EP2023368A1 - Disjoncteur électromécanique doté d'une fonction de séparateur réalisée de manière intégrée mais séparée - Google Patents

Disjoncteur électromécanique doté d'une fonction de séparateur réalisée de manière intégrée mais séparée Download PDF

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Publication number
EP2023368A1
EP2023368A1 EP07015383A EP07015383A EP2023368A1 EP 2023368 A1 EP2023368 A1 EP 2023368A1 EP 07015383 A EP07015383 A EP 07015383A EP 07015383 A EP07015383 A EP 07015383A EP 2023368 A1 EP2023368 A1 EP 2023368A1
Authority
EP
European Patent Office
Prior art keywords
contact bridge
circuit breaker
rotary drive
switching mechanism
mating contacts
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Withdrawn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
EP07015383A
Other languages
German (de)
English (en)
Inventor
Josef Graf
Ludwig Niebler
Johannes Voit
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 EP07015383A priority Critical patent/EP2023368A1/fr
Publication of EP2023368A1 publication Critical patent/EP2023368A1/fr
Withdrawn legal-status Critical Current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
    • H01H71/10—Operating or release mechanisms
    • H01H71/50—Manual reset mechanisms which may be also used for manual release
    • H01H71/503—Means for increasing the opening stroke of the contacts
    • 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
    • H01H71/10—Operating or release mechanisms
    • H01H71/50—Manual reset mechanisms which may be also used for manual release
    • H01H71/56—Manual reset mechanisms which may be also used for manual release actuated by rotatable knob or wheel
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
    • H01H73/02—Details
    • H01H73/04—Contacts
    • H01H73/045—Bridging contacts

