JPH05284646A - Overvoltage suppresser - Google Patents
Overvoltage suppresserInfo
- Publication number
- JPH05284646A JPH05284646A JP4080676A JP8067692A JPH05284646A JP H05284646 A JPH05284646 A JP H05284646A JP 4080676 A JP4080676 A JP 4080676A JP 8067692 A JP8067692 A JP 8067692A JP H05284646 A JPH05284646 A JP H05284646A
- Authority
- JP
- Japan
- Prior art keywords
- linear resistor
- suppressing device
- overvoltage suppressing
- voltage side
- voltage
- 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.)
- Pending
Links
Landscapes
- Emergency Protection Circuit Devices (AREA)
- Thermistors And Varistors (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は過電圧抑制装置に関する
ものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an overvoltage suppressing device.
【０００２】[0002]
【従来の技術】電力系統の過電圧を抑制する過電圧抑制
装置として、従来、例えば、特開平２−１０６１３３号
公報、特開平２−１４６９３０号公報に記載されてい
る、すなわち図１１に示すように電力系統１から大地２
に開閉装置部３と非直線抵抗体４とを直列接続して構成
されている。2. Description of the Related Art Conventionally, as an overvoltage suppressing device for suppressing an overvoltage of a power system, for example, as disclosed in JP-A-2-106133 and JP-A-2-146930, that is, as shown in FIG. Line 1 to Earth 2
The switchgear unit 3 and the non-linear resistor 4 are connected in series.
【０００３】[0003]
【発明が解決しようとする課題】上記従来技術は開閉装
置部が開極状態において、常時運転されている電圧に対
する開閉装置部と非直線抵抗体の電圧分担に関して何ら
配慮されていなかった。特に、これらが接地された金属
製の圧力タンクに収納されている場合に電圧分担の問題
が発生する。即ち、上記のように配慮がなされていない
と開極状態の開閉装置部と非直線抵抗体の固有のキャパ
シタンス及びこれらと接地されたタンクとの間の浮遊キ
ャパシタンスの値如何によっては複数個積み重ねられた
非直線抵抗体に好ましくない高い電圧がかかる。この場
合、開閉装置が開極状態であっても非直線抵抗体が熱暴
走したり、劣化したりする問題が生ずることを見出し
た。In the above-mentioned prior art, no consideration was given to the voltage sharing of the switchgear section and the non-linear resistor with respect to the voltage which is constantly operated when the switchgear section is open. In particular, when these are housed in a grounded metal pressure tank, a problem of voltage sharing occurs. That is, unless the above consideration is taken, a plurality of stacked switches may be stacked depending on the inherent capacitance of the switchgear unit in the open state and the non-linear resistor and the value of the stray capacitance between these and the grounded tank. An undesirably high voltage is applied to the nonlinear resistor. In this case, it has been found that there is a problem that the non-linear resistor may run away thermally or deteriorate even if the switchgear is in the open state.
【０００４】本発明は以上の点に鑑みなされたものであ
り、常時運転されている電圧に対して非直線抵抗体が熱
暴走したり、劣化したりしないことを可能とした過電圧
抑制装置を提供することを目的とするものである。The present invention has been made in view of the above points, and provides an overvoltage suppressing device capable of preventing a non-linear resistor from causing thermal runaway or deterioration with respect to a voltage which is constantly operated. The purpose is to do.
【０００５】[0005]
【課題を解決するための手段】上記目的は、装置に、常
時運転されている系統電圧に対して非直線抵抗体の単体
にかかる分担電圧を寿命保証値以下にする手段を設ける
ことにより、達成される。The above object is achieved by providing the device with means for reducing the shared voltage applied to a single non-linear resistor to a system voltage that is constantly operating to a life guarantee value or less. To be done.
【０００６】[0006]
【作用】上記手段を設けたので、常時運転されている電
圧に対して開閉装置部と複数個積み重ねられた非直線抵
抗体の電圧分担を制御でき、非直線抵抗体にかかる電圧
を保証値以下、非直線抵抗体が酸化亜鉛素子である場
合、これに数ｍＡの抵抗分電流を流した時の電圧値以下
にできるようになる。Since the above-mentioned means is provided, it is possible to control the voltage sharing of the non-linear resistors stacked with the switchgear section with respect to the voltage which is constantly operated, and the voltage applied to the non-linear resistors is less than the guaranteed value. When the non-linear resistor is a zinc oxide element, it becomes possible to reduce the voltage value to a value equal to or less than that when a resistance current of several mA is applied to the element.
【０００７】[0007]
【実施例】次に本発明を実施例により具体的に説明す
る。EXAMPLES Next, the present invention will be specifically described by way of examples.
