EP0355545B1 - Steam turbine plant with regulated bleeding - Google Patents

Steam turbine plant with regulated bleeding Download PDF

Info

Publication number
EP0355545B1
EP0355545B1 EP89114527A EP89114527A EP0355545B1 EP 0355545 B1 EP0355545 B1 EP 0355545B1 EP 89114527 A EP89114527 A EP 89114527A EP 89114527 A EP89114527 A EP 89114527A EP 0355545 B1 EP0355545 B1 EP 0355545B1
Authority
EP
European Patent Office
Prior art keywords
steam turbine
pressure
bleed
disposed
bleeding
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
Application number
EP89114527A
Other languages
German (de)
French (fr)
Other versions
EP0355545A1 (en
Inventor
Jean Poulain
Jacques Desdouits
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Alstom Holdings SA
Original Assignee
GEC Alsthom SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=9369341&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0355545(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by GEC Alsthom SA filed Critical GEC Alsthom SA
Publication of EP0355545A1 publication Critical patent/EP0355545A1/en
Application granted granted Critical
Publication of EP0355545B1 publication Critical patent/EP0355545B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K7/00—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating
    • F01K7/34—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being of extraction or non-condensing type; Use of steam for feed-water heating
    • F01K7/345—Control or safety-means particular thereto
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D17/00—Regulating or controlling by varying flow
    • F01D17/02—Arrangement of sensing elements
    • F01D17/08—Arrangement of sensing elements responsive to condition of working-fluid, e.g. pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D17/00—Regulating or controlling by varying flow
    • F01D17/10—Final actuators
    • F01D17/105—Final actuators by passing part of the fluid

Definitions

  • the present invention relates to a steam turbine installation with withdrawal adjusted to a determined pressure.
  • This arrangement is bulky and lengthens the turbine by a length corresponding to at least three stages, as can be seen in FIG. 1.
  • the present invention thus relates to a steam turbine installation with withdrawal adjusted to a determined pressure, driving a receiving member, comprising a withdrawal outlet disposed between two successive stages, characterized in that the withdrawal pressure P is adjusted, in a certain range D of the draw-off flow, by means of a servo-valve arranged on the exhaust pipe and controlled from a control circuit comprising a means for measuring the pressure of the draw-off flow.
  • the turbine is composed of two separate bodies, said draw-off outlet being arranged between two successive stages of the first body and said servo-valve being disposed on the exhaust pipe of said first body.
  • the installation shown comprises a steam turbine 1 mounted between two bearings 2 and 3.
  • the turbine drives an alternator 4 via a reduction gear 5.
  • a pipe 6 provided with a valve 7 supplies the turbine, the exhaust of which is connected to a condenser 8 by a pipe 9.
  • the turbine comprises seven stages, and a withdrawal pipe 10 terminates within the turbine between the fifth and the sixth stage.
  • the exhaust pipe 9 is provided with a servo-valve 11.
  • This servo-valve 11 is controlled from a control circuit 12 comprising means for comparing a setpoint signal coming from a setpoint generator 13 and a signal coming from a pressure probe 14 located in the draw-off line 10.
  • the invention makes it possible to separate in space the functions of racking and adjusting the racking pressure thereby reducing the length of the rotary mobile.
  • FIG. 3 shows a particularly interesting example of the invention, which is the case of a multi-body cantilever turbine.
  • the installation shown comprises a steam turbine made up of two bodies 20 and 21 mounted cantilevered.
  • the high pressure body 20 is connected to the low pressure body 21 by its exhaust pipe 22.
  • the two bodies 21 and 22 drive in parallel a reduction gear 23 whose output shaft drives a receiver 24, for example an alternator.
  • the low pressure body 21 escapes in a condenser 25.
  • the high pressure body 20 is supplied by a pipe inlet 26, provided with an inlet valve 33, from a boiler.
  • a withdrawal line 27 terminates within the high pressure body 2 between two expansion stages, between the third and the fourth stage in the example shown. This withdrawal is adjusted to a determined pressure P.
  • the exhaust pipe 22 of the first body 20 is provided with a servo-valve 28.
  • the servo-valve 28 is controlled from a servo circuit 29 comprising means for comparing a setpoint signal coming from a setpoint generator 30 and a signal coming from a pressure probe 31 located in the withdrawal line 27.
  • the installation shown also includes a second unregulated withdrawal 32 taken downstream of the first stage of the low pressure body 21.
  • the adjustment system 28 will generally be a system with several valves supplying separate injection sectors.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Control Of Turbines (AREA)

Description

La présente invention concerne une installation de turbine à vapeur avec soutirage réglé à une pression déterminée.The present invention relates to a steam turbine installation with withdrawal adjusted to a determined pressure.

