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EP3871244A1 - Interrupteur de mise à la terre pour un dispositif de commutation de moyenne et/ou haute tension et dispositif de commutation correspondant - Google Patents

Interrupteur de mise à la terre pour un dispositif de commutation de moyenne et/ou haute tension et dispositif de commutation correspondant

Info

Publication number
EP3871244A1
EP3871244A1 EP19820994.2A EP19820994A EP3871244A1 EP 3871244 A1 EP3871244 A1 EP 3871244A1 EP 19820994 A EP19820994 A EP 19820994A EP 3871244 A1 EP3871244 A1 EP 3871244A1
Authority
EP
European Patent Office
Prior art keywords
contact
earthing switch
auxiliary
main
circuit device
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
EP19820994.2A
Other languages
German (de)
English (en)
Inventor
Mariusz ROHMANN
Dirk SCHRÄDER
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 Energy Global GmbH and Co KG
Original Assignee
Siemens Energy Global GmbH and Co KG
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 Energy Global GmbH and Co KG filed Critical Siemens Energy Global GmbH and Co KG
Publication of EP3871244A1 publication Critical patent/EP3871244A1/fr
Pending legal-status Critical Current

Links

Classifications

    • 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
    • H01H31/003—Earthing switches
    • 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
    • H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
    • H01H33/12—Auxiliary contacts on to which the arc is transferred from the main contacts
    • 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
    • H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
    • H01H33/12—Auxiliary contacts on to which the arc is transferred from the main contacts
    • H01H33/121—Load break switches
    • H01H33/123—Load break switches in which the auxiliary contact pivots on the main contact-arm and performs a delayed and accelerated movement
    • H01H33/124—Load break switches in which the auxiliary contact pivots on the main contact-arm and performs a delayed and accelerated movement the auxiliary contact being a whip contact
    • 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
    • H01H31/28—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 angularly-movable contact

