JPH10178710A - Dc circuit breaker - Google Patents
Dc circuit breakerInfo
- Publication number
- JPH10178710A JPH10178710A JP35369796A JP35369796A JPH10178710A JP H10178710 A JPH10178710 A JP H10178710A JP 35369796 A JP35369796 A JP 35369796A JP 35369796 A JP35369796 A JP 35369796A JP H10178710 A JPH10178710 A JP H10178710A
- Authority
- JP
- Japan
- Prior art keywords
- circuit breaker
- discharge
- disconnector
- breaker
- circuit
- 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.)
- Granted
Links
Landscapes
- Trip Switchboards (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、転流式の直流遮
断装置に関し、詳しくは保守点検時に転流コンデンサの
残留電荷を放電させる手段に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a commutation type DC cutoff device, and more particularly, to a means for discharging residual charge of a commutation capacitor during maintenance and inspection.
【０００２】[0002]
【従来の技術】直流回路の遮断は、交流回路のように電
流が自然に零値にならないことから、強制的に電流零点
を形成して消弧を図らなければならないが、その方式と
して遮断時にコンデンサの放電電流を主回路電流と逆の
方向に流す転流式直流遮断が知られている。図９に上記
方式の従来の回路構成を示す。図９において、直流電源
１から断路器２及び引出形の直流遮断器３（以下、単に
遮断器という）を通して負荷４に給電される。直流遮断
器３は支持枠５に水平引出し可能に支持され、その両端
は主回路断路部６を介して主回路に接続されている。遮
断器３の両端には転流回路断路部７を介して転流回路８
が接続され、転流回路８には遮断器３の運転中図示しな
い別電源により充電される転流コンデンサ（以下、単に
コンデンサという）９と転流スイッチ１０とが設けられ
ている。このような回路構成において、電流遮断時に転
流スイッチ１０をオンすると、コンデンサ９の放電電流
が主回路電流と逆方向に遮断器３に流れ、強制的に電流
零点が形成される。2. Description of the Related Art A DC circuit is interrupted by forcibly extinguishing an arc by forming a current zero point because the current does not naturally become zero as in an AC circuit. A commutation type DC cutoff in which a discharge current of a capacitor flows in a direction opposite to a main circuit current is known. FIG. 9 shows a conventional circuit configuration of the above method. In FIG. 9, power is supplied from a DC power supply 1 to a load 4 through a disconnector 2 and a draw-out type DC breaker 3 (hereinafter simply referred to as a breaker). The DC circuit breaker 3 is supported by a support frame 5 so as to be able to be pulled out horizontally, and both ends thereof are connected to a main circuit via a main circuit disconnecting section 6. A commutation circuit 8 is connected to both ends of the circuit breaker 3 through a commutation circuit disconnecting section 7.
The commutation circuit 8 is provided with a commutation capacitor (hereinafter simply referred to as a capacitor) 9 and a commutation switch 10 that are charged by a separate power supply (not shown) during operation of the circuit breaker 3. In such a circuit configuration, when the commutation switch 10 is turned on at the time of current interruption, the discharge current of the capacitor 9 flows through the circuit breaker 3 in a direction opposite to the main circuit current, and a current zero is forcibly formed.
【０００３】上記直流遮断装置の保守点検時には、遮断
器３を引き出して断路部６，７を開路するが、その際に
はコンデンサ９の残留電荷を消滅させる必要がある。そ
こで従来は断路器２を開路した後、運転位置の遮断器３
を閉路して転流スイッチ１０をオンし、コンデンサ９の
両端を短絡して残留電荷を放電させていた。At the time of maintenance and inspection of the DC cutoff device, the circuit breaker 3 is pulled out to open the disconnecting portions 6 and 7. In this case, it is necessary to eliminate the residual charge of the capacitor 9. Therefore, conventionally, after the disconnector 2 is opened, the circuit breaker 3 in the operating position is opened.
, The commutation switch 10 is turned on, and both ends of the capacitor 9 are short-circuited to discharge the residual charge.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、このよ
うな従来の残留電荷の放電は、遮断器を引き出した状態
では放電回路が形成されないため、遮断器の試験位置で
のコンデンサの放電を担保することができず安全上問題
があった。また、その対策として、図９に破線で示すよ
うに放電スイッチ１１を別途接続し、遮断器を引き出し
た状態でも放電スイッチ１１をオンして放電を可能とし
たものもあるが、そのための専用回路が必要となるとと
もに、転流コンデンサの短絡状態が遮断器部から確認で
きず、放電スイッチ１１をオフしたまま遮断器を引き出
してしまう危険があった。この発明の課題は、遮断器の
試験位置でコンデンサを確実に放電状態とすることにあ
る。However, in such conventional discharge of residual charges, a discharge circuit is not formed when the circuit breaker is pulled out, so that the discharge of the capacitor at the test position of the circuit breaker is ensured. And there was a safety problem. As a countermeasure, a discharge switch 11 is separately connected as shown by a dashed line in FIG. 9 and the discharge switch 11 is turned on even in a state where the circuit breaker is pulled out to enable discharge. And the short circuit state of the commutation capacitor cannot be confirmed from the circuit breaker part, and there is a danger that the circuit breaker will be pulled out with the discharge switch 11 turned off. An object of the present invention is to reliably discharge a capacitor at a test position of a circuit breaker.
