JP3061697B2 - Breaker - Google Patents
BreakerInfo
- Publication number
- JP3061697B2 JP3061697B2 JP5038047A JP3804793A JP3061697B2 JP 3061697 B2 JP3061697 B2 JP 3061697B2 JP 5038047 A JP5038047 A JP 5038047A JP 3804793 A JP3804793 A JP 3804793A JP 3061697 B2 JP3061697 B2 JP 3061697B2
- Authority
- JP
- Japan
- Prior art keywords
- hydraulic
- operating device
- valve
- hydraulic operating
- main contact
- 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
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Description
【０００１】[0001]
【産業上の利用分野】この発明は、電力用に使用される
遮断器に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a circuit breaker used for electric power.
【０００２】[0002]
【従来の技術】高電圧化が進み、1000kV系統に適用する
遮断器の場合、投入時の過電圧のみならず遮断時の過電
圧をも制御することが送変電機器や送電線路の経済設計
のために要求される。遮断時の過電圧をも制御するため
には、遮断時に主接点が開極後に抵抗を挿入し、一定の
時間後に抵抗接点を開極する抵抗遮断方式の遮断器が必
要である。この遮断器の抵抗挿入時間は、系統をモデル
化した計算機解析の結果によれば約25ms必要であり、投
入時の過電圧を抑制するために必要な抵抗挿入時間の約
10msに比べて長い時間が必要である。一般に遮断器は投
入時に比べて、遮断時には高い電流遮断性能を得るため
に高速の動作を行なうことが必要である。上記条件を満
たすためには、遮断時に主接点が開極したのち、開路最
終位置付近で初めて抵抗接点を開路しなければならな
い。このため主接点と抵抗接点を各々駆動するための別
々の駆動装置が必要である。2. Description of the Related Art In the case of a circuit breaker applied to a 1000kV system, the control of not only the overvoltage at the time of closing but also the overvoltage at the time of interruption is required for the economical design of transmission and transformation equipment and transmission lines. Required. In order to control the overvoltage at the time of interruption, a resistance-interruption type circuit breaker that inserts a resistor after the main contact is opened at the time of interruption and opens the resistance contact after a predetermined time is required. According to the results of computer analysis that models the system, the resistor insertion time of this breaker is required to be about 25 ms, which is about the required resistance insertion time to suppress overvoltage at closing.
It requires a longer time than 10ms. Generally, a circuit breaker needs to perform a high-speed operation in order to obtain a high current interruption performance at the time of interruption compared to the time of closing. In order to satisfy the above condition, the resistive contact must be opened for the first time near the final open position after the main contact is opened at the time of interruption. Therefore, separate driving devices for driving the main contact and the resistance contact, respectively, are required.
【０００３】図６は遮断抵抗付きの遮断器の概念図を示
す。接地した金属製のタンク200 の内部にＳＦ6 ガス20
1 が満たされ、抵抗体202 と直列接続された抵抗接点40
1 が主接点１と並列接続されている。主接点１及び抵抗
接点401 は、各々タンク200の外部に設けた第１の油圧
操作装置300 の差動ピストン３及び第２の油圧操作装置
400 の差動ピストン403 と連結機構２および連結機構40
2 を介して連結される。連結機構２及び連結機構402
は、各々図示しない絶縁操作ロッド・シャフト・リンク
類2a及び、402a、レバー2b及び402b、図示しないリンク
・ロッドエンド類2c及び402cで構成される。図示しない
絶縁操作ロッド・シャフト・リンク類2a及び402aは、図
示しないシャフトシール装置を介してタンク200 内部と
気密に気中に引き出されている。FIG. 6 is a conceptual diagram of a circuit breaker with a breaking resistor. SF 6 gas 20 inside the grounded metal tank 200
1 is filled and the resistor contact 40 connected in series with the resistor 202
1 is connected in parallel with the main contact 1. The main contact 1 and the resistance contact 401 are respectively connected to the differential piston 3 and the second hydraulic operating device of the first hydraulic operating device 300 provided outside the tank 200.
400 differential piston 403 and connecting mechanism 2 and connecting mechanism 40
Are connected through 2. Connecting mechanism 2 and connecting mechanism 402
Is composed of insulating operation rods, shafts and links 2a and 402a (not shown), levers 2b and 402b, and links and rod ends 2c and 402c (not shown). The insulating operation rods, shafts, links 2a and 402a (not shown) are drawn out of the tank 200 in an airtight manner through a shaft sealing device (not shown).
【０００４】次に第１の油圧操作装置300 及び第２の油
圧操作装置400 は、例えば図７に示されるものが用いら
れる。図において、１は開閉器の主接点で、連結機構２
を介して駆動装置６に連結され、投入・遮断動作を行な
う。駆動装置６は主接点１を駆動する差動ピストン３お
よびパッキン3aとシリンダ５及びダッシュポットリング
4a，4bよりなる。なお、駆動装置６は主弁７により操作
されるが、その際に増幅弁８を介して高圧油の供給をう
ける。なお、高圧油は図示されていないポンプにより常
に所定圧力に維持されるアキュムレータ９から供給され
る。高圧油はアキュムレータ９から管路10を介してシリ
ンダ５の内部の小ピストン面側の室5aに常時供給され、
更に管路11を介して主弁７に供給される。そして、管路
12，45，46を介して増幅弁８及び投入弁38に供給され
る。Next, as the first hydraulic operating device 300 and the second hydraulic operating device 400, for example, those shown in FIG. 7 are used. In the drawing, reference numeral 1 denotes a main contact of a switch, and a connecting mechanism 2
And is connected to the drive device 6 through the switch to perform a closing / closing operation. The driving device 6 includes a differential piston 3 and a packing 3a for driving the main contact 1, a cylinder 5, and a dash pot ring.
Consists of 4a and 4b. The driving device 6 is operated by the main valve 7, and at this time, is supplied with high-pressure oil via the amplification valve 8. The high-pressure oil is supplied from an accumulator 9 which is always maintained at a predetermined pressure by a pump (not shown). The high-pressure oil is constantly supplied from the accumulator 9 to the chamber 5a on the small piston face side inside the cylinder 5 via the pipe line 10,
Further, it is supplied to the main valve 7 through a pipe 11. And the pipeline
It is supplied to the amplification valve 8 and the input valve 38 via 12, 45, 46.
【０００５】主弁７は相対向して配設される排出弁14と
供給弁13及びばね13a ，14a により構成される。排出弁
14のパイロット室15は管路16を経由して増幅弁８から導
かれる高圧油の作用を受ける。その結果、供給弁13及び
排出弁14は一体となって動作して主弁７を切り換える。
すなわち、排出弁14のパイロット室15に高圧油が作用し
ないとき、差動ピストン３の大ピストン面側の室5bは、
管路17を介して低圧タンク18に連通される。一方、排出
弁14のパイロット室15が高圧油の作用を受ける時、差動
ピストン３の大ピストン面側の室5bは、管路11を介して
アキュムレータ９に連通される。増幅弁８は相対向して
配設される補助排出弁19、補助供給弁20及びばね19a ，
20a から構成され、補助排出弁19のパイロット室21に高
圧油の作用を受ける。その結果、補助排出弁19及び補助
供給弁20は一体となって動作して増幅弁８を切換える。
すなわち、パイロット室21に高圧油が作用するとき、管
路16は管路45を介してアキュムレータ９に連通する。一
方、高圧油が作用しない時、管路16は管路22を介して低
圧タンク18に連通する。補助排出弁19のパイロット室21
は、増幅弁８のほぼ中央に絞り24及び管路23を介して連
結されるとともに管路25に連通する。管路25は逆止弁26
及び管路37を経由して投入弁38の一端に接続されるとと
もに、管路40を介して遮断弁28の一端に接続される。遮
断弁28は管路27を介して低圧タンク18へ連通する。投入
弁38及び遮断弁28は、それぞれ球形弁29，30と復帰ばね
31，32で構成され、操作棒33，34を介して指令に応じて
直線的に動作する電磁装置35，36により操作される。各
電磁装置35，36は可動鉄心35a，36a 及び固定コイル35b
，36b からなる。The main valve 7 is composed of a discharge valve 14, a supply valve 13, and springs 13a, 14a arranged opposite to each other. Discharge valve
The 14 pilot chambers 15 are subjected to the action of high-pressure oil guided from the amplification valve 8 via the line 16. As a result, the supply valve 13 and the discharge valve 14 operate integrally to switch the main valve 7.
