EP1772882A1 - Interrupteur à gaz comprimé équipé d'un pilotage du champ électrique - Google Patents

Interrupteur à gaz comprimé équipé d'un pilotage du champ électrique Download PDF

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Publication number
EP1772882A1
EP1772882A1 EP05405576A EP05405576A EP1772882A1 EP 1772882 A1 EP1772882 A1 EP 1772882A1 EP 05405576 A EP05405576 A EP 05405576A EP 05405576 A EP05405576 A EP 05405576A EP 1772882 A1 EP1772882 A1 EP 1772882A1
Authority
EP
European Patent Office
Prior art keywords
switch
nozzle
insulating material
field element
recess
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.)
Granted
Application number
EP05405576A
Other languages
German (de)
English (en)
Other versions
EP1772882B1 (fr
Inventor
Martin Seeger
Lutz Niemeyer
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.)
ABB Research Ltd Switzerland
ABB Research Ltd Sweden
Original Assignee
ABB Research Ltd Switzerland
ABB Research Ltd Sweden
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
Priority to ES02405576T priority Critical patent/ES2351844T3/es
Application filed by ABB Research Ltd Switzerland, ABB Research Ltd Sweden filed Critical ABB Research Ltd Switzerland
Priority to DE502005006085T priority patent/DE502005006085D1/de
Priority to EP05405576A priority patent/EP1772882B1/fr
Priority to AT05405576T priority patent/ATE415695T1/de
Publication of EP1772882A1 publication Critical patent/EP1772882A1/fr
Application granted granted Critical
Publication of EP1772882B1 publication Critical patent/EP1772882B1/fr
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
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H01H33/24—Means for preventing discharge to non-current-carrying parts, e.g. using corona ring
    • H01H33/245—Means for preventing discharge to non-current-carrying parts, e.g. using corona ring using movable field electrodes
    • 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
    • H01H33/7015—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid characterised by flow directing elements associated with contacts
    • H01H33/7023—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid characterised by flow directing elements associated with contacts characterised by an insulating tubular gas flow enhancing nozzle
    • 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
    • H01H33/7015—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid characterised by flow directing elements associated with contacts
    • H01H33/7069—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid characterised by flow directing elements associated with contacts characterised by special dielectric or insulating properties or by special electric or magnetic field control properties