Definitions

  • the invention relates to an earthing switch for a medium and / or high-voltage circuit device, wherein the earthing switch for earthing a contact element of the circuit device has a movable switching element and a contact arrangement arranged at the free end of the switching element, which has a main contact and an auxiliary contact for electrical contact of the contact element, wherein the switching element between a first position in which the main or auxiliary contact electrically contact the contact element and a second position in which both the main contact and the auxiliary contact electrically contact the contact element, and wherein the contact element is one Has structure for the electrical contact to the auxiliary contact.
  • the invention further relates to a corresponding switching device with such an earthing switch.
  • a switching arc When switching on and off the coupled currents with earthing switches, depending on the voltage level and especially when switching off - caused by the continuously flowing currents - a switching arc occurs.
  • a switching arc can extend over the entire disconnection path of the earthing switch, or can only thermally extinguish after the earthing circuit arrangement has come to a standstill in the “off” position.
  • the document DE 199 49 493 A1 shows an earthing switch for a medium-voltage circuit device, the earthing switch for earthing a contact piece of the circuit device having a movable switching element and a contact arrangement arranged at the free end of the switching element, which has two contact blades as the main contact and a front Zündhorn as an auxiliary contact for electrical contacting of the contact piece, the switching element between a first position in which neither the main nor auxiliary contact electrically contact the contact piece and a second position in which both the main contact and the auxiliary contact electrically contact the contact piece back and forth be movable and wherein the contact piece has a structure formed as a slot for the electrical contact to the auxiliary contact.
  • the auxiliary contact acts as a leading contact in relation to the main contact.
  • the earthing switch for earthing a contact element of the circuit device has a movable switching element and a contact arrangement arranged at the free end of the switching element, which has a main contact and an auxiliary contact for electrical contact of the contact element, the switching element being between a first position in the the main or auxiliary contact electrically contact the contact element and a second position in which both the main contact and the auxiliary contact can electrically contact the contact element and the contact element has a structure for the electrical contact to the auxiliary contact
  • the Auxiliary contact is formed by a rigid arm of the contact arrangement, the main contact being arranged fixed within the contact arrangement.
  • the rigid arm forming the auxiliary contact can now be matched to the structure of the contact element for electrical contacting the auxiliary contact such that it releases from the contact element when the earthing switch is opened with a resilient snap movement. In this way, the earthing switch opens very abruptly at a time when the main contact is already relatively far away from the contact element.
  • the contact switch is generally to be understood as an arrangement of elements of the contact switch, that is, as a contact switch arrangement. One of these elements is then the contact element with its structure for making electrical contact with the auxiliary contact. This element is in the open position of the contact switch separately from the other elements of the contact switch.
  • the result is a main contact system with the main contact and the contact element as contact and counter contact, and an auxiliary contact system with the auxiliary contact and the structure of the contact element as contact and counter contact.
  • the structure of the contact element for the electrical contacting of the auxiliary contact is designed as a rear grip structure with an inclined slope that can be gripped behind by the rigid arm.
  • This structure is in particular a nose structure, ie a structure in the form of a nose. This form means that the auxiliary contact is closed when the earthing switch is closed via the gently brought into a corresponding rear grip position on the rear grip structure and snaps or whips abruptly away from the contact element when opening.
  • the main and auxiliary contacts are arranged in such a way that the auxiliary contact is designed as a leading auxiliary contact which contacts the contact elements when the earthing switch closes before the main contact.
  • the earthing switch is movably mounted on a base element. It is preferably provided that the contact element is grounded via the base element. For this purpose, the base element is or is grounded.
  • the circuit device has the base element and that the earthing switch is designed as a built-on earthing switch.
  • the main contact is formed by a rigid arm of the contact arrangement, the contact arrangement branching out over the two arms.
  • the rigid arm is integrated into the contact arrangement via a torsion spring. This allows the rigid arm to be preloaded. It is preferred to see that the torsion spring is arranged at the free end of the rigid arm.
  • the earthing switch is an aforementioned earthing switch.
  • Theêtele element is a component of the earthing switch or at least one component of the medium and / or high voltage switching device.
  • Fig. 3 shows the sequence of movements when opening the ge in Fig. 1
  • Fig. 6 shows the sequence of movements when closing an earthing switch with a different modified auxiliary contact
  • Fig. 7 shows the sequence of movements when opening the earthing switch with a different modified auxiliary contact.
  • Fig. 1 shows a part of a medium and / or high-voltage circuit device 10 including an earthing switch 12 for this medium and / or high-voltage circuit device 10.
  • the earthing switch 12 is designed as a so-called Cultivator and the part shown the circuit device 10 consists of a base plate trained base element 14, which carries an insulator 16, on which a contact element 18 is arranged, which is electrically insulated from the base element 14 via the insulator 16.
  • the grounding switch 12 has a switching element 20 for grounding a mating contact formed by the contact element 18.
  • the contact element 18 can be understood as a component of the earthing switch 12, but is always part of the medium and / or high-voltage circuit device 10, in which the earthing switch 12 is integrated.