【０００５】[0005]
【課題を解決するための手段】この発明は、遮断器を水
平引出し可能に支持する支持枠内にコンデンサの両端を
短絡する放電断路器を設け、この放電断路器を遮断器正
面から開閉操作可能に構成するものとする。コンデンサ
短絡用の放電断路器を遮断器支持枠内に設けることによ
り、遮断器を支持枠から引き出した状態でコンデンサを
短絡できるとともに、遮断器正面から開閉操作可能とす
ることにより開閉状態の視認性が高くなり、短絡の有無
を容易に確認できる。According to the present invention, a discharge disconnector for short-circuiting both ends of a capacitor is provided in a support frame for supporting a circuit breaker so that it can be pulled out horizontally, and the discharge disconnector can be opened and closed from the front of the circuit breaker. It shall be comprised in. By installing a discharge disconnector for short-circuiting the capacitor in the circuit breaker support frame, the capacitor can be short-circuited with the circuit breaker pulled out from the support frame, and the open / close state of the circuit breaker can be opened and closed by operating the circuit breaker from the front. And the presence or absence of a short circuit can be easily confirmed.
【０００６】上記直流遮断装置には、以下の鎖錠機構
（インターロック機構）を設けるのがよい。まず、遮断
器の運転位置において放電断路器を開状態にロックする
とともに、直流遮断器の主回路が断路する中間位置にお
いて放電断路器を開閉操作可能とする鎖錠機構を設ける
ものとする。放電断路器を閉路したまま遮断器を運転す
ると、電流遮断時にコンデンサの放電電流が短絡され、
本来の機能が果たせなくなる。従って、遮断器運転位置
では放電断路器を開状態にロックするとともに、この放
電断路器は主回路断路部が切り離される中間位置（運転
位置と試験位置との間の位置）まで引き出された状態で
はじめて閉操作可能とする。[0006] The DC blocking device is preferably provided with the following locking mechanism (interlock mechanism). First, a lock mechanism that locks the discharge disconnector in an open state at the operating position of the circuit breaker and that can open and close the discharge disconnector at an intermediate position where the main circuit of the DC circuit breaker is disconnected is provided. If the circuit breaker is operated with the discharge disconnector closed, the discharge current of the capacitor will be short-circuited when the current is interrupted,
The original function cannot be performed. Therefore, in the breaker operating position, the discharge disconnector is locked in the open state, and the discharge disconnector is pulled out to the intermediate position (the position between the operating position and the test position) where the main circuit disconnecting portion is cut off. The closing operation is enabled for the first time.
【０００７】次に、放電断路器の開状態で直流遮断器の
中間位置から試験位置への引出しを禁止するとともに試
験位置において放電断路器を閉状態にロックする鎖錠機
構を設けるものとする。中間位置で閉操作可能とした放
電断路器は、閉操作しなければ試験位置へ引き出せない
ようにし、遮断器の試験位置では放電断路器が閉路して
コンデンサの残留電荷が放電されていることを担保する
とともに、放電断路器がみだりに開操作されないように
する。[0007] Next, it is assumed that a lock mechanism is provided that prohibits drawing out of the DC breaker from the intermediate position to the test position when the discharge disconnector is open and locks the discharge disconnector in the closed position at the test position. Discharge disconnectors that can be closed at the intermediate position must not be pulled out to the test position unless they are closed, and at the test position of the circuit breaker, make sure that the discharge disconnector is closed and the residual charge of the capacitor is discharged. Secure and ensure that the discharge disconnector is not accidentally opened.
【０００８】更に、放電断路器の閉状態で直流遮断器の
中間位置から運転位置への挿入を禁止する鎖錠機構を設
けるものとする。これにより、保守点検終了後に放電断
路器が開操作されることなく遮断器が運転位置に挿入さ
れ、そのまま運転に入ることを防止する。Further, a locking mechanism for inhibiting insertion of the DC breaker from the intermediate position to the operating position when the discharge disconnector is closed is provided. This prevents the circuit breaker from being inserted into the operation position without opening the discharge disconnector after the maintenance and inspection is completed, thereby preventing the operation from starting as it is.