Definitions

  • the present invention relates to an electromechanical circuit breaker, comprising a rotary drive, a drive arrangement, a switching mechanism, a contact bridge, mating contacts, a pressure spring and a protective device.
  • the contact bridge is spring-loaded by means of the pressure spring in the direction of the mating contacts.
  • the rotary drive is rotatable between an on and an off position. When turning from the off to the on position of the rotary drive means of the drive assembly biases the switching mechanism, so that the pressure spring lowers the contact bridge on the mating contacts. When turning from the on to the off position, the rotary drive relaxes the switching mechanism by means of the drive arrangement and gradually lifts the contact bridge away from the mating contacts.
  • the protective device triggers the switching mechanism as a function of a current flowing through the contact bridge.
  • the switch lock lifts the contact bridge away from the mating contacts.
  • Each common electromechanical circuit breaker is constructed in this way.
  • An electromechanical circuit breaker of the type described above is also known.
  • This electromechanical circuit breaker additionally has a locking lever. The locking lever is held in the event that the contact bridge is welded to the mating contacts, in a position in which he prevents manual rotation of the rotary actuator in the off position.
  • the contact bridge is held in the off position of the mating contacts so far away that overvoltage in the power grid, a rollover to the disconnected circuit is prevented.
  • This situation corresponds to the requirement "disconnector” according to IEC 60947-3.
  • This standard requires an air gap of more than 7 mm.
  • the switch lock will implement the disconnector functionality according to IEC 60947-3 or not.
  • the switch lock must be made relatively large, in the other case, it can be made smaller.
  • Applicant's Sirius series electromechanical circuit breakers for example, meet divider functionality, for example.
  • the object of the present invention is to develop such an electromechanical circuit breaker of the type mentioned that its switching mechanism is compact and realized the electromechanical circuit breaker nevertheless a disconnector functionality.
  • the electromechanical circuit breaker in addition to the previously mentioned components on a guide device.
  • the rotary drive gradually releases the guide device when turning from the off to the on position. Only the release of the guide device allows (possibly in combination with the tensioning of the switching mechanism) that the pressure spring gradually lowers the contact bridge on the mating contacts. Furthermore, the rotary drive lifts when turning from the on to the off position the contact bridge by means of the guide device gradually to a separation distance from the mating contacts. The separation distance is greater than an opening distance by which the switching mechanism in the case of triggering the contact bridge lifts from the mating contacts.
  • the guide device must realize no function in the inventive embodiment with respect to the triggering in case of failure. It simply has to be designed in such a way that it does not hinder the function of the switch lock. Therefore, the guide device must meet with respect to speed, free release, low tripping forces, etc. no requirements. It can therefore be made very simple and stable. Conversely, the opening distance achievable by the switch lock need not be so great that the disconnector functionality of IEC 60947-3 is realized. The switch lock can therefore be made small and compact.
  • the separation distance is usually between 11 ⁇ 2 times and 4 times the opening distance.
  • the opening distance may be between 1 and 3 mm, the separation distance at least 31 ⁇ 2 mm.
  • the double values must be observed.
  • the rotary drive is rotated by about 90 ° to turn the Ausin the on position.
  • other twist angles are possible.
  • the rotary drive is kept stable or lockable in the off position. Because of this it is not possible that the contact bridge is brought up to the opening distance to the mating contacts without conscious external influence.
  • the switching mechanism can act on the contact bridge in the event of tripping over the guide device. Alternatively, it is possible that the switching mechanism acts directly on the contact bridge in the event of tripping. Which of these two alternative embodiments is taken is at the discretion of the person skilled in the art.
  • the guide device is designed as a slide with two ends. One end is intended to rest on the rotary drive, the other end to rest on the contact bridge.
  • the protective device has a short-circuit release and / or an overload release. As a rule, both components are present here. In individual cases, however, it may be sufficient if the protective device has only one of the two components.
  • the switch lock preferably transfers the rotary drive into an intermediate position ("trip"), which lies between the on and the off position. In this way it is immediately apparent from outside the circuit breaker that a tripping operation has taken place.
  • the 1 to 4 show a possible embodiment of an electromechanical circuit breaker according to the invention. They will be described together below.
  • an electromechanical power switch has at least one contact bridge 1, for example three, four or five such contact bridges 1.
  • Each contact bridge 1 interacts with mating contacts 2 and thus forms a respective electrical switching path.
  • the number of switching paths is not important. The present invention will therefore be explained below in connection with a single switching path. However, it is readily applicable to electromechanical circuit breakers with multiple switching paths.
  • the contact bridge 1 is fixed in a contact bridge carrier 3.
  • a separate contact bridge carrier 3 is present for each contact bridge 1.
  • a common contact bridge carrier 3 could be present for all existing contact bridges 1.
  • the electromechanical circuit breaker has a pressure spring 4, which acts on the contact bridge 1.
  • the contact bridge 1 is spring-loaded by means of the pressure spring 4 in the direction of the mating contacts 2. It can be lowered onto the mating contacts 2 and can be lifted off from the mating contacts 2. When the contact bridge 1 is lowered onto the mating contacts 2, the switching path is closed. Current can therefore flow from an input terminal 5 via a first of the mating contacts 2, the contact bridge 1 and the other of the mating contacts 2 to a protective device 6 and from there to an output terminal 7. If the contact bridge 1, however, is lifted from the mating contacts 2, the switching path is interrupted.
