JP2839767B2 - Operating device for resistance cut-off circuit breaker - Google Patents
Operating device for resistance cut-off circuit breakerInfo
- Publication number
- JP2839767B2 JP2839767B2 JP25526191A JP25526191A JP2839767B2 JP 2839767 B2 JP2839767 B2 JP 2839767B2 JP 25526191 A JP25526191 A JP 25526191A JP 25526191 A JP25526191 A JP 25526191A JP 2839767 B2 JP2839767 B2 JP 2839767B2
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- JP
- Japan
- Prior art keywords
- operating device
- resistance
- main
- hydraulic
- valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Description
【０００１】[0001]
【産業上の利用分野】本発明は、抵抗遮断方式遮断器用
操作装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an operating device for a breaker of a resistance breaking type.
【０００２】[0002]
【従来の技術】遮断器の動作時に発生する電力系統の絶
縁上好ましくない開閉サージの抑制手段として抵抗投
入、抵抗遮断技術が知られている。すなわちこの抵抗遮
断方式遮断器は図８に示されているように主遮断部１
と、電流遮断時に主遮断部１によって遮断電流を転流す
るように配置された抵抗体２と、この抵抗体２に流れる
抵抗電流を遮断する抵抗遮断部３とから構成されてい
る。この抵抗遮断を実現するためには抵抗体２への適切
な通電時間を確保するため、遮断時３０ｍｓ、投入時１
０ｍｓ程度の主遮断部１と抵抗遮断部３の間の動作時間
差を確保することが必要であり、その詳細は実開昭５８
ー５３３３１号公報に示されている。その中では、作動
媒体として圧縮空気を用いたものが示されているが、大
容量遮断器では高圧油を用いた油圧操作装置の方が有利
である。非圧縮性で動作の高速化が容易であり、高圧力
化が可能なので同一操作力を発生するのに小形の操作装
置で実現できるためである。2. Description of the Related Art As a means for suppressing a switching surge which is not preferable for insulation of a power system generated when a circuit breaker is operated, a technique for turning on and off a resistor is known. That is, as shown in FIG.
And a resistor 2 arranged to commutate the interruption current by the main interruption unit 1 when the current is interrupted, and a resistance interruption unit 3 for interrupting the resistance current flowing through the resistor 2. In order to realize this resistance cutoff, in order to secure an appropriate energization time to the resistor 2, the cutoff time is 30 ms, and the closing time is 1 ms.
It is necessary to secure an operation time difference of about 0 ms between the main interrupting section 1 and the resistance interrupting section 3.
No. 5,331,331. Among them, one using compressed air as a working medium is shown, but a hydraulic operating device using high-pressure oil is more advantageous in a large-capacity circuit breaker. This is because it is incompressible and easy to operate at a high speed, and can be operated under a high pressure, so that the same operating force can be generated with a small operating device.
【０００３】[0003]
【発明が解決しようとする課題】上記従来技術で抵抗投
入、抵抗遮断での動作時間差を実現するためには、逆に
非圧縮性のため空気操作装置の充気特性の遅れに相当す
るものがなく、遅れ操作が難しくなる。このため油圧操
作装置で遅延操作を実現するためには特有の課題が生じ
る。In order to realize the operation time difference between the turning-on and turning-off of the resistance in the above-mentioned prior art, on the other hand, the one corresponding to the delay of the charging characteristics of the air operating device due to incompressibility is required. And delay operation becomes difficult. For this reason, a specific problem arises in realizing the delay operation with the hydraulic operating device.
【０００４】この他に動作時間差を簡単に得るには、電
気的遅延回路を用いて電力系統の制御システムから遮断
器に発せられる遮断指令信号を遅延させることが考えら
れる。しかし、遮断器の設置される現地では遮断器の開
閉時等に生じるサージの誘導を受け、電気回路による遅
延方式では誤動作もしくは故障の原因になり、信頼性確
保の観点から望ましくない。In addition, in order to easily obtain the operation time difference, it is conceivable to use an electric delay circuit to delay a cutoff command signal issued from a control system of a power system to a circuit breaker. However, on the site where the circuit breaker is installed, a surge is generated at the time of opening and closing of the circuit breaker, and the delay method using the electric circuit causes a malfunction or a failure, which is not desirable from the viewpoint of securing reliability.
【０００５】本発明は以上の点に鑑みなされたものであ
り、大容量遮断器に適する油圧操作装置でも抵抗遮断と
抵抗投入に必要な主遮断部と抵抗遮断部との動作時間差
を高信頼度で実現することを可能とした抵抗遮断方式遮
断器用操作装置を提供することを目的とするものであ
る。SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and even in a hydraulic operating device suitable for a large-capacity circuit breaker, the operation time difference between the main interrupting section and the resistance interrupting section necessary for interrupting resistance and turning on the resistance is highly reliable. It is an object of the present invention to provide an operating device for a resistance cutoff circuit breaker which can be realized by the above.
【０００６】[0006]
【課題を解決するための手段】すなわち本発明は、一対
の可動電極と固定電極からなる主遮断部と、電流遮断時
に前記主遮断部によって遮断電流を転流するように配置
された抵抗体と、この抵抗体に流れる抵抗電流を遮断す
る一対の可動電極と固定電極からなる抵抗遮断部とを備
え、前記主遮断部の可動電極を主遮断部用油圧操作装置
で駆動し、該主遮断部用油圧操作装置を第１のパイロッ
ト弁および主弁からなる圧力切替弁で駆動し、抵抗遮断
部の可動電極を抵抗遮断部用油圧操作装置で駆動し、該
抵抗遮断部用油圧操作装置を第２のパイロット弁および
主弁からなる圧力切替弁で駆動するようにした抵抗遮断
方式遮断器用操作装置において、遮断操作時の前記主遮
断部用油圧操作装置中の油圧変化を、前記抵抗遮断部用
油圧操作装置を駆動する第２のパイロット弁および主弁
からなる圧力切替弁の動作信号とするとともに、前記主
遮断部用油圧操作装置中の油圧変化を絞り部を通して前
記抵抗遮断部用油圧操作装置の前記第２のパイロット弁
および主弁からなる圧力切替に導いて抵抗遮断部用油圧
操作装置の動作開始信号とするようになし所期の目的を
達成するようにしたものである。 That is, the present invention provides a
The main breaking section consisting of the movable electrode and the fixed electrode
Arranged so that a breaking current is commutated by the main breaking portion
And cut off the resistance current flowing through this resistor.
