JPH08222058A - Insulator washing method, and insulator washing device - Google Patents
Insulator washing method, and insulator washing deviceInfo
- Publication number
- JPH08222058A JPH08222058A JP2242795A JP2242795A JPH08222058A JP H08222058 A JPH08222058 A JP H08222058A JP 2242795 A JP2242795 A JP 2242795A JP 2242795 A JP2242795 A JP 2242795A JP H08222058 A JPH08222058 A JP H08222058A
- Authority
- JP
- Japan
- Prior art keywords
- insulator
- cleaning
- valve
- speed
- water
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Insulators (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、ブッシングのような縦
長の碍子の活線洗浄に用いられる碍子洗浄方法及び碍子
洗浄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 insulator cleaning method and an insulator cleaning apparatus used for hot-line cleaning of a vertically elongated insulator such as a bushing.
【０００２】[0002]
【従来の技術】ブッシングのような縦長の碍子の活線洗
浄は、碍子の周囲に配置されたいくつかの洗浄用ノズル
から、例えば30kg/cm2程度の高圧の洗浄水を碍子表面に
向かって放水する方法により行われている。この放水中
は碍子表面を洗浄水が流下するが、それによって絶縁破
壊が生じないように洗浄水の水量や水質が設定されてい
る。2. Description of the Related Art For the live-line cleaning of a vertically long insulator such as a bushing, high-pressure cleaning water of, for example, about 30 kg / cm 2 is directed toward the surface of the insulator from several cleaning nozzles arranged around the insulator. It is done by the method of discharging water. The wash water flows down the surface of the insulator during this discharge, but the amount and quality of the wash water are set so that dielectric breakdown does not occur.
【０００３】ところが特定の条件下においては、上記の
ような碍子洗浄の終了時に碍子頂部において発光と音を
伴うストリーマと呼ばれる気中絶縁破壊が生ずることが
分かった。本発明者の推測によれば、このストリーマの
発生メカニズムは次のとおりであると考えられる。However, it has been found that under specific conditions, at the end of the above-mentioned insulator cleaning, air insulation breakdown called streamer accompanied by light emission and sound occurs at the top of the insulator. According to the inventor's speculation, the mechanism of occurrence of this streamer is considered to be as follows.
【０００４】すなわち、碍子洗浄終了時においては碍子
表面に対する洗浄水の衝突速度が低下するため、注水さ
れた洗浄水が飛び散ることなくその大部分が碍子表面を
流下することとなり、それまでよりも流下流量が増加す
る。しかもこれと同時に碍子表面への洗浄水到達点も下
降する。このため、洗浄水の流下速度が洗浄水到達点の
下降速度と一致すると、碍子表面の洗浄水到達点よりも
下側の部分ではほぼ連続した水流が形成されてしまい、
碍子の電位分担が著しく変化して注水されなくなった碍
子の上部に電位が集中し、気中絶縁破壊に至るものと考
えられる。この状態の電位分担を図５に示す。That is, at the end of the insulator cleaning, the collision speed of the cleaning water with respect to the insulator surface decreases, so that most of the injected cleaning water flows down on the insulator surface without scattering, and it flows down more than before. The flow rate increases. Moreover, at the same time, the point where the washing water reaches the surface of the insulator also drops. For this reason, if the flow rate of the wash water matches the descending rate of the wash water arrival point, a substantially continuous water flow will be formed in the portion of the insulator surface below the wash water arrival point,
It is considered that the electric potential distribution of the insulator changes significantly and the electric potential concentrates on the upper part of the insulator where water injection is stopped, leading to air dielectric breakdown. The potential sharing in this state is shown in FIG.
【０００５】[0005]
【発明が解決しようとする課題】本発明は上記した従来
の問題点を解決し、碍子洗浄終了時におけるストリーマ
の発生を防止した碍子洗浄方法及びこれに使用される碍
子洗浄装置を提供するためになされたものである。SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems of the prior art, and provides an insulator cleaning method and an insulator cleaning device used therefor in which streamers are prevented from occurring at the end of insulator cleaning. It was made.