That is, when the high-pressure oil does not act on the pilot chamber 15 of the discharge valve 14, the large piston face side chamber 5b of the differential piston 3
It communicates with a low-pressure tank 18 via a pipe 17. On the other hand, when the pilot chamber 15 of the discharge valve 14 is subjected to the action of high-pressure oil, the chamber 5 b on the large piston face side of the differential piston 3 is connected to the accumulator 9 via the pipe 11. The amplification valve 8 includes an auxiliary discharge valve 19, an auxiliary supply valve 20, a spring 19a,
The high pressure oil acts on the pilot chamber 21 of the auxiliary discharge valve 19. As a result, the auxiliary discharge valve 19 and the auxiliary supply valve 20 operate integrally to switch the amplification valve 8.
That is, when high-pressure oil acts on the pilot chamber 21, the pipe 16 communicates with the accumulator 9 via the pipe 45. On the other hand, when the high-pressure oil does not act, the line 16 communicates with the low-pressure tank 18 via the line 22. Pilot chamber 21 for auxiliary discharge valve 19
Is connected to a substantially center of the amplification valve 8 through a throttle 24 and a pipe 23 and communicates with the pipe 25. Line 25 is check valve 26
And a line 37 connected to one end of the input valve 38, and a line 40 connected to one end of the shutoff valve 28. The shut-off valve 28 communicates with the low-pressure tank 18 via the line 27. The input valve 38 and the shutoff valve 28 are spherical valves 29 and 30 and a return spring, respectively.
It is operated by electromagnetic devices 35 and 36 which are constituted by 31 and 32 and operate linearly in response to commands via operation rods 33 and 34. Each electromagnetic device 35, 36 is composed of a movable iron core 35a, 36a and a fixed coil 35b.
, 36b.
【０００６】次に、この様な構成をもつ油圧操作装置の
動作を説明する。図８は主接点１が遮断された状態を示
す。図において、電磁装置35に投入指令が入力される
と、可動鉄心35a が駆動され、操作棒33を介して投入弁
38に作用し、球形弁29が開かれる。その結果、高圧油は
管路37から逆止弁26，管路25を通して補助排出弁19のパ
イロット室21に達する。この高圧油の作用により、増幅
弁８の補助排出弁19は下方に移動し、低圧タンク18に連
通する管路22を閉止するとともに、それに対向する補助
供給弁20を開口する。これにより、高圧油は管路12，管
路45及び管路16を通して、排出弁14のパイロット室15に
達して主弁７を切換える。なお、この状態においては、
補助排出弁19のパイロット室21には、管路45，23及び絞
り24を経由して高圧油が作用する為投入弁38が復帰して
もこの新しい位置が自己保持される。排出弁14はそのパ
イロット室15に高圧油の作用を受けると、低圧タンク18
に連通する管路17を閉止するとともに、対向して配設さ
れる供給弁13を開口させる。その結果、差動ピストン３
の大面積側の室5bには供給弁13及び管路11を通じて高圧
油が達し、差動ピストン３の油圧面積差のために図中上
方向の推力が発生して主接点１が投入され、図９の状態
となる。Next, the operation of the hydraulic operating device having such a configuration will be described. FIG. 8 shows a state where the main contact 1 is cut off. In the figure, when a closing command is input to the electromagnetic device 35, the movable iron core 35a is driven, and the closing valve is moved via the operating rod 33.
Acting on 38, the spherical valve 29 is opened. As a result, the high-pressure oil reaches the pilot chamber 21 of the auxiliary discharge valve 19 from the pipe 37 through the check valve 26 and the pipe 25. Due to the action of the high-pressure oil, the auxiliary discharge valve 19 of the amplification valve 8 moves downward, closing the pipe 22 communicating with the low-pressure tank 18 and opening the auxiliary supply valve 20 opposed thereto. Thereby, the high-pressure oil reaches the pilot chamber 15 of the discharge valve 14 through the pipe 12, the pipe 45 and the pipe 16, and switches the main valve 7. In this state,
Since the high pressure oil acts on the pilot chamber 21 of the auxiliary discharge valve 19 via the pipe lines 45 and 23 and the throttle 24, the new position is maintained even when the input valve 38 returns. When the high pressure oil is applied to the pilot chamber 15 of the discharge valve 14, the low pressure tank 18
Is closed, and the supply valve 13 disposed oppositely is opened. As a result, the differential piston 3
The high-pressure oil reaches the chamber 5b on the large area side through the supply valve 13 and the pipe line 11, and due to the difference in oil pressure area of the differential piston 3, an upward thrust is generated in the figure, and the main contact 1 is turned on. The state shown in FIG. 9 is obtained.
【０００７】次に図９の主接点が閉極状態において、電
磁装置36に遮断指令が入力されると可動鉄心36a が駆動
され操作棒34を介して遮断弁28に作用して球形弁30が開
かれる。その結果、増幅弁８の補助排出弁19のパイロッ
ト室21は、管路25，40及び27を経て低圧タンク18に連通
して高圧油が排出される。これにより、増幅弁８の補助
排出弁19は開口し、補助供給弁20が閉止する。この為、
主弁７の排出弁14のパイロット室15は、管路16，管路22
を通して低圧タンク18に連通し、パイロット室15内の高
圧油が排出される。主弁７の排出弁14は、そのパイロッ
ト室15の高圧油が排出されると低圧タンク18に連通する
管路17を開口するとともに、対向して配設される供給弁
13を閉止する。これにより、差動ピストン３の大面積側
の室5bの高圧油は、管路17を通して排出される。その結
果、図中、下方向の推力が発生するので、主接点１が遮
断されて図８に示される状態に戻る。なお、従来より制
御用の弁として、この説明に用いた球形弁の代りにポペ
ット弁が用いられることもあるが構成，作用はほぼ同様
であるので説明を省く。Next, when the shut-off command is input to the electromagnetic device 36 with the main contact in FIG. 9 closed, the movable iron core 36a is driven and acts on the shut-off valve 28 via the operating rod 34 to cause the spherical valve 30 to operate. be opened. As a result, the pilot chamber 21 of the auxiliary discharge valve 19 of the amplification valve 8 communicates with the low-pressure tank 18 via the pipes 25, 40, and 27 to discharge high-pressure oil. Thereby, the auxiliary discharge valve 19 of the amplification valve 8 is opened, and the auxiliary supply valve 20 is closed. Because of this,
The pilot chamber 15 of the discharge valve 14 of the main valve 7 is
And communicates with the low-pressure tank 18 to discharge the high-pressure oil in the pilot chamber 15. The discharge valve 14 of the main valve 7 opens a pipeline 17 communicating with the low-pressure tank 18 when the high-pressure oil in the pilot chamber 15 is discharged, and has a supply valve disposed opposite thereto.
Close 13. Thus, the high-pressure oil in the chamber 5 b on the large area side of the differential piston 3 is discharged through the pipe 17. As a result, a downward thrust is generated in the figure, so that the main contact 1 is cut off and returns to the state shown in FIG. A poppet valve may be used as a control valve in place of the spherical valve used in this description, but the configuration and operation are almost the same, and a description thereof will be omitted.