A pair of movable electrodes and a resistance interrupter
The movable electrode of the main shut-off unit is connected to a hydraulic operating device for the main shut-off unit.
And the hydraulic operating device for the main shut-off section is moved to the first pilot
Driven by a pressure switching valve consisting of
The movable electrode of the section is driven by the hydraulic operating device for the resistance interrupting section,
The hydraulic operating device for the resistance interrupting section is connected to the second pilot valve and
Resistance cutoff driven by pressure switching valve consisting of main valve
In the operating device for a circuit breaker,
The change in hydraulic pressure in the hydraulic operating device for disconnection
Second pilot valve and main valve for driving hydraulic operating device
Operating signal of the pressure switching valve consisting of
Change the hydraulic pressure in the hydraulic operating device for the shut-off section through the throttle section before
The second pilot valve of the hydraulic operating device for the resistance interrupting section
And hydraulic pressure for the resistance interrupting section by leading to pressure switching consisting of the main valve
No signal to start the operation of the operating device
It is to achieve.
【０００７】[0007]
【作用】すなわちこのように形成された抵抗遮断方式遮
断器用操作装置であると、抵抗遮断部用油圧操作装置を
操作する第２の圧力切替弁に一方は時間遅れのない動作
開始信号が与えられ、また他方には絞り部を通して作ら
れた時間遅れのある動作開始信号を与えられることか
ら、これら２つの動作開始信号に基因してこの圧力切替
弁が作動し、前記操作装置の圧油が排出されて、抵抗遮
断がなされるようになるのである。すなわち、パイロッ
ト弁で圧力切替弁を作動させ、圧力切替弁で抵抗遮断部
を遮断するような大型タイプの遮断方式にあっては抵抗
遮断のために遅延時間を稼ぐことは開閉サージの抑制の
ために重要なことであり、これが油圧操作装置の発する
信号を絞り部を通すことによって遅延時間を稼ぎ、しか
も圧力切替弁を介して抵抗遮断部用油圧操作装置の圧油
を排出するものであるから、絞り部で設定した遅延時間
で正確に油圧操作装置から圧油を排出することができ、
したがって大容量遮断器においても抵抗遮断と抵抗投入
に必要な主遮断部と抵抗遮断部との動作時間を高信頼度
で実現することができるのである。 [Operation] That is, the resistance cut-off method formed as described above is used.
If it is a breaker operating device, the hydraulic operating device for the resistance cutoff
One of the operated second pressure switching valves has no time delay operation
A start signal is given and the other is made through a throttle
The operation start signal with a delayed time delay
Pressure switching based on these two operation start signals.
The valve is operated, and the pressure oil of the operating device is discharged, and the resistance is shut off.
They will be cut off. That is,
Actuate the pressure switching valve with the pressure valve, and the resistance cutoff section with the pressure switching valve.
In the case of a large-type shut-off system that shuts off
Increasing the delay time for shutting down can reduce switching surges.
This is important for the hydraulic operating device to emit
The delay time is gained by passing the signal through the throttle,
Also the pressure oil of the hydraulic operating device for the resistance cut-off section via the pressure switching valve
Delay time set in the throttle section
Can accurately discharge hydraulic oil from the hydraulic operating device,
Therefore, even in a large capacity circuit breaker, the resistance is cut off and the resistance is turned on.
Operation time of the main and resistance interrupting sections required for
It can be realized with.
【０００８】[0008]
【実施例】次に本発明を実施例により具体的に説明す
る。Next, the present invention will be described in detail with reference to examples.
【０００９】〔実施例 １〕図１には本発明の一実施例
が示されている。なお、従来と同じ部品には同じ符号を
付したので説明を省略する。一対の可動電極１ａと固定
電極１ｂからなる主遮断部１と、電流遮断時に主遮断部
１によって遮断電流を転流するように配置された抵抗体
２（図８参照）と、この抵抗体２に流れる抵抗電流を遮
断する一対の可動電極３ａと固定電極３ｂからなる抵抗
遮断部３とを備え、主遮断部１の可動電極１ａを主遮断
部用油圧操作装置４で駆動し、抵抗遮断部３の可動電極
３ａを抵抗遮断部用油圧操作装置５で駆動するようにし
た抵抗遮断方式遮断器用操作装置で、本実施例では遮断
動作時の主遮断部用油圧操作装置４中の油圧変化を抵抗
遮断部用油圧操作装置５の動作開始信号とすると共に、
主遮断部用油圧操作装置４中の油圧変化を絞り部６を通
して抵抗遮断部用油圧操作装置５の圧力切替弁（主弁）
７に導いて抵抗遮断部用油圧操作装置５の動作開始信号
とした。このようにすることにより、圧縮性のない作動
油に対しても良好な動作遅れ時間が実現できるようにな
って、電気回路部分に複雑な遅延回路を用いる必要はな
く、遮断器の動作時に発生する開閉サージの影響による
誤動作もしくは故障を回避することができるようにな
り、大容量遮断器に適する油圧操作装置でも抵抗遮断と
抵抗投入に必要な主遮断部と抵抗遮断部との動作時間差
を高信頼度で実現することを可能とした抵抗遮断方式遮
断器用操作装置を得ることができる。[Embodiment 1] FIG. 1 shows an embodiment of the present invention. Note that the same reference numerals are given to the same components as those in the related art, and a description thereof will be omitted. A main blocking portion 1 comprising a pair of movable electrodes 1a and a fixed electrode 1b; a resistor 2 (see FIG. 8) arranged so that a breaking current is commutated by the main blocking portion 1 when current is cut off; A resistance interrupting section 3 comprising a pair of movable electrodes 3a and a fixed electrode 3b for interrupting a resistance current flowing through the movable electrode 1a of the main interrupting section 1 by a hydraulic operating device 4 for the main interrupting section. 3 is an operating device for a resistance interrupting type circuit breaker in which the movable electrode 3a is driven by a hydraulic operating device 5 for resistance interrupting unit. The operation start signal of the hydraulic operating device 5 for the resistance interrupter is used as the signal,
The pressure change valve (main valve) of the hydraulic operating device 5 for the resistance interrupting unit through the throttle unit 6 to change the oil pressure in the hydraulic operating device 4 for the main interrupting unit.