【０００６】[0006]
【課題を解決するための手段】上記の課題を解決するた
めになされた本発明の碍子洗浄方法は、碍子洗浄終了時
にノズル元水圧を急速に低下させることにより、碍子表
面における洗浄水到達点の下降速度を碍子表面の洗浄水
の流下速度よりも大きくしてストリーマの発生を防止す
ることを特徴とするものである。また本発明の碍子洗浄
装置は、碍子洗浄用ポンプとノズルとの間に設けられた
洗浄区画弁に、その閉弁速度を変換する制御系を接続し
たことを特徴とするものである。The insulator cleaning method of the present invention, which was made to solve the above-mentioned problems, is designed to reduce the water pressure at the nozzle base at the end of insulator cleaning so that the cleaning water reaching point on the insulator surface is reached. It is characterized in that the descending speed is made higher than the flowing speed of the washing water on the insulator surface to prevent the generation of streamers. Further, the insulator cleaning apparatus of the present invention is characterized in that a cleaning partition valve provided between the insulator cleaning pump and the nozzle is connected to a control system for converting the valve closing speed.
【０００７】[0007]
【作用】本発明の碍子洗浄方法は、碍子洗浄終了時にノ
ズル元水圧を急速に低下させることにより、碍子表面に
おける洗浄水到達点の下降速度を碍子表面の洗浄水の流
下速度よりも大きくする。このため、従来のように洗浄
水の流下速度が洗浄水到達点の下降速度と一致すること
が防止され、洗浄水到達点よりも下側の部分に連続した
水流が形成されることもなくなるため、ストリーマの発
生を防止することができる。また本発明の碍子洗浄装置
によれば、碍子洗浄用ポンプとノズルとの間に設けられ
た洗浄区画弁に接続された制御系が洗浄区画弁の閉弁速
度を変換し、碍子洗浄終了時において洗浄区画弁を急速
に閉じる。これによってノズル元水圧を急速に低下さ
せ、ストリーマの発生を防止することができる。In the insulator cleaning method of the present invention, the nozzle base water pressure is rapidly reduced at the end of the insulator cleaning so that the descending speed of the cleaning water reaching point on the insulator surface is made faster than the cleaning water flowing speed on the insulator surface. For this reason, it is possible to prevent the flow rate of the wash water from matching with the descending speed of the wash water arrival point unlike the conventional case, and it is not necessary to form a continuous water flow in the portion below the wash water arrival point. The occurrence of streamers can be prevented. Further, according to the insulator cleaning apparatus of the present invention, the control system connected to the cleaning partition valve provided between the insulator cleaning pump and the nozzle converts the closing speed of the cleaning partition valve, and at the end of the insulator cleaning. Close the wash compartment valve rapidly. As a result, the nozzle base water pressure can be rapidly reduced, and the occurrence of streamers can be prevented.
【０００８】[0008]
【実施例】以下に本発明を図示の実施例によって更に詳
細に説明する。図１は碍子洗浄の配管系統図であり、１
はブッシングのような縦長の碍子、２はその周囲に配置
されたノズル、３は貯水タンク、４は碍子洗浄用ポン
プ、５は洗浄区画弁である。The present invention will be described below in more detail with reference to the illustrated embodiments. Fig. 1 is a piping system diagram for insulator cleaning.
Is a vertically elongated insulator such as a bushing, 2 is a nozzle arranged around the insulator, 3 is a water storage tank, 4 is an insulator cleaning pump, and 5 is a cleaning partition valve.