【０００８】〔実施例 １〕図１及び図２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。複数個積み重ねら
れ、かつその両端が取付け金具５、６でそれぞれ接続さ
れた非直線抵抗体の酸化亜鉛素子体４ａと、電力系統の
事故電流遮断に先行して投入され、かつ対向配置された
雌部電極７および雄部電極８を有する開閉装置部３とが
接地された金属製の圧力タンク９内に直列に接続されて
いる過電圧抑制装置において、本実施例では装置に、常
時運転されている系統電圧に対して酸化亜鉛素子体４ａ
の単体にかかる分担電圧を寿命保証値以下にする手段を
設けた。このようにすることにより、常時運転されてい
る電圧に対して開閉装置部３と複数個積み重ねられた非
直線抵抗体の酸化亜鉛素子体４ａの電圧分担を制御で
き、酸化亜鉛素子体４ａにかかる電圧を保証値以下、非
直線抵抗体が酸化亜鉛素子４ａである場合、これに数ｍ
Ａの抵抗分電流を流した時の電圧値以下にできるように
なって、常時運転されている電圧に対して非直線抵抗体
が熱暴走したり、劣化したりしないことを可能とした過
電圧抑制装置を得ることができる。[Embodiment 1] FIGS. 1 and 2 show an embodiment of the present invention. Note that the same parts as those of the related art are denoted by the same reference numerals, and the description thereof will be omitted. A plurality of stacked zinc oxide element bodies 4a, which are non-linear resistors, both ends of which are connected by fittings 5 and 6, respectively, and females that are inserted prior to interruption of the fault current in the power system and are arranged opposite to each other. In an overvoltage suppressing device in which a switchgear unit 3 having a partial electrode 7 and a male electrode 8 is connected in series in a grounded metal pressure tank 9, the device is constantly operated in this embodiment. Zinc oxide element body 4a against system voltage
A means has been provided for keeping the shared voltage applied to the single unit below the guaranteed life value. By doing so, it is possible to control the voltage sharing of the switchgear unit 3 and a plurality of non-linear resistor zinc oxide element bodies 4a with respect to the voltage which is constantly operated, and the zinc oxide element body 4a is applied. If the voltage is less than the guaranteed value and the non-linear resistor is the zinc oxide element 4a, a few meters
It becomes possible to make it equal to or less than the voltage value when the resistance current of A is passed, and it is possible to prevent the non-linear resistor from causing thermal runaway or deterioration with respect to the constantly operating voltage. The device can be obtained.
【０００９】すなわち図１は本発明による過電圧抑制装
置の構造図であり、非直線抵抗体の酸化亜鉛素子体４ａ
を高電圧側に、開閉装置部３を接地側に配置した場合を
示す。このような配置にしたのは開閉装置部３に高速な
開閉操作が要求され、操作部の重量を極力軽くしたいた
めである。開閉装置部３を高電圧側に設置する場合、少
なくとも、絶縁操作棒の重量分が重くなり、不利であ
る。接地された金属製の圧力タンク９に高気圧ＳＦ6ガ
ス１０が封入されており、複数個積み重ねられた酸化亜
鉛素子体４ａが絶縁支持物１１、１２でタンク９に固定
されている。酸化亜鉛素子体４ａの高電圧側の取付け金
具５の端部の電界強度は、シ−ルド１３によって緩和さ
れ、ここから絶縁破壊しないようにしている。高電圧側
の取付け金具５は、位置１４からガス絶縁開閉装置の高
電圧導体（図示せず）に接続されている。一方、酸化亜
鉛素子体４ａの低電圧側の取付け金具６には本実施例に
よる過電圧抑制装置の開閉装置部３の雌部電極７が装着
されており、低電圧側の取付け金具６と雌部電極７の端
部電界強度は、シ−ルド１５によって緩和され、ここか
ら絶縁破壊しないようにしている。本実施例による過電
圧抑制装置の開閉装置部３の雄部電極８は、雌部電極７
に対向してタンク９の端部１６側に設置されており、操
作棒１７によって開閉される。操作棒１７は、操作箱１
８内に設けられたクランク１９の作用により補助金具２
０を介して開閉駆動される。操作箱１８内の駆動部は、
図示しなかった。That is, FIG. 1 is a structural view of an overvoltage suppressing device according to the present invention, which is a zinc oxide element body 4a of a non-linear resistor.
Shows the case where the switch is arranged on the high voltage side and the switchgear unit 3 is arranged on the ground side. This arrangement is made because the opening / closing device section 3 is required to perform a high-speed opening / closing operation and the weight of the operation section is to be reduced as much as possible. When the switchgear unit 3 is installed on the high voltage side, at least the weight of the insulating operating rod is heavy, which is disadvantageous. A high pressure SF 6 gas 10 is enclosed in a metal pressure tank 9 which is grounded, and a plurality of stacked zinc oxide element bodies 4a are fixed to the tank 9 by insulating supports 11 and 12. The electric field strength at the end of the fitting 5 on the high voltage side of the zinc oxide element body 4a is moderated by the shield 13 so as not to cause dielectric breakdown. The high voltage side fitting 5 is connected from position 14 to a high voltage conductor (not shown) of the gas insulated switchgear. On the other hand, the female electrode 7 of the switchgear unit 3 of the overvoltage suppressing device according to the present embodiment is mounted on the low-voltage side mounting bracket 6 of the zinc oxide element body 4a. The electric field strength at the end portion of the electrode 7 is relaxed by the shield 15 so as not to cause dielectric breakdown from there. The male electrode 8 of the switchgear 3 of the overvoltage suppressing device according to the present embodiment is the female electrode 7.
