EP0087642B1 - Leitungsschutzschalteranordnung, geeignet als Vorautomat - Google Patents

Leitungsschutzschalteranordnung, geeignet als Vorautomat Download PDF

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Publication number
EP0087642B1
EP0087642B1 EP83101295A EP83101295A EP0087642B1 EP 0087642 B1 EP0087642 B1 EP 0087642B1 EP 83101295 A EP83101295 A EP 83101295A EP 83101295 A EP83101295 A EP 83101295A EP 0087642 B1 EP0087642 B1 EP 0087642B1
Authority
EP
European Patent Office
Prior art keywords
circuit breaker
circuit group
protective circuit
switch
contact body
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
Application number
EP83101295A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0087642A1 (de
Inventor
Rudolf Dipl.-Phys. Scherbaum
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
Priority to AT83101295T priority Critical patent/ATE19837T1/de
Publication of EP0087642A1 publication Critical patent/EP0087642A1/de
Application granted granted Critical
Publication of EP0087642B1 publication Critical patent/EP0087642B1/de
Expired 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
    • H01H77/06—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 electromagnetic opening
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
    • H01H33/88—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts
    • H01H33/90—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism
    • H01H33/901—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism making use of the energy of the arc or an auxiliary arc
    • H01H33/903—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism making use of the energy of the arc or an auxiliary arc and assisting the operating mechanism

