EP0214083B1 - Disjoncteur-sectionneur pour des réseaux à moyenne tension - Google Patents

Disjoncteur-sectionneur pour des réseaux à moyenne tension Download PDF

Info

Publication number
EP0214083B1
EP0214083B1 EP86730115A EP86730115A EP0214083B1 EP 0214083 B1 EP0214083 B1 EP 0214083B1 EP 86730115 A EP86730115 A EP 86730115A EP 86730115 A EP86730115 A EP 86730115A EP 0214083 B1 EP0214083 B1 EP 0214083B1
Authority
EP
European Patent Office
Prior art keywords
contact
ring
arcing
contact member
slotted
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.)
Expired - Lifetime
Application number
EP86730115A
Other languages
German (de)
English (en)
Other versions
EP0214083A1 (fr
Inventor
Hans-Jürgen Dr.-Ing. Reinhardt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Priority to AT86730115T priority Critical patent/ATE53700T1/de
Publication of EP0214083A1 publication Critical patent/EP0214083A1/fr
Application granted granted Critical
Publication of EP0214083B1 publication Critical patent/EP0214083B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • H01H33/04—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
    • H01H33/125—Load break switches comprising a separate circuit breaker
    • H01H33/126—Load break switches comprising a separate circuit breaker being operated by the distal end of a sectionalising contact arm
    • 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
    • H01H33/18—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet

Definitions

  • the invention relates to a switch-disconnector for the medium-voltage range with separable main contacts and an extinguishing tube made of plastic, which contains a movable contact with a burn-off ring and a fixed contact with an associated burn-off contact, which form a parallel current path to the main contacts, in which the movable Contact piece contains a switching pin with a locking head and an annular edge flange, which is located on the side of the switching pin facing away from the locking head, is connected to the burning ring and ends in a piston-like extinguishing body made of gas-emitting insulating material, which has a narrow gap to the extinguishing tube.
  • Such a load break switch is known from DE-OS 31 11 790.
  • the fixed contact is hollow-cylindrical and in the movable contact, the switching pin ends in the bottom of a hollow cylinder surrounding it with an edge flange.
  • the two main contacts are first disconnected and the current flows via the parallel current path in the quenching tube, formed from the fixed hollow cylindrical contact and the movable contact, the edge flange of which is in contact with the hollow cylindrical contact.
  • the switching pin of the movable contact piece is carried along by the locking head against the force of a return spring.
  • the edge flange with the burning ring is pulled out of the hollow cylindrical contact piece, so that an arc is created in the gap between the extinguishing tube and the piston-like extinguishing body.
  • the base of the arc is on the burn ring or burn contact.
  • the arc releases gases from the plastic of the quenching tube as well as from the gas-emitting insulating material of the quenching body, which cools the arc and extinguishes it in a current zero crossing.
  • the arc is generally always drawn at the same point on the circumference of the contact piece and the edge flange and thus also at the same point on the burn-off contact or burn-off ring connected to them, namely starting from the best current contact point along the circumference, due to design, manufacturing tolerances or by special pressure means.
  • the arc always remains in the same place even after it has run out of the narrow gap in which it was drawn. As a result, the erosion of the extinguishing body and the extinguishing tube are concentrated at this point and this local combustion leads to a reduced service life of the extinguishing system of the switch disconnector.
  • a load break switch in which the movable switching element in the extinguishing system contains a switching pin with a detent head, which ends in an annular contact on the other side, behind which there is an extinguishing pin which has a narrow gap to the extinguishing tube.
  • the associated switching element is designed as a current conducting path that runs according to a surface line of the extinguishing tube.
  • a pressure element is provided, which is diametrically opposite to the stationary contact and ensures contact between the stationary and the movable contact. With this switch disconnector, the switch-off arc is always drawn at the same point, so that the erosion of the arcing chamber is one-sided.
  • the invention is based on the object of designing a load-break switch in such a way that the erosion caused by the switch-off arc is distributed as evenly as possible over the circumference of the extinguishing tube or extinguishing body, so that the life of the extinguishing system is increased.
  • the burn-off ring is slotted in a switch-disconnector of the type described at the outset according to the invention, forms at least one turn and is connected on one side adjacent to the slot via a contact web with the edge flange and, furthermore, the burn-off contact connected to the fixed contact piece is also a slotted ring formed, which is adjacent to the slot on one side via a contact web with the edge of the fixed contact, the space between the edge of the fixed and / or movable contact and the burn-off contact and / or the burn-off ring and the slot of the burn-off ring and / or burn-off contact with Insulation are filled.
  • the special structural design of the burn-off ring connected to the edge flange of the movable contact piece triggers a rotational movement in the event of an arc drawn to the side of the contact web, which is directed away from the contact web, so that the arc burns up to one turn within its duration in the quenching chamber formed by the quenching tube and quenching body runs to the end of the slotted burn ring, or rotates several times with two or more turns. This ensures that the extinguishing chamber burns down uniformly.
  • the slotted burn-off ring connected to the edge flange has only one turn and a pressure element is provided which controls the contact pressure between the movable switch piece and the standing contact piece, it is advisable to place the pressing element approximately diametrically opposite to an area of the slotted burning ring which is at least five to ten contact bar widths away from the contact web between the sliding contact ring and the slotted burning ring on the continuous ring side. As a result, almost the entire circumference of the slotted torch ring can be used for the arc rotation.
  • the contact webs of the burn-off ring and the burn-off contact and the slots are each on a longitudinal plane, so that rotation is ensured even with small arc lengths because the base points of the arc move in the same direction.
  • FIGS. 1 to 4 of the drawing show schematically a side view of a switch disconnector.
  • FIG. 2 schematically shows a longitudinal section through an extinguishing system of this switch disconnector designed according to the invention, the upper right part being somewhat rotated relative to the longitudinal plane shown.
  • FIG. 3 shows, partly in a perspective view, a part of a movable switching element that is slightly modified compared to FIG. 2, and
  • FIG. 4 shows the stationary switching element.
  • Each pole of the load break switch 1 shown in Figure 1 consists essentially of three post insulators 2, 3, 4, which are attached to a frame-like frame 5 and carry the current-carrying elements.
  • the support insulator 2 thus carries the first connection device 6, which is connected via a flexible current strip 7 to the main contact 8 located on the support insulator 3.
  • the counter contact 9 for the locking head 10 of the movable switching piece 11 is arranged in the extinguishing system 12.
