EP0859395A2 - Low voltage circuit breaker with optionally mounted measuring transducer - Google Patents

Low voltage circuit breaker with optionally mounted measuring transducer Download PDF

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Publication number
EP0859395A2
EP0859395A2 EP98250046A EP98250046A EP0859395A2 EP 0859395 A2 EP0859395 A2 EP 0859395A2 EP 98250046 A EP98250046 A EP 98250046A EP 98250046 A EP98250046 A EP 98250046A EP 0859395 A2 EP0859395 A2 EP 0859395A2
Authority
EP
European Patent Office
Prior art keywords
circuit breaker
current transformer
voltage circuit
converter
purposes
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.)
Withdrawn
Application number
EP98250046A
Other languages
German (de)
French (fr)
Other versions
EP0859395A3 (en
Inventor
Ulrich Baumgärtl
Henry Franke
Wolfgang Röhl
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.)
Siemens AG
Original Assignee
Siemens AG
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
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP0859395A2 publication Critical patent/EP0859395A2/en
Publication of EP0859395A3 publication Critical patent/EP0859395A3/en
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/02—Housings; Casings; Bases; Mountings
    • H01H71/0207—Mounting or assembling the different parts of the circuit breaker
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/20—Instruments transformers
    • H01F38/22—Instruments transformers for single phase ac
    • H01F38/28—Current transformers
    • H01F38/30—Constructions
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H83/00—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
    • H01H83/14—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by imbalance of two or more currents or voltages, e.g. for differential protection
    • H01H83/144—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by imbalance of two or more currents or voltages, e.g. for differential protection with differential transformer
    • H01H2083/148—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by imbalance of two or more currents or voltages, e.g. for differential protection with differential transformer with primary windings formed of rigid copper conductors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H83/00—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
    • H01H83/20—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by excess current as well as by some other abnormal electrical condition

Definitions

  • the invention relates to low-voltage circuit breakers arranged in the usual way on the lower connecting rails Iron converters for release purposes, optionally with a second converter for measuring functions can be equipped.
  • Low-voltage circuit breakers are currently in the basic version with an iron converter with one for trip purposes sufficient accuracy, which is usually based on the lower connecting bar is arranged. It means that for a desired measuring function outside the circuit breaker separate transducers mounted on the busbar Need to become. It is also known in addition to the trigger function a measuring function using a combination converter to provide, such that an iron converter and a Rogowski converter can be arranged. It means that a Rogowski converter is generally required, even if no measuring function is required or that during manufacture already between switches with measuring function and those without Measurement function must be differentiated. But that means one significantly increased technological effort in Manufacturing area.
  • the invention is therefore based on the problem of low-voltage circuit breakers to create the optional only with transducers for a trigger function or additionally with Transducers can be equipped for a measuring function without for this an additional manufacturing effort at the switch is required or the transducer outside the switch in the switchgear, e.g. mounted on the busbar must become.
  • the low-voltage circuit breaker according to the invention contains only an iron converter in its basic version sufficient accuracy for triggering purposes. This is expediently in the usual way on the lower connecting rail arranged. If one measuring function is desired, a second one is used Converter, advantageously a Rogowski converter, with associated Evaluation electronics retrofitted, and also in Circuit breaker arranged.
  • this second converter is on the same Connection rail of the circuit breaker arranged as the Tripping converter, the one previously provided for this Assembly room is designed accordingly enlarged.
  • the second transducer as a transducer can also be useful on the other, usually upper, connecting rail be arranged, here a corresponding assembly room is provided.
  • the one that is preferably designed as a Rogowski converter Transducer is with the associated evaluation electronics executed and required as an independent unit no calibration when installed in the circuit breaker.
  • FIG. 1 shows schematically a low-voltage circuit breaker with the solution according to the invention of installing both Transducer on a connecting rail in section.
  • FIG. 2 shows schematically a low-voltage circuit breaker with the inventive solution of installing the Transducer on different connecting rails in average.
  • the low-voltage circuit breaker shown schematically in FIG. 1 1 contains one in its basic version Iron converter 2 with one sufficient for triggering purposes Accuracy. This is in the usual way on the lower one Connection rail 3 arranged. Via the electrical signal lines 4 is the iron converter 2 for triggering purposes with the normal protection module 5 of the circuit breaker connected. Of the The mounting space 6 provided for this converter 2 is so large trained that if necessary, another converter for a measuring function can be installed. Is that need given, a Rogowski converter 7 is on the same Connection rail 3 of the circuit breaker, such as the iron transformer 2 arranged for triggering purposes. This is for this intended mounting space 6, as mentioned, accordingly enlarged. The Rogowski converter 7 is via signal lines 8 connected to associated evaluation electronics 9.
  • FIG. 2 shows a switch according to the invention, where the Rogowski converter 7 on the upper connecting rail 10 of the circuit breaker is arranged, for which purpose a corresponding Assembly room 11 on the upper connecting rail is provided.
  • the converter 7 is by means of signal lines 8 connected to the associated evaluation electronics 9. Also at This type of installation is the Rogowski converter on the input rail when the switch for maintenance and Repair work without tension.
  • the advantages of the invention are that only one basic switch for the installation of only one converter, as well what is needed for the installation of two transducers manufacturing technology simplifications. It can be decided at any time whether a converter is required for a measuring function and this can then be retrofitted without any problems.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Patch Boards (AREA)
  • Breakers (AREA)

