EP1807852B1 - Überwachungsverfahren für eine durch relativ zueinander bewegbare kontaktstücke begrenzte trennstrecke eines elektrischen schaltgerätes sowie zugehörige vorrichtung zur ausführung des überwachungsverfahrens - Google Patents

Überwachungsverfahren für eine durch relativ zueinander bewegbare kontaktstücke begrenzte trennstrecke eines elektrischen schaltgerätes sowie zugehörige vorrichtung zur ausführung des überwachungsverfahrens Download PDF

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Publication number
EP1807852B1
EP1807852B1 EP05797275A EP05797275A EP1807852B1 EP 1807852 B1 EP1807852 B1 EP 1807852B1 EP 05797275 A EP05797275 A EP 05797275A EP 05797275 A EP05797275 A EP 05797275A EP 1807852 B1 EP1807852 B1 EP 1807852B1
Authority
EP
European Patent Office
Prior art keywords
monitoring method
contact pieces
switching device
determined
insulating medium
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.)
Not-in-force
Application number
EP05797275A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1807852A1 (de
Inventor
Manfred Meinherz
Wojciech Olszewski
Peter Schmidt
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 EP1807852A1 publication Critical patent/EP1807852A1/de
Application granted granted Critical
Publication of EP1807852B1 publication Critical patent/EP1807852B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • H01H71/04—Means for indicating condition of the switching device
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H11/00—Apparatus or processes specially adapted for the manufacture of electric switches
    • H01H11/0062—Testing or measuring non-electrical properties of switches, e.g. contact velocity
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H11/00—Apparatus or processes specially adapted for the manufacture of electric switches
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/0015—Means for testing or for inspecting contacts, e.g. wear indicator
    • H01H2001/0021—Camera or endoscope for monitoring contacts, their position or mechanism
    • 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
    • H01H71/04—Means for indicating condition of the switching device
    • H01H2071/048—Means for indicating condition of the switching device containing non-mechanical switch position sensor, e.g. HALL sensor
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
    • H01H31/26—Air-break switches for high tension without arc-extinguishing or arc-preventing means with movable contact that remains electrically connected to one line in open position of switch
    • H01H31/32—Air-break switches for high tension without arc-extinguishing or arc-preventing means with movable contact that remains electrically connected to one line in open position of switch with rectilinearly-movable contact
    • 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
    • H01H33/53—Cases; Reservoirs, tanks, piping or valves, for arc-extinguishing fluid; Accessories therefor, e.g. safety arrangements, pressure relief devices
    • H01H33/56—Gas reservoirs
    • H01H33/563—Gas reservoirs comprising means for monitoring the density of the insulating gas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/16—Indicators for switching condition, e.g. "on" or "off"
    • H01H9/168—Indicators for switching condition, e.g. "on" or "off" making use of an electromagnetic wave communication