Definitions

  • the embodiments of the invention described here generally relate to a compressed gas switch, in particular for high or medium voltage.
  • DE 30 44 836 describes a compressed gas switch with two relatively movable contact pieces and with an insulating nozzle. If the two switching pieces separated from each other, a switching arc, which is to be extinguished as quickly as possible, to avoid undesirable high burnup of the switching pieces. In such a switch, the arc carries material from the insulating walls, thereby increasing the pressure so that heated gas drains into a compression chamber and can later be used as quenching gas.
  • the insulating nozzle allows the quenching gas to flow from the compression chamber into an expansion space to cool and thereby quench the switching arc.
  • the insulating nozzle has a ring-shaped insert embedded in a constriction (eg of conductive materials, in particular graphite or Teflon filled with conductive material, or of materials with a dielectric constant greater than 5), which is arranged electrically insulated from the two contact pieces. and with respect to the first contact piece has a first and compared to the second contact piece has a second capacitance.
  • the order and the dimensioning of the insert are chosen so that an electric field built up in the region of the constriction from the nozzle surface into the compression space and into the expansion space when a voltage is applied between the contact pieces is displaced.
  • EP 1 544 881 A1 also describes a compressed gas switch, in which an effect on the electric field is sought.
  • the compressed gas switch described therein has an insulation nozzle with a conductive part and an electrically insulating part, which surrounds the conductive part at least partially. On an inner surface of the insulating nozzle, the insulating member does not cover the conductive member. As a result, a more uniform distribution of the electric field is sought.
  • the switch includes a first arcing contact and a second arcing contact, wherein when the switch is turned on, the first arcing contact is with a contact region of the second arcing contact is in contact and movable to interrupt the switch of at least one of the arc contacts along an axis of the switch, and an insulating nozzle which extends in the axial direction and the arc contacts and / or an arc extinguishing zone between the arc contacts surrounds and a nozzle line for blowing one when switching Furthermore, the insulating material nozzle in the region of the nozzle throat has a part which has at least one recess on its outer side facing away from the arc extinguishing zone, in which a field element is arranged, which serves to control an electric field between the arcing contacts.
  • the Isolierstoffdüse thus has on its outer side a recess or more recesses in which at least one field element is present, which serves during switching off to a control of the electric field between the arcing contacts. After the field element is introduced into the depression, the field element is not covered. As a result, problems in the conventional embedding of the field element in the insulating material nozzle are avoided and the manufacturability of the field-controlling insulating nozzle duetlich simplified and cheaper.
  • the at least one depression on the outside of the part extends annularly around the part of the insulating material nozzle.
  • the field element is present as a coating on a surface of the depression.
  • Various parameters such as the thickness of the layer or of the field element and the depth and width of the depression can be determined for a desired field control.
  • the field element is an annular body that extends along the recess.
  • the position and the size of the field element can for the desired Field control.
  • the annular body should be installable from the outside in the recess and consist of a conductive and / or dielectric material.
  • the nozzle may have more than one recess, wherein preferably each recess contains a field element.
  • the combination of recess and field element may be present on one or both nozzles.
  • the field element In the off state of the switch, the field element is also between the arcing contacts.
  • the field element may be a solid or hollow body.
  • a hollow body as a field element may have a closed or a non-closed contour.
  • the field element may also have a non-conductive (insulating) core that is completely or partially surrounded by a conductive layer.
  • the field element contains a material having a dielectric constant ⁇ >> 1, preferably ⁇ > 5 and in particular a ferroelectric.
  • Figure 1 shows a first embodiment of the gas pressure switch 1 in the off (i.e., non-conductive) state.
  • the switch 1 has a first or outer arcing contact 2, typically an arcing contact tulip 2 extending annularly about the axis A, and a second or inner arcing contact 3, typically an arcing contact pin 3, which is generally rod-shaped or tubular.
  • the outer contact 2 annularly surrounds the inner contact 3.
  • the two arcing contacts 2, 3 are relative to each other in the axial direction by a mechanical drive not shown displaced.
  • the outer contact 2 is stationary, while the inner contact 3 is movable, for example, to the left.
  • a two-part switch body 4a, 4b arranged for the so-called rated current contacts 4a, 4b, the low-resistance contacts for provide the rated current with the switch closed.
  • the rated current contacts 4a, 4b essentially encompass the arcing contacts 2, 3, as can be seen from FIG. If the rated current contacts 4a, 4b are disconnected, the current commutates to the arcing contacts 2, 3. Subsequently, the arcing contacts 2, 3 are disconnected. This creates a current-carrying arc, which is extinguished by means of compressed gas.
  • the compressed gas is provided in a self-blow circuit breaker by the so-called Disblas bin, ie by self-heating in a heating volume and assisted by evaporating insulating material material, and in a buffer circuit breaker by a piston.
  • the pressurized gas is then directed from the insulating nozzle 5, 9 to the burning arc to achieve efficient blowing and arc quenching.
  • the insulating nozzle 5 of the switch 1 is typically attached to the switch body 4b.
  • the insulating material nozzle 5 is made, for example, of plastic, in particular PTFE, and has a tubular part 5a and a mouth part 5b.
  • the parts 5a, 5b often have substantially equal outer diameters but different inner diameters. As can be seen from FIG. 1, the inner diameter of the mouth part 5b decreases starting from the inner diameter of the part 5a to a minimum at a point M, in order to increase again in the direction of the arc contact pin 3 from this point M.
