EP4343808A1 - Nichtelektrische vorrichtung zum ersetzen eines stromsensors in einer schaltkammer eines lasttrennschalters sowie lasttrennschalter mit einer solchen nicht-elektrischen vorrichtung - Google Patents

Nichtelektrische vorrichtung zum ersetzen eines stromsensors in einer schaltkammer eines lasttrennschalters sowie lasttrennschalter mit einer solchen nicht-elektrischen vorrichtung Download PDF

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Publication number
EP4343808A1
EP4343808A1 EP23198151.5A EP23198151A EP4343808A1 EP 4343808 A1 EP4343808 A1 EP 4343808A1 EP 23198151 A EP23198151 A EP 23198151A EP 4343808 A1 EP4343808 A1 EP 4343808A1
Authority
EP
European Patent Office
Prior art keywords
axis
electric device
housing
mechanical reinforcement
elements
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.)
Pending
Application number
EP23198151.5A
Other languages
English (en)
French (fr)
Inventor
David Loglisci
Frédéric Brasme
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.)
Schneider Electric Industries SAS
Original Assignee
Schneider Electric Industries SAS
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 Schneider Electric Industries SAS filed Critical Schneider Electric Industries SAS
Publication of EP4343808A1 publication Critical patent/EP4343808A1/de
Pending legal-status Critical Current

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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
    • H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
    • H01H33/72—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid having stationary parts for directing the flow of arc-extinguishing fluid, e.g. arc-extinguishing chamber
    • H01H33/73—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid having stationary parts for directing the flow of arc-extinguishing fluid, e.g. arc-extinguishing chamber wherein the break is in air at atmospheric pressure, e.g. in open air
    • 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
    • H01H71/02—Housings; Casings; Bases; Mountings
    • H01H71/0207—Mounting or assembling the different parts of the circuit breaker
    • H01H71/0228—Mounting or assembling the different parts of the circuit breaker having provisions for interchangeable or replaceable parts
    • 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
    • H01H9/08—Arrangements to facilitate replacement of a switch, e.g. cartridge housing
    • 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
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/34—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
    • H01H9/346—Details concerning the arc formation chamber
    • 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
    • H01H11/0006—Apparatus or processes specially adapted for the manufacture of electric switches for converting electric switches
    • 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
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H2009/305—Means for extinguishing or preventing arc between current-carrying parts including means for screening for arc gases as protection of mechanism against hot arc gases or for keeping arc gases in the arc chamber
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2225/00—Switch site location
    • H01H2225/006—Switch site location more then one pole
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2225/00—Switch site location
    • H01H2225/012—Switch site location normally closed