Definitions

  • the invention relates to a circuit breaker arrangement according to the preamble of claim 1.
  • a circuit breaker is preceded by a current limiting device which essentially consists of folding contacts which are held in a holding frame by a spring in the closed state are and their movable contact can be attracted by a core with a current coil and transferred to the open position.
  • the current flowing through the contact pieces is fed via the current coil to a circuit breaker arrangement in a common housing. If the contacts are open, a drawn arc is put out.
  • Contact arrangement, quenching plates and current coil are located in a larger area of a common housing with the circuit group with the function of a conventional circuit breaker.
  • the first circuit group of the known circuit breaker arrangement should respond shortly before the second circuit group is triggered, with a drawn arc being present longer and representing a current limiting resistor which increases the breaking capacity of the entire circuit breaker arrangement.
  • pre-automats which are to be arranged between the house connection fuse and a distribution with miniature circuit breakers, are required: In the event of a short circuit behind a miniature circuit breaker, the pre-automat should open a contact path to support the disconnection work of the miniature circuit breaker. When the short circuit is switched off, the pre-automat should be in the switched on state again. If, on the other hand, there is a short circuit between the pre-circuit breaker and the circuit breaker, the pre-circuit breaker should take over the switch alone without causing the house connection fuse to respond. It is said that a miniature circuit breaker must be selective in relation to the upstream pre-automatic device, but the pre-automatic device in turn must be selective in relation to an upstream house connection fuse.
  • the thermal release with a delayed action is heated up until it initiates the final switch-off.
  • This can be described as a pumping behavior, which brings with it multiple stresses on the contacts as well as unsatisfactory selectivity behavior of the pre-automatic machine for securing the house connection.
  • the invention has for its object to develop a circuit breaker arrangement that works with a compact, simple and versatile tunable holding device and that allows commercially available circuit breakers to be used as a component.
  • the solution to the described problem lies in a circuit breaker arrangement of the type described at the outset, which has the features according to the characterizing part of patent claim 1.
  • the first circuit group can be coordinated in an obvious manner by changes to the switching chamber, the field winding, to the movable contact body, to the narrower space with the contact bodies and its limitation by the pressure piston of the support body as well as to the ventilation slots and the energy accumulator. Nevertheless, these components can be arranged compactly in a single switching chamber, which also serves as a mechanical holder.
  • the first circuit group can be arranged under the basis of a circuit breaker that forms the second circuit group.
  • a circuit breaker that forms the second circuit group.
  • an electrodynamic current limiter EP-A1-0003447
  • an interaction between a busbar in the miniature circuit breaker and an anti-parallel flow through the contact rail of the current limiter is used. This presupposes coordinated assemblies and prevents free modular assembly.
  • the entire circuit arrangement can be assembled like a component or housed in a common housing.
  • Such a circuit breaker arrangement is generally suitable for selective circuit breakers arranged one behind the other and not only for pre-automatic devices.
  • such a circuit breaker arrangement can also be designed only as a circuit breaker with an upstream current limiter.
  • the first circuit group has a switching chamber in which at least one movable contact body made of magnetic material forms a movable coil core to form an excitation winding.
  • This coil core is pressed against a second contact body by an energy store. Vent slots are formed in the wall of the switching chamber over the running distance of the coil core.
  • the contact body and the field winding are electrically connected to one another in series. If a short-circuit current is so strong that an arc plasma with sufficient pressure is created that lifts the contact body made of magnetic material, the coil core, from the counter-contact body, the circuit breaker arrangement generates a resistance that limits the current flowing through the circuit breaker arrangement, as is the case with upstream ones Current limiters are known. Only when the current limitation is not sufficient does the second circuit group lead to a final shutdown.
  • the switching chamber of the first circuit group can have a gas-emitting material on its inside in a manner known per se in order to support the current limitation.
  • a particularly simple construction results if the switching chamber of the first circuit group is cylindrical.
  • the ventilation slots of the switching chamber of the first circuit group can be designed in terms of flow technology in such a way that there is a low flow resistance when the movable contact body enters the running path and there is a high flow resistance when it returns. This prevents harmful overpressure and still maintains a current-limiting resistance for a long time.
  • high-voltage switches it is known per se to limit a contact space by means of a piston on a contact pin and to brake the piston flung away when the contact opens in a catch cup with side ventilation holes (US-A-1696604).
  • the ventilation openings are primarily used not for metered braking, but for a delayed return.
  • the circuit breaker arrangement according to FIG. 2 has two circuit groups 2.
  • a triggering device acts directly on a switch contact device 3 of the first circuit group 1 and its opening engagement is maintained by a holding device 4 until a predetermined switch-off time.
  • a triggering device 5 in the exemplary embodiment a magnetic trigger 6 and a thermal trigger 7, is directly engaged with a switch lock 8.
  • the key switch acts on a contact device 9.
  • the arc that arises between the contact bodies 15 and 14 forms a plasma, the pressure of which pushes the movable contact body 14 away by means of its pressure piston 19 against the force of the energy store 17.
  • the movable contact body 14 is made of magnetic material, an opening-supporting force from the excitation winding 12 acts on it, the coil core of which it represents.
  • the plunger anchor principle DE-C-504329
  • plasma and excitation winding 12 together form the triggering device.
  • the holding device to keep the contacts open is determined by the field winding and the dimensioning of the ventilation slots. With a lower requirement, only one precaution is sufficient.
  • the pressure of the plasma can additionally be reduced by venting slots 18, as is known per se in high-voltage switches (US-A -1696604).
  • a rod-shaped electrode with a piston defining a contact space is then thrown axially under the action of liquid evaporating in the arc to open the contacts, and the piston is braked in a cup with side ventilation openings.
  • the plasma pressure keeps the contacts open until the current is limited to such an extent that the plasma pressure cannot be maintained in order to keep the switch contact device 3 open. The closing movement will decrease initiated plasma pressure through the energy store 17.
  • the ventilation slots 18 can be designed as illustrated in the lower right in FIG. 2, so that they have an increased resistance when closing.
  • the known flow technology measures are available for this.
  • the ventilation slots can be arranged at an incline in a flow-favorable manner in the opening direction and consequently at an acute angle to the closing direction, as can be seen from FIG. 2.
  • the first circuit group 1 can be arranged under the basis of a circuit breaker 20 according to FIG. 2, since it requires little space.
  • the holding device 4 with the switching chamber 13 can be designed to support the plasma pressure, that is to say the opening of the switching contact device 3, at least on the inside in a manner known per se from gas-emitting material.
  • the movable contact body 14 of the first circuit group 1 can be formed in detail from a support body 21 made of magnetic material, with a pressure piston 19 and a support 22 for the energy store 17.
  • the support body has a contact body 14 on its end face.
  • the contact body 14 or a contact piece is expediently made of weld-proof material.
  • the ventilation slots 18 can be designed in terms of flow technology in such a way that there is a lower flow resistance when the movable contact body 14 enters the running path and there is a higher flow resistance when it returns. In the simplest case, this can be achieved by tilting the ventilation slots, as can be seen from FIG. 2.
  • the switching gas can escape in the opening direction with less deflection, whereas the switching gas must escape with a large deflection during the closing process.
  • the support 22 for the energy accumulator 17 can be designed as a second, denser pressure piston at a suitable location.
  • the pressure piston 19 can leave a gap at its edge, which becomes effective after the initial space has been slightly opened.
  • the pressure piston 19 is sealed in the closing direction by an annular cylindrical seal 23 according to FIG. 2, so that even small overcurrents open the contact device 2 and thus find a current limitation.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Breakers (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Push-Button Switches (AREA)
  • Circuit Breakers (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Electronic Switches (AREA)
  • Switches That Are Operated By Magnetic Or Electric Fields (AREA)
EP83101295A 1982-02-23 1983-02-10 Leitungsschutzschalteranordnung, geeignet als Vorautomat Expired EP0087642B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83101295T ATE19837T1 (de) 1982-02-23 1983-02-10 Leitungsschutzschalteranordnung, geeignet als vorautomat.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3206445 1982-02-23
DE19823206445 DE3206445A1 (de) 1982-02-23 1982-02-23 Leitungsschutzschalteranordnung, geeignet als vorautomat

