EP0303698A1 - Interrupteur limiteur de courant - Google Patents

Interrupteur limiteur de courant Download PDF

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Publication number
EP0303698A1
EP0303698A1 EP87902870A EP87902870A EP0303698A1 EP 0303698 A1 EP0303698 A1 EP 0303698A1 EP 87902870 A EP87902870 A EP 87902870A EP 87902870 A EP87902870 A EP 87902870A EP 0303698 A1 EP0303698 A1 EP 0303698A1
Authority
EP
European Patent Office
Prior art keywords
contact
pair
current
electrodynamic
connection
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Withdrawn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
EP87902870A
Other languages
German (de)
English (en)
Other versions
EP0303698A4 (fr
Inventor
Igor Mikhailovich Kruglyansky
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.)
VSESOJUZNY NAUCHNO-ISSLEDOVATELSKY I PROEKTNO-KONSTR INST AVTOM ELEKTROP V PROMSHLENNOSTI SELSKOM KHOZYASTVE I NA TRANSP
Original Assignee
VSESOJUZNY NAUCHNO-ISSLEDOVATELSKY I PROEKTNO-KONSTR INST AVTOM ELEKTROP V PROMSHLENNOSTI SELSKOM KHOZYASTVE I NA TRANSP
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 VSESOJUZNY NAUCHNO-ISSLEDOVATELSKY I PROEKTNO-KONSTR INST AVTOM ELEKTROP V PROMSHLENNOSTI SELSKOM KHOZYASTVE I NA TRANSP filed Critical VSESOJUZNY NAUCHNO-ISSLEDOVATELSKY I PROEKTNO-KONSTR INST AVTOM ELEKTROP V PROMSHLENNOSTI SELSKOM KHOZYASTVE I NA TRANSP
Publication of EP0303698A1 publication Critical patent/EP0303698A1/fr
Publication of EP0303698A4 publication Critical patent/EP0303698A4/fr
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H77/00—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting
    • H01H77/02—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism
    • H01H77/10—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with electrodynamic opening