Abstract

A low-voltage (LV) circuit-breaker including a current transformer (2) arranged on a connection bus for tripping or release purposes. A second current transformer (7) is installed in the circuit- breaker for measurement purposes. More specifically, both transformers (2,7) are arranged on the same first connection bus (3), in which the assembly or installation space (6) of the trip or release current transformer (2) is enlarged, or the second current transformer (7) is arranged on a second connection bus (10) suitable assembly space is provided.

Description

Die Erfindung betrifft Niederspannungs-Leistungsschalter mit in üblicher Weise auf den unteren Anschlußschienen angeordneten Eisenwandlern für Auslösezwecke, die wahlweise mit einem zweiten Wandler für Meßfunktionen ausrüstbar sind.The invention relates to low-voltage circuit breakers arranged in the usual way on the lower connecting rails Iron converters for release purposes, optionally with a second converter for measuring functions can be equipped.

Niederspannungs-Leistungsschalter sind bisher in der Grundausführung mit einem Eisenwandler mit einer für Auslösezwecke ausreichenden Genauigkeit ausgestattet, der üblicherweise auf der unteren Anschlußschiene angeordnet ist. Das bedeutet, daß für eine gewünschte Meßfunktion außerhalb des Leistungsschalters separate Meßwandler auf der Sammelschiene montiert werden müssen. Es ist auch bekannt, zusätzlich zur Auslösefunktion eine Meßfunktion mittels eines Kombinationswandlers vorzusehen, derart, daß in einem Gehäuse ein Eisenwandler und ein Rogowskiwandler angeordnet werden. Das bedeutet, daß generell ein Rogowskiwandler erforderlich ist, auch wenn keine Meßfunktion erforderlich ist oder daß bei der Fertigung bereits zwischen Schaltern mit Meßfunktion und solchen ohne Meßfunktion unterschieden werden muß. Das bedeutet aber einen wesentlich erhöhten technologischen Aufwand im Fertigungsbereich.Low-voltage circuit breakers are currently in the basic version with an iron converter with one for trip purposes sufficient accuracy, which is usually based on the lower connecting bar is arranged. It means that for a desired measuring function outside the circuit breaker separate transducers mounted on the busbar Need to become. It is also known in addition to the trigger function a measuring function using a combination converter to provide, such that an iron converter and a Rogowski converter can be arranged. It means that a Rogowski converter is generally required, even if no measuring function is required or that during manufacture already between switches with measuring function and those without Measurement function must be differentiated. But that means one significantly increased technological effort in Manufacturing area.

Der Erfindung liegt somit das Problem zugrunde, Niederspannungs-Leistungsschalter zu schaffen, die wahlweise nur mit Wandlern für eine Auslösefunktion oder zusätzlich mit Wandlern für eine Meßfunktion ausrüstbar sind, ohne daß hierfür ein zusätzlicher Fertigungsaufwand am Schalter erforderlich ist oder der Meßwandler außerhalb des Schalters in der Schaltanlage, z.B. auf der Sammelschiene, montiert werden muß.The invention is therefore based on the problem of low-voltage circuit breakers to create the optional only with transducers for a trigger function or additionally with Transducers can be equipped for a measuring function without for this an additional manufacturing effort at the switch is required or the transducer outside the switch in the switchgear, e.g. mounted on the busbar must become.

Diese Aufgabe wird erfindungsgemäß durch die im Kennzeichen des Anspruchs 1 angegebenen Merkmale gelöst.This object is achieved by the in the license plate of the specified features solved.

Vorteilhafte Weiterbildungen der Erfindung sind in den Unteransprüchen angegeben.Advantageous developments of the invention are in the Subclaims specified.