Les industriels qui ont leur propre installation de production d'électricité, souhaitent également avoir de la vapeur à une pression déterminée, utilisée soit à des fins de chauffage, soit pour un processus industriel quelconque.Industrialists who have their own electricity production plant also wish to have steam at a determined pressure, used either for heating purposes or for any industrial process.

Sur les turbines classiques entre paliers possédant un nombre d'étages important sur un même arbre et dans un seul corps, le soutirage est réalisé conformément au schéma de la figure 1, voir aussi les documents GB-A-2061555 et US-A- 1 777 470. En prenant cette figure pour exemple, on peut voir que le soutirage s'effectue par une sortie S située entre le sixième étage P et le septième étage Q et que la soupape R de réglage permettant de maintenir constante la pression de soutirage, est située également entre le sixième et le septième étage.On conventional turbines between bearings with a large number of stages on the same shaft and in a single body, the racking is carried out in accordance with the diagram of Figure 1, see also documents GB-A-2061555 and US-A- 1 777 470. Taking this figure as an example, it can be seen that the withdrawal takes place via an outlet S situated between the sixth stage P and the seventh stage Q and that the regulating valve R making it possible to keep the withdrawal pressure constant, is also located between the sixth and seventh floors.

Cette disposition est encombrante et allonge la turbine d'une longueur correspondant au moins à trois étages, comme on peut le voir sur la figure 1.This arrangement is bulky and lengthens the turbine by a length corresponding to at least three stages, as can be seen in FIG. 1.

Par ailleurs, une telle disposition est très rarement possible sur les turbines multicorps en porte à faux.In addition, such an arrangement is very rarely possible on multi-body turbines with a cantilever.

La présente invention a ainsi pour objet une installation de turbine à vapeur avec soutirage réglé à une pression déterminée, entraînant un organe récepteur, comprenant une sortie de soutirage disposée entre deux étages successifs, caractérisée en ce que la pression P de soutirage est réglée, dans une certaine plage D du débit de soutirage, au moyen d'une servo-vanne disposée sur la conduite d'échappement et commandée à partir d'un circuit d'asservissement comprenant un moyen de mesure de la pression du débit de soutirage.The present invention thus relates to a steam turbine installation with withdrawal adjusted to a determined pressure, driving a receiving member, comprising a withdrawal outlet disposed between two successive stages, characterized in that the withdrawal pressure P is adjusted, in a certain range D of the draw-off flow, by means of a servo-valve arranged on the exhaust pipe and controlled from a control circuit comprising a means for measuring the pressure of the draw-off flow.

Selon une réalisation particulière, la turbine est composée de deux corps distincts, ladite sortie de soutirage étant disposée entre deux étages successifs du premier corps et ladite servo-vanne étant disposée sur la conduite d'échappement dudit premier corps.According to a particular embodiment, the turbine is composed of two separate bodies, said draw-off outlet being arranged between two successive stages of the first body and said servo-valve being disposed on the exhaust pipe of said first body.

On va maintenant donner la description de deux exemples particuliers de mise en oeuvre de l'invention en se référant au dessin annexé dans lequel :

  • La figure 1 représente une installation de turbine à vapeur classique entre paliers entraînant un alternateur, avec un soutirage à pression réglée, selon une disposition habituelle.
  • La figure 2 représente schématiquement une installation de turbine à vapeur entre paliers selon la disposition de l'invention.
  • La figure 3 représente schématiquement un exemple préféré d'une installation de turbine à vapeur selon l'invention comprenant deux corps montés en porte à faux.
We will now give the description of two particular examples of implementation of the invention with reference to the appended drawing in which:
  • Figure 1 shows a steam turbine installation classic between bearings driving an alternator, with a racking at regulated pressure, according to a usual arrangement.
  • FIG. 2 schematically represents a steam turbine installation between bearings according to the arrangement of the invention.
  • FIG. 3 schematically represents a preferred example of a steam turbine installation according to the invention comprising two bodies mounted in cantilever.

En se référant à la figure 2, l'installation représentée comprend une turbine à vapeur 1 montée entre deux paliers 2 et 3. La turbine entraîne un alternateur 4 par l'intermédiaire d'un réducteur 5. Une conduite 6 munie d'une vanne d'admission 7 alimente la turbine dont l'échappement est relié à un condenseur 8 par une conduite 9.Referring to FIG. 2, the installation shown comprises a steam turbine 1 mounted between two bearings 2 and 3. The turbine drives an alternator 4 via a reduction gear 5. A pipe 6 provided with a valve 7 supplies the turbine, the exhaust of which is connected to a condenser 8 by a pipe 9.