Definitions

  • the present invention relates to electrical engineering, namely switches, and in particular relates to a current-limiting load switch.
  • the modern development of electrical engineering is characterized by a rapid development of power converter technology.
  • the converter devices made up of semiconductor components - thyristors and diodes - are extremely sensitive to overloads, and switches are required for their use, which have a very high fast action and a high current limiting capacity.
  • An automatic load switch (SU, A, 296172) which has a pair of contacts, one contact of which is rigidly connected and switched on to an electrodynamic current limiter by means of contact pressure, while the other is in contact with a device for displacing it and Festhaltunö is kinematically connected, which is kinematically connected to an emergency signal transmitter, has an arc quenching chamber and two power connections for switching on a load. One power connection is connected to the other contact of the contact pair and the other to the electrodynamic current limiter.
  • the current flowing through the load to the contact opening in the contact pair must increase with the aid of the electrodynamic current limiter to a value at which the contacts are opened, which likewise affects the current limiting capacity and extends the switch-on time.
  • a current-limiting load switch (FR, B, 8107360) which has at least one pair of contacts, one of which is a contact provided with a means for contact pressure and rigidly connected to an electrodynamic current limiter which is electrically coupled to a controllable pulse current source, and at least one emergency signal generator which is kinematically connected to a device for shifting and holding the contact, which is connected to the other contact of the Contact pair is kinematically connected, a device for extinguishing an arc that arises between the contacts of the contact pair and, according to the number of contact pairs, contains a pair of power connections, one of which is connected to the other contact of the contact pair.
  • the emergency signal generator which is connected to the controllable pulse current source, is connected to a power connection, while the other power connection is connected to the electrodynamic current limiter and the controllable pulse current source.
  • a current is used for the contact opening in the contact pair, which current is generated in the controllable pulse current source and is passed through the contact pair and the electrodynamic current limiter.
  • the electrodynamic current limiter is in the load circuit in the known current-limiting load switch, the working current flows through it. Given the given quick action, this leads to a deterioration in the technical and economic characteristics of the switch, because dimensions, metal intensity, energy losses and costs increase.
  • the use of the emergency signal transmitter which is located in the load circuit to be switched off for the contact opening of the contact pair, results in an increase in the response time of the device for moving and holding the contact as a result of a low sensitivity of such emergency signal transmitter, which also worsens the technical and economic characteristics.
  • the invention has for its object to provide a current-limiting circuit breaker with such a connection of its components that allows the flow of only the pulse current through the electrodynamic current limiter.
  • the at least one contact pair one of whose contacts is provided with a means for contact pressure and is rigidly connected to an electrodynamic current limiter, which is electrically coupled to a controllable pulse current source, at least one emergency signal transmitter, which is kinematically connected to a device for shifting and holding the contact, which is kinematically connected to the other contact of the contact pair, a device for extinguishing an arc which arises between the contacts of the contact pair and, according to the number of contact pairs, a pair of power connections, of which one is connected to the other contact of the contact pair, contains, according to the invention, the other power connection of the pair of power connections is connected to the contact of the contact pair, which is rigidly connected to the electrodynamic current limiter, which with a Em connection is provided, to which the controllable pulse current source is applied via the emergency signal generator.
  • the electrodynamic current limiter is electrically isolated from the contact of the pair of contacts to which the other power connector of the pair of power connectors is connected and provided with an additional connector to which the controllable pulse current source is coupled.
  • the controllable pulse current source is connected via one of them to the connection of the electrodynamic current limiter, while the other emergency signal transmitters are each connected to a power connection of the pair of power connections, which is connected to the other contact of the contact pair, and to the controllable pulse current source or are connected to a power connection of the pair of power connections, which is applied to the other contact of the contact pair.
  • the electrodynamic current limiter is removed from the load circuit to be switched off and only the pulse current flows through it from the controllable pulse current source, the dimensions of the load switch and the energy losses associated with its operation are significantly reduced.
  • the activation of the emergency signal generator in the circuit of the controllable pulse current source makes it possible to use an encoder which is dimensioned for a smaller current and has a higher sensitivity.
  • the current-limiting load switch contains at least one pair of contacts - in the present embodiment, two contact bars 1 (FIG. 1), 2, which have contacts 3, 4, and 5, 6.
  • Each of the contacts 3, 5 is provided with a corresponding means 7.2 for the contact pressure, which in the present embodiment is a spring, and rigidly connected to a corresponding electrodynamic current limiter 9, 10.
  • the other contacts 4, 6 of the respective contact pairs 1, 2 are kinematically connected to a device 11 for moving and holding the contacts (the kinematic connection with the contacts 4, 6 is indicated in the drawing by the dashed line).
  • the device 11 for moving and holding the contacts can, for example, be a mechanical system Represent springs and toggle levers, which enables closing and opening of contacts 3, 4 and 5, 6 of contact pairs 1, 2.
  • the device 11 for moving and holding the contacts is kinematically connected to at least one emergency signal transmitter - in the present embodiment with three emergency signal transmitters 12, 13, 14, which represent, for example, electromagnetic triggers (the kinematic connection is indicated by the dashe
  • the electrodynamic current limiters 9, 10 are provided with connections 15, 16, to which a controllable pulse current source 17 is connected via the emergency signal generator 12 and is constructed, for example, from a series connection of a capacitor and a thyristor.
  • the current-limiting load switch contains, in accordance with the number of contact pairs 1, 2, respective devices 18, 19 for extinguishing arcs arising between contacts 3, 4 and 5, 6 of contact pairs 1, 2 and a pair of power connections 20, 21 and 22, 23 for Switching on a load 24.
  • the power connections 20, 22 are connected to the contacts 3.5 of the contact pairs 1, 2, which are rigidly connected to the electrodynamic current limiters 9, 10, while the other power connections 21, 23 to the contacts 4, 6 Contact pairs 1,2 are placed.
  • emergency signal generators 12, 13, 14, emergency signal generators 13, 14, which are connected to controllable pulse current source 17 are coupled to power connections 21, 23.
  • the contacts 4, 6 are arranged on a common traverse 25.
  • the electrodynamic current limiters 9, 10 are electrically insulated from the contacts 3.5 of the contact pairs 1, 2 rigidly connected to them by insulators 26, 27 (FIG. 2) (for example from plates of textolite) and provided with additional connections 28, 29 to which the controllable pulse current source 17 is connected.
  • the emergency signal transmitters 13, 14 are applied to the contacts 4, 6 of the contact pairs 1, 2, while the controllable pulse current source 17 is not electrically connected to them.
  • the load 24 is connected to the power connections 21, 23 via the emergency signal generators 13, 14.
  • the current limiting load switch works as follows.
  • the size and duration of the pulse current must be such that the device 11 for moving and holding the contacts responds and the movement of the contacts 4, 6 begins before the repelled contacts 3, 5 have returned to the starting position.
  • the pulse current is caused by passing through the the controllable pulse current source 17 and the electrodynamic current limiters 9, 10 lying emergency signal transmitter 12 flows, an acceleration of the process of triggering the device 11 for moving and holding the contacts.
  • the mode of operation of the current-limiting circuit breaker shown in FIG. 2 is essentially analogous to that described above. If electrical insulators 26, 27 (FIG. 2) are present, the pulse current flows through the circuit at the moment an emergency situation occurs: emergency signal transmitter 12, connections 15, 16 of the electrodynamic current limiters 9, 10, electrodynamic current limiters 9, 10, connections 28, 29 of the Current limiter 9, 10, controllable pulse current source 17.
  • the load 24 is switched off in the same order as described above.
  • the present invention can be successfully used to protect consumers sensitive to overloads, particularly thyristor power converters.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Junction Field-Effect Transistors (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Insulated Gate Type Field-Effect Transistor (AREA)