Der erfindungsgemäße Niederspannungs-Leistungsschalter enthält in seiner Grundausführung nur einen Eisenwandler mit einer für Auslösezwecke ausreichenden Genauigkeit. Dieser ist zweckmäßig in üblicher Weise auf der unteren Anschlußschiene angeordnet. Wird eine Meßfunktion gewünscht, wird ein zweiter Wandler, vorteilhaft ein Rogowskiwandler, mit zugehöriger Auswerteelektronik nachgerüstet, und zusätzlich im Leistungsschalter angeordnet.The low-voltage circuit breaker according to the invention contains only an iron converter in its basic version sufficient accuracy for triggering purposes. This is expediently in the usual way on the lower connecting rail arranged. If one measuring function is desired, a second one is used Converter, advantageously a Rogowski converter, with associated Evaluation electronics retrofitted, and also in Circuit breaker arranged.

Vorzugsweise wird dieser zweite Wandler auf der gleichen Anschlußschiene des Leistungsschalters angeordnet, wie der Auslösewandler, wobei der für diesen bisher vorgesehene Montageraum entsprechend vergrößert ausgebildet ist. Der zweite Wandler als Meßwandler kann zweckmäßig auch auf der anderen, üblicherweise dann oberen, Anschlußschiene angeordnet werden, wobei hier ein entsprechender Montageraum vorgesehen ist. Der vorzugsweise als Rogowskiwandler ausgeführte Meßwandler ist mit der zugehörigen Auswerteelektronik als eigenständige Baueinheit ausgeführt und bedarf beim Einbau in den Leistungsschalter keiner Kalibrierung. Preferably this second converter is on the same Connection rail of the circuit breaker arranged as the Tripping converter, the one previously provided for this Assembly room is designed accordingly enlarged. Of the second transducer as a transducer can also be useful on the other, usually upper, connecting rail be arranged, here a corresponding assembly room is provided. The one that is preferably designed as a Rogowski converter Transducer is with the associated evaluation electronics executed and required as an independent unit no calibration when installed in the circuit breaker.

Die Erfindung wird im folgenden anhand eines in den Figuren dargestellten bevorzugten Ausführungsbeispiels näher erläutert.The invention is described below with reference to one in the figures illustrated preferred embodiment closer explained.

Die Fig.1 zeigt schematisch einen Niederspannungs-Leistungsschalter mit der erfindungsgemäßen Lösung des Einbaus beider Wandler auf einer Anschlußschiene im Schnitt.1 shows schematically a low-voltage circuit breaker with the solution according to the invention of installing both Transducer on a connecting rail in section.

Die Fig.2 zeigt schematisch einen Niederspannungs-Leistungsschalter mit der erfindungsgemäßen Lösung des Einbaus der Wandler auf verschiedenen Anschlußschienen im Schnitt.2 shows schematically a low-voltage circuit breaker with the inventive solution of installing the Transducer on different connecting rails in average.

Der in der Fig. 1 schematisch dargestellte Niederspannungs-Leistungsschalter 1 enthält in seiner Grundausführung einen Eisenwandler 2 mit einer für Auslösezwecke ausreichenden Genauigkeit. Dieser ist in üblicher Weise auf der unteren Anschlußschiene 3 angeordnet. Über die elektrischen Signalleitungen 4 ist der Eisenwandler 2 für Auslösezwecke mit dem normalen Schutzmodul 5 des Leistungsschalters verbunden. Der für diesen Wandler 2 vorgesehene Montageraum 6 ist so groß ausgebildet, daß im Bedarfsfalle ein weiterer Wandler für eine Meßfunktion eingebaut werden kann. Ist dieser Bedarf gegeben, wird ein Rogowskiwandler 7 auf der gleichen Anschlußschiene 3 des Leistungsschalters, wie der Eisenwandler 2 für Auslösezwecke, angeordnet. Dazu ist der für diesen vorgesehene Montageraum 6, wie erwähnt, entsprechend vergrößert. Über Signalleitungen 8 ist der Rogowskiwandler 7 mit zugehöriger Auswerteelektronik 9 verbunden. The low-voltage circuit breaker shown schematically in FIG. 1 1 contains one in its basic version Iron converter 2 with one sufficient for triggering purposes Accuracy. This is in the usual way on the lower one Connection rail 3 arranged. Via the electrical signal lines 4 is the iron converter 2 for triggering purposes with the normal protection module 5 of the circuit breaker connected. Of the The mounting space 6 provided for this converter 2 is so large trained that if necessary, another converter for a measuring function can be installed. Is that need given, a Rogowski converter 7 is on the same Connection rail 3 of the circuit breaker, such as the iron transformer 2 arranged for triggering purposes. This is for this intended mounting space 6, as mentioned, accordingly enlarged. The Rogowski converter 7 is via signal lines 8 connected to associated evaluation electronics 9.

