398949B2 JP3398949B2 JP17729096A JP17729096A JP3398949B2 JP 3398949 B2 JP3398949 B2 JP 3398949B2 JP 17729096 A JP17729096 A JP 17729096A JP 17729096 A JP17729096 A JP 17729096A JP 3398949 B2 JP3398949 B2 JP 3398949B2
- Authority
- JP
- Japan
- Prior art keywords
- fixed contact
- side fixed
- contact portion
- load
- power supply
- 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
Links
Landscapes
- Patch Boards (AREA)
- Gas-Insulated Switchgears (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Description
【発明の詳細な説明】
【０００１】
【発明の属する技術分野】本発明は、スポットネットワ
ーク受電設備などに使用される接地開閉器に関する。
【０００２】
【従来の技術】一般に、スポットネットワーク受電設備
などに使用される接地開閉器は、可動接触子が電源側を
接地する位置、負荷側を接地する位置およびこれら両者
とは切離された断路位置の三位置で停止するように構成
される。図３はこの種の従来の接地開閉器の一例を示す
単線結線図で、ケーブルヘッド７が接続された電源側
と、変圧器５が接続された負荷側との間には、断路器４
が設けられる。断路器４に対向して配設された接地開閉
器は、断路器４の電源側に設けられた電源側固定接触部
２２と、断路器４の負荷側に設けられた負荷側固定接触
部２３と、回動可能に設けられた可動接触子２１とを備
える。なお、６は検電装置である
【０００３】かかる接地開閉器は、図３に示すような断
路器４の閉路状態においては、可動接触子２１が電源側
固定接触部２２と負荷側固定接触部２３との間の中間に
位置し、電源側固定接触部２２および負荷側固定接触部
２３のいずれにも接触しない断路位置にあり、断路器
４、電源側固定接触部２２および負荷側固定接触部２３
に対して、それぞれ必要な絶縁距離を保持している。接
地操作を行う場合には、断路器４を開路した後、可動接
触子２１を回動して、電源側固定接触部２２に接触させ
て停止させれば、電源側が接地される。また、可動接触
子２１を逆方向に回動して、負荷側固定接触部２３に接
触させて停止させれば、負荷側が接地される。
【０００４】
【発明が解決しようとする課題】上記従来の接地開閉器
においては、可動接触子２１が断路位置にあるときに
は、電源側固定接触部２２と負荷側固定接触部２３との
間の中間に位置しているので、可動接触子２１の先端部
が必然的に断路器４側に突出することになる。ところ
が、この断路位置では、断路器４の運転時や試験時の電
圧に耐えうる必要があるので、可動接触子２１の先端部
と断路器４との間に必要な絶縁距離を確保するために
は、可動接触子２１を断路器４から遠ざけなければなら
ず、この結果、スポットネットワーク受電設備が大形化
することになる。
【０００５】また、断路位置においては、可動接触子２
１と電源側固定接触部２２との絶縁距離、および可動接
触子２１と負荷側固定接触部２３との絶縁距離も必要と
なり、総合すると、可動接触子１と断路器４との絶縁距
離も含めて三箇所の絶縁距離を同時に確保しなければな
らない。このため、スポットネットワーク受電設備を縮
小化することができなかった。
【０００６】そこで本発明は、可動接触子を断路器に近
接して配置できるようにすることにより、スポットネッ
トワーク受電設備を縮小化できる接地開閉器を提供する
ことを目的とする。
【０００７】
【課題を解決するための手段】本発明では、断路器の電
源側に設けられた電源側固定接触部と、前記断路器の負
荷側に設けられた負荷側固定接触部と、前記断路器に対
向して回動可能に設けられた可動接触子とを備え、この
可動接触子が回動することにより、電源側固定接触部に
接触する位置、負荷側固定接触部に接触する位置および
これらのいずれにも接触しない断路位置の三位置でそれ
ぞれ停止する接地開閉器において、可動接触子は断路器
に対して電源側固定接触部および負荷側固定接触部より
も離れた位置に配設されるとともに、断路位置は電源側
固定接触部に対して負荷側固定接触部の外側に位置する
ように配設される。
【０００８】これにより、可動接触子の先端部は断路器
に対しては電源側固定接触部および負荷側固定接触部よ
りも遠い位置にあり、断路器に対しては必然的に所要の
絶縁距離が確保されることになる。したがって、可動接
触子は電源側固定接触部と負荷側固定接触部との二箇所
の絶縁距離を確保すればよいことになるので、スポット
ネットワーク受電設備の縮小化を図ることができる。
【０００９】