It is installed on the end 16 side of the tank 9 so as to face and is opened and closed by the operation rod 17. The operation rod 17 is the operation box 1
Auxiliary metal fitting 2 by the action of the crank 19 provided in
It is opened and closed via 0. The drive unit in the operation box 18 is
Not shown.
【００１０】この過電圧抑制装置の概略等価回路が図２
に示されている。これら図１、図２から酸化亜鉛素子は
優れた非直線抵抗特性を示すが、固有のキャパシタンス
Ｃ１を有しており、複数個積み重ねられた酸化亜鉛素子
体４ａの直列キャパシタンスをＣ０とする。酸化亜鉛素
子体４ａは、常時運転されている電圧に対しては抵抗値
が大きくなり、キャパシタンスとして作用する。また、
酸化亜鉛素子体４ａのユニットは、タンク９に対して浮
遊キャパシタンスＣ２を有する。さらに、過電圧抑制装
置の開閉装置部３となる酸化亜鉛素子体４ａの低電圧側
の取付け金具６、雌部電極７びシ−ルド１５とタンク９
及び雄部電極８との間にキャパシタンスＣ３と絶縁支持
物１２のキャパシタンスＣ４の和のＣ５が存在する。な
お図２で、Ｈは酸化亜鉛素子体４ａの高電圧側であり、
Ｌは低電圧側、Ｅは接地されたタンク９である。A schematic equivalent circuit of this overvoltage suppressing device is shown in FIG.
Is shown in. 1 and 2, the zinc oxide element exhibits excellent non-linear resistance characteristics, but has a specific capacitance C1, and the series capacitance of a plurality of zinc oxide element bodies 4a stacked is C0. The zinc oxide element body 4a has a large resistance value with respect to a voltage which is constantly operated, and acts as a capacitance. Also,
The unit of the zinc oxide element body 4a has a stray capacitance C2 with respect to the tank 9. Further, the metal fitting 6 on the low voltage side of the zinc oxide element body 4a, which serves as the switchgear portion 3 of the overvoltage suppressing device, the female electrode 7 and the shield 15, and the tank 9 are provided.
C5, which is the sum of the capacitance C3 and the capacitance C4 of the insulating support 12, exists between the male electrode 8 and the male electrode 8. In FIG. 2, H is the high voltage side of the zinc oxide element body 4a,
L is a low voltage side, and E is a grounded tank 9.
【００１１】開閉装置部３を含めて酸化亜鉛素子体４ａ
の長さ方向に沿う電位分布は、例えば、縦軸に電位Ｖ
（％）をとり、横軸に長さＤ（％）をとって示した図３
に示されている。同図で１００％の電位は常時運転され
ている電圧波高値を、１００％の長さは酸化亜鉛素子体
４ａから雄部電極８（共に図１参照）の表面までの距離
を示している。仮りに、酸化亜鉛素子体４ａの低電圧側
の取付け金具６から雌部電極７まで長いガス母線で接続
されているような場合、開閉装置部３（いずれも図１参
照）の等価キャパシタンスＣ５が大き過ぎることにな
る。酸化亜鉛素子体４ａ（図１参照）の低電圧側の電位
Ｖ０１が低くなり、従って、電位分布は曲線Ｑ1のよう
に図中点線表示の１００％間の直線より内側になる。酸
化亜鉛素子体４ａ（図１参照）の高電圧側の素子単体に
かかる分担電圧はその曲線Ｑ1の勾配であり、必要以上
に高くなる。これによって酸化亜鉛素子体４ａ（図１参
照）が熱暴走したり、劣化したりする。この問題を回避
するため本実施例では、図１のように酸化亜鉛素子体４
ａの低電圧側の取付け金具６と開閉装置部３の雌部電極
７を一体化してタンク９に設置した。Zinc oxide element body 4a including switchgear unit 3
The potential distribution along the length direction of the
(%) And the length D (%) plotted on the horizontal axis in FIG.
Is shown in. In the figure, the potential of 100% indicates the voltage peak value during constant operation, and the length of 100% indicates the distance from the zinc oxide element body 4a to the surface of the male electrode 8 (both see FIG. 1). If it is assumed that the zinc oxide element body 4a is connected to the female electrode 7 from the mounting bracket 6 on the low voltage side by a long gas busbar, the equivalent capacitance C5 of the switchgear unit 3 (see FIG. 1 for all) is It will be too big. The potential V01 on the low voltage side of the zinc oxide element body 4a (see FIG. 1) becomes low, so that the potential distribution is inside the straight line between 100% indicated by the dotted line in the figure as shown by the curve Q 1 . The shared voltage applied to the single element on the high voltage side of the zinc oxide element body 4a (see FIG. 1) is the slope of the curve Q 1 and is higher than necessary. As a result, the zinc oxide element body 4a (see FIG. 1) causes thermal runaway or deterioration. In order to avoid this problem, in this embodiment, as shown in FIG.