【０００８】次に上記のような構成による油圧操作装置
を２台用いて構成した従来の抵抗遮断方式のガス遮断器
を図７に示す。図７は主接点及び抵抗接点が閉路状態を
示す。図において、左側は主接点１を駆動する第１の油
圧操作装置300 、右側は抵抗接点401 を駆動する第２の
油圧操作装置400 である。52a は電気的な投入指令を、
52b は電気的な遮断指令をそれぞれ指令する制御装置、
54，53は各信号を電磁装置35，36に伝えるケーブルであ
る。ケーブル54は54a と54b に別れ各々第１及び第２の
油圧操作装置の電磁装置35と接続され、ケーブル53は53
a と53b に別れ、53a は第１の油圧操作装置300 の電磁
装置36と、53b は電気タイマー55を介して第２の油圧操
作装置400 の電磁装置36と接続される。主接点１及び抵
抗接点401 を投入する時は、投入指令を制御装置52a よ
りケーブル54a 及び54b を介して各々第１及び第２の油
圧操作装置300 ，400 の電磁装置35に入力し、第１及び
第２の油圧操作装置300 ，400 を同時に両接点の投入方
向に駆動する。両接点には電気的ワイピングの差を設
け、あるいは第１及び第２の油圧操作装置に駆動速度差
を設けることによって、抵抗接点401 が先に接触し、続
いて主接点１が接触するように構成されている。Next, FIG. 7 shows a conventional resistance cut-off type gas circuit breaker constituted by using two hydraulic operating devices having the above-described structure. FIG. 7 shows a state where the main contact and the resistance contact are closed. In the figure, the left is a first hydraulic operating device 300 for driving the main contact 1, and the right is a second hydraulic operating device 400 for driving the resistance contact 401. 52a issues an electrical input command,
52b is a control device for instructing each of the electric cutoff commands,
54 and 53 are cables for transmitting each signal to the electromagnetic devices 35 and 36. The cable 54 is divided into 54a and 54b and connected to the electromagnetic devices 35 of the first and second hydraulic operating devices, respectively.
53a is connected to the electromagnetic device 36 of the first hydraulic operating device 300, and 53b is connected to the electromagnetic device 36 of the second hydraulic operating device 400 via an electric timer 55. When closing the main contact 1 and the resistance contact 401, a closing command is input from the control device 52a to the electromagnetic devices 35 of the first and second hydraulic operating devices 300 and 400 via the cables 54a and 54b, respectively. And the second hydraulic operating devices 300 and 400 are simultaneously driven in the closing direction of both contacts. By providing a difference in electrical wiping between the two contacts, or by providing a drive speed difference between the first and second hydraulic operating devices, the resistance contact 401 comes in contact first, and then the main contact 1 comes in contact. It is configured.
【０００９】また、主接点１及び抵抗接点401 を開路す
る時は、遮断指令を制御装置52b よりケーブル53a を介
してまず第１の油圧操作装置300 の電磁装置36に入力
し、第１の油圧操作装置300 を主接点１の開極方向に駆
動する。抵抗接点401 は、ケーブル53b を介して遮断指
令が電気タイマー55で時間差を設けて第２の油圧操作装
置400 の電磁装置36に入力されるようになっており、主
接点１より遅れて開路されるように構成されている。以
上のように、２台の油圧操作装置を用いた遮断抵抗付き
遮断器は、各々の油圧操作装置を駆動するための電磁装
置を各々の油圧操作装置に設けると共に、必要とされる
抵抗挿入時間の長い開極時にはタイマー等を用いて主接
点と抵抗接点の順次動作を確保するのが一般的である。When the main contact 1 and the resistance contact 401 are opened, a disconnection command is first input from the control device 52b to the electromagnetic device 36 of the first hydraulic operating device 300 via the cable 53a, and the first hydraulic The operating device 300 is driven in the opening direction of the main contact 1. The resistance contact 401 is configured such that a disconnection command is input to the electromagnetic device 36 of the second hydraulic operating device 400 with a time difference provided by the electric timer 55 via the cable 53b, and is opened later than the main contact 1. It is configured to: As described above, a circuit breaker with a breaking resistor using two hydraulic operating devices is provided with an electromagnetic device for driving each hydraulic operating device in each hydraulic operating device, and the required resistance insertion time When the contact is long, it is common to use a timer or the like to ensure the sequential operation of the main contact and the resistance contact.
【００１０】[0010]
【発明が解決しようとする課題】従来の遮断抵抗付き遮
断器は以上のように構成され、主接点を駆動する第１の
油圧操作装置の遮断用電磁装置に遮断指令の励磁信号を
入力した後、限時継電器などを用いて所定の時間を経過
した後に抵抗接点を駆動する第２の油圧操作装置の遮断
用電磁装置に遮断指令の励磁信号を入力し主接点と抵抗
接点の順次遮断を行なうので、各々の油圧操作装置の遮
断用電磁装置の動作時間のばらつきによって遮断時の抵
抗挿入時間に変動を生じる恐れがある。これによって過
電圧の抑制が十分行えなくなる。また、抵抗挿入時間が
大きくなる場合には抵抗体の熱的な責務が厳しくなる等
の問題点があった。The prior art circuit breaker with a breaking resistor is constructed as described above, and is configured to input a shutoff command excitation signal to a shutoff electromagnetic device of a first hydraulic operating device for driving a main contact. After a predetermined time elapses using a time relay or the like, an excitation signal of a shutoff command is input to the shutoff electromagnetic device of the second hydraulic operating device that drives the resistance contact, and the main contact and the resistance contact are sequentially cutoff. In addition, there is a possibility that the resistance insertion time at the time of disconnection may fluctuate due to the variation in the operation time of the shutoff electromagnetic device of each hydraulic operating device. This makes it impossible to sufficiently suppress overvoltage. In addition, when the time for inserting the resistor is long, there is a problem that the thermal responsibility of the resistor becomes severe.
【００１１】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、動作信頼性の高い高電圧大容量
クラスの抵抗遮断方式の遮断器を提供することを目的と
する。SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a high-voltage, large-capacity class resistance cutoff circuit breaker with high operation reliability.
【００１２】[0012]
【００１３】[0013]
【００１４】[0014]
【課題を解決するための手段】この発明の遮断器は、第
１の油圧操作装置の第１の差動ピストン及び第２の油圧
操作装置の第２の差動ピストンの各大ピストン面側に高
圧油が作用して主接点及び抵抗接点が閉路している状態
で、第１の増幅弁のパイロット室を低圧に開放し、第１
の増幅弁の作用により第１の油圧切換弁を切換制御して
第１の差動ピストンの大ピストン面側の高圧油を低圧に
開放して主接点を開路するとともに、第２の増幅弁のパ
イロット室から油量の調整可能な油圧室と油圧絞りとを
順次経由して第１の増幅弁を介して第２の増幅弁のパイ
ロット室を低圧に開放し、第２の増幅弁の作用により第
２の油圧切換弁を切換制御して第２の差動ピストンの大
ピストン面側の高圧油を低圧に開放して抵抗接点を開路
するようにしたものである。According to the present invention, there is provided a circuit breaker comprising:
The first differential piston and the second hydraulic pressure of the first hydraulic operating device
The height of each large piston face of the second differential piston of the operating device is high.
The state in which the main and resistance contacts are closed due to the action of pressure oil
Then, the pilot chamber of the first amplification valve is opened to a low pressure,
Control of the first hydraulic switching valve by the operation of the amplifying valve to release the high-pressure oil on the large piston face side of the first differential piston to a low pressure to open the main contact and to open the main amplifying valve. The pilot chamber of the second amplification valve is opened to a low pressure via the first amplification valve via the first amplification valve via the hydraulic chamber in which the oil amount can be adjusted and the hydraulic throttle in order from the pilot chamber. The second hydraulic switching valve is controlled so as to open the high-pressure oil on the large piston surface side of the second differential piston to a low pressure to open the resistance contact.
【００１５】また、主接点及び抵抗接点が閉路している
状態で、第１の油圧切換弁を切換制御して第１の差動ピ
ストンの大ピストン面側の高圧油を低圧に開放して主接
点を開路するとともに、第２の増幅弁のパイロット室か
ら油量の調整可能な油圧室と油圧絞りとを順次経由して
第１の差動ピストンの大ピストン面側を介して第２の増
幅弁のパイロット室を低圧に開放し、第２の増幅弁の作
用により第２の油圧切換弁を切換制御して第２の差動ピ
ストンの大ピストン面側の高圧油を低圧に開放して、抵
抗接点を開路するようにしたものである。Further, in a state where the main contact and the resistance contact are closed, the first hydraulic switching valve is switched and controlled to release the high-pressure oil on the large piston surface side of the first differential piston to a low pressure to thereby reduce the main pressure. The contact is opened, and the second amplification is performed via the large piston surface side of the first differential piston through the pilot chamber of the second amplification valve, the hydraulic chamber in which the oil amount is adjustable, and the hydraulic throttle in order. Opening the pilot chamber of the valve to a low pressure, switching the second hydraulic switching valve by the action of the second amplification valve to release the high-pressure oil on the large piston face side of the second differential piston to a low pressure, The resistance contact is opened.