【発明の実施の形態】図１は本発明の接地開閉器の実施
の形態を示す斜視図で、図２はその単線結線図である。
これらの図において、容器８内には、三相の断路器４が
収納される。断路器４の電源側導体１４は絶縁支持物１
３によって容器８に支持されるとともに、電源側導体１
４には、容器８の側面に貫通封止状態に装着したケーブ
ルヘッド７を接続する。断路器４の負荷側導体１５は、
変圧器５の１次側端子に接続する。断路器４の電源側導
体１４および負荷側導体１５には、接地開閉器の電源側
固定接触部２および負荷側固定接触部３を各々接続す
る。
【００１０】接地開閉器の可動接触子１は、回動可能に
配設された連結軸１２に固着されて、断路器４に対して
電源側固定接触部２および負荷側固定接触部３よりも離
れた位置に配設される。また、可動接触子１は連結軸１
２の回動によって、その先端部が円弧を描くように駆動
され、電源側固定接触部２に接触する位置、負荷側固定
接触部３に接触する位置およびこれらのいずれにも接触
しない断路位置の三位置でそれぞれ停止するように形成
される。なお、この場合、断路位置は電源側固定接触部
２に対して負荷側固定接触部３の外側に位置するように
設定される。また、可動接触子１には摺動接触子９が接
続されており、接地導体１０および密封端子１１を介し
て、容器８の外部に導出されて接地される。
【００１１】かかる本発明の実施の形態による接地開閉
器は、図２に示すような断路器４の閉路状態において
は、可動接触子１は電源側固定接触部２および負荷側固
定接触部３のいずれにも接触しない断路位置にある。こ
の断路位置では、可動接触子１の先端部は電源側固定接
触部２に対して負荷側固定接触部３の外側に位置してい
るので、断路器４に対しては、電源側固定接触部２およ
び負荷側固定接触部３よりも遠い位置にあり、断路器４
に対しては必然的に所要の絶縁距離が確保されることに
なる。
【００１２】接地操作を行う場合には、図２に示す状態
で、断路器４を開路する。図１はこの状態を示してお
り、この状態で連結軸１２を矢印Ａ方向に回動すれば、
可動接触子１が連結軸１２と一体に回動して、その先端
部が負荷側固定接触部３に接触して停止し、負荷側導体
１５が接地される。この後、さらに連結軸１２を矢印Ａ
方向に回動すれば、可動接触子１の先端部が電源側固定
接触部２に接触して停止し、電源側導体１４が接地され
る。この状態からもとの断路位置にするには、連結軸１
２を矢印Ｂ方向に回動すれば、可動接触子１は負荷側固
定接触部３との接触位置を経由して、断路位置に戻る。
【００１３】なお、本発明の接地開閉器においては、断
路位置は電源側固定接触部２に対して負荷側固定接触部
３の外側に位置するように設定することが必要である
が、これは電源側が活線状態の時に、負荷側を接地する
ことが必要となる場合があるからである。
【００１４】
【発明の効果】本発明によれば、可動接触子が断路器に
対して電源側固定接触部および負荷側固定接触部よりも
離れた位置に配設されるとともに、断路位置は電源側固
定接触部に対して負荷側固定接触部の外側に位置するの
で、可動接触子の先端部は断路器に対しては電源側固定
接触部および負荷側固定接触部よりも遠い位置にあり、
断路器に対しては必然的に所要の絶縁距離が確保される
ことになる。したがって、可動接触子は電源側固定接触
部と負荷側固定接触部との二箇所の絶縁距離を確保すれ
ばよいことになるので、スポットネットワーク受電設備
の縮小化を図ることができる。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grounding switch used for spot network power receiving equipment and the like. 2. Description of the Related Art In general, a grounding switch used in a spot network power receiving equipment or the like is separated from a position where a movable contact grounds a power supply side, a position where a load side is grounded, and both. It is configured to stop at three disconnection positions. FIG. 3 is a single-line diagram showing an example of this type of conventional earthing switch. A disconnecting switch 4 is provided between a power supply side to which the cable head 7 is connected and a load side to which the transformer 5 is connected.