  • the extinguishing system 12 and the second main contact 13, as well as the second connection device 14 are fastened to the post insulator 4 via a carrier 15. While the support insulators 2 and 4 are fixed, the support insulator 3 is designed to be pivotable by means of a drive shaft 16 and a drive system, not shown, and carries out the on and off movement of the load-break switch 1.
  • the load break switch 1 is shown in the switched-off state.
  • the drive shaft 16 is actuated, thereby moving the support insulator 3 in the direction of the extinguishing system 12.
  • the main contact 8 comes into engagement with the main contact 13, while the counter contact 9 comes into engagement with the latching head 10 of the movable contact piece 11, which in turn is in contact with the standing contact piece 17 in the extinguishing system 12, which is also attached to the carrier 15.
  • the main contacts 8 and 13 detach from each other, while the parallel current path from the first connection device 6 via the mating contact 9, the locking head 10 and the movable contact piece 11 and the corresponding standing contact piece 17 to second connection device 14 is retained.
  • the latching head 10 is carried by the counter-contact 9 during the opening movement against the force of a return spring, not shown, which is tensioned, and the movable contact piece 11 initially slides along the standing contact piece 17. If the main contacts 8, 13 are at a sufficiently large distance from one another, the movable contact piece 11 also separates from the stationary contact piece 17 in the extinguishing system 12, and a switch-off arc 18 (FIG. 2) arises, which extinguishes before the latching head 10 is released. Finally, the locking head 10 detaches from the mating contact 9 and the movable contact piece 11 is returned to its starting position within the extinguishing system 12 by the return spring (not shown).
  • a return spring not shown
  • the extinguishing system 12 consists of a two-part outer extinguishing tube 19 made of plastic, which is attached to an annular part of the carrier 15, which is also connected to the hollow cylindrical switching element 17.
  • the switching pin 20 of the movable contact piece 11 is arranged centrally in the interior of the extinguishing tube 19 and, with its end 21 facing away from the latching head 10, penetrates the bottom 22 of a hollow cylinder 23 made of copper and ends in a piston-like extinguishing body 24 surrounding the hollow cylinder 23.
  • the hollow cylinder 23 has an upper edge flange 25, the outer diameter of which is smaller than the inner diameter of the extinguishing tube 19.
  • the outside diameter of the piston-like quenching body 24 made of gas-emitting insulating material is also smaller than the inside diameter of the quenching tube 19, so that it forms a gap 26 with it.
  • the edge flange 25 of the hollow cylinder 23 is connected to a slotted burning ring 27, for which purpose a contact web 28 located next to the slot is used.
  • the slotted burn ring 27 forms a turn.
  • the space between the edge flange 25, the hollow cylinder 23 and the burning ring 27 is filled by a spacer 29 made of insulating material.
  • the standing contact 17 is also connected to a burn-off contact 30, which is designed as a slotted ring and is adjacent to the slot 31 (see Figure 4) is connected on one side via the contact web 32 to the edge 33 of the standing contact 17.
  • the space between the edge 33 of the standing contact 17 and the burn-off contact 30 is filled with insulating material 34, the inner surface 35 of which is set back from the burn-off contact 30.
  • the two contact webs 28, 32 on the movable contact piece 11 and on the standing contact piece 17 each lie on the same longitudinal plane. They are not exactly diametrically opposed to a pressure element 36 consisting of a set screw, which lies in a longitudinal plane rotated to the longitudinal section of FIG. 2, but offset by about five to ten contact web widths on the continuous ring side.
  • the pressing element 36 acts on the surface of the extinguishing body 24 so that there is a clear contact between the crowned outer surface 37 of the burning ring 27 and the inner circumferential surface 38 of the hollow cylindrical, standing switching element 17 by five to ten contact web widths compared to the diametrically offset point and the switch-off arc 18 is drawn there in each case.
  • the current flows from the first connection device 6 and the mating contact 9 to the detent head 10. Then via the switching pin 20 and the base 22, as well the hollow cylinder 23 to the edge flange 25. This is indicated by small arrows. From the edge flange 25, the current passes over the contact web 28 to the burning ring 27. As long as the burning ring 27 is located within the hollow cylindrical, standing contact 17, the current passes from the burning ring 27 via its spherical outer surface 37 to the inner lateral surface 38 of the standing contact 17 and is then passed via the carrier 15 to the second connection device.
  • the switch-off arc 18 is therefore safe with a further switch-off movement ignited at the burn-off contact 30 and not at the edge 33.
  • the other base point of the switch-off arc 18 lies on the burn-off ring 27.
  • the burn-off ring 27 and the burn-off contact 30 are slotted rings, the current from the arc base via the respective contact web 28 or 32 must be around five to ten contact web widths are removed, flow and this creates magnetic forces which drive the switch-off arc 18 away from the contacting point to the other end of the slotted burn ring 27 or 30.
  • the switch-off arc 18 releases gases from the adjacent surfaces of the quenching body 24 or the quenching tube 19 during its burning.
  • the areas exposed to the arc are distributed over part or even over the entire circumference of the extinguishing system 12. The parts of the extinguishing system 12 are therefore more uniformly stressed and the life of the extinguishing system 12 is increased accordingly.
  • FIG. 3 shows in perspective and schematically the hollow cylinder 23, not cut, with its edge flange 25. This is connected to the burning ring 27 via the contact web 28.
  • the burning ring 27 here has two turns 39, 40, which are each interrupted by a slot 41.
  • the course of the current during the burning of the shutdown arc 18 is indicated by arrows.