Sur la figure représentée, la turbine comprend sept étages, et une conduite de soutirage 10 aboutit au sein de la turbine entre le cinquième et le sixième étage.In the figure shown, the turbine comprises seven stages, and a withdrawal pipe 10 terminates within the turbine between the fifth and the sixth stage.

Le soutirage est réglé à une pression déterminée P. Pour effectuer ce réglage, sur une certaine plage D du débit soutiré, la conduite d'échappement 9 est munie d'une servo-vanne 11. Cette servo-vanne 11 est commandée à partir d'un circuit d'asservissement 12 comportant des moyens de comparaison d'un signal de consigne provenant d'un générateur de consigne 13 et d'un signal en provenance d'une sonde de pression 14 située dans la conduite de soutirage 10.The withdrawal is adjusted to a determined pressure P. To make this adjustment, over a certain range D of the withdrawn flow, the exhaust pipe 9 is provided with a servo-valve 11. This servo-valve 11 is controlled from a control circuit 12 comprising means for comparing a setpoint signal coming from a setpoint generator 13 and a signal coming from a pressure probe 14 located in the draw-off line 10.

Comme on le voit, l'invention permet de séparer dans l'espace les fonctions de soutirage et de réglage de la pression de soutirage réduisant ainsi la longueur du mobile tournant.As can be seen, the invention makes it possible to separate in space the functions of racking and adjusting the racking pressure thereby reducing the length of the rotary mobile.

La figure 3 montre un exemple particulièrement intéressant de l'invention qui est le cas d'une turbine multicorps en porte à faux. Sur cette figure 3, l'installation représentée comprend une turbine à vapeur composée de deux corps 20 et 21 montés en porte à faux. Le corps haute pression 20 est relié au corps basse pression 21 par sa conduite d'échappement 22. Les deux corps 21 et 22 attaquent parallèlement en entrée un réducteur 23 dont l'arbre de sortie entraîne un récepteur 24, par exemple un alternateur. Le corps basse pression 21 échappe dans un condenseur 25.FIG. 3 shows a particularly interesting example of the invention, which is the case of a multi-body cantilever turbine. In this FIG. 3, the installation shown comprises a steam turbine made up of two bodies 20 and 21 mounted cantilevered. The high pressure body 20 is connected to the low pressure body 21 by its exhaust pipe 22. The two bodies 21 and 22 drive in parallel a reduction gear 23 whose output shaft drives a receiver 24, for example an alternator. The low pressure body 21 escapes in a condenser 25.

Le corps haute pression 20 est alimenté par une conduite d'admission 26, munie d'une vanne d'admission 33, en provenance d'une chaudière. Une conduite de soutirage 27 aboutit au sein du corps haute pression 2 entre deux étages de détente, entre le troisième et le quatrième étage dans l'exemple représenté. Ce soutirage est réglé à une pression déterminée P.The high pressure body 20 is supplied by a pipe inlet 26, provided with an inlet valve 33, from a boiler. A withdrawal line 27 terminates within the high pressure body 2 between two expansion stages, between the third and the fourth stage in the example shown. This withdrawal is adjusted to a determined pressure P.

Pour effectuer ce réglage, sur une certaine plage D du débit soutiré, la conduite d'échappement 22 du premier corps 20 est munie d'une servo-vanne 28. La servo-vanne 28 est commandée à partir d'un circuit d'asservissement 29 comportant des moyens de comparaison d'un signal de consigne provenant d'un générateur de consigne 30 et d'un signal en provenance d'une sonde de pression 31 située dans la conduite de soutirage 27.To make this adjustment, over a certain range D of the withdrawn flow, the exhaust pipe 22 of the first body 20 is provided with a servo-valve 28. The servo-valve 28 is controlled from a servo circuit 29 comprising means for comparing a setpoint signal coming from a setpoint generator 30 and a signal coming from a pressure probe 31 located in the withdrawal line 27.

L'installation représentée comporte également un deuxième soutirage 32, non réglé, pris en aval du premier étage du corps basse pression 21.The installation shown also includes a second unregulated withdrawal 32 taken downstream of the first stage of the low pressure body 21.

Le système de réglage 28 sera généralement un système à plusieurs soupapes alimentant des secteurs d'injection séparés.The adjustment system 28 will generally be a system with several valves supplying separate injection sectors.