In der Fig. 2 ist ein erfindungsgemäßer Schalter dargestellt, bei dem der Rogowskiwandler 7 auf der oberen Anschlußschiene 10 des Leistungsschalters angeordnet ist, wozu ein entsprechender Montageraum 11 an der oberen Anschlußschiene vorgesehen ist. Der Wandler 7 ist mittels Signalleitungen 8 mit der zugehörigen Auswerteelektronik 9 verbunden. Auch bei dieser Einbauweise ist der Rogowskiwandler an der Eingangsschiene bei ausgefahrenem Schalter für Wartungs- und Reparaturarbeiten spannungsfrei.2 shows a switch according to the invention, where the Rogowski converter 7 on the upper connecting rail 10 of the circuit breaker is arranged, for which purpose a corresponding Assembly room 11 on the upper connecting rail is provided. The converter 7 is by means of signal lines 8 connected to the associated evaluation electronics 9. Also at This type of installation is the Rogowski converter on the input rail when the switch for maintenance and Repair work without tension.

Die Vorteile der Erfindung bestehen darin, daß nur ein Grundschalter sowohl für den Einbau nur eines Wandlers, als auch für den Einbau von zwei Wandlern benötigt wird, was fertigungstechnologische Vereinfachungen mit sich bringt. Dabei kann zu jedem beliebigen Zeitpunkt entschieden werden, ob ein Wandler für eine Meßfunktion benötigt wird und dieser kann dann ohne Probleme nachgerüstet werden.The advantages of the invention are that only one basic switch for the installation of only one converter, as well what is needed for the installation of two transducers manufacturing technology simplifications. It can be decided at any time whether a converter is required for a measuring function and this can then be retrofitted without any problems.

Durch den Einbau des Meßwandlers im Schalter ist dieser, im Gegensatz zum Einbau auf der Sammelschiene, bei ausgefahrenem Schalter zu Reparatur- und Wartungsarbeiten spannungsfrei, so daß zu diesem Zweck sonst erforderliche Abschaltungen anderer Anlagenteile nicht erforderlich sind.By installing the transducer in the switch, this is in the Contrary to the installation on the busbar, when extended Switches for repair and maintenance work free of voltage, see above that other shutdowns otherwise required for this purpose Plant parts are not required.

Claims (4)

Niederspannungs-Leistungsschalter mit auf einer Anschlußschiene angeordnetem Stromwandler für Auslösezwecke, dadurch gekennzeichnet, daß ein zweiter Stromwandler (7) für Meßzwecke im Leistungsschalter montierbar ist.Low-voltage circuit breaker with a current transformer for tripping purposes arranged on a connecting rail, characterized in that a second current transformer (7) can be mounted in the circuit breaker for measuring purposes. Niederspannungs-Leistungsschalter nach Anspruch 1, dadurch gekennzeichnet, daß der Stromwandler (7) für Meßzwecke auf derselben, ersten Anschlußschiene (3) des Leistungsschalters (1) angeordnet ist, wie der Stromwandler (2) für Auslösezwecke, wobei der Montageraum (6) des Stromwandlers (2) für Auslösezwecke in geeigneter Form vergrößert ist.Low-voltage circuit breaker according to Claim 1, characterized in that the current transformer (7) for measuring purposes is arranged on the same first connecting rail (3) of the circuit breaker (1) as the current transformer (2) for tripping purposes, the mounting space (6) of the Current transformer (2) is enlarged in a suitable form for triggering purposes. Niederspannungs-Leistungsschalter nach Anspruch 1, dadurch gekennzeichnet, daß der Stromwandler (7) für Meßzwecke auf der zweiten Anschlußschiene (10) des Leistungsschalters (1) angeordnet ist, wobei hier ein geeigneter Montageraum vorgesehen ist.Low-voltage circuit breaker according to Claim 1, characterized in that the current transformer (7) for measuring purposes is arranged on the second connecting rail (10) of the circuit breaker (1), a suitable mounting space being provided here. Niederspannungs-Leistungsschalter nach Anspruch 1, dadurch gekennzeichnet, daß der Stromwandler für Meßzwecke (7) als Rogowskiwandler ausgebildet und mit der zugehörigen Auswerteelektronik als eigenständige Baueinheit ausgeführt ist, die beim Einbau in den Leistungsschalter keiner Kalibrierung bedarf.Low-voltage circuit breaker according to Claim 1, characterized in that the current transformer for measuring purposes (7) is designed as a Rogowski transformer and is designed with the associated evaluation electronics as an independent unit which does not require any calibration when installed in the circuit breaker.
EP98250046A 1997-02-07 1998-02-06 Low voltage circuit breaker with optionally mounted measuring transducer Withdrawn EP0859395A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1997106019 DE19706019A1 (en) 1997-02-07 1997-02-07 Low-voltage circuit breakers with optionally installable measuring transducers
DE19706019 1997-02-07