The fitting 6 on the low voltage side of a and the female electrode 7 of the switchgear unit 3 were integrated and installed in the tank 9.
【００１２】このようにすることによって、上述のキャ
パシタンスＣ５を低減でき、少なくともキャパシタンス
Ｃ０の約１０倍以下にできる。従って、図３に示されて
いるように低電圧側の電位Ｖ０２を高くでき、電位分布
は曲線Ｑ2のように図中点線表示の１００％間の直線よ
り外側になり、酸化亜鉛素子体の素子単体にかかる分担
電圧を寿命保証値以下に、すなわち、数ｍＡの抵抗分電
流を流した時の酸化亜鉛素子体の電圧値以下に低くでき
る効果があり、常時運転されている電圧に対して酸化亜
鉛素子体が熱暴走したり、劣化したりすることは無くな
る。By doing so, the above-mentioned capacitance C5 can be reduced and can be at least about 10 times or less than the capacitance C0. Therefore, it increases the low-voltage side of the voltage V02 as shown in FIG. 3, the potential distribution becomes outside the straight line between 100% dotted line in the figure shown as curve Q 2, the zinc oxide element body There is an effect that the shared voltage applied to the element alone can be reduced to the life guarantee value or less, that is, to the voltage value of the zinc oxide element body when a resistance current of several mA is flowed, which is lower than the voltage which is constantly operated. The zinc oxide element body does not run away thermally or deteriorate.
【００１３】このように本実施例によれば開閉装置部と
複数個積み重ねられた非直線抵抗体とを直列に接続する
過電圧抑制装置において、常時運転されている電圧に対
して非直線抵抗体が熱暴走したり、劣化したりしないよ
うな過電圧抑制装置とすることができる効果がある。As described above, according to the present embodiment, in the overvoltage suppressing device in which the switchgear section and a plurality of stacked non-linear resistors are connected in series, the non-linear resistors are applied to the voltage which is constantly operated. There is an effect that it is possible to provide an overvoltage suppressing device that does not cause thermal runaway or deterioration.
【００１４】〔実施例 ２〕図４には本発明の他の実施
例が示されている。本実施例では酸化亜鉛素子体４ａの
高電圧側にリング状の電位制御シ−ルド２１を設置し
た。このようにすることにより、前述の場合よりも電位
分担制御の自由度を大きくすることができる。電位制御
シ−ルド２１の断面形状は必ずしも円状でなくても良
く、楕円状等でも良い。また、その数は任意であり、直
径も限定されない。[Embodiment 2] FIG. 4 shows another embodiment of the present invention. In this embodiment, a ring-shaped potential control shield 21 is provided on the high voltage side of the zinc oxide element body 4a. By doing so, the degree of freedom in potential sharing control can be increased as compared with the case described above. The cross-sectional shape of the potential control shield 21 does not necessarily have to be circular, and may be elliptical or the like. Further, the number is arbitrary and the diameter is not limited.
【００１５】〔実施例 ３〕図５には本発明の更に他の
実施例が示されている。本実施例では酸化亜鉛素子体４
ａに並列にインピ−ダンス２２を設置した。このように
することにより、前述の場合よりも酸化亜鉛素子体４ａ
にかかる電圧を低減することができるので、前述の場合
に比べ容易に、確実に酸化亜鉛素子単体にかかる分担電
圧を保証値以下に低くすることができる。また、開閉装
置部３にも並列にインピ−ダンス（図示せず）を設置す
れば、酸化亜鉛素子体４ａの低電圧側の電位設定が容易
となる効果がある。このインピ−ダンスとして抵抗、イ
ンダクタンスも考えられるが、コンデンサを用いるの
が、定常時および動作時の損失が無視できるほど小さ
い、共振現象が発生しない、絶縁性能を確保しやすい等
の理由により信頼性が高く、得策である。高気圧ガス中
で使用するのでコンデンサの中でもセラミックコンデン
サが望ましい。[Embodiment 3] FIG. 5 shows still another embodiment of the present invention. In this embodiment, the zinc oxide element body 4
The impedance 22 is installed in parallel with a. By doing so, the zinc oxide element body 4a can be made more than the above case.
Since the voltage applied to the zinc oxide element can be reduced, it is possible to easily and surely lower the shared voltage applied to the zinc oxide element alone to the guaranteed value or less, as compared with the case described above. Further, if an impedance (not shown) is installed in parallel also in the switchgear unit 3, there is an effect that the potential setting on the low voltage side of the zinc oxide element body 4a becomes easy. Resistance and inductance can be considered as the impedance, but the use of a capacitor is reliable because the loss during steady state and operation is negligible, resonance phenomenon does not occur, and insulation performance is easily secured. Is high and a good idea. Ceramic capacitors are desirable among capacitors because they are used in high pressure gas.