7 and used as an operation start signal of the hydraulic operating device 5 for the resistance interrupting section. By doing so, a good operation delay time can be realized even for hydraulic oil that is not compressible, and it is not necessary to use a complicated delay circuit in the electric circuit part, and it is generated when the circuit breaker operates. Malfunctions or failures due to the effect of switching surges can be avoided, and even with a hydraulic operating device suitable for a large-capacity circuit breaker, the operating time difference between the main interrupter and the resistor interrupter required for interrupting and turning on the resistor is increased. It is possible to obtain a resistance-breaking-type circuit breaker operating device that can be realized with reliability.
【００１０】すなわち同図は遮断器の投入状態が示され
ており、主遮断部１と抵抗遮断部３にはそれぞれ油圧操
作装置４、５が機械的に接続されている。油タンク８内
の常圧油９は油圧ポンプ１０により３００気圧程度に加
圧され、アキュムレータ１１内の窒素ガス１２を圧縮し
て動作時の作動油１３として蓄積されている。That is, FIG. 1 shows the closed state of the circuit breaker. Hydraulic operating devices 4 and 5 are mechanically connected to the main breaker 1 and the resistance breaker 3, respectively. The normal pressure oil 9 in the oil tank 8 is pressurized to about 300 atm by a hydraulic pump 10 and compresses a nitrogen gas 12 in an accumulator 11 to be accumulated as a working oil 13 during operation.
【００１１】図示の遮断器の投入状態に対応する油圧初
期条件は、油タンク８に連通する遮断用パイロット弁１
４および両操作装置４、５の主弁７ａ、７に接続されて
いる低圧配管１５、１６、１７を除き、全て高圧になっ
ている。The initial hydraulic conditions corresponding to the closed state of the circuit breaker shown in FIG.
Except for the low-pressure pipes 15, 16 and 17 connected to the main valve 4 and the main valves 7a and 7 of both operating devices 4 and 5, all are at high pressure.
【００１２】図示の投入状態から遮断指令の電気信号が
遮断用の電磁フック機構１８に発せられると、パイロッ
ト弁スプール１９がバネ２０の力に抗して図示下方に移
動して弁２１を開き、主弁操作シリンダ２２内の高圧油
は低圧配管１５を通して常圧の油タンク８に流出する。
この結果、主弁スプール２３は左方からのみ高圧油が作
用して右方に移動し、弁２４を閉じて弁２５を開き、操
作シリンダ２６内のピストン２７右側に作用するシリン
ダ２８の油圧を高圧から低圧に切替える。このため主遮
断部１の可動電極１ａに結合されたピストン２７は面積
と両面の差圧で決まる油圧操作力を受け、可動電極１ａ
は遮断方向Ｓに駆動される。同時にシリンダ２８内の油
圧は絞り部６を介して抵抗遮断部用油圧操作装置５の主
弁７のシリンダ２９に接続される。シリンダ２９内の油
は絞り部６の開口面積で決まる流量で流出するので、ピ
ストン３０の面積と油の流出流量で決まる速度で主弁ス
プール３１が右方に移動する。これらの結果、主遮断部
１の場合と同様に抵抗遮断部用油圧操作装置５について
もシリンダ３２内のピストン３３右側に作用する油圧を
高圧から低圧に切替え、可動電極３ａに結合されたピス
トン３３にはその面積と両面の圧力差で決まる油圧操作
力を受け、遮断方向Ｓに駆動される。従って、主弁スプ
ール３１の動作開始時間は、ピストン３０すなわちシリ
ンダ２９の面積と絞り部６の開口面積で決まるので、予
め設定された時間後にシリンダ３２内の圧力が切り替わ
るよう、これらの関係を適切に設定しておかなければな
らない。When an electrical signal of a shutoff command is issued to the shutoff electromagnetic hook mechanism 18 from the closed state shown in the figure, the pilot valve spool 19 moves downward in the figure against the force of the spring 20 to open the valve 21, The high-pressure oil in the main valve operation cylinder 22 flows out to the oil tank 8 at normal pressure through the low-pressure pipe 15.
As a result, the high pressure oil acts on the main valve spool 23 only from the left and moves to the right. The valve 24 is closed and the valve 25 is opened, and the hydraulic pressure of the cylinder 28 acting on the right side of the piston 27 in the operation cylinder 26 is reduced. Switch from high pressure to low pressure. For this reason, the piston 27 coupled to the movable electrode 1a of the main shut-off section 1 receives a hydraulic operating force determined by the area and the pressure difference between both sides, and the movable electrode 1a
Are driven in the blocking direction S. At the same time, the hydraulic pressure in the cylinder 28 is connected to the cylinder 29 of the main valve 7 of the hydraulic operating device 5 for the resistance cutoff unit via the throttle unit 6. Since the oil in the cylinder 29 flows out at a flow rate determined by the opening area of the throttle section 6, the main valve spool 31 moves rightward at a speed determined by the area of the piston 30 and the flow rate of the oil flow. As a result, similarly to the case of the main shut-off unit 1, the hydraulic operating device 5 for the resistance shut-off unit also switches the hydraulic pressure acting on the right side of the piston 33 in the cylinder 32 from high pressure to low pressure, and the piston 33 connected to the movable electrode 3a. Receives a hydraulic operation force determined by the area and the pressure difference between both surfaces, and is driven in the shut-off direction S. Therefore, since the operation start time of the main valve spool 31 is determined by the area of the piston 30, that is, the cylinder 29, and the opening area of the throttle section 6, these relations are appropriately adjusted so that the pressure in the cylinder 32 switches after a preset time. Must be set to
【００１３】以上の結果、遮断動作について当初設定し
た動作時間差で、主遮断部１に対し抵抗遮断部３を遅延
動作させることが可能となる。As a result, it is possible to delay the operation of the resistance interrupting section 3 with respect to the main interrupting section 1 with the operation time difference initially set for the interrupting operation.