【００１６】[0016]
【００１７】[0017]
【００１８】さらに、第１の油圧切換弁のパイロット室
から第２の増幅弁の方向が順方向になる逆止弁と油圧絞
りとを並列にした管路の一端を第１の油圧切換弁のパイ
ロット室に接続し、管路の他端を油量の調整可能な油圧
室を経由して第２の増幅弁のパイロット室に接続して第
１の油圧切換弁のパイロット室の高圧油を作用させ、第
２の増幅弁の作用により第２の油圧切換弁のパイロット
室に高圧油を作用させ、第２の油圧切換弁の作用により
第２の差動ピストンの大ピストン面側に高圧油を作用さ
せて抵抗接点を閉路させる方向に駆動するようにしたも
のである。また、第１の差動ピストンの大ピストン面側
から第２の増幅弁の方向が順方向になる逆止弁と油圧絞
りとを並列にした管路の一端を第１の差動ピストンの大
ピストン面側に接続し、管路の他端を油量の調整可能な
油圧室を経由して第２の増幅弁のパイロット室に接続し
て第１の差動ピストンの大ピストン側の高圧油を作用さ
せ、第２の増幅弁の作用により第２の油圧切換弁のパイ
ロット室に高圧油を作用させ、第２の油圧切換弁の作用
により第２の差動ピストンの大ピストン面側に高圧油を
作用させて抵抗接点を閉路させる方向に駆動するように
したものである。Further, one end of a pipe line in which a check valve and a hydraulic throttle are arranged in parallel so that the direction of the second amplification valve from the pilot chamber of the first hydraulic switching valve to the forward direction is connected to the first hydraulic switching valve . The other end of the pipeline is connected to the pilot chamber of the second amplification valve via a hydraulic chamber capable of adjusting the amount of oil, and the other end of the pipeline is connected to the pilot chamber of the first hydraulic switching valve. High-pressure oil is applied, high-pressure oil is applied to the pilot chamber of the second hydraulic switching valve by the action of the second amplification valve, and the large piston face side of the second differential piston is operated by the action of the second hydraulic switching valve. To drive the resistance contact in a direction to close the resistance contact. In addition, one end of a pipe in which a check valve and a hydraulic throttle are arranged in parallel with the direction of the second amplification valve in the forward direction from the large piston surface side of the first differential piston is connected to the large diameter of the first differential piston. The other end of the pipeline is connected to the pilot chamber of the second amplification valve via a hydraulic chamber capable of adjusting the amount of oil, and the other end of the pipe is connected to the pilot chamber of the second differential valve. And the high pressure oil is applied to the pilot chamber of the second hydraulic switching valve by the action of the second amplification valve, and the high pressure oil is applied to the large piston face side of the second differential piston by the action of the second hydraulic switching valve. The resistance contact is driven in a direction to close by applying oil.
【００１９】[0019]
【作用】本発明に係る遮断器は、遮断指令により第１の
油圧操作装置の第１の油圧切換弁のパイロット室または
差動ピストンの大ピストン面側（ヘッド側）の油圧が低
圧に開放された時、油圧絞りを介して第２の油圧操作装
置の第２の増幅弁のパイロット室の高圧油を緩やかに低
圧に開放し、第２の油圧操作装置を第１の油圧操作装置
より遅れて抵抗接点の開極方向に駆動する。また、油量
の調整可能な油圧室の容積変化で第２の油圧操作装置の
動作遅延時間が微調整される。また、投入指令により第
１の油圧操作装置の第１の油圧切換弁のパイロット室ま
たは差動ピストンの大ピストン面側（ヘッド側）が高圧
に反転された時、逆止弁を介して第２の油圧操作装置の
第２の増幅弁のパイロット室に高圧油を速やかに供給
し、第２の油圧操作装置を第１の油圧操作装置とほぼ同
時に抵抗接点の投入方向に駆動する。In the circuit breaker according to the present invention, the hydraulic pressure in the pilot chamber of the first hydraulic switching valve of the first hydraulic operating device or the large piston surface side (head side) of the differential piston is released to a low pressure by a disconnection command. The high-pressure oil in the pilot chamber of the second amplifying valve of the second hydraulic operating device is slowly released to a low pressure via the hydraulic throttle, and the second hydraulic operating device is delayed with respect to the first hydraulic operating device. Drives in the opening direction of the resistance contact. Also, the amount of oil
The operation delay time of the second hydraulic operating device is finely adjusted by the change in the volume of the hydraulic chamber that can be adjusted. Also, when the pilot chamber of the first hydraulic switching valve of the first hydraulic operating device or the large piston surface side (head side) of the differential piston is reversed to a high pressure by the input command, the second hydraulic pressure is transmitted through the second check valve. Hydraulic operating equipment
The high-pressure oil is quickly supplied to the pilot chamber of the second amplification valve , and the second hydraulic operating device is driven almost simultaneously with the first hydraulic operating device in the closing direction of the resistance contact.
【００２０】[0020]
【実施例】以下、この発明の実施例を図について説明す
る。図１はこの発明の実施例を示す抵抗遮断方式のガス
遮断器の構造図であり、主接点及び抵抗接点の閉極状態
を示す。図において、64は油圧絞りで、第１の油圧操作
装置350 の排油弁14のパイロット室15は油圧管路61，63
及び油圧絞り64、油圧管路40，25を介して第２の油圧操
作装置450 の補助排出弁19のパイロット室21と連通され
る。油圧絞り64と第２の油圧操作装置450 の補助排出弁
19のパイロット室21との間には油圧室67が構成される。
一端がパッキン68a を介して油密に気中に引き出された
調整プラグ68を油圧室67内に押し込んで油圧室67の容積
が変えられるように構成されている。BRIEF DESCRIPTION OF THE DRAWINGS FIG. FIG. 1 is a structural view of a gas circuit breaker of a resistance cutoff type showing an embodiment of the present invention, and shows a closed state of a main contact and a resistance contact. In the figure, reference numeral 64 denotes a hydraulic throttle, and the pilot chamber 15 of the drain valve 14 of the first hydraulic operating device 350 has hydraulic lines 61 and 63.
The second hydraulic operating device 450 communicates with the pilot chamber 21 of the auxiliary discharge valve 19 via the hydraulic throttle 64 and the hydraulic lines 40 and 25. Hydraulic throttle 64 and auxiliary discharge valve of second hydraulic operating device 450
A hydraulic chamber 67 is formed between the 19 pilot chambers 21.
The adjustment plug 68, one end of which is drawn out into the air in an airtight manner through the packing 68a, is pushed into the hydraulic chamber 67 so that the volume of the hydraulic chamber 67 can be changed.
【００２１】次に、このように構成されたこの発明によ
る油圧操作装置の開路動作について説明する。投入状態
を示す図１において、制御装置52b よりケーブル53を介
して第１の油圧操作装置350 の電磁装置36に遮断指令が
入力されると、可動鉄心36aが駆動され操作棒34を介し
て遮断弁28に作用して球形弁30が開かれる。その結果、
増幅弁８の補助排出弁19のパイロット室21は、管路25及
び27を経て低圧タンク18に連通して高圧油が排出され
る。これにより、増幅弁８の補助排出弁19は開口し、補
助供給弁20が閉止する。この為、主弁７の排出弁14のパ
イロット室15は、管路16，管路22を通して低圧タンク18
に連通し、パイロット室15内の高圧油が排出される。主
弁７の排出弁14は、そのパイロット室15の高圧油が排出
されると低圧タンク18に連通する管路17を開口するとと
もに、対向して配設される供給弁13を閉止する。これに
より、差動ピストン３の大面積側の室5bの高圧油は、管
路17を通して排出される。その結果、図中、下方向の推
力が発生するので、主接点１が遮断される。第１の油圧
操作装置350 の動作の途中、主弁７の排油弁14のパイロ
ット室15が低圧に開放されると、第２の油圧操作装置45
0 の増幅弁８の補助排出弁19のパイロット室21は油圧管
路25，40、油圧絞り64、油圧管路63，61，22を介して低
圧タンク18に連通して高圧油が排出される。そして、第
２の油圧操作装置450 の補助排出弁19が開口し、補助供
給弁20が閉止する以下の動作は第１の油圧操作装置350
と同様に行なわれる。ただし、第２の油圧操作装置450
の補助排出弁19のパイロット室21の排出時間は油圧絞り
64によりゆるやかとなるように調整されている。これに
より、第２の油圧操作装置450 の補助排出弁19は第１の
油圧操作装置350 の補助排出弁19に比べて遅れて開口す
る。その結果、抵抗接点401 は主接点１より遅れて遮断
される。この遅れ時間は大きさの異なる油圧絞りの組み
替えを行なうことで調整が可能である。Next, the opening operation of the hydraulic operating device according to the present invention thus configured will be described. In FIG. 1 showing the closed state, when a cutoff command is input from the control device 52b to the electromagnetic device 36 of the first hydraulic operating device 350 via the cable 53, the movable iron core 36a is driven and cut off via the operating rod 34. Acting on valve 28, spherical valve 30 is opened. as a result,
The pilot chamber 21 of the auxiliary discharge valve 19 of the amplification valve 8 communicates with the low-pressure tank 18 via lines 25 and 27 to discharge high-pressure oil. Thereby, the auxiliary discharge valve 19 of the amplification valve 8 is opened, and the auxiliary supply valve 20 is closed. For this reason, the pilot chamber 15 of the discharge valve 14 of the main valve 7 is connected to the low pressure tank 18 through the pipes 16 and 22.