Claims (3)

1. A steam turbine installation with bleeding adjusted to a predetermined pressure P, said installation driving a load and including a bleed outlet disposed between two successive stages, characterized in that the bleed pressure P is adjusted over a certain range D of bleed rates by means of a servo valve disposed on the turbine exhaust duct and controlled by a servo-control loop including means for measuring the pressure of the bleed flow.
2. A steam turbine installation according to claim 1, characterized in that the turbine installation is composed of two distinct units, said bleed outlet being disposed between two successive stages of the first unit and said servo valve being disposed on the exhaust duct from said first unit.
3. A steam turbine installation according to claim 2, characterized in that said two units are cantilever mounted.
EP89114527A 1988-08-16 1989-08-07 Steam turbine plant with regulated bleeding Expired - Lifetime EP0355545B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8810921A FR2635561B1 (en) 1988-08-16 1988-08-16 STEAM TURBINE INSTALLATION WITH ADJUSTED FILLING
FR8810921 1988-08-16

Publications (2)

Publication Number Publication Date
EP0355545A1 EP0355545A1 (en) 1990-02-28
EP0355545B1 true EP0355545B1 (en) 1992-07-22

Family

ID=9369341

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89114527A Expired - Lifetime EP0355545B1 (en) 1988-08-16 1989-08-07 Steam turbine plant with regulated bleeding

Country Status (6)

Country Link
US (1) US4953355A (en)
EP (1) EP0355545B1 (en)
JP (1) JPH0281906A (en)
DE (1) DE68902198T2 (en)
ES (1) ES2034532T3 (en)
FR (1) FR2635561B1 (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4088313B2 (en) 2004-01-23 2008-05-21 オリンパス株式会社 Image processing system, hospital processing system
PL1632650T3 (en) * 2004-09-01 2013-10-31 Siemens Ag Steam turbine
US8186935B2 (en) * 2009-01-12 2012-05-29 General Electric Company Steam turbine having exhaust enthalpic condition control and related method
CN102278148A (en) * 2010-06-12 2011-12-14 中国电力工程顾问集团华东电力设计院 Full-period steam inlet steam turbine generator unit and primary frequency adjusting method thereof
PL2434103T3 (en) * 2010-09-24 2015-05-29 Siemens Ag High speed turbine arrangement
DE102012205159A1 (en) * 2012-03-29 2013-10-02 Siemens Aktiengesellschaft Turbine system with three connected to a central transmission turbines, turbine plant and method for operating a work machine
DE102012018468B4 (en) * 2012-09-19 2022-07-14 Man Energy Solutions Se geared turbomachine
ITFI20120193A1 (en) * 2012-10-01 2014-04-02 Nuovo Pignone Srl "AN ORGANIC RANKINE CYCLE FOR MECHANICAL DRIVE APPLICATIONS"
DE102013001454A1 (en) * 2013-01-29 2014-07-31 Man Diesel & Turbo Se Steam turbine for driving electrical generator to convert mechanical energy into electrical energy during expansion of steam, has controller controlling tapping pressure over control valve if tapping pressure is smaller than threshold value
US20170323240A1 (en) 2016-05-06 2017-11-09 General Electric Company Computing system to control the use of physical state attainment with inspection
WO2024044762A1 (en) * 2022-08-26 2024-02-29 The Regents Of The University Of California Dynamic counterbalance to perform chronic free-behaving research with small animals

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1777470A (en) * 1929-04-10 1930-10-07 Westinghouse Electric & Mfg Co Multistage-bleeder-turbine control
US3724214A (en) * 1971-03-05 1973-04-03 Westinghouse Electric Corp Extraction control system for a turbogenerator set
US4087797A (en) * 1976-07-19 1978-05-02 Westinghouse Electric Corp. System for detecting water in steam pipes
DE2812820C2 (en) * 1978-01-31 1986-04-03 BBC Aktiengesellschaft Brown, Boveri & Cie., Baden, Aargau Control device for a steam turbine
US4270357A (en) * 1979-10-10 1981-06-02 General Electric Company Turbine control
JPS5946303A (en) * 1982-09-10 1984-03-15 Toshiba Corp Turbine control device
JPS59168203A (en) * 1983-03-14 1984-09-21 Mitsubishi Heavy Ind Ltd Back-pressure turbine having back-pressure controlling means
JPS61205309A (en) * 1985-03-08 1986-09-11 Hitachi Ltd Protective operating method and its device of feed water heater

Also Published As

Publication number Publication date
FR2635561B1 (en) 1990-10-12
FR2635561A1 (en) 1990-02-23
ES2034532T3 (en) 1993-04-01
US4953355A (en) 1990-09-04
DE68902198T2 (en) 1993-01-21
EP0355545A1 (en) 1990-02-28
JPH0281906A (en) 1990-03-22
DE68902198D1 (en) 1992-08-27