【０００９】ここでノズル元水圧をＰN 、ポンプの吐出
圧力をＰ0 、配管摩擦損失水頭をＰa 、弁の損失水頭を
Ｐv 、ノズル高さの水頭をＰh とすると、ノズル元水圧
ＰN ＝Ｐ0 −（Ｐa ＋Ｐv ＋Ｐh ）となる。このポンプ
の吐出圧力Ｐ0 は吐出量によって変化し、配管摩擦損失
水頭をＰa は管の長さ、サイズ、流量により変化し、弁
の損失水頭をＰv も弁の開口度と流量により求められ
る。そこで流量の変化に伴う各圧力の変化を図示すると
図２のようになる。Assuming that the nozzle base water pressure is P N , the pump discharge pressure is P 0 , the pipe friction loss head is P a , the valve head loss is P v , and the head height at the nozzle is P h , the nozzle head water pressure is P N = P 0 − (P a + P v + P h ). The discharge pressure P 0 of this pump changes depending on the discharge amount, the pipe friction loss head P a changes depending on the pipe length, size, and flow rate, and the valve loss head P v is also determined by the valve opening degree and flow rate. To be Then, the change of each pressure accompanying the change of the flow rate is illustrated in FIG.
【００１０】次に、洗浄開始から終了までのノズル元水
圧ＰN の変化を図３に示す。このグラフに示すように、
洗浄終了指令を受けると洗浄区画弁５は閉じ、それに連
れてノズル元水圧ＰN も例えば30kg/cm2からゼロまで低
下する。本発明では、碍子洗浄終了時においてノズル元
水圧ＰN を急速に低下させることにより、ストリーマの
発生を防止する。具体的には、碍子１が500KV のブッシ
ングであって耐風性能が７m/sec 以上の碍子洗浄装置の
場合には、碍子洗浄終了時におけるノズル元水圧ＰN の
低下率を3kg/cm2/sec 以上とすることが好ましい。ま
た、耐風性能が10m/sec 以上の碍子洗浄装置の場合に
は、碍子洗浄終了時におけるノズル元水圧ＰN の低下率
を4kg/cm2/sec 以上とすることが好ましい。このような
速度でノズル元水圧ＰN を低下させれば、洗浄水の流下
速度が洗浄水到達点の下降速度と一致することが防止さ
れ、ストリーマの発生を防止することができる。Next, FIG. 3 shows changes in the nozzle base water pressure P N from the start to the end of cleaning. As shown in this graph,
When the cleaning end command is received, the cleaning partition valve 5 is closed, and the nozzle base water pressure P N is accordingly reduced from 30 kg / cm 2 to zero. In the present invention, the nozzle base water pressure P N is rapidly reduced at the end of the insulator cleaning to prevent the generation of streamers. Specifically, when the insulator 1 is a bushing of 500 KV and the wind resistance is 7 m / sec or more, the decrease rate of the nozzle base water pressure P N at the end of the insulator cleaning is 3 kg / cm 2 / sec. The above is preferable. Further, in the case of an insulator cleaning apparatus having a wind resistance of 10 m / sec or more, it is preferable that the rate of decrease of the nozzle base water pressure P N at the end of insulator cleaning is 4 kg / cm 2 / sec or more. By lowering the nozzle base water pressure P N at such a speed, it is possible to prevent the flow rate of the wash water from matching the descending rate of the wash water reaching point, and to prevent the occurrence of a streamer.
【００１１】このように、急速にノズル元水圧ＰN を低
下させるためには、２つの手段が考えられる。ひとつ
は、Ｃv 値の勾配の大きい洗浄区画弁５を使用すること
である。このＣv 値は米国で弁の流量特性を評価するた
めに定められた値であり、１psi(0.07kg/cm2) の差圧の
ときに弁に流れる流量を米ガロン(1USガロン＝3.785 リ
ットル) で表した値である。このＣv 値は我が国におい
ても広く採用されている。As described above, two means are conceivable for rapidly reducing the nozzle base water pressure P N. One is to use the wash partition valve 5 having a large gradient of C v value. This C v value is a value set in the United States to evaluate the flow rate characteristic of a valve, and the flow rate flowing through the valve at a pressure difference of 1 psi (0.07 kg / cm 2 ) is US gallon (1 US gallon = 3.785 liter). ) Is the value. This C v value is widely adopted in Japan.