Abstract

Un interrupteur limiteur de courant comprend au moins une paire de contacts (1, 2) dont l'un des contacts (3, 5) est rigidement connecté à un limiteur (9, 10) électro-dynamique de courant électriquement connecté à une source de courant (17) à impulsions contrôlées, et au moins un capteur (12, 13, 14) d'état d'urgence cinématiquement connecté à une unité (11) de déplacement et de fixation du contact cinématiquement connecté à l'autre contact (4, 6) de la paire de contacts (1, 2). L'interrupteur limiteur de courant comprend, selon le nombre de paires de contacts (1, 2), au moins une paire de conducteurs auxiliares de charge (20, 21, 22, 23) dont l'un des conducteurs est connecté à l'autre contact (4, 6) de la paire de contacts (1, 2), alors que l'autre conducteur est connecté au contact (3, 5) rigidement connecté au limiteur électro-dynamique de courant (9, 10) pourvu d'un conducteur auxiliaire (15, 16). La source de courant pulsé (17) est connectée à ce conducteur auxiliaire (15, 16) par le capteur (12) d'état d'urgence.
EP19870902870 1987-02-24 1987-02-24 Interrupteur limiteur de courant. Withdrawn EP0303698A4 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/SU1987/000026 WO1988006801A1 (fr) 1987-02-24 1987-02-24 Interrupteur limiteur de courant

Publications (2)

Publication Number Publication Date
EP0303698A1 true EP0303698A1 (fr) 1989-02-22
EP0303698A4 EP0303698A4 (fr) 1990-03-27

Family

ID=21617082

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19870902870 Withdrawn EP0303698A4 (fr) 1987-02-24 1987-02-24 Interrupteur limiteur de courant.

Country Status (5)

Country Link
US (1) US5051859A (fr)
EP (1) EP0303698A4 (fr)
JP (1) JPH01502378A (fr)
FI (1) FI884870A (fr)
WO (1) WO1988006801A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007095874A1 (fr) * 2006-02-23 2007-08-30 Siemens Aktiengesellschaft Dispositif de coupure en surintensité

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2713439C1 (ru) * 2019-07-24 2020-02-05 Виктор Иванович Мрыхин Способ ограничения тока короткого замыкания и устройство для его осуществления

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU752548A1 (ru) * 1978-04-10 1980-07-30 За витель Селективный токоограничивающий автоматический выключатель
US4258345A (en) * 1979-01-29 1981-03-24 Westinghouse Electric Corp. Circuit interrupter with magnetic arc stretcher
SU743070A1 (ru) * 1979-04-09 1980-06-25 Предприятие П/Я Г-4485 Автоматический выключатель
DE3021867A1 (de) * 1980-06-11 1981-12-17 Brown, Boveri & Cie Ag, 6800 Mannheim Selbstschalter
FR2485254A1 (fr) * 1980-06-19 1981-12-24 Merlin Gerin Disjoncteur miniature unipolaire et neutre
FR2503929A1 (fr) * 1981-04-13 1982-10-15 Kruglyansky Igor Procede d'interruption automatique de la charge et interrupteur automatique de la charge pour la mise en oeuvre de ce procede
JPS57189414A (en) * 1981-05-19 1982-11-20 Tokyo Shibaura Electric Co Circuit breaker

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8806801A1 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007095874A1 (fr) * 2006-02-23 2007-08-30 Siemens Aktiengesellschaft Dispositif de coupure en surintensité

Also Published As

Publication number Publication date
FI884870A0 (fi) 1988-10-21
FI884870A (fi) 1988-10-21
WO1988006801A1 (fr) 1988-09-07
US5051859A (en) 1991-09-24
JPH01502378A (ja) 1989-08-17
EP0303698A4 (fr) 1990-03-27

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