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Circuit Breakers (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Keying Circuit Devices (AREA)

Claims (5)

1. Sectionneur sous charge (1) pour la plage des moyennes tensions, comportant des contacts principaux (8, 13) pouvant être séparés et un tube d'extinction (19) en matière plastique, qui contient une pièce de contact mobile (11) comportant un anneau pare-étincelles (27) et une pièce de contact fixe (17), à laquelle est relié un contact pare-étincelles (30), ces pièces de contact formant un trajet de courant parallèle aux contacts principaux (8, 13), et dans lequel la pièce de contact mobile (11) comprend une tige de contact (20) comportant une tête d'encliquetage (10) et une bride marginale annulaire (25), qui s'applique sur le côté (10) de la tige de contact (20), tourné vers la tête d'encliquetage, qui est reliée à l'anneau pare-étincelles (27) et qui se termine par un corps d'extinction de forme tubulaire (24) réalisé en un matériau isolant, qui dégage du gaz et délimite, avec le tube d'extinction (19), une fente étroite (26), caractérisé par le fait que l'anneau pare-étincelles (27) est fendu, forme au moins une spire (39, 40) et est relié unilatéralement, au voisinage de la fente (41), à la bride marginale (25) par l'intermédiaire d'une barrette de contact (28), et que le contact pare-étincelles (30) relié à la pièce de contact fixe (17) est également agencé sous la forme d'une bague fendue, qui est reliée unilatéralement, au voisinage de la fente (31), par l'intermédiaire d'une barrette de contact (32) au bord (33) de la pièce de contact fixe (17), l'espace entre le bord (25; 33) de la pièce de contact fixe (11) et/ou de la pièce de contact mobile (17) et le contact pare-étincelles (30) et/ou l'anneau pare-étincelles (27) ainsi que la fente (31; 41) de l'anneau pare-étincelles (25) et/ou du contact pare-étincelles (30) étant remplis par un matériau isolant.
2. Sectionneur sous charge suivant la revendication 1, caractérisé par le fait que l'anneau pare-étincelles fendu (25), qui est relié à la bride marginale (25), comporte deux spires (39, 40).
3. Sectionneur sous charge suivant la revendication 1, caractérisé par le fait que l'anneau pare-étincelles fendu (27), qui est relié à la bride marginale, ne comporte qu'une spire et qu'il est prévu un élément de pression (36), qui assure la pression de contact entre la pièce de contact mobile (11) et la pièce de contact fixe (17), et que l'élément de pression (36) est approximativement diamétralement opposée à une zone de l'anneau pare-étincelles fendu (27), qui est éloignée de la barrette de contact (28) sur le côté continu de l'anneau, et ce sur une distance comprise entre au moins cinq et dix largeurs de la barrette de contact.
4. Sectionneur sous charge suivant la revendication 1 et 3, caractérisé par le fait que les barrettes de contact (28, 32) de l'anneau pare-étincelles (27) et du contact pare-étincelles (30) et les fentes (31; 41) sont situées respectivement dans un plan longitudinal.
5. Sectionneur sous charge suivant la revendication 1 ou 3, caractérisé par le fait que la tige de contact (20) de la pièce de contact mobile (11) se termine par le fond (22) d'un cylindre conducteur creux (23), qui entoure la tige et dont la bride marginale supérieure (25) est reliée à l'anneau pare-étincelles (27), le cylindre creux (23), qui entoure la tige et dont la bride marginale supérieure (25) est reliée à l'anneau pare-étincelles (27), le cylindre creux (23) étant entouré, en dehors de la bride marginale (25) et de l'anneau pare-étincelles fendu (27), par le corps d'extinction de forme tubulaire (24), et que l'espace présent entre le cylindre creux conducteur (23), sa bride annulaire (25) et l'anneau pare-étincelles fendu (27) est rempli par une entretoise (29) réalisée en un matériau isolant.
EP86730115A 1985-08-01 1986-07-22 Disjoncteur-sectionneur pour des réseaux à moyenne tension Expired - Lifetime EP0214083B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86730115T ATE53700T1 (de) 1985-08-01 1986-07-22 Lasttrennschalter fuer den mittelspannungsbereich.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19853527880 DE3527880A1 (de) 1985-08-01 1985-08-01 Lasttrennschalter fuer den mittelspannungsbereich
DE3527880 1985-08-01