【０００９】[0009]
【発明の実施の形態】以下、図１〜図８に基づいてこの
発明の実施の形態を説明する。なお、従来例と対応する
部分には同一の符号を用いるものとする。まず、図１は
回路構成を示すものである。図１において、遮断器３を
水平引出し可能に支持する支持枠５内には、コンデンサ
９の両端を短絡する放電断路器１２が設けられ、この放
電断路器１２は後述するように遮断器３の正面から開閉
操作可能に構成されている。その他の構成は図９の従来
構成と同じである。遮断器３の運転中は放電断路器１２
は開路しており、電流遮断時にコンデンサ９の遮断器３
に対する放電作用は図９の従来構成と同じである。直流
遮断装置の保守点検時には、放電断路器１２を閉路して
転流スイッチ１０をオンすることにより、コンデンサ９
の両端を短絡して残留電荷を残留電荷を放電させる。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. Note that the same reference numerals are used for the portions corresponding to the conventional example. First, FIG. 1 shows a circuit configuration. In FIG. 1, a discharge disconnector 12 that short-circuits both ends of a capacitor 9 is provided in a support frame 5 that supports the circuit breaker 3 so that the circuit breaker 3 can be pulled out horizontally. It is configured to be able to open and close from the front. Other configurations are the same as the conventional configuration of FIG. While the circuit breaker 3 is operating, the discharge disconnector 12
Is open and the circuit breaker 3
Is the same as that of the conventional configuration shown in FIG. At the time of maintenance and inspection of the DC cutoff device, by closing the discharge disconnecting switch 12 and turning on the commutation switch 10, the capacitor 9 is turned off.
Is short-circuited at both ends to discharge the residual charges.
【００１０】図２〜図４は直流遮断装置を示し、図２は
側面図、図３は正面図、図４は背面図である。また、図
５は遮断器の拡大側面図、図６はその正面図である。こ
れらの図において、支持枠５は直立した方形の枠体１３
とその下端部から前方に延び出す支持板１４とからなる
Ｌ字状に形成され、支持板１４は左右両側が上方に折り
曲げられている。枠体１３の背面には上下一対のＬ形材
１５が左右に渡るように固定され、その間に正負両極の
主回路断路部６の固定接触片１６が支持碍子１７を介し
て左右に並べて取り付けられている。固定接触片１６は
直立配置された板導体からなり、各極ごとに左右２枚ず
つ設けられている。2 to 4 show a DC cutoff device, FIG. 2 is a side view, FIG. 3 is a front view, and FIG. 4 is a rear view. FIG. 5 is an enlarged side view of the circuit breaker, and FIG. 6 is a front view thereof. In these figures, the support frame 5 is an upright rectangular frame 13
And a support plate 14 extending forward from the lower end thereof, and is formed in an L-shape, and the left and right sides of the support plate 14 are bent upward. A pair of upper and lower L-shaped members 15 are fixed to the rear surface of the frame body 13 so as to extend to the left and right, and fixed contact pieces 16 of the main circuit disconnecting portion 6 of both positive and negative polarities are mounted side by side via support insulators 17 therebetween. ing. The fixed contact pieces 16 are made of plate conductors arranged upright, and two fixed contact pieces are provided for each pole.
【００１１】また、枠体１３の背面には主回路断路部６
の下方に、板材１８が左右に渡るように固定され、この
板材１８を貫通して正負両極の転流回路断路部７の固定
接触片１９を保持したブッシング２０が左右に並べて取
り付けられている。固定接触片１９は水平配置された帯
導体からなり、その背面側の突出端には直交するように
放電断路器１２の板導体からなる固定接触子２１が接合
されている。固定接触子２１は転流回路８（図１）の接
続端子を兼ねており、左右の固定接触子２１にはコンデ
ンサ９の両端が接続される。The main circuit disconnecting portion 6 is provided on the back of the frame 13.
A bushing 20 is fixed to the left and right of the commutation circuit disconnecting portion 7 of both the positive and negative poles and penetrates through the plate 18 under the right and left. The fixed contact piece 19 is made of a horizontally arranged band conductor, and a fixed contact 21 made of a plate conductor of the discharge disconnector 12 is joined to the protruding end on the back side thereof so as to be orthogonal. The fixed contact 21 also serves as a connection terminal of the commutation circuit 8 (FIG. 1), and both ends of the capacitor 9 are connected to the left and right fixed contacts 21.