  • the contact element 18 has a structure 22, the shape and function of which will be discussed again in detail below in connection with the individual components of the switching element 20.
  • the switching element 20 is movable, more precisely pivotable, mounted on the base element 14 via a bearing 24 (double arrow 26) and has a contact arrangement 30 at its free end 28.
  • the contact arrangement 30 in turn has a star arm 32 which forms a main contact 34 of the switching element 20.
  • a rigid arm 38 branches off at a branch 36 of the contact arrangement 30 and forms an auxiliary contact 40 of the contact arrangement 30.
  • the term contact naturally refers in particular to an electrical contact. One can therefore refer to the two arms 32, 38 as contact arms 32, 38.
  • the rigid arm 38 is preferably made of aluminum and the structure 22 of the contact element 18 is made of stainless steel.
  • a contact arrangement 30 with a main contact 32 and an auxiliary contact 40 for the respective electrical contacting of the contact element 18 or of corresponding structures 18 of this contact element.
  • the main contact 32 contacts the base of the contact element 18 and the auxiliary contact 40 contacts the contact element 18 via the structure 22 of the contact element 18.
  • the structure 22 of the contact element 18 is designed for the electrical contacting of the auxiliary contact 40 as a rear grip structure with an inclined slope that can be gripped behind by the rigid arm 38.
  • This structure 22 is in particular a nose-shaped structure 22. With this shape, the auxiliary contact 40 is gently brought into a corresponding rear grip position on the rear grip structure 22 when the earthing switch 12 is closed, and snaps or whips abruptly from the contact element 18 when it is opened path.
  • the earthing switch 12 shown here is an earthing switch 12 in the form of a so-called mounting earth for disconnector of any type. However, it can also be designed as a stand-alone grounding switch 12.
  • the auxiliary contact 40 is specifically formed by an aluminum rod (ko African, AL 7075 T6) and the structure 22 of the contact element 18 by a stainless steel nose.
  • the stainless steel nose is, as I said, part of the fixed contact element 18 of the earthing switch 12 and the conical aluminum rod is part of the movable contact assembly 30 of the earthing switch 12.
  • the conical aluminum rod has a small end element 42 made of stainless steel for dielectric shielding at the free end tion and to accommodate the switching arc.
  • auxiliary contact 40 The design of the auxiliary contact 40 is thus characterized in detail by the following features:
  • the structure 22 serving as an auxiliary mating contact is a stainless steel nose which is part of the contact element 18 serving as a mating contact.
  • FIGS 2 to 7 now show different variants of the earthing switch 12 and its movement when closing (arrow 44) and when opening (arrow 46).
  • the auxiliary contact 40 acts as a leading contact with respect to the main contact 34 of the contact arrangement 30 of the earthing switch 12.
  • the bending-resistant arm 38 formed as an aluminum rod with the round end element 42 made of stainless steel contacts during the Run of the main contact system 18, 34 with the run-in slope of the structure 22 designed as a stainless steel nose, until the arm 38 then engages in the structure 22 by the further movement of the contact arrangement 30.
  • the current path is closed by the auxiliary contact system 22, 38, 42 ge and the main contact system 18, 32 can turn on voltage freely.
  • the auxiliary contact system 22, 38, 42 When the earthing switch 12 (FIGS. 3, 5 and 7) is switched off, the auxiliary contact system 22, 38, 42 is still closed.
  • the main contact system 18, 32 of the earthing switch 12 can open voltage-free.
  • the rigid arm 38 tensions (similar to a whip) until the protruding length of the rigid arm 38 has passed through the nose-shaped structure 22.
  • the rigid arm 38 leaves the structure 22, it whips back into its starting position (arrow 48).
  • the electrical contact of the auxiliary contact system 22, 38, 42 thereby opens at a very high speed Rapid switching of the auxiliary contact system 22, 38, 42 avoids a switching arc or is only weak or minimal.
  • FIG. 2 shows the sequence of movements when the earthing switch 12 shown in FIG. 1 is closed
  • FIG. 3 shows the sequence of movements when the earthing switch 12 shown in FIG. 1 is opened.
  • auxiliary contact system 22, 38, 42 with a short, rigid arm 38 (in particular aluminum rod).
  • Switching off Switching off the main contact system -> preloading auxiliary contact system 22, 38, 42 -> quick switch-off.
  • Cost-effective variant for switching small induced currents and voltages up to the nominal voltage level of 245 kV (to be restricted or expanded in the case of a detailed design).
  • FIG. 4 shows the sequence of movements when closing a Va riante of the earthing switch 12 with a slightly different auxiliary contact 40.
  • FIG. 5 shows the sequence of movements when the earthing switch 12 already shown in FIG. 4 is opened.
  • auxiliary contact system 22, 38, 42 with a long, rigid arm 38 (in particular aluminum rod).
  • Switching off Switching off the main contact system -> preloading the auxiliary contact system -> fast switching off.
  • Cost-effective variant for switching induced currents and voltages of the nominal voltage level 245 to 420 kV (to be restricted or expanded in the case of detailed design).
  • Fig. 6 shows the sequence of movements when closing a further variant of the earthing switch 12 with a slightly modified auxiliary contact 40.
  • Fig. 7 shows the sequence of movements when the earthing switch 12 already shown in Fig. 4 is opened.
  • the rigid arm 38 is on attached free end of the rigid arm 32 and points with its free end in the opposite direction as the rigid arm 32 ("hanging attachment").
  • This variant is referred to below as auxiliary contact system 22, 38, 42 with a long rigid arm 38 (in particular aluminum rod) and spring support.
  • Switching off Switching off the main contact system -> preloading the auxiliary contact system -> fast switching off.
  • the rod accelerates faster (a higher switching speed) compared to systems with massive auxiliary contacts and spring support
  • the elasticity of the selected aluminum enables such a high speed when leaving the stainless steel hook that practically no arc occurs (so short in time that it is possible to switch virtually arc-free - 'ho-arc feature').
  • conventional solutions always lead to long (large) arcs.

