EP3142134A1 - Assistenzsystem zur detektion einer störung eines trennschalters, das an mittel- und hochspannungen angepasst ist - Google Patents

Assistenzsystem zur detektion einer störung eines trennschalters, das an mittel- und hochspannungen angepasst ist Download PDF

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Publication number
EP3142134A1
EP3142134A1 EP15290229.2A EP15290229A EP3142134A1 EP 3142134 A1 EP3142134 A1 EP 3142134A1 EP 15290229 A EP15290229 A EP 15290229A EP 3142134 A1 EP3142134 A1 EP 3142134A1
Authority
EP
European Patent Office
Prior art keywords
contact
movable
stop
disconnector
downstream
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Withdrawn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
EP15290229.2A
Other languages
English (en)
French (fr)
Inventor
Vincent Julien
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 EP15290229.2A priority Critical patent/EP3142134A1/de
Priority to PCT/EP2016/070111 priority patent/WO2017045894A1/fr
Publication of EP3142134A1 publication Critical patent/EP3142134A1/de
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H5/00—Snap-action arrangements, i.e. in which during a single opening operation or a single closing operation energy is first stored and then released to produce or assist the contact movement
    • H01H5/04—Energy stored by deformation of elastic members
    • H01H5/06—Energy stored by deformation of elastic members by compression or extension of coil springs
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
    • H01H3/30—Power arrangements internal to the switch for operating the driving mechanism using spring motor
    • H01H3/3052—Linear spring motors
    • 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
    • H01H33/02—Details
    • H01H33/28—Power arrangements internal to the switch for operating the driving mechanism
    • H01H33/40—Power arrangements internal to the switch for operating the driving mechanism using spring motor
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2300/00—Orthogonal indexing scheme relating to electric switches, relays, selectors or emergency protective devices covered by H01H
    • H01H2300/052—Controlling, signalling or testing correct functioning of a switch