  • the pressure spring 4 acts on the contact bridge 1 via the contact bridge carrier 3. In general, however, the pressure spring 4 acts directly on the contact bridge 1.
  • the contact bridge carrier 3 may for this purpose have a corresponding recess through which the pressure spring 4 is guided. The recess is in the 1 to 4 but not shown.
  • the closing of the switching path is usually done manually. In some cases it can be done by motor. It is done by operating a rotary drive 8, the between an off position (see the FIG. 2 and 3 ) and an on position (see FIG. 4 ) is rotatable about a rotation axis 9.
  • FIG. 2 and 3 shows that the rotary drive 8 is rotated by about 90 ° to rotate from the off to the on position (or back).
  • the twist angle of 90 ° is not mandatory. It could also have a different amount, for example 120 ° or 180 °. In some cases, the angle of rotation may also be less than 90 °, for example, be only 60 ° or 75 °.
  • the contact bridge 1 of the mating contacts 2 a large distance D, hereinafter referred to as separation distance D.
  • the separation distance D is for example more than 31 ⁇ 2 mm.
  • the separation distance D may be between 4 mm and 5 mm or 51 ⁇ 2 mm. Due to the opening on both sides of the contact consisting of contact bridge 1 and mating contacts 2, this distance D is sufficient to realize a disconnector functionality according to IEC 60947-3.
  • the contact bridge 1 is held at this distance D by a guide device 10.
  • the guide device 10 is supported according to the FIGS. 2 to 4 directly on the rotary drive 8 from. It thus has an end 11, which is intended to rest on the rotary drive 8. Alternatively, however, the guide device 10 could also be supported on another element which is actuated by the rotary drive 8, for example on a drive arrangement 12.
  • Another end 13 of the guide device 10 is supported - directly or via the contact bridge carrier 3 - on the contact bridge 1 from. The other end 13 is thus provided for contact with the contact bridge 1.
  • the guide device 10 is designed as a slide 10.
  • the guide device 10 could also be designed differently, for example as a cam, which is rotatably mounted about an axis.
  • a sliding plane 14 (hereinafter referred to as ramp 14), which slides on rotation of the rotary drive 8 at the first end 11 of the guide device 10 along.
  • the contact bridge 1 is gradually lowered to the mating contacts 2.
  • the lowering is effected here by the pressure spring.
  • a switching mechanism 15 is tensioned.
  • the switching mechanism 15 represents the usual transmission assembly, which can possibly cause an automatic opening of the current paths.
  • the structure of the switching mechanism 15 corresponds to the usual configuration in the prior art. For the construction of the switching mechanism 15 therefore no detailed explanations are required.
  • the clamping of the switching mechanism 15 begins only from an intermediate position which lies between the on and the off position of the rotary drive 8.
  • the intermediate position can hereby lie at any point between the on and the off position.
  • the contact bridge 1 of the mating contacts 2 has an opening distance d which is smaller than the separation distance D.
  • the separation distance D is thus - conversely spoken - greater than the opening distance d.
  • the separation distance D is preferably between 11 ⁇ 2 times and 4 times the opening distance d.
  • the opening distance d is between 1 mm and 3 mm, for example about 2 mm.
  • the rotary drive 8 is held stable or lockable in the off position.
  • the rotary drive 8 may have a small trough into which the guide device 10 is immersed when the rotary drive 8 is in the off position.
  • the region of the rotary drive 8, on which the first end 11 of the guide device 10 rests in the off position of the rotary drive 8, be encased by two small cams. through This measure ensures that the rotary drive 8 is kept stable in the off position.
  • the rotary drive 8 can be locked in the off position.
  • a pin 16 may be present, which is movable parallel to the axis of rotation 9.
  • the pin 16 can be lowered, for example, in a corresponding receptacle of a housing 17 of the electromechanical circuit breaker.
  • the lock can - as also common in the art, for example - be secured by means of a padlock or the like.
  • the current flowing through the contact bridge 1 also flows through the protective device 6. If such a current can flow, the switching mechanism 15 must be forcibly tensioned and the contact bridge 1 must be lowered onto the mating contacts 2.
  • the protective device 6 monitors the flowing current. In response to this current, the protection device 6 triggers the switching mechanism 15.
  • the protective device 6 may have, for example, a magnetically acting short-circuit release 18 for triggering the switching mechanism 15.
  • the short-circuit release 18 triggers the switching mechanism 15 immediately when the current exceeds a limit.
  • the limit is usually a multiple of the rated current of the electromechanical circuit breaker, for example, thirteen times the rated current.
  • the protective device 6 may have an overload release 19.
  • the overload release 19 triggers the switching mechanism 15 when the current is above the nominal current of the electromechanical circuit breaker for a long time, but the short-circuit release 18 does not respond.
  • the tripping characteristic the overcurrent release 19 is defined by relevant standards.
  • the switching mechanism 15 When the protective device 6 triggers the switching mechanism 15, the switching mechanism 15 lifts the contact bridge 1 (directly or via the contact bridge carrier 3) from the mating contacts 2. However, the switch lock 15 causes only a lift by the opening distance d, not a lift to the separation distance D.
  • the switching mechanism 15 acts on the contact bridge carrier 3 or on the contact bridge 1 in the case of triggering via the guide device 10. Alternatively, it would also be possible for the switching mechanism 15 to act directly on the contact bridge carrier 3 or on the contact bridge 1.
  • the triggering of the switching mechanism 15 preferably also leads to a deflection of the rotary drive 8 from the on position. It is possible that the triggering of the switching mechanism 15 converts the rotary drive 8 in the off position. Preferably, however, the switching mechanism 15 transfers the rotary drive 8 only in the intermediate position, in the prior art usually called trip position.
  • the electromechanical circuit breaker according to the invention has many advantages.
  • the variety of components can therefore be reduced, which represents a cost advantage and an advantage in material management.
  • a compact design of the electromechanical circuit breaker can be realized.