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)

Abstract

Interrupteur de mise à la terre pour un dispositif de commutation de moyenne et/ou haute tension et dispositif de commutation correspondant La présente invention concerne un interrupteur de mise à la terre (12) pour un dispositif de commutation de moyenne et/ou haute tension (10). L'interrupteur de mise à la terre (12) comprend pour la mise à la terre d'un élément de contact (18) du dispositif de commutation (10) un élément de commutation mobile (20) et un agencement de contacts (30) qui est disposé à une extrémité libre (28) de l'élément de commutation (20) et qui comporte un contact principal (34) et un contact auxiliaire (40) pour contacter électriquement l'élément de contact (18). L'élément de commutation (20) peut être basculé alternativement entre une première position, à laquelle ni le contact principal ni le contact auxiliaire (34, 40) ne contactent électriquement l'élément de contact (18), et une seconde position à laquelle aussi bien le contact principal (34) que le contact auxiliaire (40) contactent électriquement l'élément de contact (18). Selon la présente invention, le contact auxiliaire (40) est formé par un bras inflexible (38) de l'agencement de contacts (30), le contact principal (32) étant disposé de manière fixe à l'intérieur de l'agencement de contacts (30). La présente invention concerne en outre un dispositif de commutation de moyenne et/ou haute tension (10) équipé d'un interrupteur de mise à la terre (12) de ce genre.
EP19820994.2A 2018-12-21 2019-11-22 Interrupteur de mise à la terre pour un dispositif de commutation de moyenne et/ou haute tension et dispositif de commutation correspondant Pending EP3871244A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018222848.5A DE102018222848A1 (de) 2018-12-21 2018-12-21 Erdungsschalter für eine Mittel- und/oder Hochspannungs-Schaltungseinrichtung und entsprechende Schaltungseinrichtung
PCT/EP2019/082174 WO2020126302A1 (fr) 2018-12-21 2019-11-22 Interrupteur de mise à la terre pour un dispositif de commutation de moyenne et/ou haute tension et dispositif de commutation correspondant

Publications (1)

Publication Number Publication Date
EP3871244A1 true EP3871244A1 (fr) 2021-09-01

Family

ID=68887370

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19820994.2A Pending EP3871244A1 (fr) 2018-12-21 2019-11-22 Interrupteur de mise à la terre pour un dispositif de commutation de moyenne et/ou haute tension et dispositif de commutation correspondant

Country Status (5)

Country Link
EP (1) EP3871244A1 (fr)
CN (1) CN113196435A (fr)
BR (1) BR112021010973A2 (fr)
DE (1) DE102018222848A1 (fr)
WO (1) WO2020126302A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2988610A (en) * 1958-06-02 1961-06-13 James R Kearney Corp Of Canada Arc-break device
EP3161845A1 (fr) * 2014-06-26 2017-05-03 Siemens Aktiengesellschaft Ensemble de contact d'amorçage d'arc fixe et commutateur de mise à la terre associé

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1276046A (fr) * 1960-10-03 1961-11-17 Comp Generale Electricite Perfectionnements aux sectionneurs électriques à cornes à coupure rapide
BE743177A (fr) * 1968-12-30 1970-05-14
FR2665019B1 (fr) * 1990-07-19 1992-09-18 Merlin Gerin Sectionneur a haute tension.
FR2691008A1 (fr) * 1992-05-11 1993-11-12 Gec Alsthom Engergie Inc Sectionneur de terre à ouverture perpendiculaire.
DE19949493A1 (de) 1999-10-14 2001-04-19 Abb Patent Gmbh Erdungsschalter
EP1267374B1 (fr) * 2001-06-11 2010-10-27 Schneider Electric Industries SAS Appareillage électrique de coupure à pont de contact mobile
CN203812787U (zh) * 2014-03-28 2014-09-03 Abb技术有限公司 一种接地开关
CN107170632B (zh) * 2016-03-08 2019-10-08 湖南长高高压开关有限公司 主回路与灭弧室并联以开合感应电流的超高压接地开关

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2988610A (en) * 1958-06-02 1961-06-13 James R Kearney Corp Of Canada Arc-break device
EP3161845A1 (fr) * 2014-06-26 2017-05-03 Siemens Aktiengesellschaft Ensemble de contact d'amorçage d'arc fixe et commutateur de mise à la terre associé

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2020126302A1 *

Also Published As

Publication number Publication date
CN113196435A (zh) 2021-07-30
BR112021010973A2 (pt) 2021-09-08
WO2020126302A1 (fr) 2020-06-25
DE102018222848A1 (de) 2020-06-25

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