Definitions

  • the present invention relates to a system for assisting in the detection of a failure of a disconnector adapted to high voltages A (HTA - typically between 1kV and 52kV) and high voltages B (HTB - typically greater than 52kV) and a method detection device for detecting a failure of a system for moving an arc contact or a main contact of a disconnector according to the preamble of claims 1 and 5.
  • a function of circuit breaker or disconnector installations is to be able to connect, but above all to disconnect electrical connection elements which are generally enclosed in an enclosure filled with an insulating medium, such as sulfur hexafluoride, intended to limit the creation of arcing during the connection / disconnection of said electrical connection elements.
  • Such installations are, for example, metal insulated switchgear (GIS) type metal-wrapped substations.
  • GIS metal insulated switchgear
  • a disconnector comprises a connector or movable main contact to be inserted into or removed from a fixed main connector or contact, said movable main contact being generally coupled to a movable arcing contact, the latter being intended to be inserted into or removed from a fixed arc contact with said fixed contact.
  • the movable main contact may also have the arcing contact function, and in this case, a single moving contact is present in the disconnector.
  • the fixed main contact and the fixed arcing contact are connected to a first electrical apparatus, and the movable contact and moving arcing contact are connected to a second electrical apparatus.
  • the contacting of the main contacts and the arcing contacts closes the electrical circuit connecting the first and second electrical equipment.
  • the separation of said contacts opens said circuit and disconnects the first electrical equipment of the second electrical equipment.
  • One of said electrical equipment may for example be an earthing system in the case of a earthing switch.
  • Arc contacts are conventionally used to delay the moment of appearance of an electric arc with respect to the moment of disconnection of the main contacts and to limit the duration of such an arc, in particular in order to reduce wear of the fixed contacts. and mobile, and a pollution of the insulating medium in which said contacts are located.
  • said movable arcing contact is coupled to the movable main contact by a displacement device, typically a spring device, allowing on the one hand a disconnection of the arcing contacts taking place after disconnection of the main contacts, and on the other hand on the other hand, a sudden acceleration of the moving arcing contact making it possible to instantly increase the spacing between the fixed arcing contact and the movable arcing contact when the main contacts (fixed and mobile) are already disconnected and gradually moving away from each other at a constant speed during a disconnection phase, ie opening of the electrical circuit connecting the first electrical equipment to said second electrical equipment.
  • the movable arcing contact is positioned in a chamber within said movable main contact, the latter being at a final disconnection position.
  • a problem of the disconnectors comprising fixed and movable contacts as previously described is related to the failure of the device for moving the movable arcing contact, for example a failure of the spring equipping said device thus preventing the sudden acceleration of the contact.
  • moving arc during the phase of removal of the main contacts after their disconnection and its displacement of the position in contact with the fixed arcing contact at a position inside said moving main contact.
  • a break in said spring disturbs the displacement of the movable arcing contact which may be partially in said chamber within said movable main contact causing a dangerous malfunction of the disconnector.
  • a portion of said moving arcing contact can then protrude out of said chamber, thereby decreasing the separation distance between the fixed and moving contacts and allowing the creation of an electric arc between said movable arcing contact and a contact (Mobile or arc) fixed while a position indicator of said disconnector indicate that the circuit between the first electrical equipment and the second electrical equipment is open, since said position indicators only detect the positioning of the moving main contact.
  • the movable main contact has reached a correct position once the disconnector is open, the position indicator then indicates a correct opening of the disconnector, but the movable arcing contact is positioned incorrectly and can endanger, for example, a maintenance staff.
  • An object of the present invention is to provide a system for assisting in the detection of a failure of the positioning of the arcing contact or of the main contact of a disconnector after disconnection of the first and second electrical equipment, ie opening of the circuit electrical connection connecting said first electrical equipment to said second electrical equipment, said system to be simple and effective.
  • Another aim is to propose a system for assisting in the detection of a failure of a disconnector requiring a small number of mechanical parts making it possible to optimize the masses of moving elements, the size and the disconnection speeds for said switch.
  • the present invention also relates to a disconnector, for example according to said first or second embodiment, equipped with said system for assisting the detection of a failure.
  • the figure 1 presents a system for assisting in the detection of a failure equipping a disconnector according to a first embodiment.
  • the figure 2 presents a system for assisting the detection of a failure according to the invention equipping a disconnector according to a second embodiment.
  • the disconnectors according to the first or second embodiment comprise in particular a breaking chamber 1 configured to be hermetically closed in order to enclose an insulating medium, at least one fixed contact 2, said fixed contact may comprise a fixed main contact 21 and a fixed arc contact 22, at least one movable contact 3, said movable contact 3 illustrated in FIG.
  • FIG 1 also acting as an arc contact
  • the disconnector comprises two movable contacts, respectively a movable main contact 31 and a movable arcing contact 32, said disconnectors further comprising a first displacement device 4 and a second displacement device 5, said first displacement device 4 being intended to moving an element 41 from a first upstream position close to the fixed contact 2 to a first downstream position remote from said fixed contact 2, said element being said moving main contact 31 in the case of the second embodiment of said disconnector, said second switching device being displacement 5 comprising, for example, elastic return means, in particular a spring, so as to store elastic potential energy during at least part of the displacement of said element 41 or moving main contact 31 from the first upstream position to the first position swallows, and suddenly release the potential energy accumulated in the form of kinetic energy to drive in motion at least a portion of the movable contact 3, in particular the entire movable contact 3 in the case of the first embodiment of the disconnector and the movable arcing contact 32 in the case of the second
  • Each of said disconnectors represented in figure 1 and in figure 2 further comprises a position indicator 6 for detecting the position of said element 41, ie said movable main contact 31 in the case of the second embodiment, in order to determine whether said element 41 (or movable main contact 31 in the case of the figure 2 ) is at said first upstream position when the disconnector is closed, or at said first downstream position when the disconnector is open.
  • Said position indicator is in particular configured to indicate a failure of said isolator if said disconnector is open, while said element 41 (or movable main contact 31 in the case of the figure 2 ) is not in the first downstream position, or if said isolator is closed, while said element 41 (or movable main contact 31 in the case of the figure 2 ) is not in the first upstream position.
  • Such cases may occur especially if the second displacement device 5 is faulty, as illustrated in FIG. figure 9 .
  • Each of said disconnectors previously described and illustrated in Figures 1 and 2 comprise the system for assisting the detection of a failure according to the invention.
  • This detection aid system comprises a first stop 71 configured to be installed at a moving fixed part of said disconnector, for example at a base of said disconnector or at a housing of said disconnector, a second stop 72 intended to be fixed to said part of the movable contact 3 driven in motion by said second displacement device 5, in particular, said second stop 72 is configured to be fixed to the body of the movable contact 3 in the case of the first embodiment of the disconnector and to the contact body of the contact mobile arc 32 in the case of the second embodiment of said disconnector, said fault detection aid system comprising a body 8 configured to be coupled to the first displacement device 4 so that said body 8 is moved simultaneously and at the same speed as said element 41 (or moving main contact 31 in the case of the figure 2 ), for example the body 8 comprises an attachment point 83 and a coupling means 84 intended to couple said attachment point 83 to said element 41, in particular, according to the second embodiment of the disconnector, said body 8 is intended to to be fixed to said movable main contact 31 by said coupling means 84,
  • the Figures 3-8 illustrate the opening of the disconnector according to the second embodiment when said opening is not faulty, and the figure 9 presents the result of a failure of the second displacement device 5 when opening said disconnector.
  • the Figures 3-9 thus represent the disconnector according to the second embodiment as described in figure 2 during different stages of its opening and when the latter is equipped with the fault detection aid system according to the invention.
  • the disconnector according to the invention is in the closed state.
  • This state is characterized in that the movable main contact 31 is in contact, ie electrically connected, with the fixed main contact 21 and the movable arcing contact 32 is also in contact with the fixed arc contact 22.
  • the system detection aid comprises said body 81 whose attachment point 83 is coupled to said first displacement device 4 by being fixed to said movable main contact 31 itself coupled to said first displacement device 4. Said body 81 and said contact mobile main 31 are thus drivable simultaneously and in particular at the same speed in motion, for example in a translational movement, by said first moving device 4 as soon as the latter is activated to open said disconnector.
  • said body 8 at its second end 82 abuts against said second stop 72 and its first end 81 in position A with respect to said attachment point 83.
  • said movable arcing contact is for example in the form of a rod having one end intended to come into contact with the fixed arcing contact, and the other end coupled to said second displacement device, said second abutment being preferentially fixed to the said rod, near said other end.
  • said movable main contact is of hollow cylindrical shape and radially surrounds said moving arc contact, the latter being able to be completely housed in a chamber, ie the hollow interior part of said movable main contact.
  • One end of said movable main contact is intended to come into contact with said fixed contact, the other end being coupled to said first moving device and cooperating with the second moving device to allow movement of said movable arcing contact of a position in said chamber at a position outside said chamber and vice versa.
  • the first displacement device is in particular configured to move respectively said element (first embodiment) or said movable main contact (second embodiment) in a rectilinear motion, in particular a uniform rectilinear movement
  • the second displacement device is in particular configured to respectively move the moving contact or said movable arcing contact (according to the chosen embodiment) in a rectilinear motion, in particular a varied rectilinear motion, so that the speed V '(t) of said movable contact, or respectively said movable arc contact, is transiently greater than the speed V (t) of said element, respectively said movable main contact.
  • said body 8 is in particular in the form of a rod, said attachment point 83 being preferably arranged in the middle of said rod along its length so that said ends 81, 82 can rotate around said attachment point 83 when the latter stumble against their respective stops.