Definitions

  • the invention relates to a monitoring method for a limited by relatively movable contact pieces separation distance of an electrical switching device, wherein a position of the contact pieces is determined to each other and the insulation resistance of an insulating medium located in the separation path is determined.
  • Another monitoring method and a device for carrying out the method is, for example, from the German utility model DE 91 13 015.8 known.
  • There is an electrical switching device whose separation distance is limited by two relatively movable contact pieces, disposed within a capsule housing. In the encapsulating a viewing window for observing the separation distance is arranged. About the viewing window observation of the relative movement between the contact pieces of the electrical switching device is possible.
  • a kinematic chain which serves to drive a movable switching contact piece, a switch position indicator and so outside of a capsule housing depict the switching position of the electrical switching device.
  • switch position display When using a switch position display can be done in case of malfunction in the kinematic chain a false display. For example, an open switching position can be displayed, although the separation distance is closed.
  • the monitoring of the contacts by visual inspection know the disadvantage that the position of the switching contact pieces itself, although it is directly visible, but no statement about the insulation resistance of the separation distance is possible.
  • the invention has for its object to provide a monitoring method by which a reliable monitoring and a secure release of a separation path of an electrical switching device is made possible.
  • the object is achieved in a monitoring method of the type mentioned in that in the presence of a predetermined distance of the contact pieces to each other and the presence of a predetermined distance associated with predetermined insulation resistance of the insulating medium, a release signal is generated by which the separation path is classified as located in the disconnected position becomes.
  • the insulation resistance of the insulating medium for example, the internal atmosphere of an enclosed system can be monitored.
  • parameters to be monitored for example, the temperature and / or the humidity of an insulating fluid can be used.
  • the monitoring method can be used in pressure-gas-insulated encapsulated medium or high-voltage switchgear, in particular in circuit breakers or earthing switches, as well as in other switching devices such as circuit breakers.
  • the predetermined distance of the contact pieces to each other can vary depending on the application of the switching device. So For example, it may be provided that one and the same switching device construction is used in different voltage levels. Accordingly, the strokes to be observed depending on the voltage level are variable, so that the distance of the switching contact pieces relative to each other can also be variably specified.
  • the predetermined insulation resistance of the insulating medium is adjusted.
  • the insulating medium is placed under an increased pressure, so that the insulation resistance to be maintained is increased while maintaining a constant distance.
  • the monitoring of the positions of the contact pieces with respect to one another can be limited to reaching end positions of the movable contact piece (s). This end position is then associated with a certain insulation resistance of the insulating medium and only when reaching the end positions and the presence of the end positions associated with minimal insulation resistance of the insulating release of the disconnected position, so that the separation section can be classified as located in the disconnected position.
  • the density of the insulating medium is determined to determine the insulation resistance.
  • insulating medium for example, fluids such as insulating gases (SF 6 , N 2 and mixtures, etc.) or insulating fluids such as oils can be used.
  • insulating gases SF 6 , N 2 and mixtures, etc.
  • insulating fluids such as oils
  • the pressure of the insulating medium is determined to determine the insulation resistance.
  • the pressure of the insulating medium for determining the insulation resistance can be used. Since the insulation resistance, for example, also depends on the fluctuations in the ambient temperature, the minimum pressure to be maintained may vary. Then appropriate conversion factors are to be used to determine the insulation resistance of the insulating medium. This is particularly necessary when it comes to outdoor switching devices whose separation sections are exposed to the atmospheric pressure, which varies depending on the weather.
  • the position of the contact pieces is determined by two mutually independent position detection devices.
  • Independently operating position detection devices ensure that an error signal can be emitted in the event of a fault of one of the position detection devices. If the information contents supplied by the position detection devices match, it can be assumed that a specific position of the contact pieces relative to one another is present. This ensures that in the case of a fault of one of the position detection devices either an error signal is emitted or a release of the separation distance can not take place. It can be provided be that the two position detecting devices monitor one and the same contact piece in its movement. This is particularly advantageous if one of the contact pieces is designed as a fixed contact piece and the other contact piece as a movable contact piece. If both contact pieces are movable, each of the position detection devices must each monitor each of the contact pieces.
  • auxiliary contacts the position of a movable contact piece is represented by auxiliary contacts.
  • auxiliary contacts which map the movement of a contact piece. This makes it possible, for example, to control indicator lights or to process the information in control devices.
  • auxiliary contacts makes it possible to easily retrofit existing switch designs with a monitoring method according to the invention.
  • an optical sensor in particular a camera, in whose detection range the movable contact piece is arranged, is used.
  • a camera allows to obtain a real image of the switching contacts.
  • the state of the switching contacts can also be monitored.
  • optical sensors for example, photoelectric sensors or the like can be used, which registers the progress of a switching movement, for example, arranged on the switching contact markings.
  • an identification feature of the switching device is assigned at least one size to be determined in order to unambiguously assign the enable signal to a specific switching device.
  • an identification feature of the switching device By assigning an identification feature of the switching device to be determined size of the information about a state is additionally associated with a location information. This allows further processing of the state information together with the location information. As a result, it is unlikely that there will be any confusion or interchanging of individual information during processing.
  • a simple possibility of assigning an identification feature to a variable to be determined is the use of a camera for monitoring the movement of a movable contact piece.
  • a coding for example a color code, an alphanumeric code, a barcode, etc. may be arranged, which allows an association of monitored switching movement and switching device.
  • the position of a movable contact piece can be determined automatically, on the other hand, the information about the location of the monitored contact piece can be filtered out of the image. If now the further information on the insulation resistance or information of another alternative possibility of position monitoring is linked, the derived enable signal can also be assigned a specific switching device.
  • the object of the invention is a reliable device for monitoring specify a limited by relatively movable contact pieces separation distance of an electrical switching device.