Definitions

  • the present invention relates to a non-electric device for replacing a current sensor in a switching chamber of a switch-disconnector. It also relates to a switch-disconnector comprising such a non-electric device.
  • a switch-disconnector is a switch which, in its open position, satisfies the insulation conditions of a disconnector.
  • the switch-disconnector combines in the same device a load breaking function, typical of a switch, and an isolation function, typical of a disconnector.
  • the insulator disconnector therefore makes it possible to guarantee the safety of operators having to work on an electrical circuit connected to the switch-disconnector as soon as the latter is open.
  • the switch-disconnector is controlled to open from outside the switch-disconnector, either manually or by an abnormal condition detection unit external to the switch-disconnector.
  • Such a current sensor is for example disclosed in FR 3 030 763 A1 and comprises a housing inside which electrical elements of the current sensor are housed, this housing comprising two half-housings made of plastic material, which are welded to each other and through which a passage extends for an electrical conductor.
  • this housing comprising two half-housings made of plastic material, which are welded to each other and through which a passage extends for an electrical conductor.
  • such a current sensor is useless but cannot be removed as is because this would modify the geometric characteristics of the interrupting chamber, with the risk of altering the insulation performance, in particular the capacity of the breaking chamber to allow the extinction of the electric arc forming when the switch-disconnector is opened.
  • the switch-disconnector comprises a housing, typically made of plastic, which is generally identical to that of the current sensor to be replaced but which is internally devoid of any electrical component in favor of an attached insert.
  • This insert is made of a molded and bonded resin, and allows the box to remain intact when the switch-disconnector opens, by absorbing the excess pressure applied to the box that the electric arc creates in the switching chamber.
  • this “false sensor” with resin insert is generally effective in preserving the insulation performance of the switch-disconnector version of a given device, compared to the circuit breaker version of this device, it does not give complete satisfaction, particularly from an environmental and normative point of view.
  • the aim of the present invention is to propose a new “false sensor”, which is particularly robust and whose behavior is reliable and controlled.
  • the subject of the invention is a non-electric device for replacing a current sensor in a switching chamber of a switch-disconnector, this non-electric device being as defined in claim 1.
  • the invention provides that the plastic housing of the non-electric device is made up of two half-housings fixedly assembled to one another and that mechanical reinforcing elements are molded with a first of the two halfs. -boxes and form a contact support for the second half-box, these mechanical reinforcement elements extending in the internal volume of the box substantially parallel to the axis along which the box is crossed by a passage for an electrical conductor on which the non-electric device is mounted in service, in particular within a switch-disconnector.
  • the mechanical reinforcement elements make it possible to maintain the integrity of the housing and, thereby, of the non-electric device conforming to the invention when the latter undergo in a switching chamber of a switch-disconnector the overpressure created by the formation of an electric arc when the switch-disconnector opens.
  • the mechanical reinforcement elements are integrated by molding into the first half-case, their structural specificities can be defined precisely and repeatably and their behavior is controlled.
  • the inventors were able to validate and optimize by digital simulation characteristics, in particular shape and placement, relating to the mechanical reinforcement elements.
  • the choice, between the two half-cases, of the first half-case integrating the mechanical reinforcement elements is advantageously made in connection with rheological considerations of moldability.
  • the non-electric device according to the invention can advantageously be limited to the two half-housings, in particular without any filling added to its volume. internal.
  • the effects and interests of the mechanical reinforcement elements can be reinforced by providing that at least some of these mechanical reinforcement elements are advantageously distributed into one or more groups, which are each preferably made up of at least three mechanical reinforcement elements and in each of which the mechanical reinforcement elements are aligned, advantageously occupying a region of the internal volume, offset from the passage for the electrical conductor.
  • the non-electric device according to the invention can provide other arrangements aimed at strengthening its performance.
  • the invention also relates to a switch-disconnector, as defined in claim 11.
  • the switch-disconnector 1 is typically a high-power switch-disconnector, in particular high intensity in the sense that, in the normally closed state of the switch-disconnector 1, the latter authorizes the circulation through it of a permanent current, direct current or alternating current, the intensity of which is between a few hundred and a few thousand amperes, in particular between 500A and 7500A.
  • the switch-disconnector 1 is here multipolar, being intended to be used in an electrical circuit comprising several electrical poles.
  • the switch-disconnector 1 has four independent poles P1, P2, P3 and P4.
  • the switch-disconnector 1 has a different number of poles, for example two or three.
  • the switch-disconnector 1 has only one pole.
  • the switch-disconnector 1 includes an insulating casing 2, which supports the poles P1 to P4.
  • the envelope 2 is for example made of a plastic material and comprises several parts fixedly assembled to each other. Envelope 2 delimits an internal volume, which is essentially closed and which, here, is distributed into four separate compartments, respectively associated with poles P1 to P4.
  • poles P1 to P4 being identical to the other poles, only one of them is described below in detail, namely the pole P2 which is shown in section on the Figure 3 .
  • the description given for pole P2 applies to each of the other poles P1, P3 and P4.