【００１２】図４は各種サイズの弁の開度とＣv 値の関
係を示すグラフである。従来の碍子洗浄装置の洗浄区画
弁５に広く使用されてきた125Aの弁に比較して、150A、
200A、250A等の弁は、弁の開度の変化に応じてＣv 値の
勾配が大きく、従来と同一の速度で弁を閉じてもノズル
元水圧ＰN を急速に低下させることが可能となる。従っ
て、Ｃv 値の勾配の大きい洗浄区画弁５を使用すれば本
発明の目的を達成することができる。FIG. 4 is a graph showing the relationship between the valve opening of various sizes and the C v value. Compared with the 125A valve that has been widely used for the cleaning partition valve 5 of the conventional insulator cleaning device, 150A,
Valves such as 200A and 250A have a large gradient of C v value according to the change of the opening of the valve, and it is possible to rapidly reduce the nozzle base water pressure P N even if the valve is closed at the same speed as the conventional one. Become. Therefore, the purpose of the present invention can be achieved by using the cleaning partition valve 5 having a large gradient of C v value.
【００１３】しかし125Aの弁の代わりにそれよりも大口
径の弁を使用することはコスト的には必ずしも好ましい
方法とはいえない場合がある。そこでそのような場合に
は、洗浄区画弁５を閉じる速度を変化させてもよいが、
洗浄区画弁５を閉じる際に生ずる水撃圧力は洗浄区画弁
５の閉弁速度と比例の関係にあり、速度を増すほど水撃
圧力は上昇する。従って、洗浄区画弁５の閉弁速度をむ
やみに速くすることは得策ではない。すなわち、洗浄区
画弁５の閉弁速度はストリーマの発生しない領域で、か
つ水撃圧力が許容される速度が望ましく、洗浄区画弁５
の閉弁速度を段階的に変換できるようにしておくことが
好ましい。However, using a valve having a larger diameter than the 125A valve may not always be a preferable method in terms of cost. Therefore, in such a case, the closing speed of the cleaning partition valve 5 may be changed,
The water hammer pressure generated when the cleaning partition valve 5 is closed is proportional to the closing speed of the cleaning partition valve 5, and the water hammer pressure increases as the speed increases. Therefore, it is not a good idea to unnecessarily increase the closing speed of the cleaning partition valve 5. That is, the closing speed of the cleaning partition valve 5 is preferably in a region where streamers do not occur and at which the water hammer pressure is allowed.
It is preferable that the valve closing speed can be converted stepwise.
【００１４】そこで、ふたつめの方法としては図１に示
したように洗浄区画弁５に閉弁速度を変換する制御系６
を接続しておく。実施例では、洗浄区画弁５を駆動する
モータを誘導モータとしておき、この誘導モータに周波
数変換器を備えた制御系６を接続してある。例えば商用
周波数が60Hzの場合、周波数変換器により周波数を180
Hzに変換すれば、誘導モータを３倍の速度で回転させる
ことができるから、碍子洗浄終了時に洗浄区画弁５を急
速に閉じてノズル元水圧ＰN を急速に低下させることが
可能となる。また、洗浄区画弁５を駆動するモータをパ
ルスモータとしておき、単位時間当りに与えるパルス量
を増大させることによっても同様な結果を得ることがで
きる。以上に述べたいずれの方法によっても、ストリー
マの発生を防止することが可能となる。Therefore, as a second method, as shown in FIG. 1, the control system 6 for converting the valve closing speed to the cleaning partition valve 5 is used.