Publications (2)

Publication Number Publication Date
EP0087642A1 EP0087642A1 (de) 1983-09-07
EP0087642B1 true EP0087642B1 (de) 1986-05-14

Family

ID=6156463

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83101295A Expired EP0087642B1 (de) 1982-02-23 1983-02-10 Leitungsschutzschalteranordnung, geeignet als Vorautomat

Country Status (8)

Country Link
EP (1) EP0087642B1 (enrdf_load_stackoverflow)
JP (1) JPS58155617A (enrdf_load_stackoverflow)
AT (1) ATE19837T1 (enrdf_load_stackoverflow)
DE (2) DE3206445A1 (enrdf_load_stackoverflow)
ES (1) ES8401280A1 (enrdf_load_stackoverflow)
GR (1) GR77935B (enrdf_load_stackoverflow)
PT (1) PT76275A (enrdf_load_stackoverflow)
ZA (1) ZA831174B (enrdf_load_stackoverflow)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3335051A1 (de) * 1983-09-28 1985-04-11 Christian Geyer GmbH & Co, 8500 Nürnberg Schaltungsanordnung fuer einen elektrischen selbstschalter
FR2573912B1 (fr) * 1984-11-26 1987-01-09 Telemecanique Electrique Interrupteur electrique a ecran
FR2616957A1 (fr) * 1987-06-18 1988-12-23 Merlin Gerin Chambre d'extinction d'arc a pression elevee

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR564384A (fr) * 1922-03-30 1923-12-28 Thomson Houston Comp Francaise Perfectionnements aux interrupteurs à huile
DE504329C (de) * 1923-04-11 1930-08-02 Siemens Schuckertwerke Akt Ges Elektromagnetischer UEberstromschalter, insbesondere in Form eines Schraubstoepsels
US3136921A (en) * 1957-12-10 1964-06-09 Westinghouse Electric Corp Circuit breakers
AT280398B (de) * 1967-12-12 1970-04-10 Siemens Ag Lasttrennschalter
FR2416541A1 (fr) * 1978-01-31 1979-08-31 Merlin Gerin Dispositif de limitation et de coupure de courant
US4229627A (en) * 1978-10-04 1980-10-21 Electric Power Research Institute, Inc. Gas puffer type current interrupter and method

Also Published As

Publication number Publication date
PT76275A (de) 1983-03-01
ES519981A0 (es) 1983-12-01
JPH0143973B2 (enrdf_load_stackoverflow) 1989-09-25
ES8401280A1 (es) 1983-12-01
ZA831174B (en) 1984-02-29
EP0087642A1 (de) 1983-09-07
ATE19837T1 (de) 1986-05-15
DE3363465D1 (en) 1986-06-19
GR77935B (enrdf_load_stackoverflow) 1984-09-25
DE3206445A1 (de) 1983-09-01
JPS58155617A (ja) 1983-09-16

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