【００１４】遮断状態ではこの状態を保持している。引
き続く投入動作では投入指令の電気信号が投入用の電磁
フック機構３４に流れ、まずパイロット弁スプール３５
がバネ３６の力に抗して図示下方に移動して、主弁シリ
ンダ２９に高圧油を接続する。この結果、主弁スプール
３１は弁３７とピストン３０の面積差から駆動力が生
じ、左方に移動する。これにより、抵抗遮断用油圧操作
装置５のシリンダ３２内ピストン３３右側の空間の油圧
を低圧から高圧に切替え、シャフト３８断面積に作用す
る差圧によって操作力が生じる。従って、ピストン３３
とピストン３３に結合された抵抗遮断部３の可動電極３
ａは投入方向Ｎに駆動される。同時にシリンダ３２内の
高圧油圧は絞り部６ａを介して主遮断部用油圧操作装置
４の主弁操作シリンダ２２に導かれる。遮断動作時と同
様にシリンダ２２の面積と絞り部６ａからの作動油流量
で決まる速度で主弁スプール２３が左方に移動する。こ
の結果、主遮断部用油圧操作装置４についてもシリンダ
２６内ピストン２７右側の空間の油圧を予め設定された
時間後に低圧から高圧に切替え、可動電極１ａに結合さ
れたピストン２７はそのシャフト３９断面積に作用する
油圧操作力を受け、投入方向に駆動される。なお同図に
おいて４０は弁である。In the cutoff state, this state is maintained. In the subsequent closing operation, an electric signal of the closing command flows to the closing electromagnetic hook mechanism 34, and first, the pilot valve spool 35
Moves downward in the figure against the force of the spring 36 to connect high-pressure oil to the main valve cylinder 29. As a result, the main valve spool 31 generates a driving force due to the area difference between the valve 37 and the piston 30, and moves to the left. As a result, the hydraulic pressure in the space on the right side of the piston 33 in the cylinder 32 of the resistance cut-off hydraulic operating device 5 is switched from low pressure to high pressure, and an operating force is generated by the differential pressure acting on the shaft 38 cross-sectional area. Therefore, the piston 33
And movable electrode 3 of resistance interrupting unit 3 coupled to piston 33
a is driven in the closing direction N. At the same time, the high-pressure hydraulic pressure in the cylinder 32 is guided to the main valve operating cylinder 22 of the hydraulic operating device 4 for the main shut-off section via the throttle section 6a. As in the shut-off operation, the main valve spool 23 moves to the left at a speed determined by the area of the cylinder 22 and the flow rate of the hydraulic oil from the throttle portion 6a. As a result, the hydraulic operating device 4 for the main shut-off unit also switches the hydraulic pressure in the space on the right side of the piston 27 in the cylinder 26 from low pressure to high pressure after a preset time, and the piston 27 connected to the movable electrode 1a disconnects its shaft 39. Receiving the hydraulic operating force acting on the area, it is driven in the closing direction. In the figure, reference numeral 40 denotes a valve.
【００１５】以上の結果、投入動作についても当初設定
した動作時間差で、抵抗遮断部３に対し主遮断部１を遅
延動作させることが可能となる。As a result of the above, it is possible to delay the main interrupting section 1 with respect to the resistance interrupting section 3 with the initially set operation time difference in the closing operation.
【００１６】本実施例では主遮断部用油圧操作装置４の
主弁シリンダ２２は絞り部６ａを介して抵抗遮断部用油
圧操作装置５のシリンダ３２に接続されているので、遮
断状態では低圧に、投入状態では高圧に自動的に保持さ
れる。同様に、抵抗遮断部用油圧操作装置５の主弁シリ
ンダ２９は絞り６を介して主遮断部用油圧操作装置４の
シリンダ２６に接続されているので、同じく遮断状態で
は低圧に、投入状態では高圧に自動的に保持される。そ
のため投入状態および遮断状態を保持するための特別の
機構が不要となる特徴がある。In the present embodiment, the main valve cylinder 22 of the hydraulic operating device 4 for the main shut-off portion is connected to the cylinder 32 of the hydraulic operating device 5 for the resistance shut-off portion via the throttle portion 6a. , Is automatically maintained at a high pressure in the injection state. Similarly, the main valve cylinder 29 of the resistance cut-off unit hydraulic operating device 5 is connected to the cylinder 26 of the main cut-off unit hydraulic operating device 4 via the throttle 6, so that the pressure is low in the cut-off state and low in the closed state. Automatically maintained at high pressure. Therefore, there is a feature that a special mechanism for maintaining the closed state and the closed state is not required.
【００１７】このように本実施例によれば、電流遮断時
には主遮断部用油圧操作装置の油圧変化を検出してこれ
を抵抗遮断部のトリガー信号として用い、投入時には抵
抗遮断部用油圧操作装置の油圧変化を検出して主遮断部
用油圧操作装置のトリガー信号として用いており、作動
油の非圧縮性に伴う操作信号の高速伝達特性を緩和する
ため作動油の流路に絞り部を設け、その流出作動油によ
って後段の弁機構を操作するようにしているので、電気
回路部分に複雑な遅延回路を用いる必要がなく、遮断器
の動作時に発生する開閉サージの影響による誤動作もし
くは故障を回避でき、また油圧信号の伝達経路に絞り部
を設けたことにより圧縮性のない作動油に対しても良好
な動作遅れ時間が実現できる。As described above, according to the present embodiment, when the current is interrupted, a change in the hydraulic pressure of the hydraulic operating device for the main interrupting section is detected and used as a trigger signal for the resistance interrupting section. A change in hydraulic pressure is detected and used as a trigger signal for the hydraulic operating device for the main shut-off section.A throttle section is provided in the hydraulic oil flow path to mitigate the high-speed transmission characteristics of operating signals due to the incompressibility of hydraulic oil. The valve mechanism at the subsequent stage is operated by the spilled hydraulic oil, so there is no need to use a complicated delay circuit in the electric circuit part, thereby avoiding malfunctions or failures due to the effects of switching surges that occur during circuit breaker operation. Also, by providing the throttle portion in the transmission path of the hydraulic signal, it is possible to realize a good operation delay time even for hydraulic oil having no compressibility.