  • the tubular part 5a surrounds the arc contact tulip 2 annularly.
  • the mouth portion 5b projects beyond the contact tulip 2 so far that it penetrates in the on state in the switch body 4a and the Nennstromnapspe and the arc contact pin 3 surrounds annular.
  • the mouth part 5 b forms a constriction 6 in the region of the point M for a gas flowing out of an extinguishing chamber for extinguishing an arc between the contacts 2, 3.
  • the insulating material nozzle 5 has an outer surface in the region of the mouth part 5b, that is to say, the surface of the nozzle 5b. H. on an outer side facing away from the arc extinguishing zone, an annular recess 7.
  • a field element 8 is arranged, which serves for field control.
  • the field element 8 is applied by way of example as a layer on a surface of the recess 7.
  • the field element 8 can be made of a conductive material or of a material with a high dielectric constant ( ⁇ >> 1, preferably ⁇ > 5).
  • the thickness of the layer can be selected depending on the material and the field influence to be achieved.
  • the thickness may be, for example, about 3 mm.
  • the depth and width (width) of the recess 7, and thus its surface can be selected according to a field control to be achieved in the region of the insulating material nozzle 5, 9.
  • the field element 8 essentially covers the entire surface of the depression 7. The thickness and the surface are thus available as parameters in order to control the field influence to be achieved via the field element 8.
  • FIGS. 2-5 show various embodiments of the insulating material nozzle 5, wherein the insulating material nozzle 5 is shown together with the arc contacts 2, 3. To simplify the illustration, the nominal stator contacts 4a, 4b of the switch 1 are omitted.
  • the mouth part 5b of the insulating material nozzle 5 has at least one depression 7, the position, width and depth of which varies depending on the exemplary embodiment or the requirements of the field control.
  • an axial position of the recess 7 is selected near a transition between the tubular part 5a and the mouth part 5b.
  • the field element 8 is in the Recess 7 introduced and extends along the recess 7 in the circumferential direction around the mouth portion 5b.
  • the field element 8 generates a strong field control.
  • the field is moved to the right, ie in the direction of the second arcing contact 3.
  • the first arcing contact 2 and the area between the first arcing contact 2 and the rated current contact or switch body 4b is relieved.
  • the recess 7 is displaced in the axial direction of the arcing contact pin 3 and thus relatively far from the transition between the tubular part 5a and the mouth portion 5b of the insulating material 5 is arranged.
  • the recess 7 is further, d. H. wider in the axial direction, and deeper, d. H. embedded in the radial direction deeper into the insulating material 5, as in the embodiment of Figure 2.
  • the field element 8 is inserted into the recess 7, z. B. einmontiert or clamped, but not covered from the outside and in particular not embedded in the insulating material 5.
  • the recess 7 is again located close to the transition between the tubular part 5a and the mouth part 5b.
  • the recess 7 is deeper in the radial direction than that shown in FIG.
  • the field element 8 here displaces the field in the region of the arc extinguishing zone to the right and left. This is again advantageous for the Arc contact pin 3 when passing through said area.
  • the mouth portion 5b has two recesses 7a, 7b.
  • the depression 7a is arranged axially closer to the arc contact tulip 2 and thus close to the transition between the tubular part 5a and the mouth part 5b.
  • the depression 7a is approximately the same depth as that shown in FIG.
  • the recess 7b is located axially closer to the arcing contact pin 3, and thus relatively far from the junction, and has approximately the same parameters as that shown in FIG.
  • the field control is here performed as a combination of the control mechanisms shown in Figs. In the area of the arc extinguishing zone in the insulating nozzle, the field is pushed out.
  • three or more depressions 7, 7 a, 7 b may be present and equipped with field control elements 8.
  • the field element 8 is inserted into the recess 7, 7a, 7b provided for this purpose, without the recess 7, 7a, 7b being closed. In terms of manufacturing technology, this is less expensive than the embedding of a field element in the material of the insulating material 5 known from the prior art.
  • the switch 1 additionally has an auxiliary nozzle 9, which extends substantially between the insulating material 5 and the first arcing contact 2 (arcing contact tulip 2).
  • the auxiliary nozzle 9 is for example made of plastic, in particular of PTFE, and also has a tubular part 9a and a mouth part 9b.
  • the tubular part 9a surrounds the first arcing contact 2 annularly, and the mouth part 9b projects beyond the first arcing contact 2 in the direction of the second arcing contact 3.
  • the recess 7 and the field element 8 are present in the auxiliary nozzle 9.
  • the recess 7 and the field element 8 can be positioned similarly, as described above with reference to Figures 1-5.
  • the depression 7 and the field element 8 accordingly assume the same function in the auxiliary nozzle 9 as in the insulation nozzle 5.
  • the auxiliary nozzle 9 configured in this way assumes the desired field control, so that the insulation nozzle 5 contains no recess 7 and no field element 8.
  • both the auxiliary nozzle 9 and the main nozzle 5, which together form the insulating material nozzle 5, be equipped with the field control elements 8 for field control.
  • the field element 8 may be a solid or hollow body.
  • a hollow body as a field element 8 may have a closed or a non-closed contour. When the contour is not closed, the field element 8 has a concave area on the surface.
  • the field element 8 may also have a non-conductive (insulating) core that is completely or partially surrounded by a conductive layer.
  • various parameters of the field element 8 in particular the axial position, axial extension, radial depth or depression, size, shape, mass, dielectric contacts ⁇ or conductivity, can thus be freely selected.
  • the electric field distribution between the contacts 2, 3, 4 a, 4 b and in particular in the region of the arc extinguishing zone when the arc is extinguished can be influenced in a targeted and effective manner.
  • the insulating nozzle 5, 9 according to the invention can be installed, for example, in a circuit breaker, such as a high-voltage switch or high-current switch, or in a disconnector with arcing contacts.