Is connected. In the embodiment, the motor for driving the cleaning partition valve 5 is an induction motor, and the induction motor is connected to the control system 6 having a frequency converter. For example, if the commercial frequency is 60Hz, the frequency converter
If the frequency is converted to Hz, the induction motor can be rotated at a speed three times faster, so that the cleaning partition valve 5 can be rapidly closed at the end of the insulator cleaning, and the nozzle base water pressure P N can be rapidly reduced. Further, a similar result can be obtained by setting a motor for driving the cleaning partition valve 5 as a pulse motor and increasing the pulse amount given per unit time. By any of the methods described above, it is possible to prevent the streamer from occurring.
【００１５】[0015]
【発明の効果】以上に説明したように、本発明の碍子洗
浄方法によれば碍子洗浄終了時にノズル元水圧を急速に
低下させることにより、碍子表面の洗浄水到達点を碍子
表面の洗浄水の流下速度よりも速く下降させ、ストリー
マの発生を防止することができる利点がある。また本発
明の碍子洗浄装置によれば、本発明の方法を容易かつ確
実に実施できる利点がある。As described above, according to the insulator cleaning method of the present invention, the nozzle base water pressure is rapidly decreased at the end of insulator cleaning, so that the arrival point of the insulator water on the insulator surface becomes smaller than that on the insulator surface. There is an advantage that the streamer can be lowered faster than the flow-down speed to prevent the generation of streamers. Further, the insulator cleaning apparatus of the present invention has an advantage that the method of the present invention can be carried out easily and reliably.
【図１】碍子洗浄の配管系統図である。FIG. 1 is a piping system diagram for cleaning an insulator.
【図２】流量と系統各部の圧力損失との関係を示すグラ
フである。FIG. 2 is a graph showing the relationship between the flow rate and the pressure loss of each part of the system.
【図３】碍子洗浄時のノズル元水圧の変化を示すグラフ
である。FIG. 3 is a graph showing changes in nozzle original water pressure during insulator cleaning.
【図４】弁のサイズとそのＣv 値特性との関係を示すグ
ラフである。FIG. 4 is a graph showing the relationship between valve size and its C v value characteristic.
【図５】碍子洗浄時における碍子の電位分担を示すグラ
フである。FIG. 5 is a graph showing the potential distribution of insulators during insulator cleaning.
１ 碍子、２ ノズル、３ 貯水タンク、４ 碍子洗浄
用ポンプ、５ 洗浄区画弁、６ 制御系1 insulator, 2 nozzles, 3 water storage tank, 4 insulator cleaning pump, 5 cleaning partition valve, 6 control system
Claims (4)
低下させることにより、碍子表面における洗浄水到達点
の下降速度を碍子表面の洗浄水の流下速度よりも大きく
してストリーマの発生を防止することを特徴とする碍子
洗浄方法。1. The water pressure at the nozzle base is rapidly reduced at the end of insulator cleaning, so that the descending speed of the cleaning water reaching point on the insulator surface is made higher than the flowing speed of the cleaning water on the insulator surface to prevent the generation of streamers. An insulator cleaning method characterized by the above.
低下率を3kg/cm2/sec 以上とした請求項１に記載の碍子
洗浄方法。2. The method for cleaning an insulator according to claim 1, wherein the rate of decrease in water pressure at the nozzle base at the end of cleaning the insulator is 3 kg / cm 2 / sec or more.
られた洗浄区画弁に、その閉弁速度を変換する制御系を
接続したことを特徴とする碍子洗浄装置。3. An insulator cleaning apparatus, wherein a control system for converting a valve closing speed is connected to a cleaning partition valve provided between an insulator cleaning pump and a nozzle.