【００１２】一方、遮断器３は左右４個の車輪２２を介
して、支持板１４上に前後方向（図２の左右方向）に水
平引出し可能に支持されている。遮断器３の開閉部は真
空バルブ２３により構成され、また真空バルブ２３は左
右に２本並立して、電気的には直列に設けられている。
これらの真空バルブ２３はその下部端子同士が導体２４
により互いに接続され、電流は一方の真空バルブ２３を
上部端子から下部端子に流れ、導体２４を経て他方の真
空バルブ２３の下部端子から上部端子に流れる。そし
て、２本の真空バルブ２３の各上部端子には導体２５を
介して主回路断路部６の可動接触片２６が設けられてい
る。可動接触片２６は上下に配列された複数対の接触フ
ィンガからなり、固定接触片１６に対応して各極ごとに
左右２組設けられ、図２の遮断器運転位置において、接
触フィンガで固定接触片１６を挟んで主回路を閉路す
る。On the other hand, the circuit breaker 3 is supported on the support plate 14 via four wheels 22 on the left and right sides so as to be able to be pulled out horizontally in the front-rear direction (the left-right direction in FIG. 2). The opening / closing part of the circuit breaker 3 is constituted by a vacuum valve 23, and two vacuum valves 23 are provided side by side on the left and right, and electrically provided in series.
These vacuum valves 23 have lower terminals connected to conductors 24.
, The current flows through one of the vacuum valves 23 from the upper terminal to the lower terminal, and flows through the conductor 24 from the lower terminal of the other vacuum valve 23 to the upper terminal. Each of the upper terminals of the two vacuum valves 23 is provided with a movable contact piece 26 of the main circuit disconnecting section 6 via a conductor 25. The movable contact piece 26 is composed of a plurality of pairs of contact fingers arranged vertically, and two sets of right and left are provided for each pole corresponding to the fixed contact piece 16. In the breaker operating position of FIG. The main circuit is closed with the piece 16 interposed therebetween.
【００１３】更に、一方（例えば図２の紙面の手前側）
の真空バルブ２３の下部端子側から背面側に水平に延び
出すように導体２７が接続され、また他方（例えば図２
の紙面の奥側）の上部端子側から下降して導体２７と同
レベルで背面側に水平に延び出すように導体２８が接続
され、これらの導体２７及び２８の先端には転流回路断
路部７の可動接触片２９が設けられている。導体２７及
び２８の突出端は碍子４０により支持されている。可動
接触片２９は図５に示すように、上下で対をなす接触フ
インガからなり、図２の遮断器運転位置において、接触
フィンガで固定接触片１９を挟んで転流回路を閉路す
る。Furthermore, one side (for example, the front side of the paper surface of FIG. 2)
A conductor 27 is connected so as to extend horizontally from the lower terminal side to the back side of the vacuum valve 23, and the other (for example, FIG.
A conductor 28 is connected so as to descend from the upper terminal side (rear side of the paper surface) and extend horizontally to the rear side at the same level as the conductor 27, and the ends of these conductors 27 and 28 are commutation circuit disconnecting portions. 7 movable contact pieces 29 are provided. The protruding ends of the conductors 27 and 28 are supported by insulators 40. As shown in FIG. 5, the movable contact piece 29 is composed of a pair of upper and lower contact fingers, and closes the commutation circuit with the fixed contact piece 19 sandwiched between the contact fingers in the circuit breaker operating position of FIG.
【００１４】放電断路器１２のすでに述べた固定接触子
２１と接離する可動接触子３０は絶縁レバー３１を介し
て丸棒からなる操作ロッド３２の一端に取り付けられて
いる。操作ロッド３２は支持板１４の上面に沿って前後
方向にに配置され、支持板１４上の３箇所及び枠体１３
の背後まで延長されたその底板上の１箇所に設けられた
軸受３３に回動可能に支持されている。図７に操作ロッ
ド３２の可動接触子側の端部を拡大して示す。図７にお
いて、軸受３３はＵ字状溝を持つＬ形金具３３ａと逆Ｕ
字状溝を持つ押え金具３３ｂとからなり、操作ロッド３
２はねじで固定されたＬ形金具３３ａのＵ字状溝に支承
され、逆Ｕ字状溝を介して上から嵌め込まれてＬ形金具
３３ａにねじで固定された押え金具３３ｂにより保持さ
れている。可動接触子３０は固定接触子２１を前後から
挟む三角形状（図４参照）の２枚の導電板からなり、絶
縁レバー３１の両面にねじで固定されている。The movable contact 30 which comes into contact with and separates from the fixed contact 21 of the discharge disconnector 12 is attached to one end of an operating rod 32 made of a round bar via an insulating lever 31. The operation rods 32 are arranged in the front-rear direction along the upper surface of the support plate 14, and are disposed at three positions on the support plate 14 and the frame 13.