【００１８】〔実施例 ２〕図２には本発明の他の実施
例が示されている。本実施例は固定ピン４１、４２で支
持された回転レバー４３、４４を介して主遮断部１と抵
抗遮断部３を油圧操作装置４、５に接続したものであ
る。油圧操作装置４、５の構成、弁、ピストン等の位置
関係は前述の場合と同一であるが、同図は遮断器の遮断
位置に対応し、図示上方が主遮断部用油圧操作装置４、
下方が抵抗遮断部用油圧操作装置５となっている。電磁
フック機構も逆転し、上方が遮断用の電磁フック機構１
８、下方が投入用の電磁フック機構３４となる。動作は
投入と遮断を読み変えれば前述の場合と同様である。本
実施例では主遮断部用油圧操作装置４のシリンダ２８の
圧力の低圧から高圧への立上がりを抵抗遮断部用油圧操
作装置５に導き、その遮断動作開始信号としており、抵
抗遮断部用油圧操作装置５のシリンダ３２の圧力の高圧
から低圧への立下がりを主遮断部用油圧操作装置４の投
入動作開始信号としているので、前述の実施例に対し特
性を逆転することが可能である。[Embodiment 2] FIG. 2 shows another embodiment of the present invention. In this embodiment, the main shut-off unit 1 and the resistance shut-off unit 3 are connected to hydraulic operating devices 4 and 5 via rotary levers 43 and 44 supported by fixed pins 41 and 42, respectively. The configuration of the hydraulic operating devices 4 and 5 and the positional relationship of the valves, pistons and the like are the same as those described above, but FIG.
The lower part is a hydraulic operating device 5 for the resistance interrupting unit. The electromagnetic hook mechanism is also reversed, and the upper part is the electromagnetic hook mechanism 1 for blocking.
8. The lower part is the electromagnetic hook mechanism 34 for input. The operation is the same as in the above-mentioned case if the switching between the closing and the closing is read. In this embodiment, the rise of the pressure of the cylinder 28 of the main shut-off unit hydraulic operating device 4 from a low pressure to a high pressure is guided to the resistance shut-off unit hydraulic operating device 5 as a shut-off operation start signal. Since the falling of the pressure of the cylinder 32 of the device 5 from the high pressure to the low pressure is used as the closing operation start signal of the hydraulic operating device 4 for the main shut-off portion, the characteristics can be reversed with respect to the above-described embodiment.
【００１９】〔実施例 ３〕図３には油の温度制御に関
する一実施例が示されている。遮断器の設置される環境
の温度変化の範囲は例えば＋４０〜ー２０℃程度と大き
い。油圧操作装置に適用される作動油の粘性は温度によ
って変化し、本発明のように絞り部を用いて流量制御を
する場合、粘性の変化は動作のバラツキを大きくする。
本実施例では絞り部６ａの前段に油溜め４５を設け、ヒ
ータ４６で加熱することにより中の油４７の温度を一定
に制御するものである。このため油溜め４５には温度セ
ンサ４８を設けて温度を検出し、温度コントローラ４９
によってヒータ電流を制御している。油溜め４５の容積
は動作時に絞り部６ａを通過する油量、すなわち主弁ス
プール２３のピストン５０の径とその移動距離との積の
数倍程度であればよい。同図は主弁７ａが絞り部６ａに
対し下流側となる場合であるが、上流側になるときは油
溜め４５と絞り部６ａの位置関係を逆転すればよい。遮
断と投入とを繰返し高速動作をすることも考えて図４に
示されているように、絞り部６ａを挾んで両側に油溜め
４５、４５ａを設けるのも有効である。[Embodiment 3] FIG. 3 shows an embodiment relating to oil temperature control. The temperature change range of the environment where the circuit breaker is installed is as large as, for example, about +40 to -20 ° C. The viscosity of the hydraulic oil applied to the hydraulic operating device changes depending on the temperature. When the flow rate is controlled using the throttle unit as in the present invention, the change in the viscosity increases the variation in operation.
In the present embodiment, an oil reservoir 45 is provided in a stage preceding the throttle portion 6a, and the temperature of the oil 47 inside is controlled to be constant by heating with the heater 46. For this reason, a temperature sensor 48 is provided in the oil sump 45 to detect the temperature, and the temperature controller 49
This controls the heater current. The volume of the oil reservoir 45 may be about several times the amount of oil that passes through the throttle portion 6a during operation, that is, the product of the diameter of the piston 50 of the main valve spool 23 and its moving distance. The figure shows a case where the main valve 7a is on the downstream side with respect to the throttle section 6a, but when it is on the upstream side, the positional relationship between the oil reservoir 45 and the throttle section 6a may be reversed. It is also effective to provide oil sumps 45, 45a on both sides of the throttle 6a as shown in FIG.