  • the pole P2 comprises two terminal pads 10 and 11 which make it possible to connect the pole P2 to an electrical circuit which it is desired to allow isolation by the switch-disconnector 1.
  • the terminal pads 10 and 11, which are made of an electrically conductor, generally a metal such as copper, are carried by the envelope 2 so as to be electrically connectable from outside the envelope 2 to the aforementioned electrical circuit.
  • the terminal pads 10 and 11 pass through a dedicated wall of the envelope 2, emerging, on either side of this dedicated wall, outside the envelope 2 and inside the envelope 2, in other words in the internal volume of the latter, more precisely inside the compartment of this internal volume, associated with the pole P2.
  • the pole P2 also comprises two contact elements 20 and 21 which are respectively connected to the terminal pads 10 and 11 while being movable relative to each other between a closed position, which is not shown, and a position open, which is shown on the Figure 3 .
  • the contact elements 20 and 21 are in direct contact with each other and allow the circulation of an electric current between the terminal pads 10 and 11.
  • the contact elements 20 and 21 are spaced apart from each other and interrupt the electrical circulation between the terminal pads 10 and 11.
  • the contact element 20 is fixedly carried by a movable arm 23 which is electrically connected to the terminal pad 10, while the contact element 21 is fixedly carried by the terminal pad 11 and is itself fixedly carried by the envelope 2.
  • the contact elements 20 and 21 are arranged in a switching chamber 24 associated with pole P2.
  • the cutting chamber 24 is delimited inside the envelope 2, thus forming a part of the internal volume of the latter, more precisely a part of the compartment of this internal volume, associated with the pole P2.
  • the cutting chamber 24 is filled with air and surrounds the contact elements 20 and 21 so as to promote the extinction of the electric arc forming between the contact elements 20 and 21 when the latter pass from their closed position to their open position.
  • the electric arc ionizes the air present in the cutting chamber 24, which generates gases, called cutting gases, which are partially ionized and which contain suspended particles, such as soot. and/or metal particles.
  • the formation of this electric arc creates an overpressure in the breaking chamber 24 generating mechanical forces both on the parts of the envelope 2, which delimit the breaking chamber 24, and on the components of the switch-disconnector 1 , which are arranged in the cutting chamber 24.
  • the pole P2 also includes a mechanism 30 making it possible to open the switch-disconnector 1, that is to say to move the contact elements 20 and 21 from the closed position to the open position.
  • the mechanism 30 is arranged inside the envelope 2, more precisely in the compartment of the internal volume of the latter, associated with the pole P2.
  • the mechanism 30 is known per se in the field and will therefore not be described further here. In other words, the specifics of the mechanism 30 are not limiting.
  • the mechanism 30 is designed to set in motion the movable arm 23 in order to pass the contact elements 20 and 21 between their closed and open positions.
  • the mechanism 30 is advantageously designed to, when actuated to move the contact elements 20 and 21 from their closed position to their open position, cause the opening of the contact elements of the other poles P1, P3 and P4 of the switch-disconnector 1, in particular via mechanisms, similar to the mechanism 30 of pole P2, which belong respectively to poles P1, P3 and P4.
  • the mechanism 30 is actuated from outside the envelope 2, in particular either manually or by an ad hoc control unit which is not integrated into the switch-disconnector 1.
  • the switching chamber 24 does not have to contain a current sensor which, mounted on one of the terminal pads 10 and 11, would measure the electric current circulating there to provide information on a potential operating anomaly, such as an overcurrent, a short circuit or a power surge.
  • the pole P2 also includes a non-electric device 40, which is visible at the Figure 3 and which is represented alone on the figures 4 to 9 .
  • This non-electric device 40 makes it possible to replace the current sensor mentioned just above, by substantially occupying the space that this current sensor would have occupied within the switch-disconnector 1, for the reasons explained in detail in the introductory part of this document.
  • the non-electric device 40 constitutes a “false sensor” in the sense defined above.
  • the non-electric device 40 is arranged inside the envelope 2, more precisely in the compartment of the internal volume of the latter, associated with the pole P2, being arranged in the cutting chamber 24.
  • the non-electric device 40 comprises a housing made up of two half-housings 41 and 42.
  • the half-housing 41 is shown alone on the figure 8 and the half-housing 42 is shown alone on the Figure 9 .
  • the two half-housings 41 and 42 are made of a molded plastic material.
  • the non-electric device 40 advantageously consists of half-housings 41 and 42, that is to say that the non-electric device 40 does not comprise any other component than the two halves -boxes 41 and 42.
  • the half-housings 41 and 42 are fixedly assembled to one another.
  • the embodiment of the fixed assembly connection between the two half-housings 41 and 42 is not limiting, it being noted that this aspect will be discussed in more detail later.
  • the half-housings 41 and 42 are crossed by a passage 43 along an axis X43 on which the passage 43 is centered.
  • the half-housings 41 and 42 thus follow one another along the axis X43.
  • the terminal pad 10 is received, here in a complementary manner, in the passage 43, extending parallel to the axis X43, or even, as here, being aligned with the X43 axis.
  • the housing made up of half-housings 41 and 42 is thus crossed, via passage 43, by the terminal pad 10 and is arranged in the cutting chamber 24 so that the half-housing 41 is, along the axis X43, turned and placed against a part of the envelope 2, which is also crossed by the terminal pad along the axis along the axis X43, directly between the envelope 2 and the half-housing 42.
  • the half-housings 41 and 42 delimit between them an internal volume V40 which is separated from the passage 43, surrounding the latter all around the axis X43.
  • the volume internal V40 is not distributed homogeneously all around the passage 43, for reasons linked to the substitute “false sensor” function provided by the non-electric device 40.