Is supported rotatably by a bearing 33 provided at one place on the bottom plate extending to the back of the bottom plate. FIG. 7 shows an enlarged end of the operation rod 32 on the movable contactor side. In FIG. 7, the bearing 33 has an L-shaped bracket 33a having a U-shaped groove and a reverse U-shaped bracket.
The holding rod 33b has a U-shaped groove.
Numeral 2 is supported by a U-shaped groove of an L-shaped bracket 33a fixed with a screw, is fitted from above through an inverted U-shaped groove, and is held by a holding bracket 33b fixed to the L-shaped bracket 33a with a screw. I have. The movable contact 30 is composed of two triangular (see FIG. 4) conductive plates sandwiching the fixed contact 21 from the front and rear, and is fixed to both surfaces of the insulating lever 31 with screws.
【００１５】上述構成の放電断路器１２は、遮断器３の
正面側（図２の左側）に位置する端部に装着されたハン
ドル３４を介して４５度の範囲で回動操作され、図４の
実線位置で左右の固定接触子２１を橋絡し、コンデンサ
９の両端を短絡する。また、図４の破線位置で固定接触
子２１間を開路する。The discharge disconnecting switch 12 having the above-described structure is rotated in a range of 45 degrees through a handle 34 attached to an end located on the front side (the left side in FIG. 2) of the circuit breaker 3, and FIG. The left and right fixed contacts 21 are bridged at the solid line position, and both ends of the capacitor 9 are short-circuited. Further, the circuit between the fixed contacts 21 is opened at the broken line position in FIG.
【００１６】放電断路器１２には鎖錠機構が設けられて
いる。以下、図２、図３及び図８により、この鎖錠機構
について説明する。なお、図８において、（Ａ）は鎖錠
機構の正面図、（Ｂ）はその側面図を示し、また〜
の区分は遮断器３の引出位置に応じた放電断路器１２の
操作区分を示している。さて、鎖錠機構は遮断器３の底
面に沿って固定された方形の板体からなるストッパ３５
と操作ロッド３２に前後２箇所に固定された干渉レバー
３６及び３７とからなっている。図８において、ストッ
パ３５は遮断器３の背面側に寄せて固定され、干渉レバ
ー３６はの遮断器運転位置においてストッパ３５と重
なる位置に、また干渉レバー３７は干渉レバー３６の前
方に、ストッパ３５の前後方向（図８（Ｂ）の左右方
向）の長さ寸法よりやや大きい間隔を置いて操作ロッド
３２に固定されている。The discharge disconnecting switch 12 is provided with a locking mechanism. Hereinafter, this locking mechanism will be described with reference to FIGS. 2, 3, and 8. 8, (A) shows a front view of the locking mechanism, (B) shows a side view thereof, and
Indicate the operation division of the discharge disconnector 12 according to the position where the circuit breaker 3 is pulled out. The locking mechanism is a stopper 35 formed of a rectangular plate fixed along the bottom surface of the circuit breaker 3.
And interference levers 36 and 37 fixed to the front and rear two places on the operation rod 32. 8, the stopper 35 is fixed to the back side of the circuit breaker 3, and the interference lever 36 is located at a position overlapping the stopper 35 in the circuit breaker operating position, and the interference lever 37 is located in front of the interference lever 36. Are fixed to the operation rod 32 at intervals slightly larger than the length in the front-rear direction (the left-right direction in FIG. 8B).
【００１７】図８（Ａ）において、干渉レバー３６，３
７は短冊状の板材からなり、先端部両角が面取りされ、
の放電断路器１２の閉状態で干渉レバー３６が正面か
ら見て左４５度に傾斜し、干渉レバー３７は直立するよ
うに設定され、また干渉レバー３６，３７の先端部は傾
斜状態ではストッパ３５の下面より下がり、垂直状態で
はストッパ３５の前端面と重なるように設定されてい
る。そして、支持板１４上には上記角度位置を規制する
ために、正面から見て干渉レバー３６の右側及び干渉レ
バー３７の左側に、角柱材からなる回り止め３８及び３
９が直立して固定されている。In FIG. 8A, the interference levers 36, 3
7 is made of a strip-shaped plate material, and both ends are chamfered,
When the discharge disconnector 12 is closed, the interference lever 36 is tilted 45 degrees to the left as viewed from the front, and the interference lever 37 is set to stand upright. Is set to be lower than the lower surface of the stopper 35 and overlap the front end surface of the stopper 35 in the vertical state. Then, on the support plate 14, in order to regulate the above-mentioned angular position, detents 38 and 3 made of prismatic material are provided on the right side of the interference lever 36 and the left side of the interference lever 37 when viewed from the front.