【００２０】〔実施例 ４〕図５には絞り部と主弁シリ
ンダとの接続部に小規模のアキュムレータを設置した場
合が示されている。同図に示されているように、抵抗遮
断部用油圧操作装置の主弁７のシリンダ２９とこのシリ
ンダ２９を接続する配管５１の絞り部６との間にアキュ
ムレータ５２を設置したものである。アキュムレータ５
２の内部は窒素ガス１２が封入されており、高圧油５３
によって圧縮されている。遮断操作で配管５１内の圧力
が下がると、まずアキュムレータ５２内の油が絞り部６
を通して徐徐に排出され、窒素ガス１２の圧縮性の作用
でシリンダ２９内の圧力は図６に示されているように、
ほぼ直線的に低下するようになる。すなわち図中曲線Ａ
に示されているように、配管５１内の圧力が高圧Ｐｈか
ら低圧Ｐｌに低下すると、シリンダ２９内圧力も図中直
線Ｂのように徐徐に低下し、主弁スプール３１の動作開
始圧力Ｐｗまで低下すると、主弁スプール３１が移動を
開始する。本実施例では主遮断部の動作開始時刻ｔ1か
らｔ2まで主弁スプール３１が停止しているので、この
間の弁３７からの高圧作動油の無駄な流出を防止するこ
とが可能となる。更に時刻ｔ2までに絞り部６から流出
する油量はアキュムレータ５２のピストン５４の排除す
る油量となるので遅延時間を大きくすることが容易であ
る。従って、同一の遅延時間に対しては絞り部６の開口
面積を大きくできるので、図６で時刻ｔ2後の主弁スプ
ール３１（これら配管、シリンダ、主弁スプール、弁、
絞り、アキュムレータ、ピストン等は図５参照）の動作
速度を大きくすることが可能となる。[Embodiment 4] FIG. 5 shows a case where a small-scale accumulator is installed at a connection portion between a throttle portion and a main valve cylinder. As shown in the drawing, an accumulator 52 is provided between a cylinder 29 of a main valve 7 of a hydraulic operating device for a resistance interrupting section and a throttle section 6 of a pipe 51 connecting the cylinder 29. Accumulator 5
2 is filled with a nitrogen gas 12,
Has been compressed by. When the pressure in the pipe 51 is reduced by the shutoff operation, first, the oil in the accumulator 52 is discharged from the throttle section 6.
The pressure in the cylinder 29 is gradually reduced by the compressive action of the nitrogen gas 12 as shown in FIG.
It decreases almost linearly. That is, curve A in the figure
As shown in the figure, when the pressure in the pipe 51 decreases from the high pressure Ph to the low pressure Pl, the pressure in the cylinder 29 also gradually decreases as indicated by a straight line B in the figure, and reaches the operation start pressure Pw of the main valve spool 31. When lowered, the main valve spool 31 starts moving. In the present embodiment, the main valve spool 31 is stopped from the operation start time t 1 to t 2 of the main shut-off portion, so that it is possible to prevent the high-pressure hydraulic oil from flowing out of the valve 37 during this time. Further, the amount of oil flowing out of the throttle unit 6 by the time t 2 is the amount of oil removed by the piston 54 of the accumulator 52, so that it is easy to increase the delay time. Accordingly, it is possible to increase the opening area of the throttle portion 6 for the same delay time, the main valve spool 31 after the time t 2 in FIG. 6 (these pipes, cylinders, the main valve spool, a valve,
The operation speed of the throttle, the accumulator, the piston and the like (see FIG. 5) can be increased.
【００２１】図７には図５に述べたもののアキュムレー
タ５２の配管部に更に絞り部６ｂを設けたものである。
絞り部６ｂの流量は絞り部６に対して数倍以上の大きさ
としておき、遅れ時間に対しては絞り部６が支配的であ
ることが必要である。このようにすることのより、投入
時に配管５５から伝わる高圧信号に対しアキュムレータ
５２の容積が動作遅れの原因になるこを防止することが
できる。FIG. 7 shows the accumulator 52 shown in FIG. 5 further provided with a throttle 6b in the piping section.
It is necessary that the flow rate of the throttle unit 6b is several times or more that of the throttle unit 6 and that the throttle unit 6 is dominant with respect to the delay time. By doing so, it is possible to prevent the volume of the accumulator 52 from causing an operation delay with respect to the high-pressure signal transmitted from the pipe 55 at the time of injection.
【００２２】[0022]
【発明の効果】上述のように本発明は、大容量遮断器に
適する油圧操作装置でも抵抗遮断と抵抗投入に必要な主
遮断部と抵抗遮断部との動作時間差を高信頼度で実現で
きるようになって、大容量遮断器に適する油圧操作装置
でも抵抗遮断と抵抗投入に必要な主遮断部と抵抗遮断部
との動作時間差を高信頼度で実現することを可能とした
抵抗遮断方式遮断器用操作装置を得ることができる。As described above, according to the present invention, even with a hydraulic operating device suitable for a large-capacity circuit breaker, the operation time difference between the main interrupting section and the resistance interrupting section required for interrupting and closing the resistance can be realized with high reliability. For the resistance breaker type breaker, it is possible to realize with high reliability the operation time difference between the main breaker and the resistance breaker required for resistance breaking and resistance closing even with a hydraulic operating device suitable for a large capacity circuit breaker. An operating device can be obtained.
【図１】本発明の抵抗遮断方式遮断器用操作装置の一実
施例の説明図である。FIG. 1 is an explanatory diagram of one embodiment of an operating device for a resistance cutoff circuit breaker according to the present invention.
【図２】本発明の抵抗遮断方式遮断器用操作装置の他の
実施例の説明図である。FIG. 2 is an explanatory view of another embodiment of the operating device for a resistance breaking circuit breaker of the present invention.
【図３】本発明の抵抗遮断方式遮断器用操作装置の温度
制御に関する一実施例を示す説明図である。FIG. 3 is an explanatory view showing one embodiment relating to the temperature control of the operating device for a resistance cutoff circuit breaker of the present invention.
【図４】本発明の抵抗遮断方式遮断器用操作装置の温度
制御に関する他の実施例を示す説明図である。FIG. 4 is an explanatory view showing another embodiment relating to the temperature control of the operating device for a resistance cutoff circuit breaker of the present invention.
【図５】本発明の抵抗遮断方式遮断器用操作装置の油圧
操作機構部の一実施例を示す説明図である。FIG. 5 is an explanatory view showing one embodiment of a hydraulic operating mechanism of the operating device for a resistance cutoff circuit breaker of the present invention.
【図６】図５に示す油圧操作機構部の特性を示す特性図
である。6 is a characteristic diagram showing characteristics of the hydraulic operating mechanism shown in FIG.
【図７】本発明の抵抗遮断方式遮断器用操作装置の油圧
操作機構部の他の実施例を示す説明図である。FIG. 7 is an explanatory view showing another embodiment of the hydraulic operating mechanism of the operating device for a resistance cutoff circuit breaker according to the present invention.