And the high-pressure oil in the pilot chamber 15 is discharged. When the high-pressure oil in the pilot chamber 15 is discharged, the discharge valve 14 of the main valve 7 opens a conduit 17 communicating with the low-pressure tank 18 and closes the supply valve 13 disposed opposite to the pipe 17. Thus, the high-pressure oil in the chamber 5 b on the large area side of the differential piston 3 is discharged through the pipe 17. As a result, a downward thrust is generated in the figure, so that the main contact 1 is cut off. When the pilot chamber 15 of the drain valve 14 of the main valve 7 is opened to a low pressure during the operation of the first hydraulic operating device 350, the second hydraulic operating device 45
The pilot chamber 21 of the auxiliary discharge valve 19 of the amplifying valve 8 communicates with the low-pressure tank 18 via the hydraulic lines 25 and 40, the hydraulic throttle 64, and the hydraulic lines 63, 61 and 22 to discharge high-pressure oil. . And the second
The following operation in which the auxiliary discharge valve 19 of the second hydraulic operating device 450 is opened and the auxiliary supply valve 20 is closed will be described below.
Is performed in the same manner as However, the second hydraulic operating device 450
The discharge time of the pilot chamber 21 of the auxiliary discharge valve 19 is
Tweaked to be more relaxed at 64. Thus, the auxiliary discharge valve 19 of the second hydraulic operating device 450 opens later than the auxiliary discharge valve 19 of the first hydraulic operating device 350. As a result, the resistance contact 401 is cut off later than the main contact 1. This delay time can be adjusted by performing a set <br/> replacement of different hydraulic diaphragm sizes.
【００２２】なお、油圧絞り64は具体的には図３に示す
ような形状のものが用いられる。図において、641 は絞
り穴であり、その中に円柱状のピン642 が挿入され、両
者の間の環状のすきま部分が油圧絞りとして作用する。
また、第２の油圧操作装置450 の補助排出弁19のパイロ
ット室21の排出時間は、油圧絞り64と補助排出弁19のパ
イロット室21の間の容積によっても変化する。即ち、油
圧絞り64の組み替えを行なうまでもなく、油圧室67への
調整プラグ68の押し込み量を外部から調整することによ
り容積が変化でき、容積が大きいほど油圧絞りを介して
高圧油が排出される時間を遅らせることができる。これ
によると、油圧絞り64は、調整プラグ68との併用によっ
て図４に示すような絞り穴643 のみで構成される簡素な
形状のものとすることができる。図３の構成による油圧
絞りは環状の絞りとすることで絞り断面積を小さくする
ため、例えば周囲温度の変化に伴う作動油の粘性変化に
よって、油圧絞りを通過する作動油の流量が大きく影響
を受ける。その結果、第２の油圧操作装置450 の補助排
出弁19のパイロット室21の排出時間は周囲温度による影
響を受け易い。しかしながら、図４に示すような油圧絞
りを採用することによって、周囲温度によるばらつきを
小さくすることができる。The hydraulic throttle 64 has a specific shape as shown in FIG. In the drawing, reference numeral 641 denotes a throttle hole, into which a cylindrical pin 642 is inserted, and an annular clearance between the two acts as a hydraulic throttle.
Further, the discharge time of the pilot discharge chamber 19 of the auxiliary discharge valve 19 of the second hydraulic operating device 450 varies depending on the volume between the hydraulic throttle 64 and the pilot discharge chamber 21 of the auxiliary discharge valve 19. That is, without changing the hydraulic throttle 64, the volume can be changed by externally adjusting the pushing amount of the adjusting plug 68 into the hydraulic chamber 67, and the larger the volume, the more the high-pressure oil is discharged through the hydraulic throttle. Time can be delayed. According to this, the hydraulic throttle 64 can have a simple shape composed of only the throttle hole 643 as shown in FIG. In order to reduce the cross-sectional area of the hydraulic throttle according to the configuration shown in FIG. receive. As a result, the discharge time of the pilot chamber 21 of the auxiliary discharge valve 19 of the second hydraulic operating device 450 is easily affected by the ambient temperature. However, by employing a hydraulic throttle as shown in FIG. 4, variations due to the ambient temperature can be reduced.
【００２３】また、調整プラグ68は、例えば図５に示す
ように、六角の頭部を有するボルト状とし、ネジ部を油
圧穴側のメネジ部にねじ込む構造とする。ネジ部と六角
頭部の間には、シール68a を設けて高油圧部をシールす
る。また、保持部材681 をボルト682 で油圧室の構成部
材に固定することによって、調整プラグ68の位置固定を
行う。保持部材681 のボルト穴681aは小判状とし、調整
したい位置に調整プラグ68を固定できる。As shown in FIG. 5, for example, the adjusting plug 68 is formed in a bolt shape having a hexagonal head, and a screw portion is screwed into a female screw portion on the hydraulic hole side. A seal 68a is provided between the screw portion and the hexagonal head to seal the high hydraulic pressure portion. The position of the adjustment plug 68 is fixed by fixing the holding member 681 to a component member of the hydraulic chamber with a bolt 682. The bolt hole 681a of the holding member 681 is formed in an oval shape, and the adjustment plug 68 can be fixed at a position to be adjusted.
【００２４】次に、図２は主接点１の開極状態を示す。
図において、66は第１の油圧操作装置350 の排油弁14の
パイロット室15から第２の油圧操作装置450 の補助排出
弁19のパイロット室21への流れが順方向で油圧絞り64と
並列に設けた逆止弁である。このように構成された油圧
操作装置の閉路動作について説明する。開極状態を示す
図２において、制御装置52a を介して第１の油圧操作装
置350の電磁装置35に投入指令が入力されると、可動鉄
心35a が駆動され、操作棒33を介して投入弁38に作用
し、球形弁29が開かれる。その結果、高圧油は管路37か
ら逆止弁26，管路25を通して補助排出弁19のパイロット
室21に達する。この高圧油の作用により、増幅弁８の補
助排出弁19は下方に移動し、低圧タンク18に連通する管
路22を閉止するとともに、それに対向する補助供給弁20
を開口せしめる。これにより、高圧油は管路12，管路45
及び管路16を通して、排出弁14のパイロット室15に達し
て主弁７を切換える。なお、この状態においては、補助
排出弁19のパイロット室21には、管路45，23及び絞り24
を経由して高圧油が作用する為、投入弁38が復帰しても
この新しい位置が自己保持される。排出弁14はそのパイ
ロット室15に高圧油の作用を受けると、低圧タンク18に
連通する管路17を閉止するとともに、対向して配設され
る供給弁13を開口させる。その結果、差動ピストン３の
大面積側の室5bには供給弁13及び管路11を通じて高圧油
が達し、差動ピストン３の受圧面積差のために図中上方
向の推力が発生して主接点１が投入され、図１の左図の
状態となる。FIG. 2 shows an open state of the main contact 1.