9 is upright and fixed.
【００１８】このような構成において、図８のは遮断
器３が運転位置にあり、放電断路器１２は開状態にあ
る。この状態から操作ロッド３２を時計方向に４５度回
動すると放電断路器１２は閉路するが、この状態では干
渉レバー３６がストッパ３５の底面に当たって回動でき
ない。すなわち、遮断器３の運転位置においては、放電
断路器１２は開状態にロックされる。なお、反時計方向
の回動は干渉レバー３７が回り止め３９に当たることに
より規制されている。In such a configuration, FIG. 8 shows the circuit breaker 3 in the operating position and the discharge disconnector 12 in the open state. When the operating rod 32 is rotated 45 degrees clockwise from this state, the discharge disconnector 12 is closed, but in this state, the interference lever 36 hits the bottom surface of the stopper 35 and cannot be rotated. That is, in the operating position of the circuit breaker 3, the discharge disconnector 12 is locked in the open state. The rotation in the counterclockwise direction is restricted by the interference lever 37 hitting the detent 39.
【００１９】図８のは、遮断器３をストッパ３５が干
渉レバー３６と３７の間に来る位置（中間位置）まで前
方に引き出した状態を示している。この位置で主回路断
路部６及び転流開路断路部７は断路する。この中間位置
においては、干渉レバー３６はストッパ３５から外れる
ため、操作ロッド３２を干渉レバー３６が回り止め３８
に当たるまで時計方向に回動して放電断路器１２を閉路
することが可能である。また、閉路した放電断路器１２
を操作ロッドを反時計方向に回動して開路することも可
能である。すなわち、主回路が断路する中間位置におい
ては、放電断路器１２の開閉操作が可能となる。ここ
で、図８のにおいて、放電断路器１２を閉路しないで
遮断器３を更に引き出そうとすると、ストッパ３５の前
端面が干渉レバー３７に当たり引出しができない。すな
わち、放電断路器１２の開状態での遮断器３の中間位置
から試験位置への引出しが禁止されている。FIG. 8 shows a state in which the circuit breaker 3 is pulled forward to a position (intermediate position) where the stopper 35 comes between the interference levers 36 and 37. At this position, the main circuit disconnecting portion 6 and the commutation open disconnecting portion 7 are disconnected. In this intermediate position, the interference lever 36 is disengaged from the stopper 35, so that the operation lever 32 is
, It is possible to close the discharge disconnector 12 by turning clockwise until it hits. In addition, the closed discharge disconnector 12
It is also possible to open the circuit by rotating the operation rod counterclockwise. That is, at the intermediate position where the main circuit is disconnected, the switching operation of the discharge disconnector 12 can be performed. Here, in FIG. 8, if the circuit breaker 3 is further pulled out without closing the discharge disconnector 12, the front end face of the stopper 35 hits the interference lever 37 and cannot be pulled out. That is, withdrawal of the circuit breaker 3 from the intermediate position to the test position in the open state of the discharge disconnector 12 is prohibited.
【００２０】中間位置で放電断路器１２を閉路した状態
が図８のである。この状態では干渉レバー３７がスト
ッパ３５の前端面から外れ、更に前方まで引き出すこと
が可能となる。図８のは放電断路器１２を閉路した
後、遮断器３を試験位置まで引き出した状態を示してい
る。なお、遮断器３の試験位置は図示しないストッパに
より規制される。この状態で転流スイッチ１０（図１）
をオンすることにより残留電荷を放電させることができ
る。図８のにおいて、操作ロッド３２を反時計方向
（開方向）に回動しようとすると、干渉レバー３７がス
トッパ３５の底面に当たって回動できない。すなわち、
遮断器３の試験位置においては、放電断路器１２は閉状
態にロックされる。なお、時計方向の回動は干渉レバー
３６が回り止め３８に当たることにより規制されてい
る。FIG. 8 shows a state in which the discharge disconnector 12 is closed at the intermediate position. In this state, the interference lever 37 is disengaged from the front end face of the stopper 35, and can be pulled further forward. FIG. 8 shows a state where the circuit breaker 3 is pulled out to the test position after the discharge disconnector 12 is closed. The test position of the circuit breaker 3 is regulated by a stopper (not shown). In this state, the commutation switch 10 (FIG. 1)
, The residual charges can be discharged. In FIG. 8, when the operation rod 32 is turned in the counterclockwise direction (opening direction), the interference lever 37 hits the bottom surface of the stopper 35 and cannot be turned. That is,
In the test position of the circuit breaker 3, the discharge disconnector 12 is locked in the closed state. The rotation in the clockwise direction is restricted by the interference lever 36 hitting the detent 38.