【図８】抵抗遮断方式遮断器の回路図である。FIG. 8 is a circuit diagram of a resistance cutoff circuit breaker.
１…主遮断部、１ａ…可動電極（主遮断部用）、１ｂ…
固定電極（主遮断部用）、２…抵抗体、３…抵抗遮断
部、３ａ…可動電極（抵抗遮断部用）、３ｂ…固定電極
（抵抗遮断部用）、４…主遮断部用油圧操作装置、５…
抵抗遮断部用油圧操作装置、６…絞り部、７…圧力切替
弁（主弁）。DESCRIPTION OF SYMBOLS 1 ... Main interruption | blocking part, 1a ... Movable electrode (for main interruption | blocking parts), 1b ...
Fixed electrode (for main interrupting section), 2 ... resistor, 3 ... resistance interrupting section, 3a ... movable electrode (for resistance interrupting section), 3b ... fixed electrode (for resistance interrupting section), 4 ... Hydraulic operation for main interrupting section Equipment, 5 ...
Hydraulic operating device for resistance interrupting section, 6 ... throttle section, 7 ... pressure switching valve (main valve).
───────────────────────────────────────────────────── フロントページの続き (72)発明者 小柳 修 茨城県日立市久慈町4026番地 株式会社 日立製作所日立研究所内 (72)発明者 石川 孝二 茨城県日立市久慈町4026番地 株式会社 日立製作所日立研究所内 (72)発明者 黒沢 幸夫 茨城県日立市久慈町4026番地 株式会社 日立製作所日立研究所内 (72)発明者 中村 一朗 茨城県土浦市神立町502番地 株式会社 日立製作所機械研究所内 (56)参考文献 特開 昭62−193023（ＪＰ，Ａ) 実開 昭58−53331（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.6，ＤＢ名) H01H 33/30 H01H 33/16──────────────────────────────────────────────────の Continued on the front page (72) Inventor Osamu Koyanagi 4026 Kuji-cho, Hitachi City, Ibaraki Prefecture Inside Hitachi, Ltd.Hitachi Research Laboratory Co., Ltd. (72) Koji Ishikawa 4026 Kuji-cho, Hitachi City, Ibaraki Prefecture Hitachi Research, Ltd. In-house (72) Inventor Yukio Kurosawa 4026 Kuji-cho, Hitachi City, Ibaraki Prefecture Inside Hitachi, Ltd.Hitachi Research Laboratory (72) Inventor Ichiro Nakamura 502, Kandate-cho, Tsuchiura City, Ibaraki Prefecture, Hitachi, Ltd. JP-A-62-193023 (JP, A) JP-A-58-53331 (JP, U) (58) Fields investigated (Int. Cl. 6 , DB name) H01H 33/30 H01H 33/16
Claims (11)
断部と、電流遮断時に前記主遮断部によって遮断電流を
転流するように配置された抵抗体と、この抵抗体に流れ
る抵抗電流を遮断する一対の可動電極と固定電極からな
る抵抗遮断部とを備え、前記主遮断部の可動電極を主遮
断部用油圧操作装置で駆動し、該主遮断部用油圧操作装
置を第１のパイロット弁および主弁からなる圧力切替弁
で駆動し、前記抵抗遮断部の可動電極を抵抗遮断部用油
圧操作装置で駆動し、該抵抗遮断部用油圧操作装置を第
２のパイロット弁および主弁からなる圧力切替弁で駆動
するようにした抵抗遮断方式遮断器用操作装置におい
て、 遮断操作時の前記主遮断部用油圧操作装置中の油圧変化
を、前記抵抗遮断部用油圧操作装置を駆動する第２のパ
イロット弁および主弁からなる圧力切替弁の動作信号と
するとともに、前記主遮断部用油圧操作装置中の油圧変
化を絞り部を通して前記抵抗遮断部用油圧操作装置の前
記第２のパイロット弁および主弁からなる圧力切替弁に
導いて抵抗遮断部用油圧操作装置の動作開始信号とした
ことを特徴とする抵抗遮断方式遮断器用操作装置。1. A main interrupting portion including a pair of movable electrodes and a fixed electrode, a resistor arranged to commutate the interrupting current by the main interrupting portion when current is interrupted, and a resistor current flowing through the resistor. and a resistance circuit breaking portion comprising a pair of movable electrode and the fixed electrode for interrupting, the movable electrode of the main shut-off unit driven by a hydraulic operating device for a main interrupting unit, hydraulically operated instrumentation for main shut-off unit
Pressure switching valve comprising a first pilot valve and a main valve
And the movable electrode of the resistance interrupting section is driven by a hydraulic operating device for the resistance interrupting section.
In the operating device for a resistance cutoff circuit breaker driven by a pressure switching valve comprising a pilot valve and a main valve, a change in hydraulic pressure in the hydraulic operating device for the main shutoff portion during a shutoff operation
A second path for driving the hydraulic operating device for the front Symbol resistance circuit breaking portion
In addition to the operation signal of the pressure switching valve composed of the pilot valve and the main valve, a change in the oil pressure in the hydraulic operating device for the main shutoff unit is passed through the throttle unit before the hydraulic operating device for the resistance shutoff unit.
An operating device for a resistance breaking circuit breaker, wherein the operating device is guided to a pressure switching valve comprising a second pilot valve and a main valve and used as an operation start signal of a hydraulic operating device for a resistance breaking unit.
用油圧操作装置中の油圧変化を低圧力から高圧力への立
上り部分を、前記抵抗遮断部用油圧操作装置を駆動する
第２のパイロット弁および主弁からなる圧力切替弁に導
き抵抗遮断部用油圧操作装置の動作開始信号とされたも
のである請求項１記載の抵抗遮断方式遮断器用操作装
置。Wherein said breaker operating device, the rising portion of the hydraulic pressure change in the hydraulic operating device for the main blocking portion from the low pressure to high pressure, to drive a hydraulic operating device for the front Symbol resistance circuit breaking portion
2. The operating device for a resistance cut-off circuit breaker according to claim 1, wherein the operating device is a signal which is guided to a pressure switching valve including a second pilot valve and a main valve and is used as an operation start signal of the hydraulic operating device for the resistance interrupting unit.