【００１６】〔実施例 ４〕図６には本発明の更に他の
実施例が示されている。本実施例は図５の変形例でイン
ピ−ダンス２２を並列構成の酸化亜鉛素子体４ａの中央
に設置したものである。このようにすることにより、前
述の場合より対称な構造であり、絶縁設計が行いやす
い。[Embodiment 4] FIG. 6 shows still another embodiment of the present invention. This embodiment is a modification of FIG. 5 in which the impedance 22 is installed in the center of the zinc oxide element body 4a having a parallel configuration. By doing so, the structure is more symmetrical than in the case described above, and the insulation design is easier to perform.
【００１７】〔実施例 ５〕図７には本発明の更に他の
実施例が示されている。本実施例は図４の変形例で開閉
装置部３に雌部電極７、雄部電極部８間を覆って絶縁支
持筒２３を設置した（図４の支持物５を取り除いた）。
これによって、酸化亜鉛素子体４ａを開閉装置部３で発
生した分解ガスに触れないようにすることができ、酸化
亜鉛素子の信頼性を向上させることができる。[Embodiment 5] FIG. 7 shows still another embodiment of the present invention. In this embodiment, the insulating support cylinder 23 is installed in the switchgear unit 3 covering the female electrode 7 and the male electrode unit 8 in the modification of FIG. 4 (the support 5 of FIG. 4 is removed).
As a result, the zinc oxide element body 4a can be prevented from coming into contact with the decomposed gas generated in the switchgear unit 3, and the reliability of the zinc oxide element can be improved.
【００１８】〔実施例 ６〕図８には本発明の更に他の
実施例が示されている。本実施例は図７の変形例で絶縁
スペ−サ２４によってタンク９を仕切り、開閉装置部３
と酸化亜鉛素子体４ａとを隔離した。これによって、前
述の場合に比べ絶縁スペ−サ２４が開閉装置部３から遠
ざかったので発生したア−クが絶縁スペーサ２４に接触
しにくくなり、絶縁信頼性が前述の場合より向上する。[Sixth Embodiment] FIG. 8 shows still another embodiment of the present invention. In this embodiment, the tank 9 is partitioned by the insulating spacer 24 in the modification of FIG.
And the zinc oxide element body 4a were isolated. As a result, since the insulating spacer 24 is farther from the switchgear unit 3 than in the case described above, the arc generated is less likely to contact the insulating spacer 24, and the insulation reliability is improved as compared with the case described above.
【００１９】以上、開閉装置部３と酸化亜鉛素子体４ａ
とを接地された金属製の圧力タンク９内に設置する場合
を示したが、それぞれを別の接地された金属製の圧力タ
ンクに設置することもできる。この場合、別々の圧力タ
ンクは絶縁スペ−サを介して結合され、図８と同様な効
果があり、圧力タンクの寸法、配置に関する自由度が大
きくなる効果もある。ただし、開閉装置部３の等価キャ
パシタンスＣ５が不用意に大きくならないようにする必
要がある。As described above, the switchgear unit 3 and the zinc oxide element body 4a
Although the case where and are installed in the grounded metal pressure tank 9 is shown, they may be installed in different grounded metal pressure tanks. In this case, separate pressure tanks are connected via an insulating spacer, and the same effect as in FIG. 8 is obtained, and there is also an effect that the degree of freedom regarding the size and arrangement of the pressure tank is increased. However, it is necessary to prevent the equivalent capacitance C5 of the switchgear unit 3 from unintentionally increasing.
【００２０】〔実施例 ７〕図９には本発明の更に他の
実施例が示されている。本実施例は同図に示すように開
閉装置部３ａに絶縁操作棒１７ａを取り付けても、高速
に開閉操作できる性能があれば開閉装置部３ａを高電圧
側に、酸化亜鉛素子体４ｂを接地側に設置できる。開閉
装置部３ａは雌部電極７に対抗した雄部電極８ａで構成
され、雄部電極８ａは絶縁操作棒１７ａを介して開閉操
作される。この場合、開閉装置部３ａとタンク９との間
の浮遊キャパシタンスは酸化亜鉛素子体４ｂにかかる電
圧分担を低下するよう作用するので、上記のように酸化
亜鉛素子体４ｂの素子単体にかかる分担電圧を寿命保証
値以下に、あるいは、数ｍＡの抵抗分電流を流した時の
酸化亜鉛素子体４ｂの電圧値以下に低くしやすくでき
る。なお同図において２５はシールドである。[Embodiment 7] FIG. 9 shows still another embodiment of the present invention. In this embodiment, as shown in the same figure, even if the insulating operating rod 17a is attached to the switchgear unit 3a, if the switchgear unit 3a has a high voltage side, the switchgear unit 3a is on the high voltage side and the zinc oxide element body 4b is grounded. Can be installed on the side. The opening / closing device portion 3a is composed of a male portion electrode 8a that opposes the female portion electrode 7, and the male portion electrode 8a is opened / closed via an insulating operating rod 17a. In this case, since the stray capacitance between the switchgear unit 3a and the tank 9 acts to reduce the voltage sharing applied to the zinc oxide element body 4b, the sharing voltage applied to the element alone of the zinc oxide element body 4b as described above. Can be easily lowered to a life guarantee value or less, or to a voltage value of the zinc oxide element body 4b when a resistance current of several mA is passed. In the figure, 25 is a shield.