Publications (2)

Publication Number Publication Date
EP0859395A2 true EP0859395A2 (en) 1998-08-19
EP0859395A3 EP0859395A3 (en) 1999-04-14

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EP98250046A Withdrawn EP0859395A3 (en) 1997-02-07 1998-02-06 Low voltage circuit breaker with optionally mounted measuring transducer

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DE (1) DE19706019A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2802017A1 (en) * 1999-12-03 2001-06-08 Schneider Electric Ind Sa HIGH-INTENSITY THREE-PHASE CUT-OFF APPARATUS WITH TWO TWIN POLES PER PHASE, PROVIDED WITH MAGNETIC COMPENSATION CIRCUITS
CN105762025A (en) * 2016-03-28 2016-07-13 杭州仕邦电力科技有限公司 Air breaking mechanism integrating measurement and protection

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10004833A1 (en) 2000-02-01 2001-08-02 Siemens Ag Multipole low-voltage circuit breaker with one current measuring device per pole
DE102005016545B4 (en) * 2005-04-08 2014-12-04 Abb Ag Module rear panel for a switchgear module, switchgear module and electrical switchgear
DE102005016543A1 (en) * 2005-04-08 2006-10-12 Abb Patent Gmbh Electrical switchgear and base module for an electrical switchgear
DE102011004968B4 (en) 2011-03-02 2014-07-10 Siemens Aktiengesellschaft Electric switch

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0154171A1 (en) * 1984-02-13 1985-09-11 General Electric Company Magnetic sensor module for a ground fault circuit interrupter
FR2599195A1 (en) * 1986-05-26 1987-11-27 Merlin Gerin Current sensor for a static trip
US4742197A (en) * 1986-03-21 1988-05-03 Bbc Brown Boveri Ltd. High-voltage switch
US5382896A (en) * 1992-03-19 1995-01-17 Merlin Gerin Measuring assembly with current sensor and supply transformer
EP0704867A1 (en) * 1994-09-29 1996-04-03 Schneider Electric Sa Release device with at least a current transformer

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0154171A1 (en) * 1984-02-13 1985-09-11 General Electric Company Magnetic sensor module for a ground fault circuit interrupter
US4742197A (en) * 1986-03-21 1988-05-03 Bbc Brown Boveri Ltd. High-voltage switch
FR2599195A1 (en) * 1986-05-26 1987-11-27 Merlin Gerin Current sensor for a static trip
US5382896A (en) * 1992-03-19 1995-01-17 Merlin Gerin Measuring assembly with current sensor and supply transformer
EP0704867A1 (en) * 1994-09-29 1996-04-03 Schneider Electric Sa Release device with at least a current transformer

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2802017A1 (en) * 1999-12-03 2001-06-08 Schneider Electric Ind Sa HIGH-INTENSITY THREE-PHASE CUT-OFF APPARATUS WITH TWO TWIN POLES PER PHASE, PROVIDED WITH MAGNETIC COMPENSATION CIRCUITS
EP1107269A1 (en) * 1999-12-03 2001-06-13 Schneider Electric Industries SA Three-phase circuit breaker for high current with twin poles per phase, provided with compensation magnetic circuit
US6337613B1 (en) 1999-12-03 2002-01-08 Schneider Electric Industries Sa Three-phase high-current switchgear apparatus with twinned poles per phase, equipped with magnetic compensation circuits
CN105762025A (en) * 2016-03-28 2016-07-13 杭州仕邦电力科技有限公司 Air breaking mechanism integrating measurement and protection
CN105762025B (en) * 2016-03-28 2018-01-19 杭州仕邦电力科技有限公司 A kind of air break mechanism for measuring and protecting integration

Also Published As

Publication number Publication date
DE19706019A1 (en) 1998-08-13
EP0859395A3 (en) 1999-04-14

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