  • a reliable simple monitoring device provides that the contact pieces are assigned a first and a second position monitoring device which operate independently of one another and a density sensor detects the density of an insulating medium located in the separation path, wherein a processing device of the first and the second position monitoring device and the density sensor determined quantities processed and from the processing means an enable signal can be generated.
  • the independently operating position monitoring devices give a great deal of security that the existing position of the contact pieces is displayed correctly. It is particularly advantageous if position monitoring devices are used, which operate on the one hand independently of each other and work on the other according to different principles. Thus, for example, a method based on an optical detection and another method based on a mechanical detection of the switching state.
  • a density sensor in particular a temperature-compensated density sensor can be used. Due to the temperature compensation, the density of the insulating medium can be monitored independently of external influences such as current heat effects or heat radiation.
  • the location of the arrangement of the density sensor can be chosen relatively freely, as set within the encapsulating a uniform distribution of the insulating medium.
  • the information output by the position monitoring devices or by the density sensor can be processed automatically and a release signal can be generated.
  • certain limit values are stored within the processing device, which are compared with the values supplied by the position monitoring devices or by the density sensor and an enable signal is generated only when certain minimum requirements are met.
  • the first position monitoring device is an optical sensor, in particular a camera, in whose detection range at least one movable contact piece is arranged.
  • optical sensor in particular by means of a camera, areas located far away from the touch can be monitored. This does not interfere with the insulation and the insulation resistance is not changed. Therefore, such position monitoring devices can be retrofitted to existing switching devices. For this purpose, only a suitable arrangement option for the optics is necessary.
  • a coding for identifying the switching device is arranged in the detection range of the optical sensor.
  • a coding such as a bar code, an alphanumeric code, a color code or the like.
  • This code can additional information, for example, which switching device it is, the location of the switching device, the time of the last maintenance, etc. are removed.
  • This coding makes it possible to unambiguously assign the information determined by the optical sensor to a specific switching device. As a result, the quantities to be determined during processing continue to be distinguishable. Confusions are avoided.
  • Figure shows a section through an electrical switching device with a drive device and monitoring devices.
  • the figure shows a section through an electrical switching device, which is arranged within a capsule housing 1.
  • the electrical switching device has an isolating distance 2, which is limited by relatively movable contact pieces.
  • the relatively movable contact pieces comprise a first movable contact piece 3 and a second non-stationary contact piece 4.
  • the movable contact piece 3 is displaceable by means of a drive device 5.
  • the drive device 5 is connected to the first movable contact piece 3 via a kinematic chain 6.
  • the kinematic chain 6 engages gas-tightly through the encapsulating housing 1.
  • a gas-tight implementation here offers a sealed rotatable shaft.
  • the kinematic chain 6 is shown only schematically.
  • the movement of kinematic Chain 6 is represented by an auxiliary contact 7.
  • the auxiliary contact 7 can be configured such that a continuous delivery of information about the movement of the drive means 5 or kinematic chain 6 or the movable contact piece 3 can be issued or that the auxiliary contacts 7 only work in the manner of Endlagenüberwachungs observed.
  • the auxiliary contact 7 thus represents a first position monitoring device for the position of the contact pieces 2, 3 to one another.
  • an optical sensor in the form of a camera 8 is integrated into the encapsulating housing 1.
  • the separation distance 2 is arranged so that a movement of the movable contact piece 3 and thus a monitoring of the position of the contact pieces 3 and 4 to each other is possible.
  • a coding 10 is arranged in the detection range of the camera 8.
  • the coding 10 in the present case is an alphanumeric coding and designates the electrical switching device.
  • the interior of the encapsulating housing 1 is monitored by a density sensor 9.
  • the interior of the encapsulating housing 1 is filled with an insulating gas under elevated pressure. The insulating gas spreads on all sides within the encapsulating housing 1 and also flows through the isolating section 2.
  • the information output of the auxiliary contact 7 acting as the first position monitoring device and the camera 8 and the density sensor 9 acting as the second position monitoring device are fed into a processing device 11. Prescribed limit values are stored in the processing device 11. Furthermore, a corresponding logical combination of the auxiliary contacts 7 of the camera 8 and the density sensor 9 is deposited. All information from the auxiliary contact 7 of the camera 8, the Density sensor 9 are linked by an AND operation, that is, only in the presence of a positive signal of the auxiliary contact 7, a presence of a positive signal from the camera 8 and a positive signal from the density sensor 9 is output from the processing means an enable signal 12 , The release signal 12 can for example be displayed accordingly or processed in other facilities.
  • positive information means both the auxiliary contact 7 and the camera image of the camera 8 signalize the presence of an opened separation point.
  • the density sensor 9 signals the presence of a minimum density of the insulating medium in the separation section 2. It can be provided that the monitoring of the separation section 2 takes place only in the end positions of the movable contact piece 3. However, it can also be provided that a continuous monitoring of the progress of a relative movement is monitored. Continuous monitoring offers the advantage that, for example, variable distances as well as variable minimum densities for different voltage levels can be stored in the processing device 11, so that the monitoring device and the monitoring method can be used universally in different voltage levels.
  • the processing device 11 is used for monitoring a plurality of contact pieces of a single or a plurality of different electrical switching devices.
  • the contact pieces can be arranged within a common encapsulating housing or in different encapsulating housings with different gas spaces.
  • monitoring devices such as position monitoring devices or density sensors can also be used multiple times. For example, a camera can monitor several contact pieces in their positions relative to one another.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Gas-Insulated Switchgears (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
EP05797275A 2004-11-02 2005-10-21 Überwachungsverfahren für eine durch relativ zueinander bewegbare kontaktstücke begrenzte trennstrecke eines elektrischen schaltgerätes sowie zugehörige vorrichtung zur ausführung des überwachungsverfahrens Not-in-force EP1807852B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004053612A DE102004053612A1 (de) 2004-11-02 2004-11-02 Überwachungsverfahren für eine durch relativ zueinander bewegbare Kontaktstücke begrenzte Trennstrecke eines elektrischen Schaltgerätes sowie zugehörige Vorrichtung zur Ausführung des Überwachungsverfahrens
PCT/EP2005/055441 WO2006048381A1 (de) 2004-11-02 2005-10-21 Überwachungsverfahren für eine durch relativ zueinander bewegbare kontaktstücke begrenzte trennstrecke eines elektrischen schaltgerätes sowie zugehörige vorrichtung zur ausführung des überwachungsverfahrens