ータを碍子洗浄終了時に急速に回転させるための周波数
変換器を備えたものである請求項３に記載の碍子洗浄装
置。4. The insulator cleaning apparatus according to claim 3, wherein the control system is provided with a frequency converter for rapidly rotating the induction motor for driving the cleaning partition valve at the end of the insulator cleaning.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP02242795A JP3244988B2 (en) | 1995-02-10 | 1995-02-10 | Insulator cleaning method and insulator cleaning device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP02242795A JP3244988B2 (en) | 1995-02-10 | 1995-02-10 | Insulator cleaning method and insulator cleaning device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08222058A true JPH08222058A (en) | 1996-08-30 |
| JP3244988B2 JP3244988B2 (en) | 2002-01-07 |
Family
ID=12082402
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP02242795A Expired - Fee Related JP3244988B2 (en) | 1995-02-10 | 1995-02-10 | Insulator cleaning method and insulator cleaning device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3244988B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102773226A (en) * | 2012-07-27 | 2012-11-14 | 武汉大学 | Method and device for flushing 500kV post insulator with charged water |
| CN103121021A (en) * | 2013-03-07 | 2013-05-29 | 广东电网公司佛山供电局 | 500 KV double-post-insulator electrification water washing method |
-
1995
- 1995-02-10 JP JP02242795A patent/JP3244988B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102773226A (en) * | 2012-07-27 | 2012-11-14 | 武汉大学 | Method and device for flushing 500kV post insulator with charged water |
| CN103121021A (en) * | 2013-03-07 | 2013-05-29 | 广东电网公司佛山供电局 | 500 KV double-post-insulator electrification water washing method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3244988B2 (en) | 2002-01-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH08222058A (en) | Insulator washing method, and insulator washing device | |
| Watanabe | Flashover tests of insulators covered with ice or snow | |
| US3740862A (en) | Methods of treating elongated material | |
| CN202307285U (en) | High-voltage cable | |
| CN106893854A (en) | Annealing mechanism and enameled wire production system | |
| CN104506048A (en) | Plasma all-dimensional vacuum coated power supply and coating method thereof | |
| CN105463162B (en) | A kind of electro-hydraulic intensifying device of hardware internal surface of hole and its intensifying method | |
| CN210182135U (en) | High-voltage cable heating pipeline and high-voltage cable production line | |
| US1838917A (en) | Double-field dehydrator | |
| JP2504588B2 (en) | Insulator cleaning method and device | |
| CN109995206B (en) | Technical equipment and method for sealing and curing liquid filling material of motor armature after impregnation | |
| KR20030027040A (en) | Capacitance controlling process | |
| CN112614622B (en) | Cable production device for improving cable safety performance | |
| CN204857320U (en) | Coaxial cable copper line binary channels tin -plating apparatus for producing | |
| Kobayashi et al. | Experimental investigation on arc phenomena in SF6 puffer circuit breakers | |
| CN220545180U (en) | Air tap structure and static eliminator | |
| CN217474464U (en) | Aluminum wire thinning and conducting device | |
| US2387191A (en) | Apparatus for insulating electrical conductors | |
| CN217239134U (en) | Bushing type segmentation insulating copper pipe generating line | |
| CN214467890U (en) | Oil field gathering and transportation oil drainage equipment | |
| CN220872603U (en) | Three-in-one device for cable voltage-resistant dielectric loss partial discharge | |
| JPH07118235B2 (en) | Explosion-proof insulator tube for gas-filled insulation equipment | |
| JPH10255571A (en) | Method and device for washing insulator with small amount of water and nozzle used for the method | |
| JPH06223659A (en) | Insulator washing device | |
| US1997200A (en) | Alloy covered cable manufacture |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20011016 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20071026 Year of fee payment: 6 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20081026 Year of fee payment: 7 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20081026 Year of fee payment: 7 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20091026 Year of fee payment: 8 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20101026 Year of fee payment: 9 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20101026 Year of fee payment: 9 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20111026 Year of fee payment: 10 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20121026 Year of fee payment: 11 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20121026 Year of fee payment: 11 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20131026 Year of fee payment: 12 |
|
| LAPS | Cancellation because of no payment of annual fees |