【００２１】遮断器３の保守点検終了後は上記と逆の順
序となり、運転位置からまず図８のの中間位置までい
ったん挿入する。この中間位置では干渉レバー３７はス
トッパ３５の下面から外れるため、放電断路器１２の開
操作が可能になる。しかし、この開操作を怠るとストッ
パ３５の後端面が干渉レバー３６に当たり、それ以上挿
入できない。すなわち、放電断路器１２の閉状態での遮
断器３の中間位置から運転位置への挿入が禁止されてい
る。そこで、放電断路器１２を開操作して図８のの状
態とし、その後、の運転位置まで挿入する。なお、上
述実施の形態では試験位置で転流スイッチをオンさせて
残留電荷の放電を行うようにしたが、中間位置で放電さ
せても問題はない。その場合、中間位置あるいは試験位
置に設けた位置検出スイッチにより、転流スイッチを自
動的にオンさせることが可能である。After the maintenance and inspection of the circuit breaker 3, the order is reversed, and the circuit breaker 3 is first inserted from the operating position to the intermediate position in FIG. At this intermediate position, the interference lever 37 comes off the lower surface of the stopper 35, so that the discharge disconnecting switch 12 can be opened. However, if this opening operation is neglected, the rear end face of the stopper 35 hits the interference lever 36 and cannot be inserted any further. That is, insertion of the circuit breaker 3 from the intermediate position to the operating position in the closed state of the discharge disconnector 12 is prohibited. Therefore, the discharge disconnecting switch 12 is opened to bring it into the state shown in FIG. In the above-described embodiment, the commutation switch is turned on at the test position to discharge the residual charges. However, there is no problem if the discharge is performed at the intermediate position. In that case, the commutation switch can be automatically turned on by the position detection switch provided at the intermediate position or the test position.
【００２２】[0022]
【発明の効果】以上の通り、この発明によれば、遮断器
支持枠内に正面から開閉操作可能な放電断路器を設ける
ことにより、遮断器引出し状態でコンデンサの残留電荷
の放電が可能となるとともに、コンデンサ短絡有無を容
易に確認できる。また、そのための専用回路も不要であ
る。更に、放電断路器に鎖錠機構を設けることにより、
放電断路器が閉状態のまま運転に入ることが回避される
とともに、試験位置においてはコンデンサを確実に短絡
状態として、転流スイッチのオンによりいつでも残留電
荷の放電を実行することができる。As described above, according to the present invention, by providing a discharge disconnecting switch which can be opened and closed from the front in the circuit breaker support frame, it becomes possible to discharge the residual charge of the capacitor when the circuit breaker is pulled out. At the same time, the presence or absence of a capacitor short can be easily confirmed. Further, a dedicated circuit for this is not required. Furthermore, by providing a lock mechanism in the discharge disconnector,
In addition to avoiding the operation with the discharge disconnector closed, the capacitor can be reliably short-circuited at the test position, and the discharge of the residual charge can be executed at any time by turning on the commutation switch.
【図１】この発明の実施の形態を示す回路構成図であ
る。FIG. 1 is a circuit configuration diagram showing an embodiment of the present invention.
【図２】この発明の実施の形態を示す直流遮断装置の側
面図である。FIG. 2 is a side view of the DC blocking device according to the embodiment of the present invention.
【図３】図２の正面図である。FIG. 3 is a front view of FIG. 2;
【図４】図２の背面図である。FIG. 4 is a rear view of FIG. 2;
【図５】図２における直流遮断器の拡大側面図である。FIG. 5 is an enlarged side view of the DC circuit breaker in FIG.
【図６】図５の正面図である。FIG. 6 is a front view of FIG. 5;
【図７】図２における放電断路器の要部拡大図である。FIG. 7 is an enlarged view of a main part of the discharge disconnector in FIG. 2;
【図８】遮断器の引出位置に応じた放電断路器の操作区
分を示す図で、（Ａ）は正面図、（Ｂ）は側面図であ
る。FIGS. 8A and 8B are diagrams showing operation sections of the discharge disconnector in accordance with the draw-out position of the circuit breaker, wherein FIG. 8A is a front view and FIG. 8B is a side view.
【図９】従来例を示す回路構成図である。FIG. 9 is a circuit configuration diagram showing a conventional example.