Publications (2)

Publication Number Publication Date
EP1807852A1 EP1807852A1 (de) 2007-07-18
EP1807852B1 true EP1807852B1 (de) 2011-05-18

Family

ID=35821869

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05797275A Not-in-force EP1807852B1 (de) 2004-11-02 2005-10-21 Überwachungsverfahren für eine durch relativ zueinander bewegbare kontaktstücke begrenzte trennstrecke eines elektrischen schaltgerätes sowie zugehörige vorrichtung zur ausführung des überwachungsverfahrens

Country Status (5)

Country Link
EP (1) EP1807852B1 (ko)
KR (1) KR100887432B1 (ko)
CN (1) CN101053050B (ko)
DE (1) DE102004053612A1 (ko)
WO (1) WO2006048381A1 (ko)

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DE102007003169A1 (de) * 2007-01-22 2008-07-31 Siemens Ag Verfahren zum Erkennen der Schaltererstellung eines Trennschalters oder eines Erdungsschalters
CN103065854A (zh) * 2012-12-24 2013-04-24 沈阳昊诚电气股份有限公司 固体绝缘隔离开关
DE102014212132A1 (de) * 2014-06-25 2015-12-31 Te Connectivity Germany Gmbh Schaltanordnung
US11170956B2 (en) 2014-06-25 2021-11-09 Te Connectivity Germany Gmbh Switching arrangement
CN105300320A (zh) * 2015-12-04 2016-02-03 华北电力大学（保定） 一种基于双辅助标志物的断路器角位移特性检测方法
CN105489414A (zh) * 2016-01-07 2016-04-13 上海电力学院 基于视频测距的敞开式高压隔离开关位置监测显示方法
CN107976684B (zh) * 2016-10-25 2023-08-04 日立能源瑞士股份公司 用于监测电路断路器的系统和方法
CN106842009B (zh) * 2017-01-17 2017-11-07 国网山东省电力公司乳山市供电公司 一种真空断路器触头分断检测装置
EP3929604B1 (en) * 2020-06-25 2024-07-31 ABB Schweiz AG A contact measurement system and method for measuring a parameter of a contact of a switchgear

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Also Published As

Publication number Publication date
WO2006048381A1 (de) 2006-05-11
KR100887432B1 (ko) 2009-03-10
CN101053050A (zh) 2007-10-10
KR20070051942A (ko) 2007-05-18
EP1807852A1 (de) 2007-07-18
DE102004053612A1 (de) 2006-05-04
CN101053050B (zh) 2010-10-06

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