Is provided. The earthing switch arranged opposite to the disconnector 4 includes a power supply-side fixed contact portion 22 provided on the power supply side of the disconnector 4 and a load-side fixed contact portion 23 provided on the load side of the disconnector 4. And a movable contact 21 provided rotatably. Reference numeral 6 denotes a power detection device. In such a grounding switch, when the disconnector 4 is closed as shown in FIG. 3, the movable contact 21 has a power supply side fixed contact portion 22 and a load side fixed contact portion. 23, which is located at a disconnection position that does not contact any of the power-side fixed contact portion 22 and the load-side fixed contact portion 23, and includes the disconnector 4, the power-side fixed contact portion 22, and the load-side fixed contact portion. 23
Maintain the required insulation distance. In the case of performing the grounding operation, after the disconnector 4 is opened, the movable contact 21 is turned to contact the power supply side fixed contact portion 22 and stopped, so that the power supply side is grounded. Further, if the movable contact 21 is rotated in the reverse direction to contact the load-side fixed contact portion 23 and stop, the load side is grounded. In the above-mentioned conventional earthing switch, when the movable contact 21 is at the disconnection position, an intermediate point between the power supply side fixed contact portion 22 and the load side fixed contact portion 23 is provided. , The tip of the movable contact 21 necessarily projects to the disconnector 4 side. However, in this disconnection position, it is necessary to withstand the voltage during the operation of the disconnector 4 and the voltage at the time of the test. Therefore, in order to secure a necessary insulation distance between the distal end of the movable contact 21 and the disconnector 4. Must move the movable contact 21 away from the disconnector 4, and as a result, the spot network power receiving equipment becomes large. In the disconnecting position, the movable contact 2
Also, the insulation distance between the movable contact 1 and the power supply-side fixed contact portion 22 and the insulation distance between the movable contact 21 and the load-side fixed contact portion 23 are required. Three insulation distances at the same time. For this reason, the spot network power receiving equipment could not be reduced in size. Accordingly, an object of the present invention is to provide a grounding switch capable of reducing the size of a spot network power receiving equipment by enabling a movable contact to be arranged close to a disconnector. According to the present invention, there is provided a power supply-side fixed contact provided on a power supply side of a disconnector, a load-side fixed contact provided on a load side of the disconnector, A movable contact that is rotatably provided opposite to the disconnector, and the movable contact rotates to contact a power-side fixed contact portion and a load-side fixed contact portion. In addition, in the earthing switch which stops at the three positions of the disconnection positions that do not contact any of these, the movable contact is disposed at a position further away from the power supply side fixed contact portion and the load side fixed contact portion with respect to the disconnector. In addition, the disconnection position is disposed so as to be located outside the load-side fixed contact portion with respect to the power supply-side fixed contact portion. Accordingly, the distal end of the movable contact is located farther from the disconnecting device than the fixed contact portion on the power supply side and the fixed contact portion on the load side. Will be secured. Therefore, the movable contact only needs to secure two insulation distances between the power supply-side fixed contact portion and the load-side fixed contact portion, so that the spot network power receiving equipment can be reduced in size. FIG. 1 is a perspective view showing an embodiment of a grounding switch according to the present invention, and FIG. 2 is a single-line diagram thereof.
In these figures, a three-phase disconnector 4 is housed in a container 8. The power supply side conductor 14 of the disconnector 4 is the insulating support 1
3 and the power supply side conductor 1
4 is connected to a cable head 7 mounted on the side surface of the container 8 in a through-sealed state. The load-side conductor 15 of the disconnector 4 is
Connect to primary terminal of transformer 5. The power supply side fixed contact 2 and the load side fixed contact 3 of the earthing switch are connected to the power supply side conductor 14 and the load side conductor 15 of the disconnecting switch 4, respectively. The movable contact 1 of the earthing switch is fixed to a rotatably disposed connecting shaft 12, and is located closer to the disconnector 4 than the fixed contact 2 on the power supply side and the fixed contact 3 on the load side. It is located at a remote location. Further, the movable contact 1 is a connecting shaft 1
With the rotation of 2, the tip is driven so as to draw an arc, and a position where it contacts the power supply side fixed contact portion 2, a position where it contacts the load side fixed contact portion 3, and a disconnection position where it does not contact any of them. It is formed to stop at each of the three positions. In this case, the disconnection position is set so as to be located outside the power-side fixed contact portion 2 and the load-side fixed contact portion 3. Further, a sliding contact 9 is connected to the movable contact 1 and is led out of the container 8 via a ground conductor 10 and a sealing terminal 11 and grounded. In the earthing switch according to the embodiment of the present invention, when the disconnecting switch 4 is closed as shown in FIG. 2, the movable contact 1 is connected to the power supply fixed contact 2 and the load fixed contact 3. It is in the disconnection position that does not touch any of them. In this disconnection position, the distal end of the movable contact 1 is located outside the load-side fixed contact portion 3 with respect to the power supply-side fixed contact portion 2. 2 and a position farther than the fixed contact 3 on the load side,
Inevitably, a required insulation distance is secured. When the grounding operation is performed, the disconnector 4 is opened in the state shown in FIG. FIG. 1 shows this state. In this state, if the connecting shaft 12 is rotated in the direction of arrow A,
The movable contact 1 rotates integrally with the connecting shaft 12, and its tip contacts the load-side fixed contact portion 3 and stops, and the load-side conductor 15 is grounded. Thereafter, the connecting shaft 12 is further moved by the arrow A.