用油圧操作装置中の油圧変化を高圧力から低圧力への立
下り部分を、前記抵抗遮断部用油圧操作装置を駆動する
第２のパイロット弁および主弁からなる圧力切替弁に導
き抵抗遮断部用油圧操作装置の動作開始信号とされたも
のである請求項１記載の抵抗遮断方式遮断器用操作装
置。Wherein the breaker operating device, the falling portion of the hydraulic pressure changes in the hydraulic operating device for a main interrupting unit from the high pressure to low pressure, drives a hydraulic operating device for the front Symbol resistance circuit breaking portion
2. The operating device for a resistance cut-off circuit breaker according to claim 1, wherein the operating device is a signal which is guided to a pressure switching valve including a second pilot valve and a main valve and is used as an operation start signal of the hydraulic operating device for the resistance interrupting unit.
前記抵抗遮断部用油圧操作装置中の油圧変化を、前記主
遮断部用油圧操作装置を駆動する第１のパイロット弁お
よび主弁からなる圧力切替弁の動作開始信号とされたも
のである請求項１記載の抵抗遮断方式遮断器用操作装
置。Wherein said breaker operating device, the hydraulic change in the hydraulic operating device for a resistance circuit breaking portion during the closing operation, the first pilot valve you to drive the hydraulic operating device for the front Symbol main interrupting unit
2. The operating device for a resistance cut-off circuit breaker according to claim 1, wherein the operating signal is a signal for starting operation of a pressure switching valve comprising a main valve and a main valve .
部用油圧操作装置中の油圧変化を絞り部を通して前記主
遮断部用油圧操作装置の前記第１のパイロット弁および
主弁からなる圧力切替弁に導き主遮断部用油圧操作装置
の動作開始信号とされたものである請求項４記載の抵抗
遮断方式遮断器用操作装置。5. An operation device for a circuit breaker, wherein the first pilot valve of the hydraulic operation device for the main shutoff portion is connected to a first hydraulic control device for the main interruption portion through a throttle portion.
5. The operating device for a resistance cut-off circuit breaker according to claim 4, wherein the operating device is a signal which is guided to a pressure switching valve formed of a main valve and is used as an operation start signal of a hydraulic operating device for a main shut-off unit.
部用油圧操作装置中の油圧変化の低圧力から高圧力への
立上り部分を、前記主遮断部用油圧操作装置を駆動する
第１のパイロット弁および主弁からなる圧力切替弁に導
き主遮断部用油圧操作装置の動作開始信号とされたもの
である請求項４記載の抵抗遮断方式遮断器用操作装置。Wherein said breaker operating device, the rising portion of the low pressure of the hydraulic change in the hydraulic operating device for the resistance circuit breaking portion to the high pressure, to drive a hydraulic operating device for the front Symbol main interrupting unit
5. The operating device for a resistance cut-off circuit breaker according to claim 4, wherein the operating device is a signal for starting operation of the hydraulic operating device for the main shut-off portion, which is led to a pressure switching valve comprising a first pilot valve and a main valve .
部用油圧操作装置中の油圧変化の高圧力から低圧力への
立下がり部分を、前記主遮断部用油圧操作装置を駆動す
る第１のパイロット弁および主弁からなる圧力切替弁に
導き主遮断部用油圧操作装置の動作開始信号とされたも
のである請求項４記載の抵抗遮断方式遮断器用操作装
置。Wherein said breaker operating device, a falling portion from the high pressure of the hydraulic change in the hydraulic operating device for the resistance circuit breaking portion to the low pressure, to drive the hydraulic operating device for the front Symbol main interrupting unit
5. The operating device for a resistance cut-off circuit breaker according to claim 4, wherein the operating device is a signal that is guided to a first switching valve including a first pilot valve and a main valve, and is used as an operation start signal of the hydraulic operating device for the main shut-off unit.
上流側に油溜めを設け、油溜め中の油の温度制御をする
ようにされたものである請求項１または請求項５記載の
抵抗遮断方式遮断器用操作装置。8. The operating device for a circuit breaker according to claim 1, wherein an oil sump is provided on an upstream side of the throttle unit to control a temperature of oil in the oil sump. Operating device for resistance cut-off circuit breaker.
前記抵抗遮断部用油圧操作装置の圧力切替弁との接続部
にアキュムレータが設置されたものである請求項１記載
の抵抗遮断方式遮断器用操作装置。9. The resistance interrupting system interrupter according to claim 1, wherein the circuit breaker operating device has an accumulator installed at a connection between the throttle section and a pressure switching valve of the resistance interrupting section hydraulic operating device. Dexterous operation device.
と前記主遮断部用油圧操作装置の圧力切替弁との接続部
にアキュムレータが設置されたものである請求項５記載
の抵抗遮断方式遮断器用操作装置。10. The resistance cut-off method according to claim 5, wherein the circuit breaker operating device has an accumulator installed at a connection between the throttle portion and a pressure switching valve of the hydraulic operating device for the main shut-off portion. Dexterous operation device.
ムレータの接続配管部に絞り部が設置されたものである
請求項９または請求項１０記載の抵抗遮断方式遮断器用
操作装置。11. The operating device for a circuit breaker according to claim 9, wherein the operating device for a circuit breaker has a throttle section installed in a connection pipe portion of the accumulator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25526191A JP2839767B2 (en) | 1991-10-02 | 1991-10-02 | Operating device for resistance cut-off circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25526191A JP2839767B2 (en) | 1991-10-02 | 1991-10-02 | Operating device for resistance cut-off circuit breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0594741A JPH0594741A (en) | 1993-04-16 |
| JP2839767B2 true JP2839767B2 (en) | 1998-12-16 |
Family
ID=17276294
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25526191A Expired - Lifetime JP2839767B2 (en) | 1991-10-02 | 1991-10-02 | Operating device for resistance cut-off circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2839767B2 (en) |
-
1991
- 1991-10-02 JP JP25526191A patent/JP2839767B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0594741A (en) | 1993-04-16 |
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