【００２１】〔実施例 ８〕図１０には本発明の更に他
の実施例が示されている。本実施例は同図に示されてい
るように非直線抵抗体（酸化亜鉛素子体）４ａと開閉装
置部３とを、別々の接地された圧力タンク９、２６に収
納し、かつこれら両者を金属導体２７で接続した。この
ようにすることにより圧力タンクを圧力タンク９、２６
に分割できること、かつ金属導体２７を使うことによっ
て過電圧抑制装置の構造に若干の選択性を持たすことが
できるようになる。[Embodiment 8] FIG. 10 shows still another embodiment of the present invention. In this embodiment, as shown in the figure, the non-linear resistor (zinc oxide element body) 4a and the switchgear unit 3 are housed in separate grounded pressure tanks 9 and 26, and both of them are accommodated. It was connected by the metal conductor 27. By doing so, the pressure tank is replaced by the pressure tanks 9 and 26.
By using the metal conductor 27, the structure of the overvoltage suppressing device can be provided with some selectivity.
【００２２】[0022]
【発明の効果】上述のように本発明は、装置に、常時運
転されている系統電圧に対して非直線抵抗体の単体にか
かる分担電圧を寿命保証値以下にする手段を設けたの
で、常時運転されている電圧に対して開閉装置部と複数
個積み重ねられた非直線抵抗体の電圧分担を制御でき、
非直線抵抗体にかかる電圧を保証値以下、非直線抵抗体
が酸化亜鉛素子である場合、これに数ｍＡの抵抗分電流
を流した時の電圧値以下にできるようになって、常時運
転されている電圧に対して非直線抵抗体が熱暴走した
り、劣化したりしないことを可能とした過電圧抑制装置
を得ることができる。As described above, according to the present invention, since the device is provided with means for making the shared voltage applied to the single non-linear resistor to the system voltage which is constantly operating less than the guaranteed life value, It is possible to control the voltage sharing of the non-linear resistors stacked with the switchgear section for the operating voltage,
The voltage applied to the non-linear resistor can be kept below the guaranteed value, and if the non-linear resistor is a zinc oxide element, the voltage can be kept below the voltage value when a resistance current of several mA is applied to the non-linear resistor. It is possible to obtain an overvoltage suppressing device that can prevent the non-linear resistor from causing thermal runaway or deterioration with respect to the applied voltage.
【図１】本発明の過電圧抑制装置の一実施例の縦断側面
図である。FIG. 1 is a vertical sectional side view of an embodiment of an overvoltage suppressing device of the present invention.
【図２】同じく一実施例の過電圧抑制装置の運転電圧に
対する等価回路図である。FIG. 2 is an equivalent circuit diagram for an operating voltage of the overvoltage suppressing device according to the embodiment.
【図３】同じく一実施例と従来例の過電圧抑制装置の運
転電圧に対する電位分布特性図である。FIG. 3 is a potential distribution characteristic diagram with respect to an operating voltage of the overvoltage suppressing device according to the embodiment and the conventional example.
【図４】本発明の過電圧抑制装置の他の実施例の縦断側
面図である。FIG. 4 is a vertical sectional side view of another embodiment of the overvoltage suppressing device according to the present invention.
【図５】本発明の過電圧抑制装置の更に他の実施例の縦
断側面図である。FIG. 5 is a vertical sectional side view of still another embodiment of the overvoltage suppressing device of the present invention.
【図６】本発明の過電圧抑制装置の更に他の実施例の縦
断側面図である。FIG. 6 is a vertical sectional side view of still another embodiment of the overvoltage suppressing device according to the present invention.
【図７】本発明の過電圧抑制装置の更に他の実施例の縦
断側面図である。FIG. 7 is a vertical sectional side view of still another embodiment of the overvoltage suppressing device according to the present invention.
【図８】本発明の過電圧抑制装置の更に他の実施例の縦
断側面図である。FIG. 8 is a vertical sectional side view of still another embodiment of the overvoltage suppressing device of the present invention.
【図９】本発明の過電圧抑制装置の更に他の実施例の縦
断側面図である。FIG. 9 is a vertical sectional side view of still another embodiment of the overvoltage suppressing device of the present invention.