  • the internal volume V40 is thus made up of two contiguous sub-volumes, namely an annular sub-volume V40.1, which directly surrounds the passage 43, and an offset sub-volume V40.2, which is further away from the axis X43 than the annular sub-volume V40.1.
  • the annular sub-volume V40.1 runs all around the axis X43 while the offset sub-volume V40.2 only runs partially around the axis X43.
  • each of the two half-housings 41 and 42 includes a bottom wall 41.1, respectively 42.1, which extends generally transversely, or even perpendicularly, to the axis X43 and which is crossed from one side to the other by the passage 43.
  • the bottom walls 41.1 and 42.1 are arranged facing each other along the axis X43 and each separate the internal volume V40 from the exterior of the non- electric 40.
  • the half-housing 41 also includes a peripheral side wall 41.2 and a central side wall 41.3, which each extend from the bottom wall 41.1 substantially parallel to the axis X43 towards the half-housing 42, the peripheral side wall 41.2 being further from the axis X43 than the central side wall 41.3.
  • the peripheral side wall 41.2 follows the peripheral contour of the bottom wall 41.1 while the central side wall 41.3 follows the contour of the passage 43 through the bottom wall 41.1.
  • the half-housing 42 includes a peripheral side wall 42.2 and a central side wall 42.3, which each extend from the bottom wall 42.1 substantially parallel to X43 towards the half-housing 41, the peripheral side wall 42.2 being further from the axis X43 than the central side wall 42.3.
  • the peripheral side wall 42.2 follows the peripheral contour of the bottom wall 42.1 while the central side wall 42.3 follows the contour of the passage 43 through the bottom wall 42.1.
  • the peripheral side walls 41.2 and 42.2 separate the internal volume V40 from the exterior of the non-electric device 40, while the central side walls 41.3 and 42.3 separate the passage 43 from the volume internal V40.
  • the annular sub-volume V40.1 is delimited by, at the same time, the entirety of the central side walls 41.3 and 42.3, part of the bottom walls 41.1 and 42.1, and part of the peripheral side walls 41.2 and 42.2, while the offset sub-volume V40.2 is delimited by both the rest of the bottom walls 41.1 and 42.1, and the rest of the peripheral side walls 41.2 and 42.2.
  • the non-electric device 40 integrates arrangements aimed at reinforcing its integrity so that it resists without damage the excess pressure created by the formation of an electric arc in the cutting chamber 24 when opening the contact elements 20 and 21.
  • the half-housing 41 integrates by molding mechanical reinforcement elements 44 which each extend substantially parallel to the axis X43 in the internal volume V40 until it is in contact with the half-housing 42 so as to support the latter by contact.
  • the internal volume V40 is, apart from the mechanical reinforcement elements 44, left substantially empty, in particular being free of any resin added or, more generally, of any material of reported filling.
  • the mechanical reinforcement elements 44 are thus integral with the rest of the half-housing 41.
  • each of the mechanical reinforcement elements 44 thus extends projecting along the axis X43 from the wall bottom 41.1, and this from one end 44.1 of the mechanical reinforcement element 44, at the level of the junction of the latter with the bottom wall 41.1, to a free end 44.2 of the mechanical reinforcement element 44, which is axially opposite its end 44.1.
  • the respective free ends 44.2 of the mechanical reinforcement elements 44 are in contact along the axis X43 with the bottom wall 42.1 of the half-housing 42, thus supporting this wall by contact background 42.1.
  • each mechanical reinforcement element integrates by molding ribs 44.3 which each extend from the bottom wall 41.1 over the entire axial extent of the mechanical reinforcement element 44, in other words which each extend from the end 44.1 to the end 44.2 of the mechanical reinforcement element 44.
  • these ribs 44.3 are provided in four copies for each of the mechanical reinforcement elements 44.
  • the ribs 44.3 of each mechanical reinforcement element 44 are advantageously distributed on the mechanical reinforcement element 44 around the axial direction in which this mechanical reinforcement element 44 extends between its ends 44.1 and 44.2.
  • the mechanical reinforcement elements 44 are distributed in one or more groups, here two groups G1 and G2, in each of which all the mechanical reinforcement elements 44 are aligned according to a direction transverse to axis X43, in particular orthogonal to this axis X43.
  • all the mechanical reinforcement elements 44 of group G1 and all the mechanical reinforcement elements 44 of group G2 are advantageously arranged in the offset sub-volume V40.2. In this way, the mechanical reinforcement elements 44 of groups G1 and G2 act effectively in a region of the internal volume V40, where the mechanical stresses applied by the aforementioned excess pressure on the non-electric device 40 are the strongest.
  • the groups G1 and G2 are each made up of at least three mechanical reinforcement elements 44, here respectively five and six mechanical reinforcement elements 44, which are distributed in a substantially regular manner along the direction of alignment reinforcing elements 44 within each group G1, G2.
  • the mechanical reinforcement elements 44 of each of the groups G1 and G2 are made integrally directly with each other, in particular by joining two by two of one of their ribs 44.3.
  • one of the mechanical reinforcement elements 44 belongs neither to group G1 nor to group G2.
  • This mechanical reinforcement element 44 is here arranged in the annular sub-volume V40.1. In a variant not shown, this mechanical reinforcement element 44 is omitted, which amounts to saying that all the mechanical reinforcement elements 44 then belong to one or the other of groups G1 and G2.
  • the molded design of the half-housings 41 and 42 is advantageously taken advantage of with regard to the fixed assembly connection between these half-housings. More precisely, as in the embodiment illustrated in the figures, the half-housing 41 integrates by molding protruding elements 45, which are arranged outside the internal volume V40 and which are in particular integrated into the peripheral side wall 41.2. These protruding elements 45 are designed to, when assembling the half-housings 41 and 42, snap into respective hollow reliefs 46, which are complementary to the protruding elements 45 and which are provided outside the internal volume V40 by the half-housing 42, in particular by its peripheral side wall 42.2.