Landscapes

  • Keying Circuit Devices (AREA)
  • Gas-Insulated Switchgears (AREA)
EP15290229.2A 2015-09-14 2015-09-14 Assistenzsystem zur detektion einer störung eines trennschalters, das an mittel- und hochspannungen angepasst ist Withdrawn EP3142134A1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP15290229.2A EP3142134A1 (de) 2015-09-14 2015-09-14 Assistenzsystem zur detektion einer störung eines trennschalters, das an mittel- und hochspannungen angepasst ist
PCT/EP2016/070111 WO2017045894A1 (fr) 2015-09-14 2016-08-25 Système d'aide à la détection d'une défaillance d'un sectionneur adapté aux moyennes et hautes tensions

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP15290229.2A EP3142134A1 (de) 2015-09-14 2015-09-14 Assistenzsystem zur detektion einer störung eines trennschalters, das an mittel- und hochspannungen angepasst ist

Publications (1)

Publication Number Publication Date
EP3142134A1 true EP3142134A1 (de) 2017-03-15

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP15290229.2A Withdrawn EP3142134A1 (de) 2015-09-14 2015-09-14 Assistenzsystem zur detektion einer störung eines trennschalters, das an mittel- und hochspannungen angepasst ist

Country Status (2)

Country Link
EP (1) EP3142134A1 (de)
WO (1) WO2017045894A1 (de)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3001081A1 (fr) * 2013-01-14 2014-07-18 Alstom Technology Ltd Sectionneur a contact d'arc rotatif
US20140346147A1 (en) * 2011-12-14 2014-11-27 Alstom Technology Ltd. Mobile Conducting Unit for a Breaker, Including a Spring for Accelerating the Separation of Arc Contacts
FR3016470A1 (fr) * 2014-01-14 2015-07-17 Alstom Technology Ltd Sectionneur a detection de defaillance d'un ressort d'acceleration d'un contact d'arc

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140346147A1 (en) * 2011-12-14 2014-11-27 Alstom Technology Ltd. Mobile Conducting Unit for a Breaker, Including a Spring for Accelerating the Separation of Arc Contacts
FR3001081A1 (fr) * 2013-01-14 2014-07-18 Alstom Technology Ltd Sectionneur a contact d'arc rotatif
FR3016470A1 (fr) * 2014-01-14 2015-07-17 Alstom Technology Ltd Sectionneur a detection de defaillance d'un ressort d'acceleration d'un contact d'arc

Also Published As

Publication number Publication date
WO2017045894A1 (fr) 2017-03-23

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