Similar Documents

Publication Publication Date Title
EP0355545B1 (en) Steam turbine plant with regulated bleeding
BE1026919B1 (en) AIR-OIL HEAT EXCHANGER
EP0288356B1 (en) Method for real-time adjustment of the radial clearance between rotor and stator of a turbo machine
US5961279A (en) Turbine power plant having minimal-contact brush seal augmented labyrinth seal
CA2513783C (en) Turbo engine inlet bullet fairing
US20080298955A1 (en) Inlet guide vane inner air seal surge retaining mechanism
FR2907495A1 (en) TURBOMACHINE
WO2019162601A1 (en) Turbine engine comprising a heat exchanger in the secondary path
EP3693609A1 (en) Measurement of total pressure and total temperature in a turbine engine
FR2462564A1 (en) INSTALLATION FOR CONTROLLING ADJUSTABLE PUSH TUTERS OF DOUBLE FLOW TURBOREACTORS
GB2104966A (en) Closed loop control for tip clearance of a gas turbine engine
FR3093766A1 (en) AIR CONDITIONING SYSTEM EQUIPPED WITH A THERMAL OIL AND PRESSURIZED AIR MANAGEMENT SYSTEM
JPH08177509A (en) Variable displacement turbine of exhaust turbocharger
FR2722836A1 (en) Turbo engine with adjustment for radial play
EP0378943A1 (en) Compressor housing with an adaptable inner diameter for a turbo machine
JPH0559901A (en) Balance piston for turbine
JP2807234B2 (en) Combustion engine equipment
EP0337852B1 (en) Thermaly regulated exhaust channel for a turbo machine
JPH05156902A (en) Thrust adjusting device for turbine and its method
JPH02502301A (en) Turbine with hydraulic regulator
FR3069632B1 (en) DEVICE FOR MEASURING THE AXIAL OR RADIAL EXPANSION OF A TUBULAR ORGAN OF TURBOMACHINE
FR2685734A1 (en) HYDRAULIC FLUID SUPPLY TO THE REGULATION DEVICE OF AN AIRCRAFT ENGINE.
EP0337830B1 (en) Device for equalizing fluid flow of an aircraft air-conditioning installation
Klassen Effect of inducer inlet and diffuser throat areas on performance of a low pressure ratio sweptback centrifugal compressor
US887361A (en) Elastic-fluid turbine.

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): BE CH DE ES FR GB IT LI NL SE

17P Request for examination filed

Effective date: 19900827

17Q First examination report despatched

Effective date: 19911105

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): BE CH DE ES FR GB IT LI NL SE

REF Corresponds to:

Ref document number: 68902198

Country of ref document: DE

Date of ref document: 19920827

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
ITF It: translation for a ep patent filed
PLBI Opposition filed

Free format text: ORIGINAL CODE: 0009260

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2034532

Country of ref document: ES

Kind code of ref document: T3

26 Opposition filed

Opponent name: ASEA BROWN BOVERI ABB MANAGEMENT AG, BADEN TEI/IMM

Effective date: 19930226

PLBI Opposition filed

Free format text: ORIGINAL CODE: 0009260

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 19930518

Year of fee payment: 5

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19930519

Year of fee payment: 5

Ref country code: CH

Payment date: 19930519

Year of fee payment: 5

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19930521

Year of fee payment: 5

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19930526

Year of fee payment: 5

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19930527

Year of fee payment: 5

26 Opposition filed

Opponent name: SIEMENS AG GRPA3 ERL S

Effective date: 19930420

Opponent name: ASEA BROWN BOVERI ABB MANAGEMENT AG, BADEN TEI/IMM

Effective date: 19930226

NLR1 Nl: opposition has been filed with the epo

Opponent name: ASEA BROWN BOVERI ABB MANAGEMENT AG.

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 19930616

Year of fee payment: 5

NLR1 Nl: opposition has been filed with the epo

Opponent name: SIEMENS AG.

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19930831

Year of fee payment: 5

RDAG Patent revoked

Free format text: ORIGINAL CODE: 0009271

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: PATENT REVOKED

27W Patent revoked

Effective date: 19930826

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

GBPR Gb: patent revoked under art. 102 of the ep convention designating the uk as contracting state

Free format text: 930826

NLR2 Nl: decision of opposition
EUG Se: european patent has lapsed

Ref document number: 89114527.8

Effective date: 19931229

PLAB Opposition data, opponent's data or that of the opponent's representative modified

Free format text: ORIGINAL CODE: 0009299OPPO