Landscapes

  • Switch Cases, Indication, And Locking (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
EP23198151.5A 2022-09-20 2023-09-19 Nichtelektrische vorrichtung zum ersetzen eines stromsensors in einer schaltkammer eines lasttrennschalters sowie lasttrennschalter mit einer solchen nicht-elektrischen vorrichtung Pending EP4343808A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR2209492A FR3139956B1 (fr) 2022-09-20 2022-09-20 Dispositif non-électrique pour la substitution d’un capteur de courant dans une chambre de coupure d’un interrupteur-sectionneur, ainsi qu’interrupteur-sectionneur comportant un tel dispositif non-électrique

Publications (1)

Publication Number Publication Date
EP4343808A1 true EP4343808A1 (de) 2024-03-27

Family

ID=83899949

Family Applications (1)

Application Number Title Priority Date Filing Date
EP23198151.5A Pending EP4343808A1 (de) 2022-09-20 2023-09-19 Nichtelektrische vorrichtung zum ersetzen eines stromsensors in einer schaltkammer eines lasttrennschalters sowie lasttrennschalter mit einer solchen nicht-elektrischen vorrichtung

Country Status (6)

Country Link
US (1) US20240096575A1 (de)
EP (1) EP4343808A1 (de)
CN (1) CN117747339A (de)
CA (1) CA3213477A1 (de)
FR (1) FR3139956B1 (de)
MX (1) MX2023011010A (de)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3030763A1 (fr) 2014-12-23 2016-06-24 Schneider Electric Ind Sas Dispositif comprenant des elements de mesure de courant et procede de fabrication d'un tel dispositif
DE102017127888A1 (de) * 2017-11-24 2019-05-29 Eaton Electrical Ip Gmbh & Co. Kg Messeinrichtung zur Verwendung in einem elektrischen Schaltgerät

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3030763A1 (fr) 2014-12-23 2016-06-24 Schneider Electric Ind Sas Dispositif comprenant des elements de mesure de courant et procede de fabrication d'un tel dispositif
DE102017127888A1 (de) * 2017-11-24 2019-05-29 Eaton Electrical Ip Gmbh & Co. Kg Messeinrichtung zur Verwendung in einem elektrischen Schaltgerät

Also Published As

Publication number Publication date
FR3139956A1 (fr) 2024-03-22
CN117747339A (zh) 2024-03-22
FR3139956B1 (fr) 2024-09-27
US20240096575A1 (en) 2024-03-21
CA3213477A1 (en) 2024-03-20
MX2023011010A (es) 2024-03-21

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Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC ME MK MT NL NO PL PT RO RS SE SI SK SM TR