In the drawing, reference numeral 66 denotes a flow from the pilot chamber 15 of the oil drain valve 14 of the first hydraulic operating device 350 to the pilot chamber 21 of the auxiliary drain valve 19 of the second hydraulic operating device 450 in the forward direction, which is parallel to the hydraulic throttle 64. This is a check valve provided in. The closing operation of the hydraulic operating device thus configured will be described. In FIG. 2 showing the contact opening state, when a closing command is input to the electromagnetic device 35 of the first hydraulic operating device 350 via the control device 52a, the movable iron core 35a is driven, and the closing valve is connected via the operating rod 33. Acting on 38, the spherical valve 29 is opened. As a result, the high-pressure oil reaches the pilot chamber 21 of the auxiliary discharge valve 19 from the pipe 37 through the check valve 26 and the pipe 25. By the action of the high-pressure oil, the auxiliary discharge valve 19 of the amplification valve 8 moves downward, closes the pipe 22 communicating with the low-pressure tank 18, and closes the auxiliary supply valve 20.
To open. As a result, the high-pressure oil is supplied to the pipe 12 and the pipe 45.
And through a line 16 to reach the pilot chamber 15 of the discharge valve 14 to switch the main valve 7. In this state, the pilot chamber 21 of the auxiliary discharge valve 19 is provided with the pipes 45 and 23 and the throttle 24.
, The new position is self-maintained even when the input valve 38 returns. When the discharge valve 14 receives the action of the high-pressure oil in the pilot chamber 15, the discharge valve 14 closes the pipeline 17 communicating with the low-pressure tank 18 and opens the supply valve 13 disposed opposite thereto. As a result, high-pressure oil reaches the chamber 5b on the large area side of the differential piston 3 through the supply valve 13 and the pipeline 11, and an upward thrust in the figure is generated due to the pressure receiving area difference of the differential piston 3. The main contact 1 is turned on, and the state shown in the left diagram of FIG. 1 is obtained.
【００２５】第１の油圧操作装置350 の動作の途中、主
弁７の排油弁14のパイロット室15が高圧に反転される
と、第２の油圧操作装置450 の増幅弁８の補助排出弁19
のパイロット室21は油圧管路61，63、逆止弁66、油圧管
路40，25を介して高圧油が供給され、以下、第２の油圧
操作装置450 の動作も第１の油圧操作装置350 と同様に
行なわれる。第２の油圧操作装置450 の補助排出弁19の
パイロット室21への高圧油の供給は油圧絞り64に並列に
設けられた逆止弁66により速やかに行なわれる。これに
より、補助排出弁19は第１の油圧操作装置350 のそれと
ほぼ同時に閉止される。その結果、第２の油圧操作装置
450 は第１の油圧操作装置350 とほぼ同時に動作を開始
する。主接点１と抵抗接点401 に電気的ワイピング差を
設けることにより、抵抗接点401 を先に投入し、続けて
主接点１を投入できる。また、第２の油圧操作装置450
の投入速度を第１のそれに比べて少し早めに調整するこ
とにより、同様に抵抗接点401 を先に投入し、続けて主
接点１を投入できる。When the pilot chamber 15 of the drain valve 14 of the main valve 7 is reversed to a high pressure during the operation of the first hydraulic operating device 350, the auxiliary discharge valve of the amplification valve 8 of the second hydraulic operating device 450 19
The high pressure oil is supplied to the pilot chamber 21 through the hydraulic lines 61 and 63, the check valve 66, and the hydraulic lines 40 and 25. Hereinafter, the operation of the second hydraulic operating device 450 is also performed by the first hydraulic operating device. Performed as for 350. The supply of high-pressure oil to the pilot chamber 21 of the auxiliary discharge valve 19 of the second hydraulic operating device 450 is promptly performed by a check valve 66 provided in parallel with the hydraulic throttle 64. Thereby, the auxiliary discharge valve 19 is closed almost simultaneously with that of the first hydraulic operating device 350. As a result, the second hydraulic operating device
450 starts operating almost simultaneously with the first hydraulic operating device 350. By providing an electrical wiping difference between the main contact 1 and the resistance contact 401, the resistance contact 401 can be turned on first, and the main contact 1 can be turned on subsequently. In addition, the second hydraulic operating device 450
By adjusting the closing speed a little earlier than the first, the resistance contact 401 can be closed first and the main contact 1 can be closed subsequently.
【００２６】上記の実施例は、第１の油圧操作装置350
の排油弁14のパイロット室15と第２の油圧操作装置450
の補助排出弁19のパイロット室21とを連通した場合を示
したが、第１の油圧操作装置の差動ピストン３の大ピス
トン面側（ヘッド側）5bと第２の油圧操作装置の補助排
出弁19のパイロット室21を油圧管路62，63、油圧絞り6
4、逆止弁66、油圧管路40，25を介して連通した場合も
同様の動作を得ることができる。In the above embodiment, the first hydraulic operating device 350
Chamber 15 of the oil drain valve 14 and the second hydraulic operating device 450
In this case, the auxiliary discharge valve 19 is communicated with the pilot chamber 21 of the first hydraulic operating device, but the large piston surface side (head side) 5b of the differential piston 3 of the first hydraulic operating device and the auxiliary discharge of the second hydraulic operating device. Hydraulic lines 62 and 63, hydraulic throttle 6
4, it is possible to check valve 66, even when communicated via the hydraulic lines 40,25 achieve the same operation.
【００２７】[0027]
【発明の効果】この発明の遮断器は以上のように構成さ
れているので、遮断時における抵抗の挿入時間が安定す
る。さらに、主接点の開路を油圧で伝達して抵抗接点を
開路するので動作の信頼性が向上する。また、主接点が
閉路方向へ駆動されるとともに油圧で伝達して抵抗接点
を閉路方向へ駆動させる動作信頼性が向上する。According to the circuit breaker of the present invention, the insertion time of the resistor at the time of interruption is stabilized. Further, since the opening of the main contact is transmitted by hydraulic pressure to open the resistance contact, the reliability of the operation is improved. Further, the operation reliability in which the main contact is driven in the closing direction and transmitted by hydraulic pressure to drive the resistance contact in the closing direction is improved.
【図１】この発明の一実施例で、遮断器の投入状態を示
す油圧操作装置の構成図である。FIG. 1 is a configuration diagram of a hydraulic operating device showing a closed state of a circuit breaker according to an embodiment of the present invention.
【図２】この発明の一実施例で、遮断器の遮断状態を示
す油圧操作装置の構成図である。FIG. 2 is a configuration diagram of a hydraulic operating device showing an interrupted state of a circuit breaker in one embodiment of the present invention.
【図３】図１の要部である油圧絞り一実施例を示す断面
図である。FIG. 3 is a sectional view showing an example of a hydraulic throttle which is a main part of FIG.
【図４】図１の要部である油圧絞りの他の実施例を示す
断面図である。FIG. 4 is a sectional view showing another embodiment of the hydraulic throttle which is a main part of FIG.
【図５】図１の要部である油圧室の一実施例を示す断面
図である。FIG. 5 is a sectional view showing an embodiment of a hydraulic chamber which is a main part of FIG.
【図６】従来の抵抗付遮断器を示す概念的な構成図であ
る。FIG. 6 is a conceptual configuration diagram showing a conventional circuit breaker with a resistor.
【図７】従来の遮断器の投入状態を示す油圧操作装置の
構成図である。FIG. 7 is a configuration diagram of a conventional hydraulic operating device showing a closed state of a circuit breaker.
【図８】従来の油圧操作装置の遮断状態を示す説明図で
ある。FIG. 8 is an explanatory diagram showing a shut-off state of a conventional hydraulic operating device.
【図９】従来の油圧操作装置の投入状態を示す説明図で
ある。FIG. 9 is an explanatory view showing a closed state of a conventional hydraulic operating device.