When the movable contact 1 is rotated in the direction, the tip of the movable contact 1 comes into contact with the power-supply-side fixed contact portion 2 and stops, and the power-supply-side conductor 14 is grounded. To return to the original disconnection position from this state, the connecting shaft 1
2 is rotated in the direction of arrow B, the movable contact 1 returns to the disconnection position via the contact position with the load-side fixed contact portion 3. In the earthing switch of the present invention, it is necessary to set the disconnection position so as to be located outside the load side fixed contact portion 3 with respect to the power source side fixed contact portion 2. This is because it may be necessary to ground the load side when the power supply side is in a live state. According to the present invention, the movable contact is disposed at a position farther from the disconnecting device than the power supply-side fixed contact portion and the load-side fixed contact portion. Since it is located outside the load-side fixed contact with respect to the side fixed contact, the tip of the movable contact is located farther from the disconnector than the power-side fixed contact and the load-side fixed contact,
The required insulation distance is inevitably secured for the disconnector. Therefore, the movable contact only needs to secure two insulation distances between the power supply-side fixed contact portion and the load-side fixed contact portion, so that the spot network power receiving equipment can be reduced in size.
【図面の簡単な説明】
【図１】本発明の接地開閉器の実施の形態の一例を示す
斜視図である。。
【図２】その単線結線図である。
【図３】従来の接地開閉器の一例を示す単線結線図であ
る。
【符号の説明】
１ 可動接触子
２ 電源側固定接触部
３ 負荷側固定接触部
４ 断路器
７ ケーブルヘッド
８ 容器
９ 摺動接触部
１０ 接地導体
１１ 密封端子
１２ 連結軸
１３ 絶縁支持物
１４ 電源側導体
１５ 負荷側導体BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an example of an embodiment of a grounding switch according to the present invention. . FIG. 2 is a single-line diagram thereof. FIG. 3 is a single-line diagram showing an example of a conventional ground switch. [Description of Signs] 1 Movable contact 2 Power-side fixed contact 3 Load-side fixed contact 4 Disconnector 7 Cable head 8 Container 9 Sliding contact 10 Ground conductor 11 Sealed terminal 12 Connecting shaft 13 Insulating support 14 Power supply side Conductor 15 Load side conductor
Claims (1)
触部と、前記断路器の負荷側に設けられた負荷側固定接
触部と、前記断路器に対向して回動可能に設けられた可
動接触子とを備え、この可動接触子が回動することによ
り、前記電源側固定接触部に接触する位置、前記負荷側
固定接触部に接触する位置およびこれらのいずれにも接
触しない断路位置の三位置でそれぞれ停止する接地開閉
器において、 前記可動接触子は前記断路器に対して前記電源側固定接
触部および前記負荷側固定接触部よりも離れた位置に配
設されるとともに、 前記断路位置は前記電源側固定接触部に対して前記負荷
側固定接触部の外側に位置するようにした、 ことを特徴とする接地開閉器。(57) Claims 1. A power supply side fixed contact portion provided on a power supply side of a disconnector, a load side fixed contact portion provided on a load side of the disconnector, and the disconnector A movable contact that is rotatably provided to face the power supply-side fixed contact portion, and a position that contacts the load-side fixed contact portion by rotating the movable contact. And a grounding switch that stops at each of three disconnection positions that do not contact any of them, wherein the movable contact is more distant from the disconnector than the power supply side fixed contact portion and the load side fixed contact portion. And a grounding switch, wherein the disconnection position is located outside the load-side fixed contact portion with respect to the power-source-side fixed contact portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17729096A JP3398949B2 (en) | 1996-06-18 | 1996-06-18 | Ground switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17729096A JP3398949B2 (en) | 1996-06-18 | 1996-06-18 | Ground switch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH1014022A JPH1014022A (en) | 1998-01-16 |
| JP3398949B2 true JP3398949B2 (en) | 2003-04-21 |
Family
ID=16028441
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17729096A Expired - Fee Related JP3398949B2 (en) | 1996-06-18 | 1996-06-18 | Ground switch |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3398949B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103077844B (en) * | 2012-12-28 | 2015-05-20 | 安徽鑫龙电器股份有限公司 | Switch cabinet earthing switch main shaft operating mechanism |
| CN117038374B (en) * | 2023-09-28 | 2023-12-08 | 广东米勒电气有限公司 | Double-station grounding switch with function of rapidly closing short-circuit fault current |
-
1996
- 1996-06-18 JP JP17729096A patent/JP3398949B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH1014022A (en) | 1998-01-16 |
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