Landscapes

  • Circuit Breakers (AREA)
  • Supply And Distribution Of Alternating Current (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
EP05405576A 2005-10-10 2005-10-10 Interrupteur à gaz comprimé équipé d'un pilotage du champ électrique Not-in-force EP1772882B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
ES02405576T ES2351844T3 (es) 2005-10-10 2002-07-08 Estimación de parametros para redes eléctricas.
DE502005006085T DE502005006085D1 (de) 2005-10-10 2005-10-10 Druckgasschalter mit Einrichtung zur elektrischen Feldsteuerung
EP05405576A EP1772882B1 (fr) 2005-10-10 2005-10-10 Interrupteur à gaz comprimé équipé d'un pilotage du champ électrique
AT05405576T ATE415695T1 (de) 2005-10-10 2005-10-10 Druckgasschalter mit einrichtung zur elektrischen feldsteuerung

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP05405576A EP1772882B1 (fr) 2005-10-10 2005-10-10 Interrupteur à gaz comprimé équipé d'un pilotage du champ électrique

Publications (2)

Publication Number Publication Date
EP1772882A1 true EP1772882A1 (fr) 2007-04-11
EP1772882B1 EP1772882B1 (fr) 2008-11-26

Family

ID=35759309

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05405576A Not-in-force EP1772882B1 (fr) 2005-10-10 2005-10-10 Interrupteur à gaz comprimé équipé d'un pilotage du champ électrique

Country Status (4)

Country Link
EP (1) EP1772882B1 (fr)
AT (1) ATE415695T1 (fr)
DE (1) DE502005006085D1 (fr)
ES (1) ES2351844T3 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2362407A1 (fr) 2010-02-23 2011-08-31 ABB Research Ltd. Düse für einen Leistungsschalter und Leistungsschalter mit einer solchen Düse
WO2015158544A1 (fr) 2014-04-15 2015-10-22 Abb Technology Ag Dispositif interrupteur haute tension à buse auxiliaire

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE880338C (de) * 1951-04-12 1953-06-22 Licentia Gmbh Elektrischer Schalter mit Lichtbogenloeschung durch ein stroemendes Druckmittel, wieDruckgas
US3824360A (en) * 1971-08-06 1974-07-16 Siemens Ag Compressed gas electrical circuit breaker

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE880338C (de) * 1951-04-12 1953-06-22 Licentia Gmbh Elektrischer Schalter mit Lichtbogenloeschung durch ein stroemendes Druckmittel, wieDruckgas
US3824360A (en) * 1971-08-06 1974-07-16 Siemens Ag Compressed gas electrical circuit breaker

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2362407A1 (fr) 2010-02-23 2011-08-31 ABB Research Ltd. Düse für einen Leistungsschalter und Leistungsschalter mit einer solchen Düse
WO2015158544A1 (fr) 2014-04-15 2015-10-22 Abb Technology Ag Dispositif interrupteur haute tension à buse auxiliaire

Also Published As

Publication number Publication date
ES2351844T3 (es) 2011-02-11
DE502005006085D1 (de) 2009-01-08
EP1772882B1 (fr) 2008-11-26
ATE415695T1 (de) 2008-12-15

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