１ 主接点 401 抵抗接点 350 第１の油圧操作装置 450 第２の油圧操作装置 ３ 差動ピストン ７ 主弁（油圧切換弁） ８ 増幅弁 ９ アキュムレータ 15 主弁のパイロット室 18 低圧タンク 21 増幅弁のパイロット室 64 油圧絞り 66 逆止弁 67 油圧室 DESCRIPTION OF SYMBOLS 1 Main contact 401 Resistance contact 350 1st hydraulic operating device 450 2nd hydraulic operating device 3 Differential piston 7 Main valve (hydraulic switching valve) 8 Amplification valve 9 Accumulator 15 Main valve pilot room 18 Low pressure tank 21 Amplification valve Pilot chamber 64 Hydraulic throttle 66 Check valve 67 Hydraulic chamber
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平５−242767（ＪＰ，Ａ) 特開 平５−94741（ＪＰ，Ａ) 特開 平５−225863（ＪＰ，Ａ) 特開 平６−5165（ＪＰ，Ａ) 実開 昭58−53331（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) H01H 33/34 H01H 33/42 H01H 33/16 ────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-5-242767 (JP, A) JP-A-5-94741 (JP, A) JP-A-5-225863 (JP, A) JP-A-5-25863 5165 (JP, A) Japanese Utility Model 1983-53331 (JP, U) (58) Fields investigated (Int. Cl. 7 , DB name) H01H 33/34 H01H 33/42 H01H 33/16
Claims (4)
タンク内に主接点を配置し、上記タンク内で抵抗体と抵
抗接点とを直列接続して上記主接点に並列接続し、上記
主接点及び上記抵抗接点を各々第１の油圧操作装置及び
第２の油圧操作装置と連結し、上記主接点及び上記抵抗
接点を開路するときは、先に上記第１の油圧操作装置を
駆動して上記主接点を開路し、続いて上記第２の油圧操
作装置を駆動して上記抵抗接点を開路するようにし、上
記各油圧操作装置は、駆動装置として差動ピストンを使
用し、上記差動ピストンの小ピストン面（ロッド側）に
は高圧油を作用させ、大ピストン面（ヘッド側）には油
圧を制御する油圧切換弁を介して上記差動ピストンを駆
動するようにした遮断器において、上記各差動ピストン
の各大ピストン面側に高圧油が作用して上記主接点及び
上記抵抗接点が閉路している状態で、上記第１の油圧操
作装置の第１の増幅弁のパイロット室を低圧に開放し、
上記第１の増幅弁の作用により上記第１の油圧操作装置
の第１の油圧切換弁を切換制御して上記第１の油圧操作
装置の第１の差動ピストンの大ピストン面側の高圧油を
低圧に開放して上記主接点を開路するとともに、上記第
２の油圧操作装置の第２の増幅弁のパイロット室から油
量の調整可能な油圧室と油圧絞りとを順次経由して上記
第１の増幅弁を介して上記第２の油圧操作装置の第２の
増幅弁のパイロット室を低圧に開放し、上記第２の増幅
弁の作用により上記第２の油圧操作装置の第２の油圧切
換弁を切換制御して上記第２の油圧操作装置の第２の差
動ピストンの大ピストン面側の高圧油を低圧に開放して
上記抵抗接点を開路するようにした遮断器。A main contact is disposed in a metal tank filled with an insulating gas and grounded, and a resistor and a resistance contact are connected in series in the tank and connected in parallel to the main contact. The main contact and the resistance contact are respectively connected to the first hydraulic operation device and the second hydraulic operation device, and when the main contact and the resistance contact are opened, the first hydraulic operation device is driven first. To open the main contact, and then drive the second hydraulic operating device to open the resistance contact. Each of the hydraulic operating devices uses a differential piston as a driving device, In a circuit breaker in which high-pressure oil is applied to the small piston surface (rod side) of the piston and the differential piston is driven to the large piston surface (head side) through a hydraulic switching valve that controls oil pressure, Each large piston face side of each differential piston In a state where the high-pressure oil acts on the main contact and the resistance contact, the pilot chamber of the first amplification valve of the first hydraulic operating device is opened to a low pressure,
The high pressure oil on the large piston face side of the first differential piston of the first hydraulic operating device is controlled by switching the first hydraulic switching valve of the first hydraulic operating device by the action of the first amplification valve. To a low pressure to open the main contact, and from the pilot chamber of the second amplification valve of the second hydraulic operating device, sequentially through the hydraulic chamber in which the oil amount can be adjusted and the hydraulic throttle, and The pilot chamber of the second amplifying valve of the second hydraulic operating device is opened to a low pressure through the first amplifying valve, and the second hydraulic pressure of the second hydraulic operating device is operated by the action of the second amplifying valve. A circuit breaker in which the switching valve is controlled to open the high-pressure oil on the large piston surface side of the second differential piston of the second hydraulic operating device to a low pressure to open the resistance contact.
タンク内に主接点を配置し、上記タンク内で抵抗体と抵
抗接点とを直列接続して上記主接点に並列接続し、上記
主接点及び上記抵抗接点を各々第１の油圧操作装置及び
第２の油圧操作装置と連結し、上記主接点及び上記抵抗
接点を開路するときは、先に上記第１の油圧操作装置を
駆動して上記主接点を開路し、続いて上記第２の油圧操
作装置を駆動して上記抵抗接点を開路するようにし、上
記各油圧操作装置は、駆動装置として差動ピストンを使
用し、上記差動ピストンの小ピストン面（ロッド側）に
は高圧油を作用させ、大ピストン面（ヘッド側）には油
圧を制御する油圧切換弁を介して上記差動ピストンを駆
動するようにした遮断器において、上記各差動ピストン
の各大ピストン面側に高圧油が作用して上記主接点及び
上記抵抗接点が閉路している状態で、上記第１の油圧操
作装置の第１の油圧切換弁を切換制御して上記第１の油
圧操作装置の第１の差動ピストンの大ピストン面側の高
圧油を低圧に開放して上記主接点を開路するとともに、
上記第２の油圧操作装置の第２の増幅弁のパイロット室
から油量の調整可能な油圧室と油圧絞りとを順次経由し
て上記第１の差動ピストンの大ピストン面側を介して上
記第２の油圧操作装置の増幅弁のパイロット室を低圧に
開放し、上記増幅弁の作用により上記第２の油圧操作装
置の第２の油圧切換弁を切換制御して上記第２の油圧操
作装置の第２の差動ピストンの大ピストン面側の高圧油
を低圧に開放して上記抵抗接点を開路するようにした遮
断器。2. A main contact is disposed in a metal tank filled with an insulating gas and grounded, and a resistor and a resistance contact are connected in series in the tank and connected in parallel to the main contact. The main contact and the resistance contact are respectively connected to the first hydraulic operation device and the second hydraulic operation device, and when the main contact and the resistance contact are opened, the first hydraulic operation device is driven first. To open the main contact, and then drive the second hydraulic operating device to open the resistance contact. Each of the hydraulic operating devices uses a differential piston as a driving device, In a circuit breaker in which high-pressure oil is applied to the small piston surface (rod side) of the piston and the differential piston is driven to the large piston surface (head side) through a hydraulic switching valve that controls oil pressure, Each large piston face side of each differential piston When the high-pressure oil acts on the main contact and the resistance contact, the first hydraulic switching device of the first hydraulic operating device is switched and controlled by the first hydraulic operating device. The high pressure oil on the large piston face side of the differential piston 1 is released to a low pressure to open the main contact,
The pilot pressure chamber of the second amplification valve of the second hydraulic operating device sequentially passes through a hydraulic chamber in which the amount of oil can be adjusted and a hydraulic throttle through the large piston surface side of the first differential piston. The pilot chamber of the amplification valve of the second hydraulic operating device is opened to a low pressure, and the second hydraulic switching device of the second hydraulic operating device is switched by the action of the amplification valve to control the second hydraulic operating device. A circuit breaker wherein the high-pressure oil on the large piston face side of the second differential piston is released to a low pressure to open the resistance contact.