【図１０】本発明の過電圧抑制装置の更に他の実施例の
縦断側面図である。FIG. 10 is a vertical sectional side view of still another embodiment of the overvoltage suppressing device according to the present invention.
【図１１】従来の過電圧抑制装置の回路図である。FIG. 11 is a circuit diagram of a conventional overvoltage suppressing device.
１…電力系統、３、３ａ…開閉装置部、４…非直線抵抗
体、４ａ、４ｂ…酸化亜鉛素子体、５…高電圧側の取付
け金具、６…低電圧側の取付け金具。７…雌部電極、
８、８ａ…雄部電極、９…接地された金属製の圧力タン
ク、２１…電位制御シールド、２２…インピーダンス、
２３…絶縁支持筒、２４…絶縁スペーサ。２６…接地さ
れた金属製の圧力タンク、２７…金属導体。DESCRIPTION OF SYMBOLS 1 ... Electric power system, 3 3a ... Switchgear part, 4 ... Non-linear resistance body, 4a, 4b ... Zinc oxide element body, 5 ... High-voltage side mounting metal fitting, 6 ... Low-voltage side mounting metal fitting. 7 ... Female part electrode,
8, 8a ... Male electrode, 9 ... Grounded metal pressure tank, 21 ... Potential control shield, 22 ... Impedance,
23 ... Insulating support tube, 24 ... Insulating spacer. 26 ... Grounded metal pressure tank, 27 ... Metal conductor.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 大野 政智 茨城県日立市国分町一丁目１番１号 株式 会社日立製作所国分工場内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masatomo Ohno 1-1-1 Kokubuncho, Hitachi-shi, Ibaraki Hitachi Kokubun Plant, Ltd.
Claims (12)
付け金具でそれぞれ接続された非直線抵抗体と、電力系
統の事故電流遮断に先行して投入され、かつ対向配置さ
れた雌部電極および雄部電極を有する開閉装置部とが接
地された金属製の圧力タンク内に直列に接続されている
過電圧抑制装置において、前記装置に、常時運転されて
いる系統電圧に対して前記非直線抵抗体の単体にかかる
分担電圧を寿命保証値以下にする手段が設けられている
ことを特徴とする過電圧抑制装置。1. A non-linear resistor having a plurality of layers stacked and having both ends connected to each other by mounting metal fittings, and a female electrode and a male which are inserted prior to interruption of a fault current in a power system and are arranged to face each other. In an overvoltage suppressing device in which a switchgear unit having a partial electrode is connected in series in a grounded metal pressure tank, the device has a non-linear resistance of the non-linear resistor with respect to a system voltage that is constantly operating. An overvoltage suppressing device comprising means for reducing the shared voltage applied to a single unit to be equal to or less than a guaranteed life value.
抗体の低電圧側の取付け金具、前記開閉装置部の雌部電
極で形成されたものである請求項１記載の過電圧抑制装
置。2. The overvoltage suppressing device according to claim 1, wherein the means is formed by a mounting member on the low-voltage side of the integrated non-linear resistor and a female electrode of the switchgear unit.
抗体の低電圧側の取付け金具、前記開開閉装置部の雌部
電極と、前記非直線抵抗体の高電圧側に設けられた電位
制御シールドとで形成されたものである請求項１記載の
過電圧抑制装置。3. The means is provided on the low voltage side fitting of the integrated non-linear resistor, the female electrode of the opening / closing device section, and the high voltage side of the non-linear resistor. The overvoltage suppressing device according to claim 1, which is formed by a potential control shield.
抗体の低電圧側の取付け金具、前記開閉装置部の雌部電
極と、前記非直線抵抗体の外側に並列接続されたインピ
ーダンスとで形成されたものである請求項１記載の過電
圧抑制装置。4. The low voltage side fitting of the non-linear resistor, the female electrode of the switchgear unit, and the impedance connected in parallel to the outside of the non-linear resistor, wherein the means are integrated. The overvoltage suppressing device according to claim 1, which is formed by.
抗体の低電圧側の取付け金具、前記開閉装置部の雌部電
極と、前記非直線抵抗体の中央部に並列接続されたイン
ピーダンスとで形成されたものである請求項１記載の過
電圧抑制装置。5. The impedance connected in parallel to the low-voltage-side mounting metal fitting of the non-linear resistor, the female electrode of the switchgear unit, and the central portion of the non-linear resistor, wherein the means is integrated. The overvoltage suppressing device according to claim 1, wherein the overvoltage suppressing device is formed of
る請求項４または請求項５記載の過電圧抑制装置。6. The overvoltage suppressing device according to claim 4, wherein the impedance is a capacitor.