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EP07015383A 2007-08-06 2007-08-06 Disjoncteur électromécanique doté d'une fonction de séparateur réalisée de manière intégrée mais séparée Withdrawn EP2023368A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP07015383A EP2023368A1 (fr) 2007-08-06 2007-08-06 Disjoncteur électromécanique doté d'une fonction de séparateur réalisée de manière intégrée mais séparée

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP07015383A EP2023368A1 (fr) 2007-08-06 2007-08-06 Disjoncteur électromécanique doté d'une fonction de séparateur réalisée de manière intégrée mais séparée

Publications (1)

Publication Number Publication Date
EP2023368A1 true EP2023368A1 (fr) 2009-02-11

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EP07015383A Withdrawn EP2023368A1 (fr) 2007-08-06 2007-08-06 Disjoncteur électromécanique doté d'une fonction de séparateur réalisée de manière intégrée mais séparée

Country Status (1)

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EP (1) EP2023368A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014006125A1 (fr) * 2012-07-06 2014-01-09 Tyco Electronics Amp Gmbh Dispositif de commutation électrique et procédé pour le commuter celui-ci à séparation de contact dans le cas d'une protection
WO2015043632A1 (fr) * 2013-09-25 2015-04-02 Siemens Aktiengesellschaft Appareil de coupure équipé d'un système d'enclenchement brusque
EP4145486A1 (fr) * 2021-08-09 2023-03-08 Rockwell Automation Switzerland GmbH Système et procédé de détection d'un contact soudé

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5638038A (en) * 1994-11-18 1997-06-10 Alps Electric, Co., Ltd. Switch including breaker
FR2799574A1 (fr) * 1999-10-11 2001-04-13 Schneider Electric Ind Sa Contacteur-disjoncteur
DE10152425A1 (de) * 2000-10-30 2002-05-08 Fuji Electric Co Ltd Leitungsschutzschalter

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5638038A (en) * 1994-11-18 1997-06-10 Alps Electric, Co., Ltd. Switch including breaker
FR2799574A1 (fr) * 1999-10-11 2001-04-13 Schneider Electric Ind Sa Contacteur-disjoncteur
DE10152425A1 (de) * 2000-10-30 2002-05-08 Fuji Electric Co Ltd Leitungsschutzschalter

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014006125A1 (fr) * 2012-07-06 2014-01-09 Tyco Electronics Amp Gmbh Dispositif de commutation électrique et procédé pour le commuter celui-ci à séparation de contact dans le cas d'une protection
CN104412354A (zh) * 2012-07-06 2015-03-11 泰科电子Amp有限责任公司 电开关装置和具有保护情况下的触头分离的开关该电开关装置的方法
US9666397B2 (en) 2012-07-06 2017-05-30 Te Connectivity Germany Gmbh Electrical switching device and method for switching thereof with contact separation in the event of protection
WO2015043632A1 (fr) * 2013-09-25 2015-04-02 Siemens Aktiengesellschaft Appareil de coupure équipé d'un système d'enclenchement brusque
US9734960B2 (en) 2013-09-25 2017-08-15 Siemens Aktiengesellschaft Switching device having an apparatus for switching on suddenly
EP4145486A1 (fr) * 2021-08-09 2023-03-08 Rockwell Automation Switzerland GmbH Système et procédé de détection d'un contact soudé

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