タンク内に主接点を配置し、上記タンク内で抵抗体と抵
抗接点とを直列接続して上記主接点に並列接続し、上記
主接点及び上記抵抗接点を各々第１の油圧操作装置及び
第２の油圧操作装置と連結し、上記両接点を閉路すると
きは上記両油圧操作装置をほぼ同時に駆動して先に上記
抵抗接点が閉路するようにし、続いて上記主接点が閉路
するようにした遮断器において、上記第１の油圧操作装
置の第１の増幅弁を経由して油圧を制御する第１の油圧
切換弁のパイロット室に高圧油を作用させ、上記第１の
油圧切換弁の作用により上記第１の油圧操作装置の第１
の差動ピストンの大ピストン面側に高圧油を作用させて
上記主接点を閉路させる方向に駆動し、上記第１の油圧
切換弁のパイロット室から上記第２の油圧操作装置の第
２の増幅弁の方向が順方向になる逆止弁と油圧絞りとを
並列にした管路の一端を上記第１の油圧切換弁のパイロ
ット室に接続し、上記管路の他端を油量の調整可能な油
圧室を経由して上記第２の増幅弁のパイロット室に接続
して上記第１の油圧切換弁のパイロット室の高圧油を作
用させ、上記第２の増幅弁の作用により上記第２の油圧
操作装置の第２の油圧切換弁のパイロット室に高圧油を
作用させ、上記第２の油圧切換弁の作用により上記第２
の油圧操作装置の第２の差動ピストンの大ピストン面側
に高圧油を作用させて上記抵抗接点を閉路させる方向に
駆動するようにした遮断器。3. A main contact is disposed in a metal tank filled with an insulating gas and grounded, and a resistor and a resistance contact are connected in series in the tank and connected in parallel to the main contact. The main contact and the resistance contact are connected to a first hydraulic operating device and a second hydraulic operating device, respectively. When the two contacts are closed, the two hydraulic operating devices are driven almost simultaneously, and the resistance contact is turned on first. A pilot chamber of a first hydraulic switching valve for controlling a hydraulic pressure via a first amplification valve of the first hydraulic operating device in a circuit breaker in which the main contact is closed and then the main contact is closed. High-pressure oil acts on the first hydraulic operating device by the action of the first hydraulic switching valve.
The high pressure oil acts on the large piston surface side of the differential piston to drive the main contact in a direction to close the main contact, and the second amplification of the second hydraulic operating device is performed from the pilot chamber of the first hydraulic switching valve. One end of a pipe line in which a check valve and a hydraulic throttle are arranged in parallel so that the direction of the valve becomes forward is connected to the pilot chamber of the first hydraulic switching valve, and the other end of the pipe line is adjustable in oil amount Connected to the pilot chamber of the second amplifying valve via a simple hydraulic chamber to act on the high-pressure oil in the pilot chamber of the first hydraulic switching valve, and the second amplifying valve acts on the second hydraulic valve. The high-pressure oil is applied to the pilot chamber of the second hydraulic switching valve of the hydraulic operating device, and the second hydraulic switching valve is operated by the second hydraulic switching valve.
A circuit breaker in which high-pressure oil acts on the large piston surface side of the second differential piston of the hydraulic operating device of the above (1) to drive the resistance contact in a direction to close the circuit.
タンク内に主接点を配置し、上記タンク内で抵抗体と抵
抗接点とを直列接続して上記主接点に並列接続し、上記
主接点及び上記抵抗接点を各々第１の油圧操作装置及び
第２の油圧操作装置と連結し、上記両接点を閉路すると
きは上記両油圧操作装置をほぼ同時に駆動して先に上記
抵抗接点が閉路するようにし、続いて上記主接点が閉路
するようにした遮断器において、上記第１の油圧操作装
置の第１の増幅弁を経由して油圧を制御する第１の油圧
切換弁のパイロット室に高圧油を作用させ、上記第１の
油圧切換弁の作用により上記第１の油圧操作装置の第１
の差動ピストンの大ピストン面側に高圧油を作用させて
上記主接点を閉路させる方向に駆動し、上記第１の差動
ピストンの大ピストン面側から上記第２の油圧操作装置
の第２の増幅弁の方向が順方向になる逆止弁と油圧絞り
とを並列にした管路の一端を上記第１の差動ピストンの
大ピストン面側に接続し、上記管路の他端を油量の調整
可能な油圧室を経由して上記第２の増幅弁のパイロット
室に接続して上記第１の差動ピストンの大ピストン面側
の高圧油を作用させ、上記第２の増幅弁の作用により上
記第２の油圧操作装置の第２の油圧切換弁のパイロット
室に高圧油を作用させ、上記第２の油圧切換弁の作用に
より上記第２の油圧操作装置の第２の差動ピストンの大
ピストン面側に高圧油を作用させて上記抵抗接点を閉路
させる方向に駆動するようにした遮断器。4. A main contact is disposed in a metal tank filled with an insulating gas and grounded, and a resistor and a resistance contact are connected in series in the tank and connected in parallel to the main contact. The main contact and the resistance contact are connected to a first hydraulic operating device and a second hydraulic operating device, respectively. When the two contacts are closed, the two hydraulic operating devices are driven almost simultaneously, and the resistance contact is turned on first. A pilot chamber of a first hydraulic switching valve for controlling a hydraulic pressure via a first amplification valve of the first hydraulic operating device in a circuit breaker in which the main contact is closed and then the main contact is closed. High-pressure oil acts on the first hydraulic operating device by the action of the first hydraulic switching valve.
The main contact is closed by applying high-pressure oil to the large piston surface side of the differential piston, and the second hydraulic operating device of the second hydraulic operating device is driven from the large piston surface side of the first differential piston. One end of a pipeline in which a check valve and a hydraulic throttle are arranged in parallel with each other in which the direction of the amplification valve becomes forward is connected to the large piston surface side of the first differential piston, and the other end of the pipeline is connected to oil. The high pressure oil on the large piston face side of the first differential piston is actuated by connecting to the pilot chamber of the second amplification valve via a hydraulic chamber whose amount is adjustable, The high-pressure oil acts on the pilot chamber of the second hydraulic switching valve of the second hydraulic operating device by the action, and the second differential piston of the second hydraulic operating device by the action of the second hydraulic switching valve. Drive in the direction to close the resistance contact by applying high pressure oil to the large piston surface side of Breakers to so that.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5038047A JP3061697B2 (en) | 1993-02-26 | 1993-02-26 | Breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5038047A JP3061697B2 (en) | 1993-02-26 | 1993-02-26 | Breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06251664A JPH06251664A (en) | 1994-09-09 |
| JP3061697B2 true JP3061697B2 (en) | 2000-07-10 |
Family
ID=12514617
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5038047A Expired - Fee Related JP3061697B2 (en) | 1993-02-26 | 1993-02-26 | Breaker |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3061697B2 (en) |
-
1993
- 1993-02-26 JP JP5038047A patent/JP3061697B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06251664A (en) | 1994-09-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109285706B (en) | Hydraulic operating mechanism and switch using same | |
| JP2869265B2 (en) | Breaker | |
| JP3061697B2 (en) | Breaker | |
| CN1027561C (en) | Operating devices for gas circuit breakers | |
| JPS58106271A (en) | Control valve | |
| CN101226845A (en) | contact drive | |
| CN201540835U (en) | Devices for hydraulic transmissions of electrical switchgear | |
| GB723156A (en) | Improvements in and relating to gas blast electric circuit breakers | |
| JPS6235232Y2 (en) | ||
| JPS6222037Y2 (en) | ||
| JP3346088B2 (en) | Hydraulic operation circuit for power switchgear | |
| JPH0743565Y2 (en) | Pilot valve device | |
| JPH0213408B2 (en) | ||
| JP3314400B2 (en) | Gas circuit breaker | |
| KR100519887B1 (en) | Piston moving type gas interrupter | |
| JP3139812B2 (en) | Hydraulic drive | |
| JPH0253895B2 (en) | ||
| JPH0877889A (en) | Hydraulic drive | |
| JPH0439166B2 (en) | ||
| JP2839767B2 (en) | Operating device for resistance cut-off circuit breaker | |
| JPH06309996A (en) | Circuit breaker | |
| CN117780720A (en) | Hydraulic slide valve | |
| JPH1092271A (en) | Circuit breaker control device | |
| JPH0160886B2 (en) | ||
| JPH07105791A (en) | Hydraulic drive |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| S111 | Request for change of ownership or part of ownership |
Free format text: JAPANESE INTERMEDIATE CODE: R313111 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| S111 | Request for change of ownership or part of ownership |
Free format text: JAPANESE INTERMEDIATE CODE: R313113 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080428 Year of fee payment: 8 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090428 Year of fee payment: 9 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100428 Year of fee payment: 10 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100428 Year of fee payment: 10 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110428 Year of fee payment: 11 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120428 Year of fee payment: 12 |
|
| LAPS | Cancellation because of no payment of annual fees |