３ 直流遮断器 ５ 支持枠 ６ 主回路断路部 ７ 転流回路断路部 ８ 転流回路 ９ 転流コンデンサ １０ 転流スイッチ １２ 放電断路器 ２１ 固定接触子 ３０ 可動接触子 Reference Signs List 3 DC circuit breaker 5 Support frame 6 Main circuit disconnecting section 7 Commutating circuit disconnecting section 8 Commutating circuit 9 Commutating capacitor 10 Commutating switch 12 Discharge disconnecting switch 21 Fixed contact 30 Moving contact
Claims (4)
水平引出し可能に支持する支持枠と、電流遮断時に前記
直流遮断器に主回路電流と逆方向に放電電流を通流させ
る転流コンデンサとを有する直流遮断装置において、 前記直流遮断器の保守点検時に前記転流コンデンサの両
端を短絡する放電断路器を前記支持枠内に設け、この放
電断路器を前記直流遮断器の正面から開閉操作可能に構
成したことを特徴とする直流遮断装置。1. A drawer type DC circuit breaker, a support frame for supporting the DC circuit breaker so as to be able to be drawn out horizontally, and an inverter for passing a discharge current in a direction opposite to a main circuit current to the DC circuit breaker when current is interrupted. A DC disconnection device having a discharge capacitor, wherein a discharge disconnector that short-circuits both ends of the commutation capacitor during maintenance and inspection of the DC breaker is provided in the support frame, and the discharge disconnector is provided from the front of the DC breaker. A DC cutoff device characterized by being configured to be capable of opening and closing.
を開状態にロックするとともに、前記直流遮断器の主回
路が断路する中間位置において前記放電断路器を開閉操
作可能とする鎖錠機構を設けたことを特徴とする請求項
１記載の直流遮断装置。2. A locking mechanism for locking a discharge disconnector in an open state in an operation position of a DC circuit breaker and opening and closing the discharge disconnector in an intermediate position where a main circuit of the DC circuit breaker is disconnected. The direct current cutoff device according to claim 1, wherein the direct current cutoff device is provided.
置から試験位置への引出しを禁止するとともに前記試験
位置において前記放電断路器を閉状態にロックする鎖錠
機構を設けたことを特徴とする請求項２記載の直流遮断
装置。3. A lock mechanism for prohibiting the direct current circuit breaker from being pulled out from an intermediate position to a test position when the discharge disconnector is open and locking the discharge disconnector in a closed state at the test position is provided. 3. The direct current cutoff device according to claim 2, wherein:
置から運転位置への挿入を禁止する鎖錠機構を設けたこ
とを特徴とする請求項３記載の直流遮断装置。4. The DC cutoff device according to claim 3, further comprising a lock mechanism for inhibiting insertion of the DC breaker from the intermediate position to the operating position when the discharge disconnector is closed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP35369796A JP3815579B2 (en) | 1996-12-17 | 1996-12-17 | DC breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP35369796A JP3815579B2 (en) | 1996-12-17 | 1996-12-17 | DC breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10178710A true JPH10178710A (en) | 1998-06-30 |
| JP3815579B2 JP3815579B2 (en) | 2006-08-30 |
Family
ID=18432615
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP35369796A Expired - Lifetime JP3815579B2 (en) | 1996-12-17 | 1996-12-17 | DC breaker |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3815579B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000050431A (en) * | 1998-07-30 | 2000-02-18 | Hitachi Ltd | Distribution board for dc circuit |
| CN101814392A (en) * | 2009-02-19 | 2010-08-25 | 株式会社日立制作所 | Commutation type DC breaker |
| JP2015050900A (en) * | 2013-09-04 | 2015-03-16 | 富士電機株式会社 | Power conversion equipment and inspection stand |
| CN116525327A (en) * | 2023-05-06 | 2023-08-01 | 保定市冀中电力设备有限责任公司 | Secondary fusion on-column circuit breaker with protection type isolating switch |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117996620A (en) * | 2022-10-28 | 2024-05-07 | 施耐德电气工业公司 | DC circuit breaker handcart and DC switch equipment |
-
1996
- 1996-12-17 JP JP35369796A patent/JP3815579B2/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000050431A (en) * | 1998-07-30 | 2000-02-18 | Hitachi Ltd | Distribution board for dc circuit |
| CN101814392A (en) * | 2009-02-19 | 2010-08-25 | 株式会社日立制作所 | Commutation type DC breaker |
| JP2015050900A (en) * | 2013-09-04 | 2015-03-16 | 富士電機株式会社 | Power conversion equipment and inspection stand |
| CN116525327A (en) * | 2023-05-06 | 2023-08-01 | 保定市冀中电力设备有限责任公司 | Secondary fusion on-column circuit breaker with protection type isolating switch |
| CN116525327B (en) * | 2023-05-06 | 2023-10-20 | 保定市冀中电力设备有限责任公司 | Secondary fusion on-column circuit breaker with protection type isolating switch |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3815579B2 (en) | 2006-08-30 |
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