抗体の低電圧側の取付け金具、前記開閉装置部の雌部電
極と、前記非直線抵抗体の高電圧側に設けられた電位制
御シールドと、前記一体化された取付け金具、雌部電極
の雌部電極と前記雄部電極との間を覆って設けられた絶
縁支持筒とで形成されたものである請求項１記載の過電
圧抑制装置。7. The low-voltage side fitting of the non-linear resistor, the female electrode of the switchgear unit, and the potential provided on the high-voltage side of the non-linear resistor, wherein the means are integrated. The overvoltage according to claim 1, which is formed of a control shield, the integrated mounting member, and an insulating support cylinder provided between the female electrode of the female electrode and the male electrode. Suppressor.
抗体の低電圧側の取付け金具、前記開閉装置部の雌部電
極と、前記非直線抵抗体の高電圧側に設けられた電位制
御シールドと、前記低電圧側の取付け金具と前記圧力タ
ンクとの間に設けられ、かつ前記非直線抵抗体と前記開
閉装置部とを仕切る絶縁スペーサとで形成されたもので
ある請求項１記載の過電圧抑制装置。8. The low-voltage side fitting of the non-linear resistor, the female electrode of the switchgear unit, and the potential provided on the high-voltage side of the non-linear resistor, wherein the means are integrated. 2. The control shield, and an insulating spacer provided between the mounting bracket on the low voltage side and the pressure tank and partitioning the non-linear resistor and the switchgear section. Overvoltage suppressor.
装置部が接地側に配置されたものである請求項１記載の
過電圧抑制装置。9. The overvoltage suppressing device according to claim 1, wherein the non-linear resistor is arranged on the high voltage side, and the switchgear unit is arranged on the ground side.
装置部が高電圧側に配置されたものである請求項１記載
の過電圧抑制装置。10. The overvoltage suppressing device according to claim 1, wherein the non-linear resistor is arranged on the ground side, and the switchgear unit is arranged on the high voltage side.
である請求項１記載の過電圧抑制装置。11. The overvoltage suppressing device according to claim 1, wherein the non-linear resistor is a zinc oxide element body.
別々の接地された圧力タンクに収納され、かつこれら両
者が金属導体で接続されたものである請求項１記載の過
電圧抑制装置。12. The non-linear resistor and the opening / closing device section,
The overvoltage suppressing device according to claim 1, wherein the overvoltage suppressing devices are housed in separate grounded pressure tanks and are connected by a metal conductor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4080676A JPH05284646A (en) | 1992-04-02 | 1992-04-02 | Overvoltage suppresser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4080676A JPH05284646A (en) | 1992-04-02 | 1992-04-02 | Overvoltage suppresser |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05284646A true JPH05284646A (en) | 1993-10-29 |
Family
ID=13724961
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4080676A Pending JPH05284646A (en) | 1992-04-02 | 1992-04-02 | Overvoltage suppresser |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05284646A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101479192B1 (en) * | 2007-09-10 | 2015-01-05 | 에이비비 테크놀로지 아게 | Closing resistor for high-voltage circuit breakers |
| CN108270208A (en) * | 2016-12-30 | 2018-07-10 | 安徽新在线科技股份有限公司 | A kind of generator neutral point is grounded nonlinear resistance device |
-
1992
- 1992-04-02 JP JP4080676A patent/JPH05284646A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101479192B1 (en) * | 2007-09-10 | 2015-01-05 | 에이비비 테크놀로지 아게 | Closing resistor for high-voltage circuit breakers |
| CN108270208A (en) * | 2016-12-30 | 2018-07-10 | 安徽新在线科技股份有限公司 | A kind of generator neutral point is grounded nonlinear resistance device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1577904B1 (en) | High voltage bushing with element for electric-field control | |
| US7679023B2 (en) | Switchgear | |
| CN102024610A (en) | Circuit breaker | |
| JPH05284646A (en) | Overvoltage suppresser | |
| WO2023021842A1 (en) | Gas-insulated switching device | |
| EP1911057B1 (en) | Electrical switchgear | |
| US5959823A (en) | Tank-type surge arrester | |
| JP3712456B2 (en) | Gas insulated disconnect switch | |
| JP3031174B2 (en) | Gas circuit breaker | |
| JP4811331B2 (en) | Switchgear | |
| EP0768684A2 (en) | Current transformer with annular core to be built in a metal cast high-tension switchgear installation | |
| JPH0719708B2 (en) | Gas insulated pole transformer | |
| JPS6027132B2 (en) | butsing | |
| JPH04207917A (en) | Gas insulated electric apparatus | |
| JPS62142Y2 (en) | ||
| JP2986846B2 (en) | Gas disconnector | |
| JP2001052550A (en) | Hollow composite insulator | |
| EP1074999A1 (en) | Hollow core composite insulator | |
| JPH0683524B2 (en) | Gas insulated electrical equipment | |
| JPH1051913A (en) | Gas insulated composite switchgear | |
| JPS6158415A (en) | Conduit bus | |
| JPH077623B2 (en) | Gas insulated disconnector | |
| JP2002135920A (en) | Voltage transformer | |
| JPH0320849B2 (en) | ||
| JPS59209011A (en) | Device for grounding gas insulated switching unit |