Publications (2)

Publication Number Publication Date
EP0214083A1 EP0214083A1 (fr) 1987-03-11
EP0214083B1 true EP0214083B1 (fr) 1990-06-13

Family

ID=6277602

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86730115A Expired - Lifetime EP0214083B1 (fr) 1985-08-01 1986-07-22 Disjoncteur-sectionneur pour des réseaux à moyenne tension

Country Status (3)

Country Link
EP (1) EP0214083B1 (fr)
AT (1) ATE53700T1 (fr)
DE (2) DE3527880A1 (fr)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE758950C (de) * 1940-02-09 1952-04-17 Porzellanfabrik Kahla Fuer Starkstromschalter bestimmter stift- und huelsenfoermiger Unterbrechungskontakt
DE3111790A1 (de) * 1981-03-20 1982-09-30 Siemens AG, 1000 Berlin und 8000 München Lasttrennschalter mit trennkontakten und mit einer loescheinrichtung
JPS58204429A (ja) * 1982-05-24 1983-11-29 株式会社東芝 ガス絶縁開閉器

Also Published As

Publication number Publication date
ATE53700T1 (de) 1990-06-15
DE3672017D1 (de) 1990-07-19
EP0214083A1 (fr) 1987-03-11
DE3527880A1 (de) 1987-02-05

Similar Documents

Publication Publication Date Title
DE2209287C3 (de) Elektrischer Druckgasschalter
DE2707148A1 (de) Vakuumschalter mit magnetspule
DE2946800C2 (de) Vakuumschalter
DE3141324C2 (de) Leistungsschalter
DE3402372A1 (de) Elektrisches schaltelement
DE3900684A1 (de) Schaltkontakt fuer vakuumschalter
DE3318873C2 (fr)
DE2204113C3 (de) Kontaktanordnung für Vakuumschalter
DE3319010C2 (fr)
DE1236053B (de) Elektrischer Schalter, insbesondere Vakuumschalter
EP0743665B1 (fr) Disjoncteur
DE2613378B2 (de) Lichtbogenloescheinrichtung
DE2508299A1 (de) Elektrisches schaltgeraet
EP0214083B1 (fr) Disjoncteur-sectionneur pour des réseaux à moyenne tension
DE3818510A1 (de) Vakuumschalter
EP0136965A1 (fr) Sectionneur pour appareillage de commutation haute tension logé dans une enceinte métallique à gaz comprimé
DE2349187C3 (de) Vorrichtung zur Unterbrechung von Stromkreisen
DE3736835A1 (de) Hochspannungsschalter
DE2624595C3 (de) Kontaktanordnung für Druckgasschalter
DE3242012C2 (fr)
DE4205501C1 (en) High tension switch preventing arcing when switched off - has two slidable contacts surrounded by insulating nozzle during on state, and control electrode surrounding nozzle.
DE2828773A1 (de) Autopneumatischer druckgasschalter
DE3540474C2 (fr)
DE3538955A1 (de) Druckgasschalter
DE3609161A1 (de) Trennschalter

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT CH DE FR LI NL

17P Request for examination filed

Effective date: 19870407

17Q First examination report despatched

Effective date: 19880909

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT CH DE FR LI NL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19900613

Ref country code: FR

Effective date: 19900613

REF Corresponds to:

Ref document number: 53700

Country of ref document: AT

Date of ref document: 19900615

Kind code of ref document: T

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 19900704

Year of fee payment: 5

REF Corresponds to:

Ref document number: 3672017

Country of ref document: DE

Date of ref document: 19900719

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19900919

Year of fee payment: 5

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19901024

Year of fee payment: 5

EN Fr: translation not filed
NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Effective date: 19910722

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Effective date: 19910731

Ref country code: CH

Effective date: 19910731

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19920401